I2C. Outdated driver deleted.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3700 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 0 insertions, 1104 deletions

diff --git a/os/hal/platforms/STM32/I2Cv1/i2c_lld.c b/os/hal/platforms/STM32/I2Cv1/i2c_lld.c
deleted file mode 100644
index 1f1664cec..000000000
--- a/os/hal/platforms/STM32/I2Cv1/i2c_lld.c
+++ /dev/null
@@ -1,1104 +0,0 @@
-/*
-    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
-                 2011 Giovanni Di Sirio.
-
-    This file is part of ChibiOS/RT.
-
-    ChibiOS/RT is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 3 of the License, or
-    (at your option) any later version.
-
-    ChibiOS/RT is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/*
-   Concepts and parts of this file have been contributed by Uladzimir Pylinsky
-   aka barthess.
- */
-
-/**
- * @file STM32/i2c_lld.c
- * @brief STM32 I2C subsystem low level driver source. Slave mode not implemented.
- * @addtogroup I2C
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-#include "i2c_lld.h"
-
-#if HAL_USE_I2C || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Datasheet notes.                                                          */
-/*===========================================================================*/
-/**
- * From RM0008.pdf
- *
- * Note:
- * When the STOP, START or PEC bit is set, the software must NOT perform
- * any write access to I2C_CR1 before this bit is cleared by hardware.
- * Otherwise there is a  risk of setting a second STOP, START or PEC request.
- */
-
-/*===========================================================================*/
-/* Driver constants.                                                         */
-/*===========================================================================*/
-#define I2C_STOP_GPT_TIMEOUT  50     /* waiting timer value */
-#define I2C_START_GPT_TIMEOUT 50     /* waiting timer value */
-#define I2C_POLLING_TIMEOUT   0xFFFF
-
-/*===========================================================================*/
-/* Driver exported variables.                                                */
-/*===========================================================================*/
-
-/** @brief I2C1 driver identifier.*/
-#if STM32_I2C_USE_I2C1 || defined(__DOXYGEN__)
-I2CDriver I2CD1;
-#endif
-
-/** @brief I2C2 driver identifier.*/
-#if STM32_I2C_USE_I2C2 || defined(__DOXYGEN__)
-I2CDriver I2CD2;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables.                                                   */
-/*===========================================================================*/
-
-/* Debugging variables */
-#if CH_DBG_ENABLE_ASSERTS
-static volatile uint16_t dbgSR1 = 0;
-static volatile uint16_t dbgSR2 = 0;
-static volatile uint16_t dbgCR1 = 0;
-static volatile uint16_t dbgCR2 = 0;
-#endif /* CH_DBG_ENABLE_ASSERTS */
-
-/* defines for convenience purpose */
-#if I2C_SUPPORTS_CALLBACKS
-#define txBuffp (i2cp->txbuff_p)
-#define rxBuffp (i2cp->rxbuff_p)
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-/*===========================================================================*/
-/* Driver local functions.                                                   */
-/*===========================================================================*/
-#if I2C_SUPPORTS_CALLBACKS
-#if (!(STM32_I2C_I2C1_USE_POLLING_WAIT)) && STM32_I2C_USE_I2C1
-/* I2C1 GPT callback. */
-static void i2c1gptcb(GPTDriver *gptp) {
-  (void)gptp;
-  I2CDriver *i2cp = &I2CD1;
-
-  chSysLockFromIsr();
-  i2cp->flags &= ~I2C_FLG_TIMER_ARMED;
-
-  switch(i2cp->id_state){
-  case I2C_ACTIVE_TRANSMIT:
-    i2c_lld_master_transmit(i2cp, i2cp->slave_addr, i2cp->txbuf, i2cp->txbytes, i2cp->rxbuf, i2cp->rxbytes);
-  break;
-
-  case I2C_ACTIVE_RECEIVE:
-    i2c_lld_master_receive(i2cp, i2cp->slave_addr, i2cp->rxbuf, i2cp->rxbytes);
-  break;
-
-  case I2C_ACTIVE_TRANSCEIVE:
-    i2c_lld_master_transceive(i2cp);
-  break;
-
-  default:
-  break;
-  }
-  chSysUnlockFromIsr();
-}
-/* I2C1 GPT configuration. */
-static const GPTConfig i2c1gptcfg = {
-  1000000,  /* 1MHz timer clock.*/
-  i2c1gptcb    /* Timer callback.*/
-};
-#endif /* STM32_I2C_I2C1_USE_POLLING_WAIT */
-
-#if (!(STM32_I2C_I2C2_USE_POLLING_WAIT)) && STM32_I2C_USE_I2C2
-/* I2C2 GPT callback. */
-static void i2c2gptcb(GPTDriver *gptp) {
-  (void)gptp;
-  I2CDriver *i2cp = &I2CD2;
-
-  chSysLockFromIsr();
-  i2cp->flags &= ~I2C_FLG_TIMER_ARMED;
-
-  switch(i2cp->id_state){
-  case I2C_ACTIVE_TRANSMIT:
-    i2c_lld_master_transmit(i2cp, i2cp->slave_addr, i2cp->txbuf, i2cp->txbytes, i2cp->rxbuf, i2cp->rxbytes);
-  break;
-
-  case I2C_ACTIVE_RECEIVE:
-    i2c_lld_master_receive(i2cp, i2cp->slave_addr, i2cp->rxbuf, i2cp->rxbytes);
-  break;
-
-  case I2C_ACTIVE_TRANSCEIVE:
-    i2c_lld_master_transceive(i2cp);
-  break;
-
-  default:
-  break;
-  }
-  chSysUnlockFromIsr();
-}
-/* I2C2 GPT configuration. */
-static const GPTConfig i2c2gptcfg = {
-  1000000,  /* 1MHz timer clock.*/
-  i2c2gptcb    /* Timer callback.*/
-};
-#endif /* STM32_I2C_I2C2_USE_POLLING_WAIT */
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-/**
- * @brief   Function for I2C debugging purpose.
- * @note    Internal use only.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- *
- * @notapi
- */
-#if CH_DBG_ENABLE_ASSERTS
-void _i2c_unhandled_case(I2CDriver *i2cp){
-  dbgCR1 = i2cp->id_i2c->CR1;
-  dbgCR2 = i2cp->id_i2c->CR2;
-  chDbgAssert((dbgSR1 + dbgSR2) == 0,
-        "i2c_serve_event_interrupt(), #1",
-        "unhandled case");
-}
-#else
-#define _i2c_unhandled_case(i2cp)
-#endif /* CH_DBG_ENABLE_ASSERTS */
-
-#if I2C_SUPPORTS_CALLBACKS
-/**
- * @brief   Return the last event value from I2C status registers.
- * @note    Internal use only.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- *
- * @notapi
- */
-static uint32_t i2c_get_event(I2CDriver *i2cp){
-  uint16_t regSR1 = i2cp->id_i2c->SR1;
-  uint16_t regSR2 = i2cp->id_i2c->SR2;
-  #if CH_DBG_ENABLE_ASSERTS
-    dbgSR1 = regSR1;
-    dbgSR2 = regSR2;
-  #endif /* CH_DBG_ENABLE_ASSERTS */
-
-  return (I2C_EV_MASK & (regSR1 | (regSR2 << 16)));
-}
-
-/**
- * @brief   Handle the flags/interrupts.
- * @note    Internal use only.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- *
- * @notapi
- */
-void _i2c_ev6_master_rec_mode_selected(I2CDriver *i2cp){
-  I2C_TypeDef *dp = i2cp->id_i2c;
-
-  switch(i2cp->flags & EV6_SUBEV_MASK) {
-
-  case I2C_EV6_3_MASTER_REC_1BTR_MODE_SELECTED: /* only an single byte to receive */
-    dp->CR1 &= (uint16_t)~I2C_CR1_ACK;          /* Clear ACK */
-    dp->CR1 |= I2C_CR1_STOP;                    /* Program the STOP */
-    break;
-
-  case I2C_EV6_1_MASTER_REC_2BTR_MODE_SELECTED: /* only two bytes to receive */
-    dp->CR1 &= (uint16_t)~I2C_CR1_ACK;          /* Clear ACK */
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;      /* Disable the ITBUF in order to have only the BTF interrupt */
-    break;
-
-  default: /* more than 2 bytes to receive */
-    break;
-  }
-}
-
-/**
- * @brief   Handle cases of 2 or 3 bytes receiving.
- * @note    Internal use only.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- *
- * @notapi
- */
-void _i2c_ev7_master_rec_byte_qued(I2CDriver *i2cp){
-  I2C_TypeDef *dp = i2cp->id_i2c;
-
-  switch(i2cp->flags & EV7_SUBEV_MASK) {
-
-  case I2C_EV7_2_MASTER_REC_3BYTES_TO_PROCESS:
-    /* Only for case of three bytes to be received.
-     * DataN-2 and DataN-1 already received. */
-    dp->CR1 &= (uint16_t)~I2C_CR1_ACK;  /* Clear ACK */
-    *rxBuffp = dp->DR;                  /* Read the DataN-2. This clear the RXE & BFT flags and launch the DataN exception in the shift register (ending the SCL stretch) */
-    rxBuffp++;
-    chSysLockFromIsr();
-    dp->CR1 |= I2C_CR1_STOP;            /* Program the STOP */
-    *rxBuffp = dp->DR;                  /* Read the DataN-1 */
-    chSysUnlockFromIsr();
-    rxBuffp++;
-    i2cp->rxbytes -= 2;                 /* Decrement the number of readed bytes */
-    i2cp->flags = 0;
-    dp->CR2 |= I2C_CR2_ITBUFEN;         /* ready for read DataN. Enable interrupt for next (and last) RxNE event*/
-    break;
-
-  case I2C_EV7_3_MASTER_REC_2BYTES_TO_PROCESS:
-    /* only for case of two bytes to be received
-     * DataN-1 and DataN are received */
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITEVTEN;
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-    chSysLockFromIsr();
-    dp->CR1 |= I2C_CR1_STOP;                    /* Program the STOP */
-    *rxBuffp = dp->DR;                          /* Read the DataN-1*/
-    rxBuffp++;
-    *rxBuffp = dp->DR;                          /* Read the DataN*/
-    chSysUnlockFromIsr();
-    i2cp->rxbytes = 0;
-    i2cp->flags = 0;
-    _i2c_isr_code(i2cp, i2cp->id_slave_config); /* Portable I2C ISR code defined in the high level driver. */
-    break;
-
-  case I2C_FLG_MASTER_RECEIVER:
-    /* Some times in hi load scenarions it is possible to "miss" interrupt
-     * because STM32 I2C has OR'ed interrupt sources. This case handle that
-     * scenario. */
-    if (i2cp->rxbytes > 3){
-      *rxBuffp = dp->DR;
-      rxBuffp++;
-      (i2cp->rxbytes)--;
-    }
-    else{
-      _i2c_unhandled_case(i2cp);
-    }
-    break;
-
-  default:
-    _i2c_unhandled_case(i2cp);
-    break;
-  }
-}
-
-/**
- * @brief   Main I2C interrupt handler.
- * @note    Internal use only.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- *
- * @notapi
- */
-static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
-  I2C_TypeDef *dp = i2cp->id_i2c;
-
-  switch(i2c_get_event(i2cp)) {
-
-  case I2C_EV5_MASTER_MODE_SELECT:
-    i2cp->flags &= ~I2C_FLG_HEADER_SENT;
-    dp->DR = i2cp->slave_addr1;
-    break;
-
-  case I2C_EV9_MASTER_ADDR_10BIT:
-    if(i2cp->flags & I2C_FLG_MASTER_RECEIVER) {
-      i2cp->slave_addr1 |= 0x01;
-      i2cp->flags |= I2C_FLG_HEADER_SENT;
-    }
-    dp->DR = i2cp->slave_addr2;
-    break;
-
-  /**************************************************************************
-   * Master Transmitter part
-   */
-  case I2C_EV6_MASTER_TRA_MODE_SELECTED:
-    if(i2cp->flags & I2C_FLG_HEADER_SENT){
-      dp->CR1 |= I2C_CR1_START;             /* re-send the start in 10-Bit address mode */
-      break;
-    }
-    txBuffp = (uint8_t*)i2cp->txbuf;        /* Initialize the transmit buffer pointer */
-    i2cp->txbytes--;
-    if(i2cp->txbytes == 0) {                /* If no further data to be sent, disable the I2C ITBUF in order to not have a TxE interrupt */
-      dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-    }
-    dp->DR = *txBuffp;                      /* EV8_1 write the first data */
-    txBuffp++;
-    break;
-
-  case I2C_EV8_MASTER_BYTE_TRANSMITTING:
-    if(i2cp->txbytes > 0) {
-      i2cp->txbytes--;
-      if(i2cp->txbytes == 0) {              /* If no further data to be sent, disable the ITBUF in order to not have a TxE interrupt */
-        dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-      }
-      dp->DR = *txBuffp;
-      txBuffp++;
-    }
-    break;
-
-  case I2C_EV8_2_MASTER_BYTE_TRANSMITTED:
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITEVTEN;        /* Disable ITEVT In order to not have again a BTF IT */
-    if (i2cp->rxbytes == 0){                      /* if nothing to read then generate stop */
-      dp->CR1 |= I2C_CR1_STOP;
-      _i2c_isr_code(i2cp, i2cp->id_slave_config); /* Portable I2C ISR code defined in the high level driver. */
-    }
-    else{                                         /* start reading operation */
-      i2cp->id_i2c->CR1 |= I2C_CR1_START;         /* send start bit */
-      i2c_lld_master_transceive(i2cp);
-    }
-    break;
-
-  /**************************************************************************
-   * Master Receiver part
-   */
-  case I2C_EV6_MASTER_REC_MODE_SELECTED:
-    _i2c_ev6_master_rec_mode_selected(i2cp);
-    rxBuffp = i2cp->rxbuf;                        /* Initialize receive buffer pointer */
-    break;
-
-  case I2C_EV7_MASTER_REC_BYTE_RECEIVED:
-    if(i2cp->rxbytes > 3) {
-      *rxBuffp = dp->DR;                          /* Read the data register */
-      rxBuffp++;
-      i2cp->rxbytes--;
-      if(i2cp->rxbytes == 3){                     /* Disable the ITBUF in order to have only the BTF interrupt */
-        dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-        i2cp->flags |= I2C_FLG_3BTR;
-      }
-    }
-    else if (i2cp->rxbytes == 3){                 /* Disable the ITBUF in order to have only the BTF interrupt */
-      dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-      i2cp->flags |= I2C_FLG_3BTR;
-    }
-    break;
-
-  case I2C_EV7_MASTER_REC_BYTE_QUEUED:
-    _i2c_ev7_master_rec_byte_qued(i2cp);
-    break;
-
-  default:                                        /* only 1 byte must to be read to complete trasfer. Stop already sent to bus. */
-    chDbgAssert((i2cp->rxbytes) == 1,
-          "i2c_serve_event_interrupt(), #1",
-          "more than 1 byte to be received");
-    *rxBuffp = dp->DR;                            /* Read the data register */
-    i2cp->rxbytes = 0;
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITEVTEN;        /* disable interrupts */
-    dp->CR2 &= (uint16_t)~I2C_CR2_ITBUFEN;
-    _i2c_isr_code(i2cp, i2cp->id_slave_config);   /* Portable I2C ISR code defined in the high level driver.*/
-    break;
-  }
-}
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-static void i2c_serve_error_interrupt(I2CDriver *i2cp) {
-  i2cflags_t flags;
-  I2C_TypeDef *reg;
-
-  reg = i2cp->id_i2c;
-  flags = I2CD_NO_ERROR;
-
-  if(reg->SR1 & I2C_SR1_BERR) {                /* Bus error */
-    reg->SR1 &= ~I2C_SR1_BERR;
-    flags |= I2CD_BUS_ERROR;
-  }
-  if(reg->SR1 & I2C_SR1_ARLO) {                /* Arbitration lost */
-    reg->SR1 &= ~I2C_SR1_ARLO;
-    flags |= I2CD_ARBITRATION_LOST;
-  }
-  if(reg->SR1 & I2C_SR1_AF) {                  /* Acknowledge fail */
-    reg->SR1 &= ~I2C_SR1_AF;
-    reg->CR1 |= I2C_CR1_STOP;                  /* setting stop bit */
-    while(i2cp->id_i2c->CR1 & I2C_CR1_STOP)
-      ;
-    flags |= I2CD_ACK_FAILURE;
-  }
-  if(reg->SR1 & I2C_SR1_OVR) {                 /* Overrun */
-    reg->SR1 &= ~I2C_SR1_OVR;
-    flags |= I2CD_OVERRUN;
-  }
-  if(reg->SR1 & I2C_SR1_PECERR) {              /* PEC error */
-    reg->SR1 &= ~I2C_SR1_PECERR;
-    flags |= I2CD_PEC_ERROR;
-  }
-  if(reg->SR1 & I2C_SR1_TIMEOUT) {             /* SMBus Timeout */
-    reg->SR1 &= ~I2C_SR1_TIMEOUT;
-    flags |= I2CD_TIMEOUT;
-  }
-  if(reg->SR1 & I2C_SR1_SMBALERT) {            /* SMBus alert */
-    reg->SR1 &= ~I2C_SR1_SMBALERT;
-    flags |= I2CD_SMB_ALERT;
-  }
-
-  if(flags != I2CD_NO_ERROR) {                /* send communication end signal */
-    chSysLockFromIsr();
-    i2cAddFlagsI(i2cp, flags);
-    chSysUnlockFromIsr();
-  #if I2C_SUPPORTS_CALLBACKS
-    _i2c_isr_err_code(i2cp, i2cp->id_slave_config);
-  #endif /* I2C_SUPPORTS_CALLBACKS */
-  }
-}
-
-
-#if STM32_I2C_USE_I2C1 || defined(__DOXYGEN__)
-/**
- * @brief I2C1 event interrupt handler.
- */
-#if I2C_SUPPORTS_CALLBACKS
-CH_IRQ_HANDLER(VectorBC) {
-
-  CH_IRQ_PROLOGUE();
-  i2c_serve_event_interrupt(&I2CD1);
-  CH_IRQ_EPILOGUE();
-}
-#endif /* I2C_SUPPORTS_CALLBACKS */
-/**
- * @brief I2C1 error interrupt handler.
- */
-CH_IRQ_HANDLER(VectorC0) {
-
-  CH_IRQ_PROLOGUE();
-  i2c_serve_error_interrupt(&I2CD1);
-  CH_IRQ_EPILOGUE();
-}
-#endif /* STM32_I2C_USE_I2C1 */
-
-#if STM32_I2C_USE_I2C2 || defined(__DOXYGEN__)
-/**
- * @brief I2C2 event interrupt handler.
- */
-#if I2C_SUPPORTS_CALLBACKS
-CH_IRQ_HANDLER(VectorC4) {
-
-  CH_IRQ_PROLOGUE();
-  i2c_serve_event_interrupt(&I2CD2);
-  CH_IRQ_EPILOGUE();
-}
-#endif /* I2C_SUPPORTS_CALLBACKS */
-/**
- * @brief I2C2 error interrupt handler.
- */
-CH_IRQ_HANDLER(VectorC8) {
-
-  CH_IRQ_PROLOGUE();
-  i2c_serve_error_interrupt(&I2CD2);
-  CH_IRQ_EPILOGUE();
-}
-#endif /* STM32_I2C_USE_I2C2 */
-
-/**
- * @brief Low level I2C driver initialization.
- */
-void i2c_lld_init(void) {
-
-#if STM32_I2C_USE_I2C1
-  i2cObjectInit(&I2CD1);
-  I2CD1.id_i2c      = I2C1;
-
-#if I2C_SUPPORTS_CALLBACKS
-#if !(STM32_I2C_I2C1_USE_POLLING_WAIT)
-  I2CD1.timer       = &(STM32_I2C_I2C1_USE_GPT_TIM);
-  I2CD1.timer_cfg   = &i2c1gptcfg;
-#endif /* !(STM32_I2C_I2C1_USE_POLLING_WAIT) */
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-#endif /* STM32_I2C_USE_I2C */
-
-#if STM32_I2C_USE_I2C2
-  i2cObjectInit(&I2CD2);
-  I2CD2.id_i2c      = I2C2;
-
-#if I2C_SUPPORTS_CALLBACKS
-#if !(STM32_I2C_I2C2_USE_POLLING_WAIT)
-  I2CD2.timer       = &(STM32_I2C_I2C2_USE_GPT_TIM);
-  I2CD2.timer_cfg   = &i2c2gptcfg;
-#endif /* !(STM32_I2C_I2C2_USE_POLLING_WAIT) */
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-#endif /* STM32_I2C_USE_I2C2 */
-}
-
-/**
- * @brief Configures and activates the I2C peripheral.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- */
-void i2c_lld_start(I2CDriver *i2cp) {
-  if (i2cp->id_state == I2C_STOP) {         /* If in stopped state then enables the I2C clock.*/
-#if STM32_I2C_USE_I2C1
-    if (&I2CD1 == i2cp) {
-#if I2C_SUPPORTS_CALLBACKS
-      nvicEnableVector(I2C1_EV_IRQn,
-          CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
-#endif /* I2C_SUPPORTS_CALLBACKS */
-      nvicEnableVector(I2C1_ER_IRQn,
-          CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
-      rccEnableI2C1(FALSE);
-    }
-#endif
-#if STM32_I2C_USE_I2C2
-    if (&I2CD2 == i2cp) {
-#if I2C_SUPPORTS_CALLBACKS
-      nvicEnableVector(I2C2_EV_IRQn,
-          CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
-#endif /* I2C_SUPPORTS_CALLBACKS */
-      nvicEnableVector(I2C2_ER_IRQn,
-          CORTEX_PRIORITY_MASK(STM32_I2C_I2C1_IRQ_PRIORITY));
-      rccEnableI2C2(FALSE);
-    }
-#endif
-  }
-
-  i2cp->id_i2c->CR1 = I2C_CR1_SWRST;        /* reset i2c peripherial */
-  i2cp->id_i2c->CR1 = 0;
-  i2c_lld_set_clock(i2cp);
-  i2c_lld_set_opmode(i2cp);
-  i2cp->id_i2c->CR1 |= 1;                   /* enable interface */
-}
-
-void i2c_lld_reset(I2CDriver *i2cp){
-  chDbgCheck((i2cp->id_state == I2C_STOP)||(i2cp->id_state == I2C_READY),
-             "i2c_lld_reset: invalid state");
-
-  rccResetI2C1();
-}
-
-
-/**
- * @brief Set clock speed.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- */
-void i2c_lld_set_clock(I2CDriver *i2cp) {
-  volatile uint16_t regCCR, regCR2, freq, clock_div;
-  volatile uint16_t pe_bit_saved;
-  int32_t clock_speed = i2cp->id_config->clock_speed;
-  i2cdutycycle_t duty = i2cp->id_config->duty_cycle;
-
-  chDbgCheck((i2cp != NULL) && (clock_speed > 0) && (clock_speed <= 4000000),
-             "i2c_lld_set_clock");
-
-  /**************************************************************************
-   * CR2 Configuration
-   */
-  regCR2 = i2cp->id_i2c->CR2;                   /* Get the I2Cx CR2 value */
-  regCR2 &= (uint16_t)~I2C_CR2_FREQ;            /* Clear frequency FREQ[5:0] bits */
-  freq = (uint16_t)(STM32_PCLK1 / 1000000);     /* Set frequency bits depending on pclk1 value */
-#ifdef STM32F4XX
-  chDbgCheck((freq >= 2) && (freq <= 42),
-                "i2c_lld_set_clock() : Peripheral clock freq. out of range");
-#else
-  chDbgCheck((freq >= 2) && (freq <= 36),
-              "i2c_lld_set_clock() : Peripheral clock freq. out of range");
-#endif
-  regCR2 |= freq;
-  i2cp->id_i2c->CR2 = regCR2;
-
-  /**************************************************************************
-   * CCR Configuration
-   */
-  pe_bit_saved = (i2cp->id_i2c->CR1 & I2C_CR1_PE);
-  i2cp->id_i2c->CR1 &= (uint16_t)~I2C_CR1_PE;                   /* Disable the selected I2C peripheral to configure TRISE */
-  regCCR = 0;                                                   /* Clear F/S, DUTY and CCR[11:0] bits */
-  clock_div = I2C_CCR_CCR;
-
-  if (clock_speed <= 100000) {                                  /* Configure clock_div in standard mode */
-    chDbgAssert(duty == STD_DUTY_CYCLE,
-                "i2c_lld_set_clock(), #1",
-                "Invalid standard mode duty cycle");
-    clock_div = (uint16_t)(STM32_PCLK1 / (clock_speed * 2));    /* Standard mode clock_div calculate: Tlow/Thigh = 1/1 */
-    if (clock_div < 0x04) clock_div = 0x04;                     /* Test if CCR value is under 0x4, and set the minimum allowed value */
-    regCCR |= (clock_div & I2C_CCR_CCR);                        /* Set clock_div value for standard mode */
-    i2cp->id_i2c->TRISE = freq + 1;                             /* Set Maximum Rise Time for standard mode */
-  }
-  else if(clock_speed <= 400000) {                              /* Configure clock_div in fast mode */
-    chDbgAssert((duty == FAST_DUTY_CYCLE_2) ||
-                (duty == FAST_DUTY_CYCLE_16_9),
-                "i2c_lld_set_clock(), #2",
-                "Invalid fast mode duty cycle");
-    if(duty == FAST_DUTY_CYCLE_2) {
-      clock_div = (uint16_t)(STM32_PCLK1 / (clock_speed * 3));  /* Fast mode clock_div calculate: Tlow/Thigh = 2/1 */
-    }
-    else if(duty == FAST_DUTY_CYCLE_16_9) {
-      clock_div = (uint16_t)(STM32_PCLK1 / (clock_speed * 25)); /* Fast mode clock_div calculate: Tlow/Thigh = 16/9 */
-      regCCR |= I2C_CCR_DUTY;                                   /* Set DUTY bit */
-    }
-    if(clock_div < 0x01) clock_div = 0x01;                      /* Test if CCR value is under 0x1, and set the minimum allowed value */
-    regCCR |= (I2C_CCR_FS | (clock_div & I2C_CCR_CCR));         /* Set clock_div value and F/S bit for fast mode*/
-    i2cp->id_i2c->TRISE = (freq * 300 / 1000) + 1;              /* Set Maximum Rise Time for fast mode */
-  }
-  chDbgAssert((clock_div <= I2C_CCR_CCR),
-      "i2c_lld_set_clock(), #3", "Too low clock clock speed selected");
-
-  i2cp->id_i2c->CCR = regCCR;                                   /* Write to I2Cx CCR */
-  i2cp->id_i2c->CR1 |= pe_bit_saved;                            /* restore the I2C peripheral enabled state */
-}
-
-/**
- * @brief Set operation mode of I2C hardware.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- */
-void i2c_lld_set_opmode(I2CDriver *i2cp) {
-  i2copmode_t opmode = i2cp->id_config->op_mode;
-  uint16_t regCR1;
-
-  regCR1 = i2cp->id_i2c->CR1;             /* Get the I2Cx CR1 value */
-  switch(opmode){
-  case OPMODE_I2C:
-    regCR1 &= (uint16_t)~(I2C_CR1_SMBUS|I2C_CR1_SMBTYPE);
-    break;
-  case OPMODE_SMBUS_DEVICE:
-    regCR1 |= I2C_CR1_SMBUS;
-    regCR1 &= (uint16_t)~(I2C_CR1_SMBTYPE);
-    break;
-  case OPMODE_SMBUS_HOST:
-    regCR1 |= (I2C_CR1_SMBUS|I2C_CR1_SMBTYPE);
-    break;
-  }
-
-  i2cp->id_i2c->CR1 = regCR1;             /* Write to I2Cx CR1 */
-}
-
-/**
- * @brief Set own address.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- */
-void i2c_lld_set_own_address(I2CDriver *i2cp) {
-  /* TODO: dual address mode */
-
-  i2cp->id_i2c->OAR1 |= 1 << 14;
-
-  if (&(i2cp->id_config->own_addr_10) == NULL){       /* only 7-bit address */
-    i2cp->id_i2c->OAR1 &= (~I2C_OAR1_ADDMODE);
-    i2cp->id_i2c->OAR1 |= i2cp->id_config->own_addr_7 << 1;
-  }
-  else {
-    chDbgAssert((i2cp->id_config->own_addr_10 < 1024),
-        "i2c_lld_set_own_address(), #1", "10-bit address longer then 10 bit")
-    i2cp->id_i2c->OAR1 |= I2C_OAR1_ADDMODE;
-    i2cp->id_i2c->OAR1 |= i2cp->id_config->own_addr_10;
-  }
-}
-
-
-/**
- * @brief Deactivates the I2C peripheral.
- *
- * @param[in] i2cp      pointer to the @p I2CDriver object
- */
-void i2c_lld_stop(I2CDriver *i2cp) {
-  if (i2cp->id_state == I2C_READY) {  /* If in ready state then disables the I2C clock.*/
-#if STM32_I2C_USE_I2C1
-    if (&I2CD1 == i2cp) {
-      nvicDisableVector(I2C1_EV_IRQn);
-      nvicDisableVector(I2C1_ER_IRQn);
-      rccDisableI2C1(FALSE);
-    }
-#endif
-#if STM32_I2C_USE_I2C2
-    if (&I2CD2 == i2cp) {
-      nvicDisableVector(I2C2_EV_IRQn);
-      nvicDisableVector(I2C2_ER_IRQn);
-      rccDisableI2C2(FALSE);
-    }
-#endif
-  }
-
-  i2cp->id_state = I2C_STOP;
-}
-
-
-#if I2C_SUPPORTS_CALLBACKS
-/**
- * @brief Transmits data via the I2C bus as master.
- *
- * @param[in] i2cp        pointer to the @p I2CDriver object
- * @param[in] slave_addr  Slave device address. Bits 0-9 contain slave
- *                        device address. Bit 15 must be set to 1 if 10-bit
- *                        addressing modes used. Otherwise	keep it cleared.
- *                        Bits 10-14 unused.
- * @param[in] txbuf       pointer to the transmit buffer
- * @param[in] txbytes     number of bytes to be transmitted
- * @param[in] rxbuf       pointer to the receive buffer
- * @param[in] rxbytes     number of bytes to be received
- */
-void i2c_lld_master_transmit(I2CDriver *i2cp, uint16_t slave_addr,
-    uint8_t *txbuf, size_t txbytes, uint8_t *rxbuf, size_t rxbytes) {
-
-  /* "waiting" for STOP bit routine*/
-  #if STM32_I2C_I2C1_USE_POLLING_WAIT
-    uint32_t timeout = I2C_POLLING_TIMEOUT;
-    while((i2cp->id_i2c->CR1 & I2C_CR1_STOP) && timeout)
-      timeout--;
-    chDbgAssert((timeout > 0), "i2c_lld_master_transmit(), #1", "time to STOP is out");
-  #else
-    chDbgAssert(!(i2cp->flags & I2C_FLG_TIMER_ARMED), "i2c_lld_master_transmit(), #1", "time to STOP is out");
-    if ((i2cp->id_i2c->CR1 & I2C_CR1_STOP) && i2cp->timer != NULL && i2cp->timer_cfg != NULL){
-      chSysLockFromIsr();
-      gptStartOneShotI(i2cp->timer, I2C_STOP_GPT_TIMEOUT);
-      i2cp->flags |= I2C_FLG_TIMER_ARMED;
-      chSysUnlockFromIsr();
-      return;
-    }
-  #endif /* STM32_I2C_I2C1_USE_POLLING_WAIT */
-
-  /* init driver fields */
-  i2cp->slave_addr = slave_addr;
-  i2cp->txbytes = txbytes;
-  i2cp->rxbytes = rxbytes;
-  i2cp->txbuf = txbuf;
-  i2cp->rxbuf = rxbuf;
-
-  /* init address fields */
-  if(slave_addr & 0x8000){                                    /* 10-bit mode used */
-    i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006);          /* add the two msb of 10-bit address to the header */
-    i2cp->slave_addr1 |= 0xF0;                                /* add the header bits with LSB = 0 -> write */
-    i2cp->slave_addr2 = slave_addr & 0x00FF;                  /* the remaining 8 bit of 10-bit address */
-  }
-  else{
-    i2cp->slave_addr1 = ((slave_addr <<1) & 0x00FE);          /* LSB = 0 -> write */
-  }
-
-  /* setting flags and register bits */
-  i2cp->flags = 0;
-  i2cp->errors = 0;
-  i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-  i2cp->id_i2c->CR1 |= I2C_CR1_START;
-  i2cp->id_i2c->CR2 |= (I2C_CR2_ITERREN|I2C_CR2_ITEVTEN|I2C_CR2_ITBUFEN); /* enable ERR, EVT & BUF ITs */
-}
-
-/**
- * @brief Receives data from the I2C bus.
- *
- * @param[in] i2cp        pointer to the @p I2CDriver object
- * @param[in] slave_addr  Slave device address. Bits 0-9 contain slave
- *                        device address. Bit 15 must be set to 1 if 10-bit
- *                        addressing modes used. Otherwise	keep it cleared.
- *                        Bits 10-14 unused.
- * @param[in] rxbuf       pointer to the receive buffer
- * @param[in] rxbytes     number of bytes to be received
- */
-void i2c_lld_master_receive(I2CDriver *i2cp, uint16_t slave_addr,
-    uint8_t *rxbuf, size_t rxbytes){
-
-  chDbgAssert((i2cp->id_i2c->SR1 + i2cp->id_i2c->SR2) == 0,
-        "i2c_lld_master_receive(), #1",
-        "some interrupt sources not clear");
-
-  /* "waiting" for STOP bit routine*/
-  #if STM32_I2C_I2C1_USE_POLLING_WAIT
-    uint32_t timeout = I2C_POLLING_TIMEOUT;
-    while((i2cp->id_i2c->CR1 & I2C_CR1_STOP) && timeout)
-      timeout--;
-    chDbgAssert((timeout > 0), "i2c_lld_master_receive(), #1", "time to STOP is out");
-  #else
-    chDbgAssert(!(i2cp->flags & I2C_FLG_TIMER_ARMED), "i2c_lld_master_receive(), #1", "time to STOP is out");
-    if ((i2cp->id_i2c->CR1 & I2C_CR1_STOP) && i2cp->timer != NULL && i2cp->timer_cfg != NULL){
-      chSysLockFromIsr();
-      gptStartOneShotI(i2cp->timer, I2C_STOP_GPT_TIMEOUT);
-      i2cp->flags |= I2C_FLG_TIMER_ARMED;
-      chSysUnlockFromIsr();
-      return;
-    }
-  #endif /* STM32_I2C_I2C1_USE_POLLING_WAIT */
-
-  /* init driver fields */
-	i2cp->slave_addr = slave_addr;
-	i2cp->rxbytes = rxbytes;
-	i2cp->rxbuf = rxbuf;
-
-	/* init address fields */
-  if(slave_addr & 0x8000){                            /* 10-bit mode used */
-    i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006);  /* add the two msb of 10-bit address to the header */
-    i2cp->slave_addr1 |= 0xF0;                        /* add the header bits (the LSB -> 1 will be add to second */
-    i2cp->slave_addr2 = slave_addr & 0x00FF;          /* the remaining 8 bit of 10-bit address */
-  }
-  else{
-    i2cp->slave_addr1 = ((slave_addr <<1) | 0x01);    /* LSB = 1 -> receive */
-  }
-
-  /* setting flags and register bits */
-  i2cp->flags |= I2C_FLG_MASTER_RECEIVER;
-  i2cp->errors = 0;
-
-  i2cp->id_i2c->CR1 |= I2C_CR1_ACK;                   /* acknowledge returned */
-  i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-
-  if(i2cp->rxbytes == 1) {                            /* Only one byte to be received */
-    i2cp->flags |= I2C_FLG_1BTR;
-  }
-  else if(i2cp->rxbytes == 2) {                       /* Only two bytes to be received */
-    i2cp->flags |= I2C_FLG_2BTR;
-    i2cp->id_i2c->CR1 |= I2C_CR1_POS;                 /* Acknowledge Position */
-  }
-
-  i2cp->id_i2c->CR1 |= I2C_CR1_START;                 /* send start bit */
-  i2cp->id_i2c->CR2 |= (I2C_CR2_ITERREN|I2C_CR2_ITEVTEN|I2C_CR2_ITBUFEN); /* enable ERR, EVT & BUF ITs */
-}
-
-
-/**
- * @brief Realize read-though-write behavior.
- *
- * @param[in] i2cp        pointer to the @p I2CDriver object
- *
- * @notapi
- */
-void i2c_lld_master_transceive(I2CDriver *i2cp){
-
-  chDbgAssert((i2cp != NULL) && (i2cp->slave_addr1 != 0) &&\
-      (i2cp->rxbytes > 0) && (i2cp->rxbuf != NULL),
-      "i2c_lld_master_transceive(), #1",
-      "");
-
-  i2cp->id_state = I2C_ACTIVE_TRANSCEIVE;
-
-  /* "waiting" for START bit routine*/
-  #if STM32_I2C_I2C1_USE_POLLING_WAIT
-    uint32_t timeout = I2C_POLLING_TIMEOUT;
-    while((i2cp->id_i2c->CR1 & I2C_CR1_START) && timeout);
-      timeout--;
-    chDbgAssert((timeout > 0), "i2c_lld_master_transceive(), #1", "time to START is out");
-  #else
-    chDbgAssert(!(i2cp->flags & I2C_FLG_TIMER_ARMED), "i2c_lld_master_transceive(), #1", "time to START is out");
-    if ((i2cp->id_i2c->CR1 & I2C_CR1_START) && i2cp->timer != NULL && i2cp->timer_cfg != NULL){
-      chSysLockFromIsr();
-      gptStartOneShotI(i2cp->timer, I2C_START_GPT_TIMEOUT);
-      i2cp->flags |= I2C_FLG_TIMER_ARMED;
-      chSysUnlockFromIsr();
-      return;
-    }
-  #endif /* STM32_I2C_I2C1_USE_POLLING_WAIT */
-
-  /* init address fields */
-  if(i2cp->slave_addr & 0x8000){                          /* 10-bit mode used */
-    i2cp->slave_addr1 = ((i2cp->slave_addr >>7) & 0x0006);/* add the two msb of 10-bit address to the header */
-    i2cp->slave_addr1 |= 0xF0;                            /* add the header bits (the LSB -> 1 will be add to second */
-    i2cp->slave_addr2 = i2cp->slave_addr & 0x00FF;        /* the remaining 8 bit of 10-bit address */
-  }
-  else{
-    i2cp->slave_addr1 |= 0x01;
-  }
-
-  /* setting flags and register bits */
-  i2cp->flags |= I2C_FLG_MASTER_RECEIVER;
-  i2cp->errors = 0;
-  i2cp->id_i2c->CR1 |= I2C_CR1_ACK;                       /* acknowledge returned */
-  i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-
-  if(i2cp->rxbytes == 1) {                                /* Only one byte to be received */
-    i2cp->flags |= I2C_FLG_1BTR;
-  }
-  else if(i2cp->rxbytes == 2) {                           /* Only two bytes to be received */
-    i2cp->flags |= I2C_FLG_2BTR;
-    i2cp->id_i2c->CR1 |= I2C_CR1_POS;                     /* Acknowledge Position */
-  }
-
-  i2cp->id_i2c->CR2 |= (I2C_CR2_ITERREN|I2C_CR2_ITEVTEN|I2C_CR2_ITBUFEN);  /* enable ERR, EVT & BUF ITs */
-}
-
-#else /*I2C_SUPPORTS_CALLBACKS*/
-
-/**
- * @brief Synchronously transmits data via the I2C bus as master.
- *
- * @param[in] i2cp        pointer to the @p I2CDriver object
- * @param[in] slave_addr  Slave device address. Bits 0-9 contain slave
- *                        device address. Bit 15 must be set to 1 if 10-bit
- *                        addressing modes used. Otherwise  keep it cleared.
- *                        Bits 10-14 unused.
- * @param[in] txbuf       pointer to the transmit buffer
- * @param[in] txbytes     number of bytes to be transmitted
- * @param[in] rxbuf       pointer to the receive buffer
- * @param[in] rxbytes     number of bytes to be received
- */
-void i2c_lld_master_transmit(I2CDriver *i2cp, uint16_t slave_addr,
-    uint8_t *txbuf, size_t txbytes, uint8_t *rxbuf, size_t rxbytes) {
-
-  /* init driver fields */
-  i2cp->slave_addr = slave_addr;
-  i2cp->txbytes = txbytes;
-  i2cp->rxbytes = rxbytes;
-  i2cp->txbuf = txbuf;
-  i2cp->rxbuf = rxbuf;
-
-  /* init address fields */
-  if(slave_addr & 0x8000){                                    /* 10-bit mode used */
-    i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006);          /* add the two msb of 10-bit address to the header */
-    i2cp->slave_addr1 |= 0xF0;                                /* add the header bits with LSB = 0 -> write */
-    i2cp->slave_addr2 = slave_addr & 0x00FF;                  /* the remaining 8 bit of 10-bit address */
-  }
-  else{
-    i2cp->slave_addr1 = ((slave_addr <<1) & 0x00FE);          /* LSB = 0 -> write */
-  }
-
-  i2cp->flags = 0;
-  i2cp->errors = 0;
-  i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-  i2cp->id_i2c->CR2 &= ~I2C_CR2_ITEVTEN;                      /* disable event interrupts */
-  i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN;                       /* enable error interrupts */
-
-  i2cp->id_i2c->CR1 |= I2C_CR1_START;
-  while (!(i2cp->id_i2c->SR1 & I2C_SR1_SB))
-    ;
-  i2cp->id_i2c->DR = i2cp->slave_addr1;
-  while (!(i2cp->id_i2c->SR1 & I2C_SR1_ADDR))
-    ;
-  while (!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY))
-    ;
-  i2cp->id_i2c->DR = *txbuf;
-  txbuf++;
-  i2cp->txbytes--;
-  while(i2cp->txbytes > 0){
-    while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
-      ;
-    i2cp->id_i2c->DR = *txbuf;
-    txbuf++;
-    i2cp->txbytes--;
-  }
-  while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
-    ;
-  if(rxbytes == 0){
-    i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
-    while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
-      ;
-    }
-  else{
-    i2c_lld_master_receive(i2cp, slave_addr, rxbuf, rxbytes);
-  }
-}
-
-
-/**
- * @brief Synchronously receives data from the I2C bus.
- *
- * @param[in] i2cp        pointer to the @p I2CDriver object
- * @param[in] slave_addr  Slave device address. Bits 0-9 contain slave
- *                        device address. Bit 15 must be set to 1 if 10-bit
- *                        addressing modes used. Otherwise  keep it cleared.
- *                        Bits 10-14 unused.
- * @param[in] rxbuf       pointer to the receive buffer
- * @param[in] rxbytes     number of bytes to be received
- */
-void i2c_lld_master_receive(I2CDriver *i2cp, uint16_t slave_addr,
-    uint8_t *rxbuf, size_t rxbytes){
-
-  /* init driver fields */
-  i2cp->slave_addr = slave_addr;
-  i2cp->rxbytes = rxbytes;
-  i2cp->rxbuf = rxbuf;
-
-  /* init address fields */
-  if(slave_addr & 0x8000){                            /* 10-bit mode used */
-    i2cp->slave_addr1 = ((slave_addr >>7) & 0x0006);  /* add the two msb of 10-bit address to the header */
-    i2cp->slave_addr1 |= 0xF0;                        /* add the header bits (the LSB -> 1 will be add to second */
-    i2cp->slave_addr2 = slave_addr & 0x00FF;          /* the remaining 8 bit of 10-bit address */
-  }
-  else{
-    i2cp->slave_addr1 = ((slave_addr <<1) | 0x01);    /* LSB = 1 -> receive */
-  }
-
-
-  /* setting flags and register bits */
-  i2cp->flags = 0;
-  i2cp->errors = 0;
-  i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-  i2cp->id_i2c->CR2 &= ~I2C_CR2_ITEVTEN;              /* disable event interrupts */
-  i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN;               /* enable error interrupts */
-
-  i2cp->id_i2c->CR1 |= I2C_CR1_START;
-  while (!(i2cp->id_i2c->SR1 & I2C_SR1_SB))
-    ;
-
-  i2cp->id_i2c->DR = i2cp->slave_addr1;
-  while (!(i2cp->id_i2c->SR1 & I2C_SR1_ADDR))
-    ;
-
-  if(i2cp->rxbytes >= 3){                             /* more than 2 bytes receiving procedure */
-    while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY))        /* to clear ADDR bit */
-      ;
-    while(i2cp->rxbytes > 3){
-      while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
-        ;
-      *rxbuf = i2cp->id_i2c->DR;
-      rxbuf++;
-      i2cp->rxbytes--;
-    }
-    while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))          /* stopping procedure */
-      ;
-    i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
-    chSysLock();
-    i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
-    *rxbuf = i2cp->id_i2c->DR;
-    rxbuf++;
-    i2cp->rxbytes--;
-    chSysUnlock();
-    while(!(i2cp->id_i2c->SR1 & I2C_SR1_RXNE))
-      ;
-    *rxbuf = i2cp->id_i2c->DR;
-    rxbuf++;
-    i2cp->rxbytes--;
-    while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
-      ;
-    i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
-  }
-  else{                                                 /* 1 or 2 bytes receiving procedure */
-    if(i2cp->rxbytes == 2){
-      i2cp->id_i2c->CR1 |= I2C_CR1_POS;
-      chSysLock();
-      while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY))        /* to clear ADDR bit */
-        ;
-      i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
-      chSysUnlock();
-      while(!(i2cp->id_i2c->SR1 & I2C_SR1_BTF))
-        ;
-      chSysLock();
-      i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
-      *rxbuf = i2cp->id_i2c->DR;
-      rxbuf++;
-      i2cp->rxbytes--;
-      chSysUnlock();
-      *rxbuf = i2cp->id_i2c->DR;
-      rxbuf++;
-      i2cp->rxbytes--;
-      while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
-        ;
-      i2cp->id_i2c->CR1 &= ~I2C_CR1_POS;
-      i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
-    }
-    else{ /* 1 byte */
-      i2cp->id_i2c->CR1 &= ~I2C_CR1_ACK;
-      chSysLock();
-      while(!(i2cp->id_i2c->SR2 & I2C_SR2_BUSY))       /* to clear ADDR bit */
-        ;
-      i2cp->id_i2c->CR1 |= I2C_CR1_STOP;
-      chSysUnlock();
-      while(!(i2cp->id_i2c->SR1 & I2C_SR1_RXNE))
-        ;
-      *rxbuf = i2cp->id_i2c->DR;
-      rxbuf++;
-      i2cp->rxbytes--;
-      while (i2cp->id_i2c->CR1 & I2C_CR1_STOP)
-        ;
-      i2cp->id_i2c->CR1 |= I2C_CR1_ACK;
-    }
-  }
-}
-#endif /* I2C_SUPPORTS_CALLBACKS */
-
-#undef rxBuffp
-#undef txBuffp
-
-#endif /* HAL_USE_I2C */