Communicate with I2C a STM32 and a Raspberry
I want to connect a Raspberry Pi and a STM32F446 via I2C. I want the STM to be the slave. The code on the Raspberry is ok because I am already connected to other devices but when i search for the adress of the STM it doesn't appear. I'm sure the problem is with the init bu can't find it. I attach the code of the init.
Thanks in advance.
void I2C_Init(void){
GPIO_InitTypeDef GPIO_InitStruct;
I2C_InitTypeDef I2C_InitStruct;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C3, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_I2C3); //SCL
GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_I2C3); //SDA
I2C_InitStruct.I2C_Mode = I2C_Mode_SMBusDevice;
I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStruct.I2C_OwnAddress1 = 0x10;
I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStruct.I2C_ClockSpeed = 100000;
I2C_DeInit(I2C3);
I2C_Init(I2C3, &I2C_InitStruct);
I2C_Cmd(I2C3, ENABLE);
}
