Stap 4: Uitbuiting du BMP180
Giet lire les valeurs capté par le BMP 180 il faut modifier le projet précédemment importé. Il faut een faire un BMP085.h qui est le kop corespondent à la classe contenant les méthodes propre à notre-capteur omvatten.
Le code est composé de 2 fonctions opdrachtgever:
- WrittenHandler: verlichte le buffer envoye par la Raspberry au RedBearLab to de setter un booléen permettant de savoir quel module est solicité par la framboos
- m_status_check_handle: Cette fonction est opwekking périodiquement, elle verificateur si une demande de r.i.o. een été faite au capteur si oui elle voi la valeur lu par le capteur à la Raspberry via la la méthode updateCharacteristicValue
La Périodiciteit d'appelle à la fonction m_status_check_handle est réglé par l'objet ticker grâce à la méthode hechten_us.
#include "mbed.h" #include "ble/BLE.h" #include "ble/FunctionPointerWithContext.h" #include "Servo.h" #include "GattCallbackParamTypes.h" #include "BMP085.h"</p><p>#define BLE_UUID_TXRX_SERVICE 0x0000 /**< The UUID of the Nordic UART Service. */ #define BLE_UUID_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */ #define BLE_UUIDS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */ #define TXRX_BUF_LEN 20 #define DIGITAL_OUT_PIN P0_17 //D7 #define DIGITAL_IN_PIN P0_5 //A4 #define PWM_PIN P0_16 //D6 #define SERVO_PIN P0_14 //D10 #define ANALOG_IN_PIN P0_1 //A0 BLE ble; DigitalOut LED_SET(DIGITAL_OUT_PIN); DigitalIn BUTTON(DIGITAL_IN_PIN); PwmOut PWM(PWM_PIN); AnalogIn ANALOG(ANALOG_IN_PIN); Servo MYSERVO(SERVO_PIN); BMP085 myCaptor(P0_29, P0_28); Serial pc(USBTX, USBRX); static uint8_t analog_enabled = 0; static uint8_t captor_enabled = 0; static uint8_t captor_enabled_for_pressure = 0; // The Nordic UART Service static const uint8_t uart_base_uuid[] = {0x71, 0x3D, 0, 0, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E}; static const uint8_t uart_tx_uuid[] = {0x71, 0x3D, 0, 3, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E}; static const uint8_t uart_rx_uuid[] = {0x71, 0x3D, 0, 2, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E}; static const uint8_t uart_base_uuid_rev[] = {0x1E, 0x94, 0x8D, 0xF1, 0x48, 0x31, 0x94, 0xBA, 0x75, 0x4C, 0x3E, 0x50, 0, 0, 0x3D, 0x71};</p><p>uint8_t txPayload[TXRX_BUF_LEN] = {0,}; uint8_t rxPayload[TXRX_BUF_LEN] = {0,}; GattCharacteristic txCharacteristic(uart_tx_uuid, txPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE); GattCharacteristic rxCharacteristic(uart_rx_uuid, rxPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY); GattCharacteristic *uartChars[] = {&txCharacteristic, &rxCharacteristic}; GattService uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *)); void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) { pc.printf("Disconnected \r\n"); pc.printf("Restart advertising \r\n"); ble.startAdvertising(); } void confirmationHandler(uint16_t Handler) { if (captor_enabled) captor_enabled = false; } void WrittenHandler(const GattWriteCallbackParams *Handler) { uint8_t buf[TXRX_BUF_LEN]; uint16_t bytesRead, index; if (Handler->handle == txCharacteristic.getValueAttribute().getHandle()) { ble.readCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(), buf, &bytesRead); memset(txPayload, 0, TXRX_BUF_LEN); memcpy(txPayload, buf, TXRX_BUF_LEN); for(index=0; index<bytesread; index++)="" pc.putc(buf[index]);="" if(buf[0]="=" 0x01)="" {="" if(buf[1]="=" 0x02)="" while(1)="" led_set="!LED_SET;" wait(0.25);="" }="" else="" 0xa0)="" analog_enabled="1;" captor_enabled="1;" 0x03)="" captor_enabled_for_pressure="1;" float="" value="(float)buf[1]/255;" pwm="value;" }<="" p=""></bytesread;></p><p>void m_status_check_handle(void) { uint8_t buf[4]; if (analog_enabled) // if analog reading enabled { // Read and send out float s = ANALOG; uint16_t value = s*1024; buf[0] = (0x0B); buf[1] = (value >> 8); buf[2] = (value); ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), buf, 3); } if (captor_enabled) // if analog reading enabled { // Read and send out captor_enabled = false; myCaptor.update(); float s = myCaptor.get_temperature() * 100; int value = s; buf[0] = (value >> 24); buf[1] = (value >> 16); buf[2] = (value >> 8); buf[3] = value; //for(int i = 0; i < 200000; ++i) ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), buf, 4); } // add to get pressure if (captor_enabled_for_pressure) { // Read and send out captor_enabled_for_pressure = false; myCaptor.update(); float s = myCaptor.get_pressure() * 100; uint32_t value = s; buf[0] = (value >> 24); buf[1] = (value >> 16); buf[2] = (value >> 8); buf[3] = value; ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), buf, 4); } }</p><p>int main(void) { Ticker ticker; ticker.attach_us(m_status_check_handle, 200000); ble.init(); ble.onDisconnection(disconnectionCallback); ble.onDataWritten(WrittenHandler); ble.onConfirmationReceived(confirmationHandler); pc.baud(9600); pc.printf("SimpleChat Init \r\n"); // setup advertising ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED); ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, (const uint8_t *)"Mustafa", sizeof("Mustafa") - 1); ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS, (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid)); // 100ms; in multiples of 0.625ms. ble.setAdvertisingInterval(160); ble.addService(uartService); ble.startAdvertising(); pc.printf("Advertising Start \r\n"); while(1) { ble.waitForEvent(); } }
