Garima Gupta / Mbed 2 deprecated BLE_UART_LCD_Batt_DevInfo

Use of nRF51822 to demonstrate usage of BLE-UART service provided by Nordic and the use of uLCD-144-G2. The demonstration uses the nRF Master Control Panel and nRF UART demo apps provided by Nordic and available on Google Play and Apple Store. The firmware receives data over the TX characteristic, increments it by 1 and sends it over RX characteristic. The notifications need to be enabled for the RX characteristic in the Master Control Panel to be able to receive the data. For more information check the notebook page: http://developer.mbed.org/users/garimagupta002/notebook/ble-uart-lcd-demo/

Dependencies:   4DGL-uLCD-SE BLE_API DFRobot_BLE_LoopbackUART mbed nRF51822

Fork of DFRobot_BLE_LoopbackUART by Angelo qiao

main.cpp@2:e060367b9024, 2014-06-13 (annotated)

Committer:
Rohit Grover
Date:
Fri Jun 13 11:19:22 2014 +0100
Revision:
2:e060367b9024
Parent:
0:e910d9bb040f
Child:
5:4bc41267a03a
update demo to use the new APIs; we have it working now.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 0:e910d9bb040f 1 /* mbed Microcontroller Library
yihui 0:e910d9bb040f 2 * Copyright (c) 2006-2013 ARM Limited
yihui 0:e910d9bb040f 3 *
yihui 0:e910d9bb040f 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 0:e910d9bb040f 5 * you may not use this file except in compliance with the License.
yihui 0:e910d9bb040f 6 * You may obtain a copy of the License at
yihui 0:e910d9bb040f 7 *
yihui 0:e910d9bb040f 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 0:e910d9bb040f 9 *
yihui 0:e910d9bb040f 10 * Unless required by applicable law or agreed to in writing, software
yihui 0:e910d9bb040f 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 0:e910d9bb040f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 0:e910d9bb040f 13 * See the License for the specific language governing permissions and
yihui 0:e910d9bb040f 14 * limitations under the License.
yihui 0:e910d9bb040f 15 */
yihui 0:e910d9bb040f 16
yihui 0:e910d9bb040f 17 #include "mbed.h"
Rohit Grover 2:e060367b9024 18 #include "BLEDevice.h"
yihui 0:e910d9bb040f 19
Rohit Grover 2:e060367b9024 20 #define BLE_UUID_NUS_SERVICE 0x0001 /**< The UUID of the Nordic UART Service. */
Rohit Grover 2:e060367b9024 21 #define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */
Rohit Grover 2:e060367b9024 22 #define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */
yihui 0:e910d9bb040f 23
Rohit Grover 2:e060367b9024 24 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
Rohit Grover 2:e060367b9024 25 * it will have an impact on code-size and power consumption. */
yihui 0:e910d9bb040f 26
Rohit Grover 2:e060367b9024 27 #if NEED_CONSOLE_OUTPUT
Rohit Grover 2:e060367b9024 28 Serial pc(USBTX, USBRX);
Rohit Grover 2:e060367b9024 29 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
yihui 0:e910d9bb040f 30 #else
Rohit Grover 2:e060367b9024 31 #define DEBUG(...) /* nothing */
Rohit Grover 2:e060367b9024 32 #endif /* #if NEED_CONSOLE_OUTPUT */
yihui 0:e910d9bb040f 33
Rohit Grover 2:e060367b9024 34 BLEDevice ble;
Rohit Grover 2:e060367b9024 35 DigitalOut led1(LED1);
yihui 0:e910d9bb040f 36
yihui 0:e910d9bb040f 37 // The Nordic UART Service
Rohit Grover 2:e060367b9024 38 static const uint8_t uart_base_uuid[] = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
Rohit Grover 2:e060367b9024 39 static const uint8_t uart_tx_uuid[] = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
Rohit Grover 2:e060367b9024 40 static const uint8_t uart_rx_uuid[] = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
Rohit Grover 2:e060367b9024 41 static const uint8_t uart_base_uuid_rev[] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x01, 0x00, 0x40, 0x6e};
yihui 0:e910d9bb040f 42 uint8_t txPayload[8] = {0,};
yihui 0:e910d9bb040f 43 uint8_t rxPayload[8] = {0,};
Rohit Grover 2:e060367b9024 44 GattCharacteristic txCharacteristic (uart_tx_uuid, txPayload, 1, 8,
Rohit Grover 2:e060367b9024 45 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
Rohit Grover 2:e060367b9024 46 GattCharacteristic rxCharacteristic (uart_rx_uuid, rxPayload, 1, 8,
Rohit Grover 2:e060367b9024 47 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
Rohit Grover 2:e060367b9024 48 GattCharacteristic *uartChars[] = {&txCharacteristic, &rxCharacteristic};
Rohit Grover 2:e060367b9024 49 GattService uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));
yihui 0:e910d9bb040f 50
Rohit Grover 2:e060367b9024 51 void disconnectionCallback(void)
yihui 0:e910d9bb040f 52 {
Rohit Grover 2:e060367b9024 53 DEBUG("Disconnected!\n\r");
Rohit Grover 2:e060367b9024 54 DEBUG("Restarting the advertising process\n\r");
Rohit Grover 2:e060367b9024 55 ble.startAdvertising();
Rohit Grover 2:e060367b9024 56 }
yihui 0:e910d9bb040f 57
Rohit Grover 2:e060367b9024 58 void onDataWritten(uint16_t charHandle)
yihui 0:e910d9bb040f 59 {
Rohit Grover 2:e060367b9024 60 if (charHandle == txCharacteristic.getHandle()) {
Rohit Grover 2:e060367b9024 61 DEBUG("onDataWritten()\n\r");
Rohit Grover 2:e060367b9024 62 uint16_t bytesRead;
Rohit Grover 2:e060367b9024 63 ble.readCharacteristicValue(txCharacteristic.getHandle(), txPayload, &bytesRead);
Rohit Grover 2:e060367b9024 64 DEBUG("ECHO: %s\n\r", (char *)txPayload);
Rohit Grover 2:e060367b9024 65 ble.updateCharacteristicValue(rxCharacteristic.getHandle(), txPayload, bytesRead);
yihui 0:e910d9bb040f 66 }
Rohit Grover 2:e060367b9024 67 }
yihui 0:e910d9bb040f 68
Rohit Grover 2:e060367b9024 69 void periodicCallback(void)
Rohit Grover 2:e060367b9024 70 {
Rohit Grover 2:e060367b9024 71 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
Rohit Grover 2:e060367b9024 72 }
yihui 0:e910d9bb040f 73
yihui 0:e910d9bb040f 74 int main(void)
yihui 0:e910d9bb040f 75 {
Rohit Grover 2:e060367b9024 76 led1 = 1;
Rohit Grover 2:e060367b9024 77 Ticker ticker;
Rohit Grover 2:e060367b9024 78 ticker.attach(periodicCallback, 1);
yihui 0:e910d9bb040f 79
Rohit Grover 2:e060367b9024 80 DEBUG("Initialising the nRF51822\n\r");
Rohit Grover 2:e060367b9024 81 ble.init();
Rohit Grover 2:e060367b9024 82 ble.onDisconnection(disconnectionCallback);
Rohit Grover 2:e060367b9024 83 ble.onDataWritten(onDataWritten);
yihui 0:e910d9bb040f 84
Rohit Grover 2:e060367b9024 85 /* setup advertising */
Rohit Grover 2:e060367b9024 86 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
Rohit Grover 2:e060367b9024 87 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
Rohit Grover 2:e060367b9024 88 ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
Rohit Grover 2:e060367b9024 89 (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
Rohit Grover 2:e060367b9024 90 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
Rohit Grover 2:e060367b9024 91 (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid));
yihui 0:e910d9bb040f 92
Rohit Grover 2:e060367b9024 93 ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
Rohit Grover 2:e060367b9024 94 ble.startAdvertising();
yihui 0:e910d9bb040f 95
Rohit Grover 2:e060367b9024 96 ble.addService(uartService);
yihui 0:e910d9bb040f 97
Rohit Grover 2:e060367b9024 98 while (true) {
Rohit Grover 2:e060367b9024 99 ble.waitForEvent();
yihui 0:e910d9bb040f 100 }
yihui 0:e910d9bb040f 101 }