From fb71edfb6bc0702aa2ee1cc73d0822bbc37674ad Mon Sep 17 00:00:00 2001
From: fishsoupisgood <github@madingley.org>
Date: Sun, 24 Jan 2021 09:23:12 +0000
Subject: working-ish sensor

---
 .gitmodules                          |   6 +
 humidity_sensors/STM8S_StdPeriph_Lib |   1 +
 humidity_sensors/app/clock.c         |  56 ++++
 humidity_sensors/app/gpio.c          |  77 ++++++
 humidity_sensors/app/i2c.h           |   3 +
 humidity_sensors/app/i2c_bb.c        | 157 +++++++++++
 humidity_sensors/app/main.c          |  27 ++
 humidity_sensors/app/project.h       |  14 +
 humidity_sensors/app/prototypes.h    |  35 +++
 humidity_sensors/app/sht20.c         | 121 ++++++++
 humidity_sensors/app/stm8s_conf.h    | 120 ++++++++
 humidity_sensors/app/stm8s_it.c      | 522 +++++++++++++++++++++++++++++++++++
 humidity_sensors/app/stm8s_it.h      | 201 ++++++++++++++
 humidity_sensors/app/uart.c          | 142 ++++++++++
 humidity_sensors/app/util.c          |  39 +++
 humidity_sensors/stm8flash           |   1 +
 16 files changed, 1522 insertions(+)
 create mode 160000 humidity_sensors/STM8S_StdPeriph_Lib
 create mode 100644 humidity_sensors/app/clock.c
 create mode 100644 humidity_sensors/app/gpio.c
 create mode 100644 humidity_sensors/app/i2c.h
 create mode 100644 humidity_sensors/app/i2c_bb.c
 create mode 100644 humidity_sensors/app/main.c
 create mode 100644 humidity_sensors/app/project.h
 create mode 100644 humidity_sensors/app/prototypes.h
 create mode 100644 humidity_sensors/app/sht20.c
 create mode 100644 humidity_sensors/app/stm8s_conf.h
 create mode 100644 humidity_sensors/app/stm8s_it.c
 create mode 100644 humidity_sensors/app/stm8s_it.h
 create mode 100644 humidity_sensors/app/uart.c
 create mode 100644 humidity_sensors/app/util.c
 create mode 160000 humidity_sensors/stm8flash

diff --git a/.gitmodules b/.gitmodules
index 6011582..1ac252c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,9 @@
 [submodule "boiler-monster/stm32/libopencm3"]
 	path = boiler-monster/stm32/libopencm3
 	url = git://git.panaceas.org/stm32/libopencm3
+[submodule "humidity_sensors/stm8flash"]
+	path = humidity_sensors/stm8flash
+	url = ssh://git@git.panaceas.org/git/stm8/stm8flash/
+[submodule "humidity_sensors/STM8S_StdPeriph_Lib"]
+	path = humidity_sensors/STM8S_StdPeriph_Lib
+	url = ssh://git@git.panaceas.org/git/stm8/STM8S_StdPeriph_Lib
diff --git a/humidity_sensors/STM8S_StdPeriph_Lib b/humidity_sensors/STM8S_StdPeriph_Lib
new file mode 160000
index 0000000..a9ef0b8
--- /dev/null
+++ b/humidity_sensors/STM8S_StdPeriph_Lib
@@ -0,0 +1 @@
+Subproject commit a9ef0b8cab8dbb2472e29b8692b9c3e2eb866cd0
diff --git a/humidity_sensors/app/clock.c b/humidity_sensors/app/clock.c
new file mode 100644
index 0000000..e84a289
--- /dev/null
+++ b/humidity_sensors/app/clock.c
@@ -0,0 +1,56 @@
+#include "project.h"
+
+CONST u8 HSIDivFactor[4] = { 1, 2, 4, 8 }; /*!< Holds the different HSI Divider factors */
+CONST u8 CLKPrescTable[8] = { 1, 2, 4, 8, 10, 16, 20, 40 }; /*!< Holds the different CLK prescaler values */
+
+u32
+CLK_GetClockFreq (void)
+{
+  u32 clockfrequency = 0;
+  CLK_Source_TypeDef clocksource = CLK_SOURCE_HSI;
+  u8 tmp = 0, presc = 0;
+
+  /* Get CLK source. */
+  clocksource = (CLK_Source_TypeDef) CLK->CMSR;
+
+  if (clocksource == CLK_SOURCE_HSI) {
+    tmp = (u8) (CLK->CKDIVR & CLK_CKDIVR_HSIDIV);
+    tmp = (u8) (tmp >> 3);
+    presc = HSIDivFactor[tmp];
+    clockfrequency = HSI_VALUE / presc;
+  } else if (clocksource == CLK_SOURCE_LSI)
+    clockfrequency = LSI_VALUE;
+  else
+    clockfrequency = HSE_VALUE;
+
+  return ((u32) clockfrequency);
+}
+
+
+void
+clock_init (void)
+{
+  /* Clear High speed internal clock prescaler */
+  CLK->CKDIVR &= (u8) (~CLK_CKDIVR_HSIDIV);
+  /* Set High speed internal clock prescaler */
+  CLK->CKDIVR |= (u8) CLK_PRESCALER_HSIDIV1;
+}
+
+void
+CLK_PeripheralClockConfig (CLK_Peripheral_TypeDef CLK_Peripheral,
+                           FunctionalState NewState)
+{
+  if (((u8) CLK_Peripheral & (u8) 0x10) == 0x00) {
+    if (NewState != DISABLE) {
+      CLK->PCKENR1 |= (u8) ((u8) 1 << ((u8) CLK_Peripheral & (u8) 0x0F)); /* Enable the peripheral Clock */
+    } else {
+      CLK->PCKENR1 &= (u8) (~ (u8) (((u8) 1 << ((u8) CLK_Peripheral & (u8) 0x0F)))); /* Disable the peripheral Clock */
+    }
+  } else {
+    if (NewState != DISABLE) {
+      CLK->PCKENR2 |= (u8) ((u8) 1 << ((u8) CLK_Peripheral & (u8) 0x0F)); /* Enable the peripheral Clock */
+    } else {
+      CLK->PCKENR2 &= (u8) (~ (u8) (((u8) 1 << ((u8) CLK_Peripheral & (u8) 0x0F)))); /* Disable the peripheral Clock */
+    }
+  }
+}
diff --git a/humidity_sensors/app/gpio.c b/humidity_sensors/app/gpio.c
new file mode 100644
index 0000000..38d57d3
--- /dev/null
+++ b/humidity_sensors/app/gpio.c
@@ -0,0 +1,77 @@
+#include "project.h"
+
+u8
+GPIO_ReadInputData (GPIO_TypeDef *GPIOx)
+{
+  return ((u8) GPIOx->IDR);
+}
+
+void
+GPIO_WriteHigh (GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef PortPins)
+{
+  GPIOx->ODR |= (u8) PortPins;
+}
+
+void
+GPIO_WriteLow (GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef PortPins)
+{
+  GPIOx->ODR &= (u8) (~PortPins);
+}
+
+
+/**
+  * @brief  Initializes the GPIOx according to the specified parameters.
+  * @param  GPIOx : Select the GPIO peripheral number (x = A to I).
+  * @param  GPIO_Pin : This parameter contains the pin number, it can be any value
+  *         of the @ref GPIO_Pin_TypeDef enumeration.
+  * @param  GPIO_Mode : This parameter can be a value of the
+  *         @ref GPIO_Mode_TypeDef enumeration.
+  * @retval None
+  */
+
+void
+GPIO_Init (GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef GPIO_Pin,
+           GPIO_Mode_TypeDef GPIO_Mode)
+{
+  /*----------------------*/
+  /* Check the parameters */
+  /*----------------------*/
+
+  /* Reset corresponding bit to GPIO_Pin in CR2 register */
+  GPIOx->CR2 &= (u8) (~ (GPIO_Pin));
+
+  /*-----------------------------*/
+  /* Input/Output mode selection */
+  /*-----------------------------*/
+
+  if ((((u8) (GPIO_Mode)) & (u8) 0x80) != (u8) 0x00) { /* Output mode */
+    if ((((u8) (GPIO_Mode)) & (u8) 0x10) != (u8) 0x00) /* High level */
+      GPIOx->ODR |= (u8) GPIO_Pin;
+    else                      /* Low level */
+      GPIOx->ODR &= (u8) (~ (GPIO_Pin));
+
+    /* Set Output mode */
+    GPIOx->DDR |= (u8) GPIO_Pin;
+  } else {                      /* Input mode */
+    /* Set Input mode */
+    GPIOx->DDR &= (u8) (~ (GPIO_Pin));
+  }
+
+  /*------------------------------------------------------------------------*/
+  /* Pull-Up/Float (Input) or Push-Pull/Open-Drain (Output) modes selection */
+  /*------------------------------------------------------------------------*/
+
+  if ((((u8) (GPIO_Mode)) & (u8) 0x40) != (u8) 0x00) /* Pull-Up or Push-Pull */
+    GPIOx->CR1 |= (u8) GPIO_Pin;
+  else                          /* Float or Open-Drain */
+    GPIOx->CR1 &= (u8) (~ (GPIO_Pin));
+
+  /*-----------------------------------------------------*/
+  /* Interrupt (Input) or Slope (Output) modes selection */
+  /*-----------------------------------------------------*/
+
+  if ((((u8) (GPIO_Mode)) & (u8) 0x20) != (u8) 0x00) /* Interrupt or Slow slope */
+    GPIOx->CR2 |= (u8) GPIO_Pin;
+  else                          /* No external interrupt or No slope control */
+    GPIOx->CR2 &= (u8) (~ (GPIO_Pin));
+}
diff --git a/humidity_sensors/app/i2c.h b/humidity_sensors/app/i2c.h
new file mode 100644
index 0000000..681e6ab
--- /dev/null
+++ b/humidity_sensors/app/i2c.h
@@ -0,0 +1,3 @@
+#define I2C_WRITE 0
+#define I2C_READ 1
+
diff --git a/humidity_sensors/app/i2c_bb.c b/humidity_sensors/app/i2c_bb.c
new file mode 100644
index 0000000..7d0d807
--- /dev/null
+++ b/humidity_sensors/app/i2c_bb.c
@@ -0,0 +1,157 @@
+#include "project.h"
+
+
+#define SCL ((u8) 1 <<4)
+#define SDA ((u8) 1 <<5)
+#define BANK GPIOB
+
+
+static u8
+set (u8 sda, u8 scl)
+{
+  u8 ret;
+
+  if (sda)
+    GPIO_WriteHigh (BANK, SDA);
+  else
+    GPIO_WriteLow (BANK, SDA);
+
+  if (scl)
+    GPIO_WriteHigh (BANK, SCL);
+  else
+    GPIO_WriteLow (BANK, SCL);
+
+  delay (4);
+  //delay_us (10);
+  ret = (GPIO_ReadInputData (BANK) & SDA) ? 1 : 0;
+
+  return ret;
+}
+
+
+
+
+u8
+i2cb_send (u8 wot)
+{
+  u8 i;
+
+  for (i = 0; i < 8; ++i) {
+    set (wot & 0x80, 0);
+    set (wot & 0x80, 1);
+    set (wot & 0x80, 0);
+    wot <<= 1;
+  }
+
+  set (1, 0);
+  i = set (1, 1);
+  set (1, 0);
+
+  return i;
+}
+
+u8
+i2cb_send_addr (u8 addr, u8 rnw)
+{
+  return i2cb_send (addr << 1 | rnw);
+}
+
+int
+i2cb_send_data (u8 d)
+{
+  return i2cb_send (d);
+}
+
+u8
+i2cb_read (u8 ack)
+{
+  u8 i, wot = 0;
+
+  for (i = 0; i < 8; ++i) {
+    wot <<= 1;
+    set (1, 0);
+    wot |= set (1, 1);
+    set (1, 0);
+  }
+
+  set (ack, 0);
+  set (ack, 1);
+  set (ack, 0);
+  return wot;
+}
+
+
+void
+i2cb_start (void)
+{
+  set (1, 1);
+  set (0, 1);
+  set (0, 0);
+}
+
+void
+i2cb_stop (void)
+{
+  set (0, 0);
+  set (0, 1);
+  set (1, 1);
+}
+
+
+int
+i2cb_start_transaction (u8 a, u8 rnw)
+{
+  i2cb_start();
+  return i2cb_send_addr (a, rnw);
+
+}
+
+
+void
+i2cb_reset (void)
+{
+  i2cb_start();
+  i2cb_stop();
+  i2cb_start();
+  i2cb_stop();
+}
+
+
+
+#if 0
+void
+i2cb_scan (void)
+{
+  u8 r;
+  u16 i;
+
+  i2cb_reset();
+
+  for (i = 0; i < 128; ++i) {
+    i2cb_start();
+    i2cb_stop();
+    i2cb_start();
+    r = i2cb_send ((i << 1) | I2C_WRITE);
+    i2cb_stop();
+
+    if (!r)
+      printf ("target found at %02x\n", i);
+
+  }
+
+  i2cb_reset();
+
+}
+#endif
+
+void
+i2cb_init (void)
+{
+  GPIO_Init (BANK, SDA, GPIO_MODE_OUT_OD_HIZ_SLOW);
+  GPIO_Init (BANK, SCL, GPIO_MODE_OUT_OD_HIZ_SLOW);
+
+  set (1, 1);
+  set (0, 1);
+  set (1, 0);
+  set (1, 1);
+}
diff --git a/humidity_sensors/app/main.c b/humidity_sensors/app/main.c
new file mode 100644
index 0000000..a94d681
--- /dev/null
+++ b/humidity_sensors/app/main.c
@@ -0,0 +1,27 @@
+#include "project.h"
+
+void
+main (void)
+{
+  u8 c;
+
+  clock_init();
+
+  uart_init();
+  i2cb_init();
+
+  sht20_reset();
+
+  //enableInterrupts ();
+
+  for (;;) {
+    printf ("$SNTHD,%s,%s\n", sht20_temp_s(), sht20_humid_s());
+
+    while (!uart_rx (&c)) {
+      if (c == 'R')
+        sht20_reset();
+    }
+
+    delay_ms (1000);
+  }
+}
diff --git a/humidity_sensors/app/project.h b/humidity_sensors/app/project.h
new file mode 100644
index 0000000..1c08c73
--- /dev/null
+++ b/humidity_sensors/app/project.h
@@ -0,0 +1,14 @@
+#include "stm8s.h"
+#include "stdio.h"
+#include "stdint.h"
+
+#include "i2c.h"
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+
+#include "prototypes.h"
diff --git a/humidity_sensors/app/prototypes.h b/humidity_sensors/app/prototypes.h
new file mode 100644
index 0000000..35dbcd9
--- /dev/null
+++ b/humidity_sensors/app/prototypes.h
@@ -0,0 +1,35 @@
+/* main.c */
+void main(void);
+/* util.c */
+void assert_failed(uint8_t *file, uint32_t line);
+void delay(volatile uint32_t n);
+void delay_ms(volatile uint32_t n);
+int putchar(int c);
+/* uart.c */
+void uart_tx(uint8_t d);
+int uart_rx(uint8_t *d);
+void uart_init(void);
+/* i2c_bb.c */
+uint8_t i2cb_send(uint8_t wot);
+uint8_t i2cb_send_addr(uint8_t addr, uint8_t rnw);
+int i2cb_send_data(uint8_t d);
+uint8_t i2cb_read(uint8_t ack);
+void i2cb_start(void);
+void i2cb_stop(void);
+int i2cb_start_transaction(uint8_t a, uint8_t rnw);
+void i2cb_reset(void);
+void i2cb_init(void);
+/* clock.c */
+uint32_t CLK_GetClockFreq(void);
+void clock_init(void);
+void CLK_PeripheralClockConfig(CLK_Peripheral_TypeDef CLK_Peripheral, FunctionalState NewState);
+/* gpio.c */
+uint8_t GPIO_ReadInputData(GPIO_TypeDef *GPIOx);
+void GPIO_WriteHigh(GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef PortPins);
+void GPIO_WriteLow(GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef PortPins);
+void GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_Pin_TypeDef GPIO_Pin, GPIO_Mode_TypeDef GPIO_Mode);
+/* sht20.c */
+void sht20_reset(void);
+char *sht20_temp_s(void);
+char *sht20_humid_s(void);
+/* stm8s_it.c */
diff --git a/humidity_sensors/app/sht20.c b/humidity_sensors/app/sht20.c
new file mode 100644
index 0000000..d6d648b
--- /dev/null
+++ b/humidity_sensors/app/sht20.c
@@ -0,0 +1,121 @@
+#include "project.h"
+
+#define SHT20_ADDRESS 0x40
+
+#define TRIGGER_TEMP_MEASURE_HOLD             0xE3
+#define TRIGGER_HUMD_MEASURE_HOLD             0xE5
+#define TRIGGER_TEMP_MEASURE_NOHOLD           0xF3
+#define TRIGGER_HUMD_MEASURE_NOHOLD           0xF5
+#define WRITE_USER_REG                        0xE6
+#define READ_USER_REG                         0xE7
+#define SOFT_RESET                            0xFE
+
+
+void
+sht20_reset (void)
+{
+
+  i2cb_start_transaction (SHT20_ADDRESS, I2C_WRITE);
+  i2cb_send_data (SOFT_RESET);
+  i2cb_stop();
+  delay_ms (100);
+  printf ("$SNTHR\n");
+}
+
+
+char *
+sht20_temp_s (void)
+{
+  u8 h, l, c, s;
+  s32 t, tf;
+  float f;
+  static char ret[8];
+
+  i2cb_start_transaction (SHT20_ADDRESS, I2C_WRITE);
+  i2cb_send_data (TRIGGER_TEMP_MEASURE_NOHOLD);
+  delay_ms (100);
+  i2cb_start_transaction (SHT20_ADDRESS, I2C_READ);
+
+  h = i2cb_read (0);
+  l = i2cb_read (0);
+  c = i2cb_read (1);
+
+  i2cb_stop();
+
+  t = h;
+  t <<= 8;
+  t |= l & 0xfc;
+
+  f = t;
+  f /= 65536.;
+  f *= 175.72;
+  f -= 46.85;
+
+  f *= 100.;
+
+  t = (s32) (f + .5);
+
+  ret[0] = '-';
+
+  if (t >= 0)
+    s = 1;
+  else {
+    s = 0;
+    t = -t;
+  }
+
+  tf = t % 100;
+  t = t / 100;
+
+  sprintf (&ret[1], "%ld.%02ld", t, tf);
+
+  return &ret[s];
+
+}
+
+char *
+sht20_humid_s (void)
+{
+  u8 h, l, c;
+  u32 t, tf;
+  float f;
+  static char ret[8];
+
+  i2cb_start_transaction (SHT20_ADDRESS, I2C_WRITE);
+  i2cb_send_data (TRIGGER_HUMD_MEASURE_NOHOLD);
+  delay_ms (100);
+  i2cb_start_transaction (SHT20_ADDRESS, I2C_READ);
+
+  h = i2cb_read (0);
+  l = i2cb_read (0);
+  c = i2cb_read (1);
+
+  i2cb_stop();
+
+  t = h;
+  t <<= 8;
+  t |= l & 0xfc;
+
+  f = t;
+  f /= 65536.;
+  f *= 125.;
+  f -= 6.;
+
+  if (f < 0)
+    f = 0;
+
+  if (f > 100)
+    f = 100;
+
+  f *= 100.;
+
+  t = (u32) (f + .5);
+  tf = t % 100;
+  t = t / 100;
+
+  sprintf (ret, "%ld.%02ld", t, tf);
+
+
+  return ret;
+
+}
diff --git a/humidity_sensors/app/stm8s_conf.h b/humidity_sensors/app/stm8s_conf.h
new file mode 100644
index 0000000..599f2a7
--- /dev/null
+++ b/humidity_sensors/app/stm8s_conf.h
@@ -0,0 +1,120 @@
+/**
+  ******************************************************************************
+  * @file    stm8s_conf.h
+  * @author  MCD Application Team
+  * @version V2.3.0
+  * @date    16-June-2017
+  * @brief   This file is used to configure the Library.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */ 
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM8S_CONF_H
+#define __STM8S_CONF_H
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm8s.h"
+
+/* Uncomment the line below to enable peripheral header file inclusion */
+#if defined(STM8S105) || defined(STM8S005) || defined(STM8S103) || defined(STM8S003) || \
+    defined(STM8S001) || defined(STM8S903) || defined(STM8AF626x) || defined(STM8AF622x)
+ #include "stm8s_adc1.h" 
+#endif /* (STM8S105) || (STM8S005) || (STM8S103) || (STM8S003) || (STM8S001) || (STM8S903) || (STM8AF626x) || (STM8AF622x) */
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8AF52Ax) || \
+    defined(STM8AF62Ax)
+ #include "stm8s_adc2.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8AF52Ax) || (STM8AF62Ax) */
+#include "stm8s_awu.h"
+#include "stm8s_beep.h"
+#if defined(STM8S208) || defined(STM8AF52Ax)
+ #include "stm8s_can.h"
+#endif /* (STM8S208) || (STM8AF52Ax) */
+#include "stm8s_clk.h"
+#include "stm8s_exti.h"
+#include "stm8s_flash.h"
+#include "stm8s_gpio.h"
+#include "stm8s_i2c.h"
+#include "stm8s_itc.h"
+#include "stm8s_iwdg.h"
+#include "stm8s_rst.h"
+#include "stm8s_spi.h"
+#include "stm8s_tim1.h"
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) || defined(STM8S001) || defined(STM8S105) || defined(STM8S005) || defined(STM8AF52Ax) || \
+    defined(STM8AF62Ax) || defined(STM8AF626x)
+ #include "stm8s_tim2.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8S103) || (STM8S003) || (STM8S001) || (STM8S105) || (STM8S005) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8AF626x) */
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) || defined(STM8AF52Ax) || defined(STM8AF62Ax) || defined(STM8AF626x)
+ #include "stm8s_tim3.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8S105) || (STM8S005) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8AF626x) */
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) || defined(STM8S001) || defined(STM8S105) || defined(STM8S005) || defined(STM8AF52Ax) || \
+    defined(STM8AF62Ax) || defined(STM8AF626x)
+ #include "stm8s_tim4.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8S103) || (STM8S003) || (STM8S001) || (STM8S105) || (STM8S005) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8AF626x) */
+#if defined(STM8S903) || defined(STM8AF622x)     /* SDCC patch: see https://github.com/tenbaht/sduino/tree/master/STM8S_StdPeriph_Driver */
+ #include "stm8s_tim5.h"
+ #include "stm8s_tim6.h"
+#endif  /* (STM8S903) || (STM8AF622x) */
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) || defined(STM8S001) || defined(STM8S903) || defined(STM8AF52Ax) || defined(STM8AF62Ax)
+ #include "stm8s_uart1.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8S103) || (STM8S003) || (STM8S001) || (STM8S903) || (STM8AF52Ax) || (STM8AF62Ax) */
+#if defined(STM8S105) || defined(STM8S005) || defined(STM8AF626x)
+ #include "stm8s_uart2.h"
+#endif /* (STM8S105) || (STM8S005) || (STM8AF626x) */
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8AF52Ax) || \
+    defined(STM8AF62Ax)
+ #include "stm8s_uart3.h"
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8AF52Ax) || (STM8AF62Ax) */
+#if defined(STM8AF622x)                        /* SDCC patch: see https://github.com/tenbaht/sduino/tree/master/STM8S_StdPeriph_Driver */
+ #include "stm8s_uart4.h"
+#endif /* (STM8AF622x) */      
+#include "stm8s_wwdg.h"
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Uncomment the line below to expanse the "assert_param" macro in the
+   Standard Peripheral Library drivers code */
+#define USE_FULL_ASSERT    (1) 
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef  USE_FULL_ASSERT
+
+/**
+  * @brief  The assert_param macro is used for function's parameters check.
+  * @param expr: If expr is false, it calls assert_failed function
+  *   which reports the name of the source file and the source
+  *   line number of the call that failed.
+  *   If expr is true, it returns no value.
+  * @retval : None
+  */
+#define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+void assert_failed(uint8_t* file, uint32_t line);
+#else
+#define assert_param(expr) ((void)0)
+#endif /* USE_FULL_ASSERT */
+
+#endif /* __STM8S_CONF_H */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/humidity_sensors/app/stm8s_it.c b/humidity_sensors/app/stm8s_it.c
new file mode 100644
index 0000000..5a30096
--- /dev/null
+++ b/humidity_sensors/app/stm8s_it.c
@@ -0,0 +1,522 @@
+#ifndef PROTOS
+/**
+  ******************************************************************************
+  * @file    stm8s_it.c
+  * @author  MCD Application Team
+  * @version V2.2.0
+  * @date    30-September-2014
+  * @brief   Main Interrupt Service Routines.
+  *          This file provides template for all peripherals interrupt service
+  *          routine.
+   ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software
+  * distributed under the License is distributed on an "AS IS" BASIS,
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm8s_it.h"
+
+/** @addtogroup Template_Project
+  * @{
+  */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+/* Public functions ----------------------------------------------------------*/
+/* Public variables ----------------------------------------------------------*/
+
+/*
+extern u8     g_flag1ms;    // flag for 1ms interrupt (for TIM4 ISR)
+extern u32    g_count1ms;   // 1ms counter (for TIM4 ISR)
+*/
+
+
+#ifdef _COSMIC_
+/**
+  * @brief Dummy Interrupt routine
+  * @par Parameters:
+  * None
+  * @retval
+  * None
+*/
+INTERRUPT_HANDLER (NonHandledInterrupt, 25)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /*_COSMIC_*/
+
+/**
+  * @brief TRAP Interrupt routine
+  * @param  None
+  * @retval None
+  */
+#if !defined(_SDCC_) || (SDCC_VERSION >= 30403) /* SDCC patch: traps require >=v3.4.3 */
+INTERRUPT_HANDLER_TRAP (TRAP_IRQHandler)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif
+
+/**
+  * @brief Top Level Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TLI_IRQHandler, 0)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Auto Wake Up Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (AWU_IRQHandler, 1)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Clock Controller Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (CLK_IRQHandler, 2)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief External Interrupt PORTA Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTA_IRQHandler, 3)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief External Interrupt PORTB Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTB_IRQHandler, 4)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief External Interrupt PORTC Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTC_IRQHandler, 5)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief External Interrupt PORTD Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTD_IRQHandler, 6)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief External Interrupt PORTE Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTE_IRQHandler, 7)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+#if defined (STM8S903) || defined (STM8AF622x)
+/**
+  * @brief External Interrupt PORTF Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EXTI_PORTF_IRQHandler, 8)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined (STM8AF52Ax)
+/**
+  * @brief CAN RX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (CAN_RX_IRQHandler, 8)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief CAN TX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (CAN_TX_IRQHandler, 9)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S208) || (STM8AF52Ax) */
+
+/**
+  * @brief SPI Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (SPI_IRQHandler, 10)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Timer1 Update/Overflow/Trigger/Break Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Timer1 Capture/Compare Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM1_CAP_COM_IRQHandler, 12)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+#if defined (STM8S903) || defined (STM8AF622x)
+/**
+  * @brief Timer5 Update/Overflow/Break/Trigger Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM5_UPD_OVF_BRK_TRG_IRQHandler, 13)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Timer5 Capture/Compare Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM5_CAP_COM_IRQHandler, 14)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+#else /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8S103) || (STM8AF62Ax) || (STM8AF52Ax) || (STM8AF626x) */
+/**
+  * @brief Timer2 Update/Overflow/Break Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM2_UPD_OVF_BRK_IRQHandler, 13)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Timer2 Capture/Compare Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM2_CAP_COM_IRQHandler, 14)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) ||  defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8AF626x)
+/**
+  * @brief Timer3 Update/Overflow/Break Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM3_UPD_OVF_BRK_IRQHandler, 15)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief Timer3 Capture/Compare Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM3_CAP_COM_IRQHandler, 16)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8AF62Ax) || (STM8AF52Ax) || (STM8AF626x) */
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined (STM8S003) || defined(STM8S001) || defined (STM8AF62Ax) || defined (STM8AF52Ax) || defined (STM8S903)
+/**
+  * @brief UART1 TX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART1_TX_IRQHandler, 17)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief UART1 RX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART1_RX_IRQHandler, 18)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S208) || (STM8S207) || (STM8S103) || (STM8S001) || (STM8S903) || (STM8AF62Ax) || (STM8AF52Ax) */
+
+#if defined(STM8AF622x)
+/**
+  * @brief UART4 TX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART4_TX_IRQHandler, 17)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief UART4 RX Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART4_RX_IRQHandler, 18)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8AF622x) */
+
+/**
+  * @brief I2C Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (I2C_IRQHandler, 19)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+#if defined(STM8S105) || defined(STM8S005) ||  defined (STM8AF626x)
+/**
+  * @brief UART2 TX interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART2_TX_IRQHandler, 20)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief UART2 RX interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART2_RX_IRQHandler, 21)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S105) || (STM8AF626x) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+/**
+  * @brief UART3 TX interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART3_TX_IRQHandler, 20)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @brief UART3 RX interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (UART3_RX_IRQHandler, 21)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S208) || (STM8S207) || (STM8AF52Ax) || (STM8AF62Ax) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+/**
+  * @brief ADC2 interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (ADC2_IRQHandler, 22)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#else /* STM8S105 or STM8S103 or STM8S903 or STM8AF626x or STM8AF622x */
+/**
+  * @brief ADC1 interrupt routine.
+  * @par Parameters:
+  * None
+  * @retval
+  * None
+  */
+INTERRUPT_HANDLER (ADC1_IRQHandler, 22)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S208) || (STM8S207) || (STM8AF52Ax) || (STM8AF62Ax) */
+
+#if defined (STM8S903) || defined (STM8AF622x)
+/**
+  * @brief Timer6 Update/Overflow/Trigger Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM6_UPD_OVF_TRG_IRQHandler, 23)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#else /* STM8S208 or STM8S207 or STM8S105 or STM8S103 or STM8AF52Ax or STM8AF62Ax or STM8AF626x */
+/**
+  * @brief Timer4 Update/Overflow Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (TIM4_UPD_OVF_IRQHandler, 23)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+#endif /* (STM8S903) || (STM8AF622x) */
+
+/**
+  * @brief Eeprom EEC Interrupt routine.
+  * @param  None
+  * @retval None
+  */
+INTERRUPT_HANDLER (EEPROM_EEC_IRQHandler, 24)
+{
+  /* In order to detect unexpected events during development,
+     it is recommended to set a breakpoint on the following instruction.
+   */
+}
+
+/**
+  * @}
+  */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+#endif
diff --git a/humidity_sensors/app/stm8s_it.h b/humidity_sensors/app/stm8s_it.h
new file mode 100644
index 0000000..0f1636a
--- /dev/null
+++ b/humidity_sensors/app/stm8s_it.h
@@ -0,0 +1,201 @@
+/**
+  ******************************************************************************
+  * @file     stm8s_it.h
+  * @author   MCD Application Team
+  * @version  V2.0.4
+  * @date     26-April-2018
+  * @brief    This file contains the headers of the interrupt handlers
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */ 
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM8S_IT_H
+#define __STM8S_IT_H
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm8s.h"
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+#ifdef _COSMIC_
+ void _stext(void); /* RESET startup routine */
+ INTERRUPT void NonHandledInterrupt(void);
+#endif /* _COSMIC_ */
+
+// SDCC patch: requires separate handling for SDCC (see below)
+#if !defined(_RAISONANCE_) && !defined(_SDCC_)
+ INTERRUPT void TRAP_IRQHandler(void); /* TRAP */
+ INTERRUPT void TLI_IRQHandler(void); /* TLI */
+ INTERRUPT void AWU_IRQHandler(void); /* AWU */
+ INTERRUPT void CLK_IRQHandler(void); /* CLOCK */
+ INTERRUPT void EXTI_PORTA_IRQHandler(void); /* EXTI PORTA */
+ INTERRUPT void EXTI_PORTB_IRQHandler(void); /* EXTI PORTB */
+ INTERRUPT void EXTI_PORTC_IRQHandler(void); /* EXTI PORTC */
+ INTERRUPT void EXTI_PORTD_IRQHandler(void); /* EXTI PORTD */
+ INTERRUPT void EXTI_PORTE_IRQHandler(void); /* EXTI PORTE */
+
+#if defined(STM8S903) || defined(STM8AF622x)		// SDCC patch: add STM8AF622x
+ INTERRUPT void EXTI_PORTF_IRQHandler(void); /* EXTI PORTF */
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined (STM8AF52Ax)
+ INTERRUPT void CAN_RX_IRQHandler(void); /* CAN RX */
+ INTERRUPT void CAN_TX_IRQHandler(void); /* CAN TX/ER/SC */
+#endif /* (STM8S208) || (STM8AF52Ax) */
+
+ INTERRUPT void SPI_IRQHandler(void); /* SPI */
+ INTERRUPT void TIM1_CAP_COM_IRQHandler(void); /* TIM1 CAP/COM */
+ INTERRUPT void TIM1_UPD_OVF_TRG_BRK_IRQHandler(void); /* TIM1 UPD/OVF/TRG/BRK */
+
+#if defined(STM8S903) || defined(STM8AF622x)		// SDCC patch: add STM8AF622x
+ INTERRUPT void TIM5_UPD_OVF_BRK_TRG_IRQHandler(void); /* TIM5 UPD/OVF/BRK/TRG */
+ INTERRUPT void TIM5_CAP_COM_IRQHandler(void); /* TIM5 CAP/COM */
+#else /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8S103) || (STM8S001) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8A626x) */
+ INTERRUPT void TIM2_UPD_OVF_BRK_IRQHandler(void); /* TIM2 UPD/OVF/BRK */
+ INTERRUPT void TIM2_CAP_COM_IRQHandler(void); /* TIM2 CAP/COM */
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) ||  defined (STM8AF52Ax) || defined (STM8AF62Ax) || defined (STM8AF626x)
+ INTERRUPT void TIM3_UPD_OVF_BRK_IRQHandler(void); /* TIM3 UPD/OVF/BRK */
+ INTERRUPT void TIM3_CAP_COM_IRQHandler(void); /* TIM3 CAP/COM */
+#endif /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8A626x) */
+
+#if defined(STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) || defined(STM8S001) || defined(STM8AF52Ax) || defined(STM8AF62Ax) || defined(STM8S903)
+ INTERRUPT void UART1_TX_IRQHandler(void); /* UART1 TX */
+ INTERRUPT void UART1_RX_IRQHandler(void); /* UART1 RX */
+#endif /* (STM8S208) || (STM8S207) || (STM8S007) || (STM8S103) || (STM8S003) || (STM8S001) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8S903) */
+
+#if defined (STM8AF622x)		// SDCC patch: add STM8AF622x
+ INTERRUPT void UART4_TX_IRQHandler(void); /* UART4 TX */
+ INTERRUPT void UART4_RX_IRQHandler(void); /* UART4 RX */
+#endif /* (STM8AF622x) */
+
+ INTERRUPT void I2C_IRQHandler(void); /* I2C */
+
+#if defined(STM8S105) || defined(STM8S005) ||  defined (STM8AF626x)
+ INTERRUPT void UART2_RX_IRQHandler(void); /* UART2 RX */
+ INTERRUPT void UART2_TX_IRQHandler(void); /* UART2 TX */
+#endif /* (STM8S105) || (STM8S005) || (STM8AF626x) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+ INTERRUPT void UART3_RX_IRQHandler(void); /* UART3 RX */
+ INTERRUPT void UART3_TX_IRQHandler(void); /* UART3 TX */
+#endif /* (STM8S207) || (STM8S007) || (STM8S208) || (STM8AF52Ax) || (STM8AF62Ax) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+ INTERRUPT void ADC2_IRQHandler(void); /* ADC2 */
+#else /* (STM8S105) || (STM8S103) || (STM8S903) || (STM8AF622x) */
+ INTERRUPT void ADC1_IRQHandler(void); /* ADC1 */
+#endif /* (STM8S207) || (STM8S007) || (STM8S208) || (STM8AF52Ax) || (STM8AF62Ax) */
+
+#if defined(STM8S903) || defined(STM8AF622x)	// SDCC patch: add STM8AF622x
+ INTERRUPT void TIM6_UPD_OVF_TRG_IRQHandler(void); /* TIM6 UPD/OVF/TRG */
+#else /*STM8S208, STM8S207, STM8S105 or STM8S103 or STM8AF62Ax or STM8AF52Ax or STM8AF626x */
+ INTERRUPT void TIM4_UPD_OVF_IRQHandler(void); /* TIM4 UPD/OVF */
+#endif /* (STM8S903) || (STM8AF622x) */
+ INTERRUPT void EEPROM_EEC_IRQHandler(void); /* EEPROM ECC CORRECTION */
+
+
+// SDCC patch: __interrupt keyword required after function name --> requires new block
+#elif defined (_SDCC_)
+
+ INTERRUPT_HANDLER_TRAP(TRAP_IRQHandler);                 /* TRAP */
+ INTERRUPT_HANDLER(TLI_IRQHandler, 0);                    /* TLI */
+ INTERRUPT_HANDLER(AWU_IRQHandler, 1);                    /* AWU */
+ INTERRUPT_HANDLER(CLK_IRQHandler, 2);                    /* CLOCK */
+ INTERRUPT_HANDLER(EXTI_PORTA_IRQHandler, 3);             /* EXTI PORTA */
+ INTERRUPT_HANDLER(EXTI_PORTB_IRQHandler, 4);             /* EXTI PORTB */
+ INTERRUPT_HANDLER(EXTI_PORTC_IRQHandler, 5);             /* EXTI PORTC */
+// INTERRUPT_HANDLER(EXTI_PORTD_IRQHandler, 6);             /* EXTI PORTD */
+ INTERRUPT_HANDLER(EXTI_PORTE_IRQHandler, 7);             /* EXTI PORTE */
+
+#if defined(STM8S903) || defined(STM8AF622x)
+ INTERRUPT_HANDLER(EXTI_PORTF_IRQHandler, 8);             /* EXTI PORTF */
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined (STM8AF52Ax)
+ INTERRUPT_HANDLER(CAN_RX_IRQHandler, 8);                 /* CAN RX */
+ INTERRUPT_HANDLER(CAN_TX_IRQHandler, 9);                 /* CAN TX/ER/SC */
+#endif /* (STM8S208) || (STM8AF52Ax) */
+
+ INTERRUPT_HANDLER(SPI_IRQHandler, 10);                   /* SPI */
+ INTERRUPT_HANDLER(TIM1_UPD_OVF_TRG_BRK_IRQHandler, 11);  /* TIM1 UPD/OVF/TRG/BRK */
+ INTERRUPT_HANDLER(TIM1_CAP_COM_IRQHandler, 12);          /* TIM1 CAP/COM */
+
+#if defined(STM8S903) || defined(STM8AF622x)
+ INTERRUPT_HANDLER(TIM5_UPD_OVF_BRK_TRG_IRQHandler, 13);  /* TIM5 UPD/OVF/BRK/TRG */
+ INTERRUPT_HANDLER(TIM5_CAP_COM_IRQHandler, 14);          /* TIM5 CAP/COM */
+#else /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8S103) || (STM8S001) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8A626x) */
+ INTERRUPT_HANDLER(TIM2_UPD_OVF_BRK_IRQHandler, 13);      /* TIM2 UPD/OVF/BRK */
+ INTERRUPT_HANDLER(TIM2_CAP_COM_IRQHandler, 14);          /* TIM2 CAP/COM */
+#endif /* (STM8S903) || (STM8AF622x) */
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S105) || \
+    defined(STM8S005) ||  defined (STM8AF52Ax) || defined (STM8AF62Ax) || defined (STM8AF626x)
+ INTERRUPT_HANDLER(TIM3_UPD_OVF_BRK_IRQHandler, 15);      /* TIM3 UPD/OVF/BRK */
+ INTERRUPT_HANDLER(TIM3_CAP_COM_IRQHandler, 16);          /* TIM3 CAP/COM */
+#endif /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8AF52Ax) || (STM8AF62Ax) || (STM8A626x) */
+
+#if defined (STM8S208) || defined(STM8S207) || defined(STM8S007) || defined(STM8S103) || \
+    defined(STM8S003) || defined(STM8S001) || defined (STM8AF52Ax) || defined (STM8AF62Ax) || defined (STM8S903)
+ INTERRUPT_HANDLER(UART1_TX_IRQHandler, 17);              /* UART1 TX */
+ INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18);              /* UART1 RX */
+#endif /* (STM8S208) || (STM8S207) || (STM8S903) || (STM8S103) || (STM8S001) || (STM8AF52Ax) || (STM8AF62Ax) */
+
+#if defined (STM8AF622x)
+ INTERRUPT_HANDLER(UART4_TX_IRQHandler, 17);              /* UART4 TX */
+ INTERRUPT_HANDLER(UART4_RX_IRQHandler, 18);              /* UART4 RX */
+#endif /* (STM8AF622x) */
+ 
+ INTERRUPT_HANDLER(I2C_IRQHandler, 19);                   /* I2C */
+
+#if defined(STM8S105) || defined(STM8S005) ||  defined (STM8AF626x)
+ INTERRUPT_HANDLER(UART2_TX_IRQHandler, 20);              /* UART2 TX */
+ INTERRUPT_HANDLER(UART2_RX_IRQHandler, 21);              /* UART2 RX */
+#endif /* (STM8S105) || (STM8AF626x) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+ INTERRUPT_HANDLER(UART3_RX_IRQHandler, 20);              /* UART3 RX */
+ INTERRUPT_HANDLER(UART3_TX_IRQHandler, 21);              /* UART3 TX */
+#endif /* (STM8S207) || (STM8S208) || (STM8AF62Ax) || (STM8AF52Ax) */
+
+#if defined(STM8S207) || defined(STM8S007) || defined(STM8S208) || defined (STM8AF52Ax) || defined (STM8AF62Ax)
+ INTERRUPT_HANDLER(ADC2_IRQHandler, 22);                  /* ADC2 */
+#else /* (STM8S105) || (STM8S103) || (STM8S903) || (STM8AF622x) */
+ INTERRUPT_HANDLER(ADC1_IRQHandler, 22);                  /* ADC1 */
+#endif /* (STM8S207) || (STM8S208) || (STM8AF62Ax) || (STM8AF52Ax) */
+
+#if defined(STM8S903) || defined(STM8AF622x)
+ INTERRUPT_HANDLER(TIM6_UPD_OVF_TRG_IRQHandler, 23);      /* TIM6 UPD/OVF/TRG */
+#else /* (STM8S208) || (STM8S207) || (STM8S105) || (STM8S103) || (STM8AF62Ax) || (STM8AF52Ax) || (STM8AF626x) */
+ INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23);          /* TIM4 UPD/OVF */
+#endif /* (STM8S903) || (STM8AF622x) */
+ INTERRUPT_HANDLER(EEPROM_EEC_IRQHandler, 24);            /* EEPROM ECC CORRECTION */
+
+#endif /* !(_RAISONANCE_) && !(_SDCC_) */
+
+#endif /* __STM8S_IT_H */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/humidity_sensors/app/uart.c b/humidity_sensors/app/uart.c
new file mode 100644
index 0000000..78eafc4
--- /dev/null
+++ b/humidity_sensors/app/uart.c
@@ -0,0 +1,142 @@
+#include "project.h"
+static void
+_uart_deinit (void)
+{
+  /* Clear the Idle Line Detected bit in the status register by a read
+     to the UART1_SR register followed by a Read to the UART1_DR register */
+  (void) UART1->SR;
+  (void) UART1->DR;
+
+  UART1->BRR2 = UART1_BRR2_RESET_VALUE; /* Set UART1_BRR2 to reset value 0x00 */
+  UART1->BRR1 = UART1_BRR1_RESET_VALUE; /* Set UART1_BRR1 to reset value 0x00 */
+
+  UART1->CR1 = UART1_CR1_RESET_VALUE; /* Set UART1_CR1 to reset value 0x00 */
+  UART1->CR2 = UART1_CR2_RESET_VALUE; /* Set UART1_CR2 to reset value 0x00 */
+  UART1->CR3 = UART1_CR3_RESET_VALUE; /* Set UART1_CR3 to reset value 0x00 */
+  UART1->CR4 = UART1_CR4_RESET_VALUE; /* Set UART1_CR4 to reset value 0x00 */
+  UART1->CR5 = UART1_CR5_RESET_VALUE; /* Set UART1_CR5 to reset value 0x00 */
+
+  UART1->GTR = UART1_GTR_RESET_VALUE;
+  UART1->PSCR = UART1_PSCR_RESET_VALUE;
+}
+
+static void
+_uart_init (u32 BaudRate, UART1_WordLength_TypeDef WordLength,
+            UART1_StopBits_TypeDef StopBits, UART1_Parity_TypeDef Parity,
+            UART1_SyncMode_TypeDef SyncMode, UART1_Mode_TypeDef Mode)
+{
+  u32 BaudRate_Mantissa = 0, BaudRate_Mantissa100 = 0;
+
+  /* Clear the word length bit */
+  UART1->CR1 &= (u8) (~UART1_CR1_M);
+
+  /* Set the word length bit according to UART1_WordLength value */
+  UART1->CR1 |= (u8) WordLength;
+
+  /* Clear the STOP bits */
+  UART1->CR3 &= (u8) (~UART1_CR3_STOP);
+  /* Set the STOP bits number according to UART1_StopBits value  */
+  UART1->CR3 |= (u8) StopBits;
+
+  /* Clear the Parity Control bit */
+  UART1->CR1 &= (u8) (~ (UART1_CR1_PCEN | UART1_CR1_PS));
+  /* Set the Parity Control bit to UART1_Parity value */
+  UART1->CR1 |= (u8) Parity;
+
+  /* Clear the LSB mantissa of UART1DIV  */
+  UART1->BRR1 &= (u8) (~UART1_BRR1_DIVM);
+  /* Clear the MSB mantissa of UART1DIV  */
+  UART1->BRR2 &= (u8) (~UART1_BRR2_DIVM);
+  /* Clear the Fraction bits of UART1DIV */
+  UART1->BRR2 &= (u8) (~UART1_BRR2_DIVF);
+
+  /* Set the UART1 BaudRates in BRR1 and BRR2 registers according to UART1_BaudRate value */
+  BaudRate_Mantissa = ((u32) CLK_GetClockFreq() / (BaudRate << 4));
+  BaudRate_Mantissa100 =
+    (((u32) CLK_GetClockFreq() * 100) / (BaudRate << 4));
+  /* Set the fraction of UART1DIV  */
+  UART1->BRR2 |=
+    (u8) ((u8)
+          (((BaudRate_Mantissa100 -
+             (BaudRate_Mantissa * 100)) << 4) / 100) & (u8) 0x0F);
+  /* Set the MSB mantissa of UART1DIV  */
+  UART1->BRR2 |= (u8) ((BaudRate_Mantissa >> 4) & (u8) 0xF0);
+  /* Set the LSB mantissa of UART1DIV  */
+  UART1->BRR1 |= (u8) BaudRate_Mantissa;
+
+  /* Disable the Transmitter and Receiver before setting the LBCL, CPOL and CPHA bits */
+  UART1->CR2 &= (u8) ~ (UART1_CR2_TEN | UART1_CR2_REN);
+  /* Clear the Clock Polarity, lock Phase, Last Bit Clock pulse */
+  UART1->CR3 &=
+    (u8) ~ (UART1_CR3_CPOL | UART1_CR3_CPHA | UART1_CR3_LBCL);
+  /* Set the Clock Polarity, lock Phase, Last Bit Clock pulse */
+  UART1->CR3 |= (u8) ((u8) SyncMode & (u8) (UART1_CR3_CPOL |
+                      UART1_CR3_CPHA |
+                      UART1_CR3_LBCL));
+
+  if ((u8) (Mode & UART1_MODE_TX_ENABLE)) {
+    /* Set the Transmitter Enable bit */
+    UART1->CR2 |= (u8) UART1_CR2_TEN;
+  } else {
+    /* Clear the Transmitter Disable bit */
+    UART1->CR2 &= (u8) (~UART1_CR2_TEN);
+  }
+
+  if ((u8) (Mode & UART1_MODE_RX_ENABLE)) {
+    /* Set the Receiver Enable bit */
+    UART1->CR2 |= (u8) UART1_CR2_REN;
+  } else {
+    /* Clear the Receiver Disable bit */
+    UART1->CR2 &= (u8) (~UART1_CR2_REN);
+  }
+
+  /* Set the Clock Enable bit, lock Polarity, lock Phase and Last Bit Clock
+     pulse bits according to UART1_Mode value */
+  if ((u8) (SyncMode & UART1_SYNCMODE_CLOCK_DISABLE)) {
+    /* Clear the Clock Enable bit */
+    UART1->CR3 &= (u8) (~UART1_CR3_CKEN);
+  } else
+    UART1->CR3 |= (u8) ((u8) SyncMode & UART1_CR3_CKEN);
+}
+
+void
+uart_tx (u8 d)
+{
+  while (! (UART1->SR & UART1_FLAG_TXE));
+
+  UART1->DR = d;
+}
+
+int
+uart_rx (u8 *d)
+{
+  if (UART1->SR & UART1_FLAG_RXNE) {
+    *d = UART1->DR;
+    return 0;
+  }
+
+  return -1;
+}
+
+
+void
+uart_init (void)
+{
+  CLK_PeripheralClockConfig (CLK_PERIPHERAL_UART1, ENABLE);
+
+  _uart_deinit();
+
+  /* UART1 configuration ------------------------------------------------------ */
+  /* UART1 configured as follow:
+     - BaudRate = 115200 baud
+     - Word Length = 8 Bits
+     - One Stop Bit
+     - No parity
+     - Receive and transmit enabled
+     - UART1 Clock disabled
+   */
+  _uart_init ((u32) 115200, UART1_WORDLENGTH_8D, UART1_STOPBITS_1,
+              UART1_PARITY_NO, UART1_SYNCMODE_CLOCK_DISABLE,
+              UART1_MODE_TXRX_ENABLE);
+
+}
diff --git a/humidity_sensors/app/util.c b/humidity_sensors/app/util.c
new file mode 100644
index 0000000..04a17ae
--- /dev/null
+++ b/humidity_sensors/app/util.c
@@ -0,0 +1,39 @@
+#include "project.h"
+
+#if 0
+void
+assert_failed (u8 *file, u32 line)
+{
+  // avoid compiler warnings
+  (void) file;
+  (void) line;
+
+  /* Infinite loop */
+  while (1) {
+  }
+}
+#endif
+
+void
+delay (__IO u32 n)
+{
+  /* Decrement nCount value */
+  while (n--);
+}
+
+void
+delay_ms (__IO u32 n)
+{
+  while (n--)
+    delay (483);
+}
+
+int
+putchar (int c)
+{
+  if (c == '\n')
+    uart_tx ('\r');
+
+  uart_tx (c);
+  return (c);
+}
diff --git a/humidity_sensors/stm8flash b/humidity_sensors/stm8flash
new file mode 160000
index 0000000..cdafc46
--- /dev/null
+++ b/humidity_sensors/stm8flash
@@ -0,0 +1 @@
+Subproject commit cdafc4638d714ed1a5250cac794b5b28e5cbfa09
-- 
cgit v1.2.3