uint8_t DS18x20_Get_Conversion_Result_by_ROM_CRC(uint8_t (*serial)[DS18x20_SERIAL_NUM_SIZE], int32_t* temperature)
{
uint8_t cnt;
uint8_t pad[DS18x20_STRATCHPAD_SIZE];
/* Reset bus */
cnt = One_Wire_Reset();
if (cnt != ONE_WIRE_SUCCESS) {
return cnt;
}
One_Wire_Write_Byte(ONE_WIRE_MATCH_ROM);
for(cnt = 0; cnt != 8; cnt++) {
One_Wire_Write_Byte((*serial)[cnt]);
}
One_Wire_Write_Byte(DS18x20_READ_STRATCHPAD_CMD);
for(cnt = 0; cnt != DS18x20_STRATCHPAD_SIZE; cnt++) {
pad[cnt] = One_Wire_Read_Byte();
}
/* Verify CRC checksum */
if (Crc8Dallas(DS18x20_STRATCHPAD_SIZE, pad)) {
return ONE_WIRE_CRC_ERROR;
}
*temperature = DS18x20_Convert_Temperature(pad, serial);
return ONE_WIRE_SUCCESS;
}
unsigned char DS1821_Read_Status(unsigned int * status, GPIO_TypeDef * GPIOx, unsigned long PINx)
{
unsigned char tmp;
tmp=One_Wire_Reset(GPIOx, PINx);
if (tmp!=One_Wire_Success) return tmp;
One_Wire_Write_Byte(DS1821_READ_STATUS,GPIOx, PINx);
* status = One_Wire_Read_Byte(GPIOx, PINx);
return One_Wire_Success;
}
unsigned char DS1821_Read_Counter(unsigned int * counter, GPIO_TypeDef * GPIOx, unsigned long PINx)
{
unsigned char tmp;
tmp=One_Wire_Reset(GPIOx, PINx);
if (tmp!=One_Wire_Success) return tmp;
One_Wire_Write_Byte(DS1821_READ_COUNTER,GPIOx, PINx);
* counter = One_Wire_Read_Byte(GPIOx, PINx);
return One_Wire_Success;
}
unsigned char DS1821_Read_Temp(unsigned int * temperature, GPIO_TypeDef * GPIOx, unsigned long PINx)
{
unsigned char tmp;
tmp=One_Wire_Reset(GPIOx, PINx);
if (tmp!=One_Wire_Success) return tmp;
One_Wire_Write_Byte(DS1821_READ_TEMPERATURE, GPIOx, PINx);
* temperature = One_Wire_Read_Byte(GPIOx, PINx);
return One_Wire_Success;
}
uint8_t DS18x20_Start_Conversion_Skip_Rom(void)
{
uint8_t tmp;
/* Reset bus */
tmp = One_Wire_Reset();
if (tmp != ONE_WIRE_SUCCESS) {
return tmp;
}
One_Wire_Write_Byte(ONE_WIRE_SKIP_ROM);
One_Wire_Write_Byte(DS18x20_CONVERT_T_CMD);
if (One_Wire_Read_Byte()) {
return ONE_WIRE_DEVICE_BUSY;
}
return ONE_WIRE_SUCCESS;
}
uint8_t DS18x20_Read_Temp_NoCRC_Skip_Rom(uint8_t (*serial)[DS18x20_SERIAL_NUM_SIZE], int32_t* temperature)
{
uint8_t tmp, cnt;
uint8_t pad[DS18x20_STRATCHPAD_SIZE];
/* Reset bus */
tmp = One_Wire_Reset();
if (tmp != ONE_WIRE_SUCCESS) {
return tmp;
}
One_Wire_Write_Byte(ONE_WIRE_SKIP_ROM);
One_Wire_Write_Byte(DS18x20_READ_STRATCHPAD_CMD);
for (cnt = 0; cnt != DS18x20_STRATCHPAD_SIZE; cnt++) {
pad[cnt] = One_Wire_Read_Byte();
}
*temperature = DS18x20_Convert_Temperature(pad, serial);
return ONE_WIRE_SUCCESS;
}
