void readTemp()
{
PORTC &= 0b11111000;; //turns off display because interrupts are disabled during DS18b20 measurements
volatile int16_t decicelsius;
DS18X20_start_meas( DS18X20_POWER_EXTERN, NULL );
_delay_ms( DS18B20_TCONV_12BIT );
DS18X20_read_decicelsius_single( gSensorIDs[0][0], &decicelsius );
display[0] = decicelsius / 100;
display[1] = (decicelsius - (display[0] * 100))/ 10;
display[2] = decicelsius % 10;
}
void hw_read_tick(Context * ctx)
{
/* DS */
if (DS18X20_conversion_in_progress() == DS18X20_CONVERSION_DONE) {
if (DS18X20_read_decicelsius_single(DS18B20_FAMILY_CODE, &ctx->t1) == DS18X20_OK) {
ctx->temp_status = DS_OK;
} else {
ctx->temp_status = DS_READ_ERROR;
}
if (DS18X20_start_meas(DS18X20_POWER_EXTERN, NULL) != DS18X20_OK) {
ctx->temp_status = DS_MEAS_ERROR;
}
}
}
int main( void )
{
uint8_t nSensors, i;
int16_t decicelsius;
uint8_t error;
uart_init((UART_BAUD_SELECT((BAUD),F_CPU)));
#ifndef OW_ONE_BUS
ow_set_bus(&PINA,&PORTA,&DDRA,PA6);
#endif
sei();
uart_puts_P( NEWLINESTR "DS18X20 1-Wire-Reader Demo by Martin Thomas" NEWLINESTR );
uart_puts_P( "-------------------------------------------" );
nSensors = search_sensors();
uart_put_int( (int)nSensors );
uart_puts_P( " DS18X20 Sensor(s) available:" NEWLINESTR );
#if DS18X20_VERBOSE
for (i = 0; i < nSensors; i++ ) {
uart_puts_P("# in Bus :");
uart_put_int( (int)i + 1);
uart_puts_P(" : ");
DS18X20_show_id_uart( &gSensorIDs[i][0], OW_ROMCODE_SIZE );
uart_puts_P( NEWLINESTR );
}
#endif
for ( i = 0; i < nSensors; i++ ) {
uart_puts_P( "Sensor# " );
uart_put_int( (int)i+1 );
uart_puts_P( " is a " );
if ( gSensorIDs[i][0] == DS18S20_FAMILY_CODE ) {
uart_puts_P( "DS18S20/DS1820" );
} else if ( gSensorIDs[i][0] == DS1822_FAMILY_CODE ) {
uart_puts_P( "DS1822" );
}
else {
uart_puts_P( "DS18B20" );
}
uart_puts_P( " which is " );
if ( DS18X20_get_power_status( &gSensorIDs[i][0] ) == DS18X20_POWER_PARASITE ) {
uart_puts_P( "parasite" );
} else {
uart_puts_P( "externally" );
}
uart_puts_P( " powered" NEWLINESTR );
}
#if DS18X20_EEPROMSUPPORT
if ( nSensors > 0 ) {
eeprom_test();
}
#endif
if ( nSensors == 1 ) {
uart_puts_P( NEWLINESTR "There is only one sensor "
"-> Demo of \"DS18X20_read_decicelsius_single\":" NEWLINESTR );
i = gSensorIDs[0][0]; // family-code for conversion-routine
DS18X20_start_meas( DS18X20_POWER_PARASITE, NULL );
_delay_ms( DS18B20_TCONV_12BIT );
DS18X20_read_decicelsius_single( i, &decicelsius );
uart_put_temp( decicelsius );
uart_puts_P( NEWLINESTR );
}
for(;;) { // main loop
error = 0;
if ( nSensors == 0 ) {
error++;
}
uart_puts_P( NEWLINESTR "Convert_T and Read Sensor by Sensor (reverse order)" NEWLINESTR );
for ( i = nSensors; i > 0; i-- ) {
if ( DS18X20_start_meas( DS18X20_POWER_PARASITE,
&gSensorIDs[i-1][0] ) == DS18X20_OK ) {
_delay_ms( DS18B20_TCONV_12BIT );
uart_puts_P( "Sensor# " );
uart_put_int( (int) i );
uart_puts_P(" = ");
if ( DS18X20_read_decicelsius( &gSensorIDs[i-1][0], &decicelsius)
== DS18X20_OK ) {
uart_put_temp( decicelsius );
} else {
uart_puts_P( "CRC Error (lost connection?)" );
error++;
}
uart_puts_P( NEWLINESTR );
}
else {
uart_puts_P( "Start meas. failed (short circuit?)" );
error++;
}
}
uart_puts_P( NEWLINESTR "Convert_T for all Sensors and Read Sensor by Sensor" NEWLINESTR );
if ( DS18X20_start_meas( DS18X20_POWER_PARASITE, NULL )
== DS18X20_OK) {
_delay_ms( DS18B20_TCONV_12BIT );
for ( i = 0; i < nSensors; i++ ) {
uart_puts_P( "Sensor# " );
uart_put_int( (int)i + 1 );
uart_puts_P(" = ");
if ( DS18X20_read_decicelsius( &gSensorIDs[i][0], &decicelsius )
== DS18X20_OK ) {
uart_put_temp( decicelsius );
}
else {
uart_puts_P( "CRC Error (lost connection?)" );
error++;
}
uart_puts_P( NEWLINESTR );
}
#if DS18X20_MAX_RESOLUTION
int32_t temp_eminus4;
for ( i = 0; i < nSensors; i++ ) {
uart_puts_P( "Sensor# " );
uart_put_int( i+1 );
uart_puts_P(" = ");
if ( DS18X20_read_maxres( &gSensorIDs[i][0], &temp_eminus4 )
== DS18X20_OK ) {
uart_put_temp_maxres( temp_eminus4 );
}
else {
uart_puts_P( "CRC Error (lost connection?)" );
error++;
}
uart_puts_P( NEWLINESTR );
}
#endif
}
else {
uart_puts_P( "Start meas. failed (short circuit?)" );
error++;
}
#if DS18X20_VERBOSE
// all devices:
uart_puts_P( NEWLINESTR "Verbose output" NEWLINESTR );
DS18X20_start_meas( DS18X20_POWER_PARASITE, NULL );
_delay_ms( DS18B20_TCONV_12BIT );
DS18X20_read_meas_all_verbose();
#endif
if ( error ) {
uart_puts_P( "*** problems - rescanning bus ..." );
nSensors = search_sensors();
uart_put_int( (int) nSensors );
uart_puts_P( " DS18X20 Sensor(s) available" NEWLINESTR );
error = 0;
}
_delay_ms(3000);
}
}
