Chengwei Zhang / Mbed 2 deprecated BLE_ToUART

NRF51822 as bluetooth to UART

Dependencies:   BLE_API BLE_LoopbackUART mbed nRF51822

Fork of BLE_LoopbackUART by Bluetooth Low Energy

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 }