STM32F030硬件IIC 总是死在while (I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)

hxl0611 · 发表于 2019-10-23 15:27:49

STM32F030R8T6 使用硬件IIC，总是死在while (I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)，不往下执行，使用的板子没有外挂晶振，使用内部时钟，请大神帮忙赐教

void IIC_Init(void)
{

GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;

RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB, ENABLE );
RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE );
RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6| GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_OType=GPIO_OType_OD;
GPIO_Init( GPIOB, &GPIO_InitStructure );

GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_1);

I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DigitalFilter=0;
I2C_InitStructure.I2C_OwnAddress1 = 0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_Timing =0x00901D2B;
I2C_InitStructure.I2C_AnalogFilter=I2C_AnalogFilter_Enable;
I2C_Init( I2C1, &I2C_InitStructure );
I2C_Cmd( I2C1, ENABLE );
}

//*****************************************************
u8 I2C1_ReadByte( u8 id, u8 read_address )
{
u8 data;

   while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET);

I2C_TransferHandling(I2C1, id, 1, I2C_SoftEnd_Mode, I2C_Generate_Start_Write);

while (I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET);

I2C_SendData(I2C1, read_address);

while (I2C_GetFlagStatus(I2C1, I2C_FLAG_TC) == RESET);

I2C_TransferHandling(I2C1, id, 1, I2C_AutoEnd_Mode, I2C_Generate_Start_Read);

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET);

data= I2C_ReceiveData(I2C1);

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET);

I2C_ClearFlag(I2C1, I2C_ICR_STOPCF);

  return data;
}
//*****************************************************
void I2C1_WriteByte( u8 id, u8 write_address, u8 data )
{

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET);

I2C_TransferHandling(I2C1,id, 1, I2C_SoftEnd_Mode,I2C_Generate_Start_Write);

while (I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET);

I2C_SendData(I2C1, write_address);

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TCR) == RESET);

I2C_TransferHandling(I2C1, id, 1, I2C_AutoEnd_Mode, I2C_Generate_Stop);

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET);//if write ok

I2C_SendData(I2C1, data);

while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET);

I2C_ClearFlag(I2C1, I2C_ICR_STOPCF);
}