From 38e55c392163c564121d344db6325e6d4780a406 Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@unormal.org>
Date: Tue, 19 Mar 2013 22:59:04 +0100
Subject: STMPE811 - not tested yet
---
drivers/ginput/touch/STMPE811/ginput_lld_mouse.c | 103 +++++++++------------
.../ginput_lld_mouse_board_embest_dmstf4bb.h | 73 ++++++++++-----
drivers/ginput/touch/STMPE811/stmpe811.h | 6 +-
3 files changed, 98 insertions(+), 84 deletions(-)
(limited to 'drivers')
diff --git a/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c b/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
index bacb1f1f..b2f7ba76 100644
--- a/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
+++ b/drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
@@ -37,38 +37,16 @@
#include "ginput/lld/mouse.h"
-#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
- #include "ginput_lld_mouse_board.h"
-#elif defined(BOARD_EMBEST_DMSTF4BB)
#include "ginput_lld_mouse_board_embest_dmstf4bb.h"
-#else
- #include "ginput_lld_mouse_board_example.h"
-#endif
-static uint16_t sampleBuf[7];
-static coord_t lastx, lasty;
+static coord_t lastx, lasty, lastz;
-/**
- * @brief 7-point median filtering code for touch samples
- *
- * @note This is an internally used routine only.
- *
- * @notapi
- */
-static void filter(void) {
- uint16_t temp;
- int i,j;
-
- for(i = 0; i < 4; i++) {
- for(j = i; j < 7; j++) {
- if(sampleBuf[i] > sampleBuf[j]) {
- /* Swap the values */
- temp = sampleBuf[i];
- sampleBuf[i] = sampleBuf[j];
- sampleBuf[j] = temp;
- }
- }
- }
+/* set the active window of the stmpe811. bl is bottom left, tr is top right */
+static void setActiveWindow(uint16_t bl_x, uint16_t bl_y, uint16_t tr_x, uint16_t tr_y) {
+ write_reg(STMPE811_REG_WDW_TR_X, 2, tr_x);
+ write_reg(STMPE811_REG_WDW_TR_Y, 2, tr_y);
+ write_reg(STMPE811_REG_WDW_BL_X, 2, bl_x);
+ write_reg(STMPE811_REG_WDW_BL_Y, 2, bl_y);
}
/**
@@ -78,6 +56,25 @@ static void filter(void) {
*/
void ginput_lld_mouse_init(void) {
init_board();
+
+ write_reg(STMPE811_REG_SYS_CTRL1, 1, 0x02); // software chip reset
+ write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x04); // temp. sensor clock on, GPIO clock off, touch clock on, ADC clock on
+ write_reg(STMPE811_REG_INT_EN, 1, 0x03); //0x03
+ write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x49); //ADC conversion time = 80 clock ticks, 12-bit ADC, internacl voltage refernce
+
+ chThdSleepMicroseconds(1000);
+
+ write_reg(STMPE811_REG_ADC_CTRL2, 1, 0x01); //ADC speed 3.25MHz
+ write_reg(STMPE811_REG_GPIO_AF, 1, 0x00); //GPIO alternate function - OFF
+ write_reg(STMPE811_REG_TSC_CFG, 1, 0xA3); //avaraging 4, Touch detect delay 1ms, Panel driver settling time 1ms
+ write_reg(STMPE811_REG_FIFO_TH, 1, 0x01); //FIFO trashold =1
+ write_reg(STMPE811_REG_FIFO_STA, 1, 0x01); //FIFO reset enable
+ write_reg(STMPE811_REG_FIFO_STA, 1, 0x00); //FIFO reset disable
+ write_reg(STMPE811_REG_TSC_FRACT_XYZ, 1, 0x07); //Z axis data format
+ write_reg(STMPE811_REG_TSC_I_DRIVE, 1, 0x01); //50mA touchscreen line current
+ write_reg(STMPE811_REG_TSC_CTRL, 1, 0x03); //X&Y only, TSC enable
+ write_reg(STMPE811_REG_INT_STA, 1, 0xFF); //clear all interrupts
+ write_reg(STMPE811_REG_INT_CTRL, 1, 0x01); //level interrupt, enable intrrupts
}
/**
@@ -95,44 +92,29 @@ void ginput_lld_mouse_init(void) {
* @notapi
*/
void ginput_lld_mouse_get_reading(MouseReading *pt) {
- uint16_t i;
+ uint16_t buf;
- // If touch-off return the previous results
- if (!getpin_pressed()) {
+ // if not touched, return the previous results
+ if(!getpin_pressed()) {
pt->x = lastx;
pt->y = lasty;
pt->z = 0;
pt->buttons = 0;
return;
}
-
- // Read the port to get the touch settings
- aquire_bus();
-
- /* Get the X value
- * Discard the first conversion - very noisy and keep the ADC on hereafter
- * till we are done with the sampling. Note that PENIRQ is disabled while reading.
- * Finally switch on PENIRQ once again - perform a dummy read.
- * Once we have the readings, find the medium using our filter function
- */
- read_value(0xD1);
- for(i = 0; i < 7; i++)
- sampleBuf[i] = read_value(0xD1);
- read_value(0xD0);
- filter();
- lastx = (coord_t)sampleBuf[3];
-
- /* Get the Y value using the same process as above */
- read_value(0x91);
- for(i = 0; i < 7; i++)
- sampleBuf[i] = read_value(0x91);
- read_value(0x90);
- filter();
- lasty = (coord_t)sampleBuf[3];
-
- // Release the bus
- release_bus();
-
+
+ /* Get the X value */
+ buf = read_reg(STMPE811_REG_TSC_DATA_X, 2);
+ lastx = (coord_t)(buf);
+
+ /* Get the Y value */
+ buf = read_reg(STMPE811_REG_TSC_DATA_Y, 2);
+ lasty = (coord_t)(buf);
+
+ /* Get the Z value */
+ buf = read_reg(STMPE811_REG_TSC_DATA_Z, 1);
+ lastz = (buf & 0x00FF);
+
// Return the results
pt->x = lastx;
pt->y = lasty;
@@ -142,3 +124,4 @@ void ginput_lld_mouse_get_reading(MouseReading *pt) {
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
/** @} */
+
diff --git a/drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h b/drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
index fa43f4ac..490b8dca 100644
--- a/drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
+++ b/drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
@@ -30,7 +30,7 @@
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
-static const I2CConfig i2ccfg2 = {
+static const I2CConfig i2ccfg = {
OPMODE_I2C,
400000,
FAST_DUTY_CYCLE_2,
@@ -41,12 +41,12 @@ static const I2CConfig i2ccfg2 = {
*
* @notapi
*/
-static inline void init_board(void) {
- palSetPadMode(GPIOC, 13, PAL_MODE_INPUT); /* TP IRQ */
- palSetPadMode(GPIOB, 10, PAL_MODE_ALTERNATE(4)); /* I2C2 SCL */
- palSetPadMode(GPIOB, 11, PAL_MODE_ALTERNATE(4)); /* I2C2 SDA */
+static void init_board(void) {
+ palSetPadMode(GPIOC, 13, PAL_MODE_INPUT | PAL_STM32_PUDR_FLOATING); /* TP IRQ */
+ palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SCL */
+ palSetPadMode(GPIOB, 9, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SDA */
- i2cStart(&I2CD2, &i2ccfg2);
+ i2cStart(&I2CD1, &i2ccfg);
}
/**
@@ -60,34 +60,61 @@ static inline bool_t getpin_pressed(void) {
}
/**
- * @brief Aquire the bus ready for readings
+ * @brief Write a value into a certain register
*
- * @notapi
- */
-static inline void aquire_bus(void) {
- i2cAcquireBus(&I2CD2);
-}
-
-/**
- * @brief Release the bus after readings
+ * @param[in] reg The register address
+ * @param[in] n The amount of bytes (one or two)
+ * @param[in] val The value
*
* @notapi
*/
-static inline void release_bus(void) {
- i2cReleaseBus(&I2CD2);
-}
+static void write_reg(uint8_t reg, uint8_t n, uint16_t val) {
+ uint8_t txbuf[1];
+
+ i2cAcquireBus(&I2CD1);
+
+ txbuf[0] = reg;
+ i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, NULL, 0, MS2ST(STMPE811_TIMEOUT));
+ if(n == 1) {
+ txbuf[0] = val;
+ i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, NULL, 0, MS2ST(STMPE811_TIMEOUT));
+ } else if(n == 3) {
+ txbuf[0] = ((val & 0xFF00) >> 8);
+ txbuf[1] = (val & 0x00FF);
+ i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 2, NULL, 0, MS2ST(STMPE811_TIMEOUT));
+ }
+
+ i2cReleaseBus(&I2CD1);
+}
+
/**
- * @brief Read a value from touch controller
- * @return The value read from the controller
+ * @brief Read the value of a certain register
*
- * params[in] port The controller port to read.
+ * @param[in] reg The register address
+ * @param[in] n The amount of bytes (one or two)
*
* @notapi
*/
-static inline uint16_t read_value(uint16_t port) {
- #error "STMPE811: Implement this driver first!"
+static uint16_t read_reg(uint8_t reg, uint8_t n) {
+ uint8_t txbuf[1], rxbuf[2];
+ uint16_t ret;
+
+ i2cAcquireBus(&I2CD1);
+
+ txbuf[0] = reg;
+ i2cMasterTransmitTimeout(&I2CD1, 0x82 >> 1, txbuf, 1, rxbuf, 2, MS2ST(STMPE811_TIMEOUT));
+
+ i2cReleaseBus(&I2CD1);
+
+ if(n == 1)
+ ret = rxbuf[0];
+ else if (n == 2)
+ ret = ((rxbuf[0] << 8) | (rxbuf[1] & 0xFF));
+
+ return ret;
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */
+
diff --git a/drivers/ginput/touch/STMPE811/stmpe811.h b/drivers/ginput/touch/STMPE811/stmpe811.h
index 8396a844..9da8e1df 100644
--- a/drivers/ginput/touch/STMPE811/stmpe811.h
+++ b/drivers/ginput/touch/STMPE811/stmpe811.h
@@ -29,7 +29,11 @@
#ifndef _STMPE811_H
#define _STMPE811_H
-/* STMPE811 registers */
+// Slave address
+#define STMPE811_ADDR (0x82 >> 1)
+
+// Maximum timeout
+#define STMPE811_TIMEOUT 0x3000
// Identification registers
#define STMPE811_REG_CHP_ID 0x00 // 16-bit
--
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