95 lines
1.6 KiB
C
95 lines
1.6 KiB
C
//#include <proc/p32mx440f256h.h>
|
|
|
|
#include "TC77.h"
|
|
#include "BoardCfg.h"
|
|
#include "timer.h"
|
|
|
|
short mDeviceID;
|
|
|
|
int TC77Configure()
|
|
{
|
|
|
|
TEMP_SENSOR_CS_PIN = 0;
|
|
|
|
//Execute a 16 bits read first.
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
|
|
//Now, write 0xFFFF to config register.
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
|
|
//Read Device ID
|
|
SPI3BUF = 0x00;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
mDeviceID = SPI3BUF;
|
|
mDeviceID <<= 8;
|
|
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
mDeviceID += SPI3BUF;
|
|
TEMP_SENSOR_CS_PIN = 1;
|
|
|
|
mDeviceID &= 0xFFFC;
|
|
if(mDeviceID != 0x5400)
|
|
{
|
|
return RET_ERROR;
|
|
}
|
|
|
|
Sleep(100);
|
|
|
|
//Device detected. Now, put the device in continuous read mode.
|
|
TEMP_SENSOR_CS_PIN = 0;
|
|
|
|
//Execute a 16 bits read first.
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
|
|
//Now, write 0x0000 to config register.
|
|
SPI3BUF = 0x00;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
SPI3BUF = 0x00;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
|
|
TEMP_SENSOR_CS_PIN = 1;
|
|
|
|
return RET_OK;
|
|
}
|
|
float TC77GetActualTemp()
|
|
{
|
|
short RawTemp = 0;
|
|
float Temp;
|
|
TEMP_SENSOR_CS_PIN = 0;
|
|
|
|
//Read 16 bits.
|
|
SPI3BUF = 0x00;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
RawTemp = SPI3BUF;
|
|
RawTemp <<= 8;
|
|
|
|
SPI3BUF = 0xFF;
|
|
while(!SPI3STATbits.SPIRBF);
|
|
RawTemp += SPI3BUF;
|
|
|
|
TEMP_SENSOR_CS_PIN = 1;
|
|
|
|
RawTemp &= 0xFFF8; //Get rid of useless 3 LSB
|
|
//RawTemp >>= 3;
|
|
|
|
Temp = ((float)0.0625 * (float)RawTemp);
|
|
Temp /= 8;
|
|
|
|
return Temp;
|
|
|
|
}
|
|
|
|
short TC77GetDeviceID()
|
|
{
|
|
return mDeviceID;
|
|
} |