Merge pull request stm32duino#2493 from fpistm/7bits_only

fix(wire): support only 7 bits addressing mode

Author: fpistm

Diff for: libraries/Wire/src/Wire.cpp

@@ -104,7 +104,7 @@ void TwoWire::begin(uint8_t address, bool generalCall, bool NoStretchMode)
 
   recoverBus(); // in case I2C bus (device) is stuck after a reset for example
 
-  i2c_custom_init(&_i2c, 100000, I2C_ADDRESSINGMODE_7BIT, ownAddress);
+  i2c_init(&_i2c, 100000, ownAddress);
 
   if (_i2c.isMaster == 0) {
     // i2c_attachSlaveTxEvent(&_i2c, reinterpret_cast<void(*)(i2c_t*)>(&TwoWire::onRequestService));

Diff for: libraries/Wire/src/utility/twi.c

@@ -637,25 +637,14 @@ static uint32_t i2c_getTiming(i2c_t *obj, uint32_t frequency)
   return ret;
 }
 
-/**
-  * @brief  Default init and setup GPIO and I2C peripheral
-  * @param  obj : pointer to i2c_t structure
-  * @retval none
-  */
-void i2c_init(i2c_t *obj)
-{
-  i2c_custom_init(obj, 100000, I2C_ADDRESSINGMODE_7BIT, 0x33);
-}
-
 /**
   * @brief  Initialize and setup GPIO and I2C peripheral
   * @param  obj : pointer to i2c_t structure
   * @param  timing : one of the i2c_timing_e
-  * @param  addressingMode : I2C_ADDRESSINGMODE_7BIT or I2C_ADDRESSINGMODE_10BIT
   * @param  ownAddress : device address
   * @retval none
   */
-void i2c_custom_init(i2c_t *obj, uint32_t timing, uint32_t addressingMode, uint32_t ownAddress)
+void i2c_init(i2c_t *obj, uint32_t timing, uint32_t ownAddress)
 {
   if (obj != NULL) {
 
@@ -771,7 +760,7 @@ void i2c_custom_init(i2c_t *obj, uint32_t timing, uint32_t addressingMode, uint3
 #endif
         handle->Init.OwnAddress1     = ownAddress;
         handle->Init.OwnAddress2     = 0;
-        handle->Init.AddressingMode  = addressingMode;
+        handle->Init.AddressingMode  = I2C_ADDRESSINGMODE_7BIT;
         handle->Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
         handle->Init.GeneralCallMode = (obj->generalCall == 0) ? I2C_GENERALCALL_DISABLE : I2C_GENERALCALL_ENABLE;
         handle->Init.NoStretchMode   = (obj->NoStretchMode == 0) ? I2C_NOSTRETCH_DISABLE : I2C_NOSTRETCH_ENABLE;

Diff for: libraries/Wire/src/utility/twi.h

@@ -137,9 +137,7 @@ typedef enum {
 } i2c_status_e;
 
 /* Exported functions ------------------------------------------------------- */
-void i2c_init(i2c_t *obj);
-void i2c_custom_init(i2c_t *obj, uint32_t timing, uint32_t addressingMode,
-                     uint32_t ownAddress);
+void i2c_init(i2c_t *obj, uint32_t timing, uint32_t ownAddress);
 void i2c_deinit(i2c_t *obj);
 void i2c_setTiming(i2c_t *obj, uint32_t frequency);
 i2c_status_e i2c_master_write(i2c_t *obj, uint8_t dev_address, uint8_t *data, uint16_t size);