我使用STM32F4板作为从接收器，北欧板作为主发射器。我能够发送从机地址为 0x30，这是从机确认的，我将设备寄存器地址发送为 0x10，然后我使用发送一些数据
i2c_write(0x30, 0x10, data, 4);
我能够在我的中断服务程序中获取事件。我收到了“I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED”的 0x00020002。然后我收到 0x00020044 事件并且时钟停止运行。谁能帮我解决这个问题。通过范围界定，我在示波器上看到了从地址、设备寄存器地址和我的第一个带有时钟的数据。但在那之后时钟停止了。
我可以将 STM32F4 用作主发射器并读取一些传感器，但我发现很难将 STM32F4 用作从接收器，将北欧板用作主发射器
void i2c_init2()
{
GPIO_InitTypeDef gpio_init;
I2C_InitTypeDef i2c_init;
NVIC_InitTypeDef NVIC_InitStructure, NVIC_InitStructure2;
I2C_DeInit(I2C2 ); //Deinit and reset the I2C to avoid it locking up
I2C_SoftwareResetCmd(I2C2, ENABLE);
I2C_SoftwareResetCmd(I2C2, DISABLE);
/*!< I2C Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
/* setup SCL and SDA pins
* SCL on PB10 and SDA on PB11
*/
gpio_init.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11; // we are going to use PB10 and PB11
gpio_init.GPIO_Mode = GPIO_Mode_AF; // set pins to alternate function
gpio_init.GPIO_Speed = GPIO_Speed_50MHz; // set GPIO speed
gpio_init.GPIO_PuPd = GPIO_PuPd_UP; //Pull up resistor
gpio_init.GPIO_OType = GPIO_OType_OD; //Open Drain
GPIO_Init(GPIOB, &gpio_init);
// Connect I2C2 pins to AF
GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_I2C2 ); // SCL
GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_I2C2 ); // SDA
/* Configure the Priority Group to 1 bit */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = I2C2_EV_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure2.NVIC_IRQChannel = I2C2_ER_IRQn;
NVIC_InitStructure2.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure2.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure2.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure2);
I2C_ITConfig(I2C2, I2C_IT_EVT, ENABLE);
I2C_ITConfig(I2C2, I2C_IT_ERR, ENABLE);
I2C_ITConfig(I2C2, I2C_IT_BUF, ENABLE);
i2c_init.I2C_ClockSpeed = 100000;
i2c_init.I2C_Mode = I2C_Mode_I2C;
i2c_init.I2C_DutyCycle = I2C_DutyCycle_2;
i2c_init.I2C_OwnAddress1 = 0x30;
i2c_init.I2C_Ack = I2C_Ack_Enable;
i2c_init.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_Init(I2C2, &i2c_init);
I2C_StretchClockCmd(I2C2, ENABLE);
I2C_Cmd(I2C2, ENABLE);
}
void I2C2_ER_IRQHandler(void)
{
/* Read SR1 register to get I2C error */
if ((I2C_ReadRegister(I2C2, I2C_Register_SR1 ) & 0xFF00) != 0x00)
{
STM_EVAL_LEDOn(LED6);
/* Clears error flags */
I2C2 ->SR1 &= 0x00FF;
}
}
void I2C2_EV_IRQHandler(void)
{
uint8_t dataRX;
Event = I2C_GetLastEvent(I2C2 );
printf("Event: 0x%x\n", Event);
switch (Event)
{
case I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED :
{
printf("Slave Address Matched\n");
STM_EVAL_LEDOn(LED4);
I2C2 ->SR1;
I2C2 ->SR2;
break;
}
case I2C_EVENT_SLAVE_BYTE_RECEIVED :
{
printf("Slave Byte Received\n");
dataRX = I2C_ReceiveData(I2C2 );
break;
}
case I2C_EVENT_SLAVE_ACK_FAILURE :
{
STM_EVAL_LEDOn(LED3);
I2C2 ->SR1 &= 0x00FF;
break;
}
case I2C_EVENT_SLAVE_STOP_DETECTED :
{
I2C2 ->SR1;
I2C2 ->CR1 |= 0x1;
break;
}
}
}