bool i2cRead(uint8_t addr, uint8_t reg, uint8_t len, uint8_t *buf)
{
if (!I2C_Start())
return false;
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_Start();
I2C_SendByte(addr << 1 | I2C_Direction_Receiver);
I2C_WaitAck();
while (len) {
*buf = I2C_ReceiveByte();
if (len == 1)
I2C_NoAck();
else
I2C_Ack();
buf++;
len--;
}
I2C_Stop();
return true;
}
bool i2cRead(I2CDevice device, uint8_t addr, uint8_t reg, uint8_t len, uint8_t *buf)
{
UNUSED(device);
if (!I2C_Start()) {
return false;
}
I2C_SendByte(addr << 1 | I2C_Direction_Transmitter);
if (!I2C_WaitAck()) {
I2C_Stop();
i2cErrorCount++;
return false;
}
I2C_SendByte(reg);
I2C_WaitAck();
I2C_Start();
I2C_SendByte(addr << 1 | I2C_Direction_Receiver);
I2C_WaitAck();
while (len) {
*buf = I2C_ReceiveByte();
if (len == 1) {
I2C_NoAck();
}
else {
I2C_Ack();
}
buf++;
len--;
}
I2C_Stop();
return true;
}
void HAL_I2C_Ack(void)
{
#ifdef USE_I2C_OLD
I2C_Ack();
#else
IIC_Ack();
#endif
}
void i2c_init(void)
{
I2C->FREQR=0x0f; //设置频率寄存器
I2C->CCRH=0x00; //设置始终寄存器高位
I2C->CCRL=0x50; //设置始终寄存器低位
I2C->TRISER=0x11; //设置最大SCL上升时间
I2C->CR1|=0x01; //使能I2C模块
I2C_Ack(); //设置匹配应答
I2C->CR2|=0x08; //设置接收应答
}
/*******************************************************************************
* Function Name : I2C_ReadByte
* Description : 读取一串数据
* Input : - pBuffer: 存放读出数据
* - length: 待读出长度
* - ReadAddress: 待读出地址
* - DeviceAddress: 器件类型
* Output : None
* Return : 返回为:=1成功读入,=0失败
* Attention : None
*******************************************************************************/
int I2C_ReadByte(uint8_t* pBuffer, uint16_t length, uint8_t ReadAddress, uint8_t DeviceAddress)
{
if(!I2C_Start())
{
return DISABLE;
}
I2C_SendByte( DeviceAddress ); /* 器件地址 */
if( !I2C_WaitAck() )
{
I2C_Stop();
return DISABLE;
}
I2C_SendByte( ReadAddress ); /* 设置低起始地址 */
I2C_WaitAck();
I2C_Stop();
if(!I2C_Start())
{
return DISABLE;
}
I2C_SendByte( DeviceAddress + 1 ); /* 器件地址 */
if(!I2C_WaitAck())
{
I2C_Stop();
return DISABLE;
}
while(length)
{
*pBuffer = I2C_ReceiveByte();
if(length == 1)
{
I2C_NoAck();
}
else
{
I2C_Ack();
}
pBuffer++;
length--;
}
I2C_Stop();
return ENABLE;
}
//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
uint8_t I2C_Read_Byte(unsigned char ack)
{
unsigned char i,receive=0;
SDA_IN();//SDA设置为输入
for(i=0;i<8;i++ )
{
I2C_SCL=0;
Delay_NOP_us(2);
I2C_SCL=1;
receive<<=1;
if(SDA_Read)receive++;
Delay_NOP_us(1);
}
if (!ack)
I2C_NAck();//发送nACK
else
I2C_Ack(); //发送ACK
return receive;
}
/**
* @brief I2C read mutiple data
* \param[in] instance instance of i2c moudle
* \param[in] chipAddr i2c slave addr
* \param[in] addr i2c slave register offset
* \param[in] addrLen len of slave register addr(in byte)
* \param[out] buf data buf
* \param[in] len data length
* \retval 0 success
* \retval 1 failure
*/
int I2C_BurstRead(uint32_t instance ,uint8_t chipAddr, uint32_t addr, uint32_t addrLen, uint8_t *buf, uint32_t len)
{
uint8_t *p;
uint8_t err;
p = (uint8_t*)&addr;
err = 0;
chipAddr <<= 1;
I2C_Start();
I2C_SendByte(chipAddr);
err += I2C_WaitAck();
while(addrLen--)
{
I2C_SendByte(*p++);
err += I2C_WaitAck();
}
I2C_Start();
I2C_SendByte(chipAddr+1);
err += I2C_WaitAck();
while(len--)
{
*buf++ = I2C_GetByte();
if(len)
{
I2C_Ack();
}
}
I2C_NAck();
I2C_Stop();
return err;
}
Status ReadTMP102(u16 *TO_EEPROM,u16 *Data_ptr)//读取tmp101的2个字节温度
{
u16 TMP102_Data=0x0000;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send start------------------1
if(I2C_Start()!=BUS_READY){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_START);
return ERROR_FAILED;
}
//send SlaveADDR with write
I2C_SendByte(TMP102_WRITE_ADDR);//------------------2
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_DEVADDR);//------------------3
return ERROR_FAILED;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send CONF_ADDR------------------4
I2C_SendByte(TMP102_TEMP_REG);
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_TEMPADDR);//------------------5
return ERROR_FAILED;
}
I2C_Stop();//------------------NiMa没看到!!!!!!!!!!!!!!
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send start------------------6
if(I2C_Start()!=BUS_READY){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_RESTART);
return ERROR_FAILED;
}
//send SlaveADDR with write
I2C_SendByte(TMP102_READ_ADDR);//------------------7
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_RDEVADDR);//------------------8
return ERROR_FAILED;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 4 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//read TEMP
TMP102_Data=0x0000;
TMP102_Data = I2C_ReceiveByte();//--Byte1-------9
I2C_Ack();//------------------10
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 5 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
TMP102_Data<<=8;
TMP102_Data |= I2C_ReceiveByte();//---Byte2-----11
I2C_Ack();//------------------12
//send stop
I2C_Stop();//------------------13
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Done ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
TMP102_Data>>=4;
*Data_ptr = TMP102_Data;
//==============================================================
//-25~80
if(TMP102_Data&(0x800)){
//负数要转换
TMP102_Data-=(0x0E70-0x0500-1);
}
if(TMP102_Data<=0x690){
*TO_EEPROM = TMP102_Data*4;
}
else{
printf("Out of range from TMP102,TMP102=%X\t\r\n",*Data_ptr);
*TO_EEPROM = TO_EEPROM_ERROR;
}
//printf("TMP102=%X\tEEPROM=%X\r\n",*Data_ptr,*TO_EEPROM);
return OK_PASS;
}
u16 ReadTMP102_REG(unsigned char reg)
{
u16 TMP102_Data=0x0000;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send start------------------1
if(I2C_Start()!=BUS_READY){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_START);
}
//send SlaveADDR with write
I2C_SendByte(TMP102_WRITE_ADDR);//------------------2
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_DEVADDR);//------------------3
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 2 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send CONF_ADDR------------------4
I2C_SendByte(reg);
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_TEMPADDR);//------------------5
}
I2C_Stop();//------------------NiMa没看到!!!!!!!!!!!!!!
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 3 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//send start------------------6
if(I2C_Start()!=BUS_READY){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_RESTART);
return ERROR_FAILED;
}
//send SlaveADDR with write
I2C_SendByte(TMP102_READ_ADDR);//------------------7
if(I2C_WaitAck()!=BUS_ACK){
ERROR_MACRO(TMP102_DEV,RTMP_ERROR_SEND_RDEVADDR);//------------------8
return ERROR_FAILED;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 5 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
//read TEMP
TMP102_Data=0x0000;
TMP102_Data = I2C_ReceiveByte();//--Byte1-------9
I2C_Ack();//------------------10
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Frame 4 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
TMP102_Data=(TMP102_Data<<8);
TMP102_Data |=(u8)I2C_ReceiveByte();//---Byte2-----11
I2C_Ack();//------------------12
//send stop
I2C_Stop();//------------------13
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~ Done ~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
return TMP102_Data;
}
