main.cpp

00001 #include "mbed.h"
00002 #include "BLE.h"
00003 #include "WeatherService.h"
00004 #include "bme280.h"
00005 #define I2C_SDA P0_0
00006 #define I2C_SCL P0_1
00007 
00008 float t;
00009 float pr;
00010 float h;
00011 
00012 uint8_t address = 0x78;
00013 
00014 I2C i2c(I2C_SDA, I2C_SCL);
00015 
00016 BLE ble;
00017 
00018 DigitalOut okLED(LED1);
00019 DigitalOut errLED(LED2);
00020 DigitalOut instrumentsPower(P0_22);
00021 
00022 BME280 bme280;
00023 
00024 const static char DEVICE_NAME[] = "Weather Station";
00025 
00026 static const uint16_t serviceList[] = {
00027     GattService::UUID_ENVIRONMENTAL_SERVICE
00028 };
00029 
00030 static volatile bool triggerSensorPolling = false;
00031 
00032 //bme280
00033 void i2cWrite(uint8_t i2c_address, uint8_t *p_data, uint8_t data_size, uint8_t repeated_start)
00034 {
00035 // mbed uses 8-bit addresses, always confusing.
00036     i2c.write(i2c_address<<1,(const char *)p_data,data_size,repeated_start);
00037 }
00038 
00039 void i2cRead(uint8_t i2c_address, uint8_t *p_data, uint8_t data_size)
00040 {
00041 // mbed uses 8-bit addresses, always confusing.
00042     i2c.read(i2c_address<<1,(char *)p_data,data_size);
00043 }
00044 
00045 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00046 {
00047 /* Restart Advertising on disconnection*/
00048     ble.gap().startAdvertising();
00049 }
00050 
00051 void blink(void)
00052 {
00053 //    statusLED = !statusLED;
00054     triggerSensorPolling = true;
00055 }
00056 
00057 void updateFromBME280()
00058 {
00059     bme280.read();
00060     t = bme280.temperature();
00061 //    float p = bme280.pressure()/100;
00062 //    pr = p*0.750062;
00063     pr = bme280.pressure();
00064     h = bme280.humidity();
00065 }
00066 
00067 
00068 int main(void)
00069 {
00070     okLED = 0;
00071     errLED = 0;
00072 
00073     Ticker ticker;
00074     ticker.attach(blink, 5);
00075 
00076     ble.init();
00077 
00078     bme280.begin(BME280_I2C_ADDRESS1);
00079     // Configure for test purposes.
00080     bme280.writeConfigRegister(BME280_STANDBY_500_US,BME280_FILTER_OFF,0);
00081     bme280.writeControlRegisters(BME280_OVERSAMPLING_1X,BME280_OVERSAMPLING_1X,BME280_OVERSAMPLING_1X,BME280_MODE_NORMAL);
00082 
00083 
00084     ble.gap().onDisconnection(disconnectionCallback);
00085 
00086     /* Setup weather service. */
00087     WeatherService weatherService(ble);
00088 
00089     /* setup advertising */
00090     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00091     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)serviceList, sizeof(serviceList));
00092     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::UNKNOWN);
00093     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00094     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00095     ble.gap().setAdvertisingInterval(1000); /* 1000ms */
00096     ble.gap().startAdvertising();
00097 
00098     while (true) {
00099         if (triggerSensorPolling && ble.getGapState().connected) {
00100             okLED = 1;
00101             triggerSensorPolling = false;
00102 
00103             instrumentsPower = 1;
00104             wait(1);
00105             updateFromBME280();
00106             instrumentsPower = 0;
00107 
00108             weatherService.updateTemperature(t);
00109             weatherService.updatePressure(pr);
00110             weatherService.updateHumidity(h);
00111 
00112         } else {
00113             okLED = 0;
00114             ble.waitForEvent();
00115         }
00116     }
00117 }