ho qualche problema nell'implementazione dell'interfaccia I2C del micro stm32f100.
Questa dovrebbe essere la inizializzazione:
- Codice: Seleziona tutto
#include <stm32f10x.h>
void I2CG_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
// GPIOB clock enable
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
// I2CG clock enable
// I2CG SCL and SDA configuration
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// Enable I2CG reset state
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
// Release I2CG from reset state
RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
I2C_DeInit(I2C1);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 1;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 300;
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
I2C_AcknowledgeConfig(I2C1, ENABLE);
}
int main(){
I2CG_Init();
while(1)
I2C_SendData(I2C1,7);
}
Però andando, con l'oscilloscopio, nei pin PB6 e PB7 non esce niente.
Qulache consiglio? grazie in anticipo