IIC通讯总在while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));里面-第2页回答

1楼-- · 2019-07-15 00:01

TOPCB 发表于 2019-3-18 17:46
楼主最好贴一下整个过程，从开始到最后的I2C通讯过程。

void RTC_Init(void)
{
I2C_Initial();
PCF8563_Init();
}

void PCF8563_Init(void)
{
I2C_Write(PCF8563_CONTRL_STATE_1,0x00);
I2C_Write(PCF8563_CONTRL_STATE_2,0x00);

I2C_Write(PCF8563_SENCOND_AE_REGISTER,0x80);
I2C_Write(PCF8563_HOUR_AE_REGISTER,0x80);
I2C_Write(PCF8563_DAY_AE_REGISTER,0x80);
I2C_Write(PCF8563_WEEK_AE_REGISTER,0x80);

I2C_Write(PCF8563_TIME_CONTRL,0x82);

I2C_Write(PCF8563_TIME_COUNT_DOWN,0x3C);

I2C_Write(PCF8563_MONTH_REGISTER,0x00);
}
void I2C_Initial(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//------------RTC_SDA->PB_11RTC_SCL->PB_10----------------------------------------
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_Init(GPIOA,&GPIO_InitStructure);
//------------I2C_INIT--------------------------------------------
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = PCF8563_ADDR_W;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_ClockSpeed = I2C_Speed; //400000hz
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

I2C_Init(I2C1,&I2C_InitStructure);
//---------NVIC_INIT----------------------------------------------------

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

I2C_Cmd(I2C1,ENABLE);

}

void I2C_Write(u8 WriteAddr,u8 Dat)
{
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_W,I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2C1,WriteAddr);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_SendData(I2C1,Dat);

while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_GenerateSTOP(I2C1,ENABLE);
}

u8 I2C_Read(u8 ReadAddr)
{
u8 a;
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_W,I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2C1,ReadAddr);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_R,I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

a = I2C_ReceiveData(I2C1);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED))

I2C_AcknowledgeConfig(I2C1,DISABLE);
  I2C_GenerateSTOP(I2C1,ENABLE);

I2C_AcknowledgeConfig(I2C1,ENABLE);

return a;
}

void I2C_Write_nByte(u8 WriteAddr,u8* Dat, u8 NumByte)
{
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_W,I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2C1,WriteAddr);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));

while(NumByte--)
{
I2C_SendData(I2C1,*Dat);
Dat++;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C1,ENABLE);
}

void I2C_Read_nByte(u8 ReadAddr,u8* Buffer,u8 NumByte)
{
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_W,I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

I2C_SendData(I2C1,ReadAddr);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));

I2C_GenerateSTART(I2C1,ENABLE);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));

I2C_Send7bitAddress(I2C1,PCF8563_ADDR_R,I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

while(NumByte)
{
if(NumByte == 1)
{
I2C_AcknowledgeConfig(I2C1,DISABLE);
I2C_GenerateSTOP(I2C1,ENABLE);
}
if(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED))
{
*Buffer = I2C_ReceiveData(I2C1);
Buffer++;
NumByte--;
}

}
I2C_AcknowledgeConfig(I2C1,ENABLE);
}