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support I2C2 #469

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Jul 9, 2016
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support I2C2 #469

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6 changes: 4 additions & 2 deletions DeviceCode/Targets/Native/STM32F4/DeviceCode/STM32F4_I2C/STM32F4_i2c_functions.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -165,8 +165,10 @@ BOOL I2C_Internal_Initialize()
currentI2CUnit = NULL;

// set pins to AF4 and open drain
CPU_GPIO_DisablePin( STM32F4_I2C_SDA_PIN, RESISTOR_PULLUP, 0, (GPIO_ALT_MODE)0x43 );
CPU_GPIO_DisablePin( STM32F4_I2C_SCL_PIN, RESISTOR_PULLUP, 0, (GPIO_ALT_MODE)0x43 );
if (STM32F4_I2C_PORT == 2 && STM32F4_I2C_SDA_PIN == 25)//PB9
CPU_GPIO_DisablePin(STM32F4_I2C_SDA_PIN, RESISTOR_PULLUP, 0, (GPIO_ALT_MODE)0x93); //AF9
else
CPU_GPIO_DisablePin(STM32F4_I2C_SDA_PIN, RESISTOR_PULLUP, 0, (GPIO_ALT_MODE)0x43); //AF4

RCC->APB1ENR |= RCC_APB1ENR_I2CxEN; // enable I2C clock
RCC->APB1RSTR = RCC_APB1RSTR_I2CxRST; // reset I2C peripheral
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