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发表于 2017-3-11 09:04:47
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本帖最后由 godsend 于 2017-3-11 09:06 编辑
uint8_t I2C1_TransferFlag = 0;
uint8_t I2C1_Step = 0;
uint8_t I2C1_Mode = 0;
uint8_t I2C1_DeviceAddress = 0;
uint8_t I2C1_RegisterAddress = 0;
uint8_t I2C1_DeviceMeneyType = 0;
uint8_t I2C1_DataLength = 0;
uint8_t I2C1_RxBuff[I2C1_RxMax];
uint8_t I2C1_TxBuff[I2C1_TxMax];
void I2C1_InitStructure(void)
{
I2C_InitTypeDef I2C1_InitSturcture;
DMA_InitTypeDef DMA_InitStrecture;
I2C_DeInit(I2C1);
DMA_DeInit(DMA1_Stream0);
DMA_DeInit(DMA1_Stream6);
I2C1_InitSturcture.I2C_ClockSpeed = 100000;
I2C1_InitSturcture.I2C_Mode = I2C_Mode_I2C;
I2C1_InitSturcture.I2C_DutyCycle = I2C_DutyCycle_2;
I2C1_InitSturcture.I2C_OwnAddress1 = 0x00;
I2C1_InitSturcture.I2C_Ack = I2C_Ack_Enable;
I2C1_InitSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_ITConfig(I2C1, I2C_IT_EVT|I2C_IT_ERR, ENABLE);
I2C_Init(I2C1, &I2C1_InitSturcture);
I2C_DMACmd(I2C1, ENABLE);
I2C_Cmd(I2C1, ENABLE);
DMA_InitStrecture.DMA_Channel = DMA_Channel_1;//I2C1_RX
DMA_InitStrecture.DMA_PeripheralBaseAddr = (uint32_t)(&(I2C1->DR));
DMA_InitStrecture.DMA_Memory0BaseAddr = (uint32_t)I2C1_RxBuff;
DMA_InitStrecture.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStrecture.DMA_BufferSize = I2C1_RxMax;
DMA_InitStrecture.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStrecture.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStrecture.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStrecture.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStrecture.DMA_Mode = DMA_Mode_Normal;
DMA_InitStrecture.DMA_Priority = DMA_Priority_High;
DMA_InitStrecture.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStrecture.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStrecture.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStrecture.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
//DMA_ITConfig(DMA1_Stream0, DMA_IT_TC, ENABLE);
DMA_ITConfig(DMA1_Stream0, DMA_IT_HT, ENABLE);
DMA_Init(DMA1_Stream0, &DMA_InitStrecture);
DMA_Cmd(DMA1_Stream0, DISABLE);
}
void I2C1_SendData(uint8_t DeviceAddress, uint16_t RegisterAddress, uint8_t DeviceMeneyType, uint8_t DataLength)
{
if(!I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY))
{
I2C1_TransferFlag = 1;
I2C_ClearFlag(I2C1, I2C_FLAG_BUSY);
I2C_ClearFlag(I2C1, I2C_FLAG_BERR);
I2C1_Step = 0;
I2C1_Mode = I2C1_WriteMode;
I2C1_DeviceAddress = DeviceAddress;
I2C1_RegisterAddress = RegisterAddress;
I2C1_DataLength = DataLength;
I2C_AcknowledgeConfig(I2C1, ENABLE);
I2C_GenerateSTART(I2C1, ENABLE);
}
}
void I2C1_ReceiveData(uint8_t DeviceAddress, uint16_t RegisterAddress, uint8_t DeviceMeneyType, uint8_t DataLength)
{
if(!I2C1_TransferFlag)
{
if(!I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY))
{
I2C1_TransferFlag = 1;
I2C1_Step = 0;
I2C1_Mode = I2C1_ReadMode;
I2C1_DeviceAddress = DeviceAddress;
I2C1_RegisterAddress = RegisterAddress;
I2C1_DeviceMeneyType = DeviceMeneyType;
I2C1_DataLength = DataLength;
I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
I2C_ITConfig(I2C1, I2C_IT_EVT|I2C_IT_ERR, ENABLE);
I2C_GenerateSTART(I2C1, ENABLE);
}
}
}
void I2C1_EV_IRQHandler(void)
{
LastEven = I2C_GetLastEvent(I2C1);
if(I2C1_Mode == I2C1_ReadMode)
{
switch(LastEven)
{
case I2C_EVENT_MASTER_MODE_SELECT:
if(I2C1_Step == 0)
{
I2C_Send7bitAddress(I2C1, I2C1_DeviceAddress, I2C_Direction_Transmitter);
}
if(I2C1_DeviceMeneyType == I2C1_MeneyType8)
{
if(I2C1_Step == 4)
{
I2C_Send7bitAddress(I2C1, I2C1_DeviceAddress, I2C_Direction_Receiver);
}
}
else
{
if(I2C1_Step == 5)
{
I2C_Send7bitAddress(I2C1, I2C1_DeviceAddress, I2C_Direction_Receiver);
}
}
I2C1_Step++;
break;
case I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED:
I2C_SendData(I2C1, ((uint8_t) (I2C1_RegisterAddress)));
I2C1_Step++;
break;
case I2C_EVENT_MASTER_BYTE_TRANSMITTED:
if(I2C1_DeviceMeneyType == I2C1_MeneyType8)
{
if(I2C1_Step == 3)
{
I2C_GenerateSTART(I2C1, ENABLE);
}
else
{
//I2C_SendData(I2C1, RegisterAddress);
}
}
else
{
if(I2C1_Step == 3)
{
I2C_SendData(I2C1, ((uint8_t) (I2C1_RegisterAddress >> 8)));
}
if(I2C1_Step == 4)
{
I2C_GenerateSTART(I2C1, ENABLE);
}
I2C1_Step++;
break;
case I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED:
DMA_ClearITPendingBit(DMA1_Stream0, DMA_IT_HTIF0);
DMA_ClearITPendingBit(DMA1_Stream0, DMA_IT_TCIF0);
DMA_ITConfig(DMA1_Stream0, DMA_IT_HT, ENABLE);
DMA_ITConfig(DMA1_Stream0, DMA_IT_TC, ENABLE);
DMA_SetCurrDataCounter(DMA1_Stream0, I2C1_DataLength*2);
DMA_Cmd(DMA1_Stream0, ENABLE);
I2C_ITConfig(I2C1, I2C_IT_EVT, DISABLE);
I2C1_Step++;
break;
default:I2C1_Step = 0; break;
}
}
}
if(I2C1_Mode == I2C1_WriteMode)
{
}
}
void I2C1_ER_IRQHandler(void)
{
if(I2C_GetITStatus(I2C1, I2C_IT_TIMEOUT))
{
I2C_ClearITPendingBit(I2C1, I2C_IT_TIMEOUT);
}
if(I2C_GetITStatus(I2C1, I2C_IT_PECERR))
{
I2C_ClearITPendingBit(I2C1, I2C_IT_PECERR);
}
if(I2C_GetITStatus(I2C1, I2C_IT_AF))
{
I2C_ClearITPendingBit(I2C1, I2C_IT_AF);
}
if(I2C_GetITStatus(I2C1, I2C_IT_BERR))
{
I2C_ClearITPendingBit(I2C1, I2C_IT_BERR);
}
I2C_GenerateSTOP(I2C1, ENABLE);
}
程序就是这个样子，只写了8位地址，16位的没有写。你看看有什么不对的地方还请支出共同学习。 |
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