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@0:e910d9bb040f, 2014-05-26 (annotated)

Committer:
yihui
Date:
Mon May 26 06:58:45 2014 +0000
Revision:
0:e910d9bb040f
Child:
2:e060367b9024
initial

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"
yihui 0:e910d9bb040f 18 #include "nRF51822n.h"
yihui 0:e910d9bb040f 19
yihui 0:e910d9bb040f 20 #define BLE_UUID_NUS_SERVICE 0x0001 /**< The UUID of the Nordic UART Service. */
yihui 0:e910d9bb040f 21 #define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */
yihui 0:e910d9bb040f 22 #define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */
yihui 0:e910d9bb040f 23
yihui 0:e910d9bb040f 24 #ifdef DEBUG
yihui 0:e910d9bb040f 25 #define LOG(args...) pc.printf(args)
yihui 0:e910d9bb040f 26
yihui 0:e910d9bb040f 27 Serial pc(USBTX, USBRX);
yihui 0:e910d9bb040f 28 #else
yihui 0:e910d9bb040f 29 #define LOG(args...)
yihui 0:e910d9bb040f 30 #endif
yihui 0:e910d9bb040f 31
yihui 0:e910d9bb040f 32 nRF51822n nrf; /* BLE radio driver */
yihui 0:e910d9bb040f 33
yihui 0:e910d9bb040f 34 DigitalOut led1(p1);
yihui 0:e910d9bb040f 35 DigitalOut advertisingStateLed(p30);
yihui 0:e910d9bb040f 36
yihui 0:e910d9bb040f 37 // The Nordic UART Service
yihui 0:e910d9bb040f 38 uint8_t uart_base_uuid[] = {0x6e, 0x40, 0x01, 0x00, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
yihui 0:e910d9bb040f 39 uint8_t txPayload[8] = {0,};
yihui 0:e910d9bb040f 40 uint8_t rxPayload[8] = {0,};
yihui 0:e910d9bb040f 41 GattService uartService (uart_base_uuid);
yihui 0:e910d9bb040f 42 GattCharacteristic txCharacteristic (BLE_UUID_NUS_TX_CHARACTERISTIC, 1, 8,
yihui 0:e910d9bb040f 43 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
yihui 0:e910d9bb040f 44 GattCharacteristic rxCharacteristic (BLE_UUID_NUS_RX_CHARACTERISTIC, 1, 8,
yihui 0:e910d9bb040f 45 GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
yihui 0:e910d9bb040f 46
yihui 0:e910d9bb040f 47 /* Advertising data and parameters */
yihui 0:e910d9bb040f 48 GapAdvertisingData advData;
yihui 0:e910d9bb040f 49 GapAdvertisingData scanResponse;
yihui 0:e910d9bb040f 50 GapAdvertisingParams advParams ( GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED );
yihui 0:e910d9bb040f 51
yihui 0:e910d9bb040f 52 uint16_t uuid16_list[] = {BLE_UUID_NUS_SERVICE};
yihui 0:e910d9bb040f 53
yihui 0:e910d9bb040f 54 /**************************************************************************/
yihui 0:e910d9bb040f 55 /*!
yihui 0:e910d9bb040f 56 @brief This custom class can be used to override any GapEvents
yihui 0:e910d9bb040f 57 that you are interested in handling on an application level.
yihui 0:e910d9bb040f 58 */
yihui 0:e910d9bb040f 59 /**************************************************************************/
yihui 0:e910d9bb040f 60 class GapEventHandler : public GapEvents
yihui 0:e910d9bb040f 61 {
yihui 0:e910d9bb040f 62 //virtual void onTimeout(void) {}
yihui 0:e910d9bb040f 63
yihui 0:e910d9bb040f 64 virtual void onConnected(void) {
yihui 0:e910d9bb040f 65 advertisingStateLed = 0;
yihui 0:e910d9bb040f 66 LOG("Connected!\n\r");
yihui 0:e910d9bb040f 67 }
yihui 0:e910d9bb040f 68
yihui 0:e910d9bb040f 69 /* When a client device disconnects we need to start advertising again. */
yihui 0:e910d9bb040f 70 virtual void onDisconnected(void) {
yihui 0:e910d9bb040f 71 nrf.getGap().startAdvertising(advParams);
yihui 0:e910d9bb040f 72 advertisingStateLed = 1;
yihui 0:e910d9bb040f 73 LOG("Disconnected!\n\r");
yihui 0:e910d9bb040f 74 LOG("Restarting the advertising process\n\r");
yihui 0:e910d9bb040f 75 }
yihui 0:e910d9bb040f 76 };
yihui 0:e910d9bb040f 77
yihui 0:e910d9bb040f 78 /**************************************************************************/
yihui 0:e910d9bb040f 79 /*!
yihui 0:e910d9bb040f 80 @brief This custom class can be used to override any GattServerEvents
yihui 0:e910d9bb040f 81 that you are interested in handling on an application level.
yihui 0:e910d9bb040f 82 */
yihui 0:e910d9bb040f 83 /**************************************************************************/
yihui 0:e910d9bb040f 84 class GattServerEventHandler : public GattServerEvents
yihui 0:e910d9bb040f 85 {
yihui 0:e910d9bb040f 86 virtual void onDataSent(uint16_t charHandle) {
yihui 0:e910d9bb040f 87 if (charHandle == txCharacteristic.handle) {
yihui 0:e910d9bb040f 88 LOG("onDataSend()\n\r");
yihui 0:e910d9bb040f 89
yihui 0:e910d9bb040f 90 }
yihui 0:e910d9bb040f 91 }
yihui 0:e910d9bb040f 92
yihui 0:e910d9bb040f 93 virtual void onDataWritten(uint16_t charHandle) {
yihui 0:e910d9bb040f 94 if (charHandle == txCharacteristic.handle) {
yihui 0:e910d9bb040f 95 LOG("onDataWritten()\n\r");
yihui 0:e910d9bb040f 96 nrf.getGattServer().readValue(txCharacteristic.handle, txPayload, 8); // Current APIs don't provide the length of the payload
yihui 0:e910d9bb040f 97 LOG("ECHO: %s\n\r", (char *)txPayload);
yihui 0:e910d9bb040f 98 nrf.getGattServer().updateValue(rxCharacteristic.handle, txPayload, 8);
yihui 0:e910d9bb040f 99 }
yihui 0:e910d9bb040f 100 }
yihui 0:e910d9bb040f 101
yihui 0:e910d9bb040f 102 virtual void onUpdatesEnabled(uint16_t charHandle) {
yihui 0:e910d9bb040f 103 LOG("onUpdateEnabled\n\r");
yihui 0:e910d9bb040f 104 }
yihui 0:e910d9bb040f 105
yihui 0:e910d9bb040f 106 virtual void onUpdatesDisabled(uint16_t charHandle) {
yihui 0:e910d9bb040f 107 LOG("onUpdatesDisabled\n\r");
yihui 0:e910d9bb040f 108 }
yihui 0:e910d9bb040f 109
yihui 0:e910d9bb040f 110 //virtual void onConfirmationReceived(uint16_t charHandle) {}
yihui 0:e910d9bb040f 111 };
yihui 0:e910d9bb040f 112
yihui 0:e910d9bb040f 113 /**************************************************************************/
yihui 0:e910d9bb040f 114 /*!
yihui 0:e910d9bb040f 115 @brief Program entry point
yihui 0:e910d9bb040f 116 */
yihui 0:e910d9bb040f 117 /**************************************************************************/
yihui 0:e910d9bb040f 118 int main(void)
yihui 0:e910d9bb040f 119 {
yihui 0:e910d9bb040f 120
yihui 0:e910d9bb040f 121 /* Setup an event handler for GAP events i.e. Client/Server connection events. */
yihui 0:e910d9bb040f 122 nrf.getGap().setEventHandler(new GapEventHandler());
yihui 0:e910d9bb040f 123 nrf.getGattServer().setEventHandler(new GattServerEventHandler());
yihui 0:e910d9bb040f 124
yihui 0:e910d9bb040f 125 /* Initialise the nRF51822 */
yihui 0:e910d9bb040f 126 nrf.init();
yihui 0:e910d9bb040f 127
yihui 0:e910d9bb040f 128 /* Make sure we get a clean start */
yihui 0:e910d9bb040f 129 nrf.reset();
yihui 0:e910d9bb040f 130
yihui 0:e910d9bb040f 131 /* Add BLE-Only flag and complete service list to the advertising data */
yihui 0:e910d9bb040f 132 advData.addFlags(GapAdvertisingData::BREDR_NOT_SUPPORTED);
yihui 0:e910d9bb040f 133 advData.addData(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS,
yihui 0:e910d9bb040f 134 (uint8_t*)uuid16_list, sizeof(uuid16_list));
yihui 0:e910d9bb040f 135
yihui 0:e910d9bb040f 136 advData.addData(GapAdvertisingData::SHORTENED_LOCAL_NAME,
yihui 0:e910d9bb040f 137 (uint8_t*)"BLE UART", sizeof("BLE UART") - 1);
yihui 0:e910d9bb040f 138
yihui 0:e910d9bb040f 139 advData.addAppearance(GapAdvertisingData::UNKNOWN);
yihui 0:e910d9bb040f 140 nrf.getGap().setAdvertisingData(advData, scanResponse);
yihui 0:e910d9bb040f 141
yihui 0:e910d9bb040f 142 /* UART Service */
yihui 0:e910d9bb040f 143 uartService.addCharacteristic(rxCharacteristic);
yihui 0:e910d9bb040f 144 uartService.addCharacteristic(txCharacteristic);
yihui 0:e910d9bb040f 145 nrf.getGattServer().addService(uartService);
yihui 0:e910d9bb040f 146
yihui 0:e910d9bb040f 147 /* Start advertising (make sure you've added all your data first) */
yihui 0:e910d9bb040f 148 nrf.getGap().startAdvertising(advParams);
yihui 0:e910d9bb040f 149
yihui 0:e910d9bb040f 150 advertisingStateLed = 1;
yihui 0:e910d9bb040f 151
yihui 0:e910d9bb040f 152 /* Do blinky on LED1 while we're waiting for BLE events */
yihui 0:e910d9bb040f 153 for (;;) {
yihui 0:e910d9bb040f 154 led1 = !led1;
yihui 0:e910d9bb040f 155 wait(1);
yihui 0:e910d9bb040f 156 }
yihui 0:e910d9bb040f 157 }