3 files changed, 18 insertions, 10 deletions

diff --git a/os/hal/include/i2c.h b/os/hal/include/i2c.h
index 53f4cd86a..3f9186125 100644
--- a/os/hal/include/i2c.h
+++ b/os/hal/include/i2c.h
@@ -161,8 +161,6 @@ struct I2CSlaveConfig{
    */

   uint16_t              address;

 

-  //TODO: (is it need?) merge rw_bit, restart and address in one 16-bit variable.

-  uint8_t               rw_bit;

   bool_t                restart;    // send restart if TRUE. Else sent stop event after complete data tx/rx

 

 

diff --git a/os/hal/platforms/STM32/i2c_lld.c b/os/hal/platforms/STM32/i2c_lld.c
index 804246b2d..94c3c0da3 100644
--- a/os/hal/platforms/STM32/i2c_lld.c
+++ b/os/hal/platforms/STM32/i2c_lld.c
@@ -124,7 +124,7 @@ static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
 
     if(!(i2cp->id_slave_config->address & 0x8000)){ // slave address is 7-bit
       i2cp->id_i2c->DR = ((i2cp->id_slave_config->address & 0x7F) << 1) |
-                        i2cp->id_slave_config->rw_bit;
+                        i2cp->rw_bit;
       i2cp->id_state = I2C_MWAIT_ADDR_ACK;
       return;
     }
@@ -139,7 +139,7 @@ static void i2c_serve_event_interrupt(I2CDriver *i2cp) {
   // "wait" interrupt with ADD10 flag
   if ((i2cp->id_state == I2C_10BIT_HANDSHAKE) && (i2cp->id_i2c->SR1 & I2C_SR1_ADD10)){
     i2cp->id_i2c->DR = i2cp->id_slave_config->address & 0x00FF; // send remaining bits of address
-    if (!(i2cp->id_slave_config->rw_bit))
+    if (!(i2cp->rw_bit))
       // in transmit mode there is nothing to do with 10-bit handshaking
       i2cp->id_state = I2C_MWAIT_ADDR_ACK;
     return;
@@ -310,7 +310,7 @@ void i2c_lld_start(I2CDriver *i2cp) {
 
   i2c_lld_set_clock(i2cp);
   i2c_lld_set_opmode(i2cp);
-  i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN | I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN;
+  i2cp->id_i2c->CR2 |= I2C_CR2_ITERREN | I2C_CR2_ITEVTEN | I2C_CR2_ITBUFEN;// enable interrupts
   i2cp->id_i2c->CR1 |= 1; // enable interface
 }
 
@@ -477,7 +477,7 @@ void i2c_lld_master_stop(I2CDriver *i2cp){
 void i2c_lld_master_transmit(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
 
   i2cp->id_slave_config = i2cscfg;
-  i2cp->id_slave_config->rw_bit = I2C_WRITE;
+  i2cp->rw_bit = I2C_WRITE;
 
   // generate start condition. Later transmission goes in background
   i2c_lld_master_start(i2cp);
@@ -486,7 +486,7 @@ void i2c_lld_master_transmit(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
 void i2c_lld_master_receive(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
 
   i2cp->id_slave_config = i2cscfg;
-  i2cp->id_slave_config->rw_bit = I2C_READ;
+  i2cp->rw_bit = I2C_READ;
 
   // generate (re)start condition. Later connection goes asynchronously
   i2c_lld_master_start(i2cp);
@@ -495,7 +495,7 @@ void i2c_lld_master_receive(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg){
 
 
 /**
- * @brief Transmits data ever the I2C bus as masteri2cp.
+ * @brief Transmits data via I2C bus.
  *
  * @note  This function does not use interrupts
  *
@@ -508,7 +508,7 @@ void i2c_lld_master_transmit_NI(I2CDriver *i2cp, I2CSlaveConfig *i2cscfg, bool_t
   int i = 0;
 
   i2cp->id_slave_config = i2cscfg;
-  i2cp->id_slave_config->rw_bit = I2C_WRITE;
+  i2cp->rw_bit = I2C_WRITE;
 
 
   i2cp->id_i2c->CR1 |= I2C_CR1_START; // generate start condition
diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h
index 9787360fd..76f7068e2 100644
--- a/os/hal/platforms/STM32/i2c_lld.h
+++ b/os/hal/platforms/STM32/i2c_lld.h
@@ -116,6 +116,12 @@ struct I2CDriver{
    * @brief Driver state.
    */
   i2cstate_t            id_state;
+#if I2C_USE_WAIT
+  /**
+   * @brief Thread waiting for I/O completion.
+   */
+  Thread                *thread;
+#endif /* I2C_USE_WAIT */
 #if I2C_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
 #if CH_USE_MUTEXES || defined(__DOXYGEN__)
   /**
@@ -134,8 +140,12 @@ struct I2CDriver{
    * @brief Current slave configuration data.
    */
   I2CSlaveConfig        *id_slave_config;
+  /**
+   * @brief RW-bit sent to slave.
+   */
+  uint8_t               rw_bit;
 
-  /* End of the mandatory fields.*/
+  /*********** End of the mandatory fields. **********************************/
 
   /**
    * @brief Pointer to the I2Cx registers block.