void ds1820_state_machine()
{
switch (ds1820_state) {
case DS1820_IDLE:
if (ds1820_reset())
return;
ds1820_write(DS1820_CMD_SKIP_ROM);
ds1820_write(DS1820_CMD_CONVERT_T);
ds1820_state = DS1820_CONVERT;
break;
case DS1820_CONVERT:
if (ds1820_read() == 0xFF)
ds1820_state = DS1820_READ;
break;
case DS1820_READ:
ds1820_read_scratchpad();
ds1820_state = DS1820_IDLE;
break;
}
}
int main()
{
if(wiringPiSetup() == -1)
return 1;
float temp = 0.0f;
while(1)
{
temp = ds1820_read();
printf("%.1f\n", temp);
delay(1000);
}
}
static void ds1820_read_scratchpad()
{
uint8_t i, crc;
ds1820_reset();
ds1820_write(DS1820_CMD_SKIP_ROM);
ds1820_write(DS1820_CMD_READ);
crc = 0;
for (i = 0; i < 9; i++) {
ds1820[i] = ds1820_read();
crc = _crc_ibutton_update(crc, ds1820[i]);
}
/* only update temperature if CRC ok */
if (!crc) {
temperature[0] = ds1820[0];
temperature[1] = ds1820[1];
}
}
PROCESS_THREAD(rest_server_example, ev, data)
{
static struct etimer ds_periodic_timer;
#if REST_RES_DS1820
static struct etimer ds_read_timer;
#endif
PROCESS_BEGIN();
PRINTF("Starting Erbium Example Server\n");
#ifdef RF_CHANNEL
PRINTF("RF channel: %u\n", RF_CHANNEL);
#endif
#ifdef IEEE802154_PANID
PRINTF("PAN ID: 0x%04X\n", IEEE802154_PANID);
#endif
PRINTF("uIP buffer: %u\n", UIP_BUFSIZE);
PRINTF("LL header: %u\n", UIP_LLH_LEN);
PRINTF("IP+UDP header: %u\n", UIP_IPUDPH_LEN);
PRINTF("REST max chunk: %u\n", REST_MAX_CHUNK_SIZE);
/* if static routes are used rather than RPL */
#if !UIP_CONF_IPV6_RPL && !defined (CONTIKI_TARGET_MINIMAL_NET) && !defined (CONTIKI_TARGET_NATIVE)
set_global_address();
configure_routing();
#endif
/* Initialize the OSD Hardware. */
hw_init();
/* Initialize the REST engine. */
rest_init_engine();
/* Activate the application-specific resources. */
#if REST_RES_DS1820
rest_activate_resource(&resource_ds1820);
#endif
#if REST_RES_DHT11
rest_activate_resource(&resource_dht11);
#endif
#if REST_RES_DHT11TEMP
rest_activate_resource(&resource_dht11temp);
#endif
#if REST_RES_INFO
rest_activate_resource(&resource_info);
#endif
#if defined (PLATFORM_HAS_LEDS)
#if REST_RES_LEDS
rest_activate_resource(&resource_leds);
#endif
#if REST_RES_TOGGLE
rest_activate_resource(&resource_toggle);
#endif
#endif /* PLATFORM_HAS_LEDS */
#if defined (PLATFORM_HAS_TEMPERATURE) && REST_RES_TEMPERATURE
SENSORS_ACTIVATE(temperature_sensor);
rest_activate_resource(&resource_temperature);
#endif
#if defined (PLATFORM_HAS_BATTERY) && REST_RES_BATTERY
SENSORS_ACTIVATE(battery_sensor);
rest_activate_resource(&resource_battery);
#endif
/* Define application-specific events here. */
etimer_set(&ds_periodic_timer, MESURE_INTERVAL);
while(1) {
PROCESS_WAIT_EVENT();
#if defined (PLATFORM_HAS_BUTTON)
if (ev == sensors_event && data == &button_sensor) {
PRINTF("BUTTON\n");
}
#endif /* PLATFORM_HAS_BUTTON */
if(etimer_expired(&ds_periodic_timer)) {
PRINTF("Periodic\n");
etimer_reset(&ds_periodic_timer);
#if REST_RES_DHT11
// DHT_Read_Data(&dht11_temp, &dht11_hum);
DHT_Read_Data(&dht11_temp, &dht11_hum);
#endif
#if REST_RES_DS1820
if(ds1820_convert()){
etimer_set(&ds_read_timer, READ_TIME);
}
#endif
}
#if REST_RES_DS1820
if(etimer_expired(&ds_read_timer)) {
PRINTF("DS1820_Read\n");
ds1820_read();
}
#endif
} /* while (1) */
PROCESS_END();
}
