Frank Duignan / Mbed 2 deprecated BLE_BBC_LSM303_MAG

Test program for magnetometer

Dependencies:   mbed AES BLE_API nRF51822 smallAES

ButtonAService.h@2:4871b5ad7938, 2019-09-30 (annotated)

Committer:
f3d
Date:
Mon Sep 30 10:38:33 2019 +0000
Revision:
2:4871b5ad7938
Code for the LSM303 version of the BBC Microbit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f3d 2:4871b5ad7938 1 #ifndef __BUTTONA_SERVICE_H__
f3d 2:4871b5ad7938 2 #define __BUTTONA_SERVICE_H__
f3d 2:4871b5ad7938 3 // Button A is on P0 bit 17
f3d 2:4871b5ad7938 4 volatile uint32_t * P0OUT = (uint32_t *)0x50000504;
f3d 2:4871b5ad7938 5 volatile uint32_t * P0DIR = (uint32_t *)0x50000514;
f3d 2:4871b5ad7938 6 volatile uint32_t * P0IN = (uint32_t *)0x50000510;
f3d 2:4871b5ad7938 7 volatile uint32_t * P0CONF = (uint32_t *)(0x50000700);
f3d 2:4871b5ad7938 8 int8_t initialValue=0;
f3d 2:4871b5ad7938 9 class ButtonAService {
f3d 2:4871b5ad7938 10 public:
f3d 2:4871b5ad7938 11 const static uint16_t BUTTONA_SERVICE_UUID = 0x1eee;
f3d 2:4871b5ad7938 12 const static uint16_t BUTTONA_STATE_CHARACTERISTIC_UUID = 0x2019;
f3d 2:4871b5ad7938 13
f3d 2:4871b5ad7938 14 ButtonAService(BLEDevice &_ble) :
f3d 2:4871b5ad7938 15 ble(_ble), ButtonState(BUTTONA_STATE_CHARACTERISTIC_UUID,&initialValue,GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)
f3d 2:4871b5ad7938 16 {
f3d 2:4871b5ad7938 17 GattCharacteristic *charTable[] = {&ButtonState};
f3d 2:4871b5ad7938 18 GattService btnService(BUTTONA_SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
f3d 2:4871b5ad7938 19 ble.addService(btnService);
f3d 2:4871b5ad7938 20 P0CONF[17] = 0; // On power up, input buffer is not connected so must do this
f3d 2:4871b5ad7938 21 PreviousButtonState = -1;
f3d 2:4871b5ad7938 22 }
f3d 2:4871b5ad7938 23
f3d 2:4871b5ad7938 24 GattAttribute::Handle_t getValueHandle() const {
f3d 2:4871b5ad7938 25 return ButtonState.getValueHandle();
f3d 2:4871b5ad7938 26 }
f3d 2:4871b5ad7938 27 void poll() {
f3d 2:4871b5ad7938 28 uint8_t newValue = GetButtonAState();
f3d 2:4871b5ad7938 29 if (newValue != PreviousButtonState)
f3d 2:4871b5ad7938 30 {
f3d 2:4871b5ad7938 31 // only send an update if the button state has changed (reduces traffic)
f3d 2:4871b5ad7938 32 ble.gattServer().write(this->getValueHandle(), (uint8_t *)&newValue, sizeof(uint8_t));
f3d 2:4871b5ad7938 33 PreviousButtonState = newValue;
f3d 2:4871b5ad7938 34 }
f3d 2:4871b5ad7938 35 }
f3d 2:4871b5ad7938 36 uint8_t GetButtonAState()
f3d 2:4871b5ad7938 37 {
f3d 2:4871b5ad7938 38 if ((*P0IN & (1 << 17))==0)
f3d 2:4871b5ad7938 39 return 1;
f3d 2:4871b5ad7938 40 else
f3d 2:4871b5ad7938 41 return 0;
f3d 2:4871b5ad7938 42 }
f3d 2:4871b5ad7938 43
f3d 2:4871b5ad7938 44 private:
f3d 2:4871b5ad7938 45 BLEDevice &ble;
f3d 2:4871b5ad7938 46 ReadOnlyGattCharacteristic<int8_t> ButtonState;
f3d 2:4871b5ad7938 47 uint8_t PreviousButtonState;
f3d 2:4871b5ad7938 48
f3d 2:4871b5ad7938 49 };
f3d 2:4871b5ad7938 50
f3d 2:4871b5ad7938 51 #endif