static void ds18x20GetAllTemps()
{
uint8_t i, j;
uint8_t crc;
static uint8_t arr[DS18X20_SCRATCH_LEN];
for (i = 0; i < devCount; i++) {
if (ds18x20IsOnBus()) {
ds18x20Select(&devs[i]);
ds18x20SendByte(DS18X20_CMD_READ_SCRATCH);
// Control scratchpad checksum
crc = 0;
for (j = 0; j < DS18X20_SCRATCH_LEN; j++) {
arr[j] = ds18x20GetByte();
crc = _crc_ibutton_update(crc, arr[j]);
}
if (crc == 0) {
// Save first 2 bytes (temperature) of scratchpad
for (j = 0; j < DS18X20_SCRATCH_TEMP_LEN; j++)
devs[i].sp[j] = arr[j];
}
}
}
return;
}
uint8_t ds18x20Process(void)
{
ds18x20GetAllTemps();
// Convert temperature
if (ds18x20IsOnBus())
ds18x20ConvertTemp();
return devCount;
}
void ds18x20Process(void)
{
if (getTempTimer() == 0) {
/* Convert temperature */
if (ds18x20IsOnBus())
convertTemp();
}
return;
}
void ds18x20ConvertTemp(void)
{
if (ds18x20IsOnBus()) {
ds18x20SendByte(DS18X20_CMD_SKIP_ROM);
ds18x20SendByte(DS18X20_CMD_CONVERT);
#ifdef DS18X20_PARASITE_POWER
/* Set active 1 on port for at least 750ms as parasitic power */
PORT(ONE_WIRE) |= ONE_WIRE_LINE;
DDR(ONE_WIRE) |= ONE_WIRE_LINE;
#endif
}
return;
}
void ds18x20SearchDevices(void)
{
uint8_t i, j;
uint8_t *newID;
uint8_t *currentID;
uint8_t lastDeviation;
uint8_t count = 0;
// Reset addresses
for (i = 0; i < DS18X20_MAX_DEV; i++)
for (j = 0; j < DS18X20_ID_LEN; j++)
devs[i].id[j] = 0x00;
// Search all sensors
newID = devs[0].id;
lastDeviation = 0;
currentID = newID;
do {
for (j = 0; j < DS18X20_ID_LEN; j++)
newID[j] = currentID[j];
if (!ds18x20IsOnBus()) {
devCount = 0;
return;
}
lastDeviation = ds18x20SearchRom(newID, lastDeviation);
currentID = newID;
count++;
newID=devs[count].id;
} while (lastDeviation != 0);
devCount = count;
return;
}
void ds18x20GetAllTemps()
{
uint8_t i, j;
uint8_t arr[9];
for (i = 0; i < devCount; i++) {
if (ds18x20IsOnBus()) {
ds18x20Select(&devs[i]);
ds18x20SendByte(DS18X20_CMD_READ_SCRATCH);
for (j = 0; j < 9; j++)
arr[j] = ds18x20GetByte();
if (!calcCRC8(arr, sizeof(arr))) {
for (j = 0; j < 9; j++)
devs[i].sp[j] = arr[j];
}
}
}
return;
}