Interactive Device Design / Mbed 2 deprecated BLE_UART1

Code for the nRF51822. The BLE advertises, connects to a master, sends information about the status of the LDRs and receives inputs from the Master

Dependencies:   BLE_API mbed nRF51822

Fork of BLE_UART1 by StepSense

main.cpp@14:a8c2ad841fc6, 2014-11-10 (annotated)

Committer:
adarsh5723
Date:
Mon Nov 10 11:29:20 2014 +0000
Revision:
14:a8c2ad841fc6
Parent:
13:4e4ec6fe8123 
Code for the nRF51822.; The BLE advertises, connects to a master, sends information about the status of the LDRs and receives inputs from the Master

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"
adarsh5723 10:d4cd8edc6216 19 #include <string.h>
yihui 0:e910d9bb040f 20
rgrover1 6:e0fc9072e853 21 #include "UARTService.h"
yihui 0:e910d9bb040f 22
adarsh5723 10:d4cd8edc6216 23 #define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
Rohit Grover 2:e060367b9024 24 * it will have an impact on code-size and power consumption. */
yihui 0:e910d9bb040f 25
Rohit Grover 2:e060367b9024 26 #if NEED_CONSOLE_OUTPUT
rgrover1 6:e0fc9072e853 27 #define DEBUG(...) { printf(__VA_ARGS__); }
yihui 0:e910d9bb040f 28 #else
Rohit Grover 2:e060367b9024 29 #define DEBUG(...) /* nothing */
Rohit Grover 2:e060367b9024 30 #endif /* #if NEED_CONSOLE_OUTPUT */
yihui 0:e910d9bb040f 31
adarsh5723 12:51e2c29e3019 32 #define ON 1960
adarsh5723 12:51e2c29e3019 33 #define OFF 40
adarsh5723 12:51e2c29e3019 34 #define PULSE_WIDTH 2000
adarsh5723 13:4e4ec6fe8123 35 #define OUTPUT_LENGTH 35
adarsh5723 12:51e2c29e3019 36
Rohit Grover 2:e060367b9024 37 BLEDevice ble;
Rohit Grover 2:e060367b9024 38 DigitalOut led1(LED1);
adarsh5723 10:d4cd8edc6216 39 DigitalOut led2(LED2);
adarsh5723 13:4e4ec6fe8123 40 DigitalOut pwmOut(P0_30);
adarsh5723 10:d4cd8edc6216 41
adarsh5723 12:51e2c29e3019 42 AnalogIn ldr0(P0_1);
adarsh5723 12:51e2c29e3019 43 AnalogIn ldr1(P0_2);
adarsh5723 12:51e2c29e3019 44 AnalogIn ldr2(P0_3);
adarsh5723 12:51e2c29e3019 45 AnalogIn ldr3(P0_4);
adarsh5723 12:51e2c29e3019 46
adarsh5723 13:4e4ec6fe8123 47 int threshold = 0;
adarsh5723 13:4e4ec6fe8123 48
adarsh5723 14:a8c2ad841fc6 49 //Output string to indicate the status of the LDRs
adarsh5723 13:4e4ec6fe8123 50 char output[50] = "LDR0 = w x y z";
yihui 0:e910d9bb040f 51
rgrover1 6:e0fc9072e853 52 UARTService *uartServicePtr;
adarsh5723 13:4e4ec6fe8123 53 #define TIMER 0
adarsh5723 12:51e2c29e3019 54 //Creating timer Instance
adarsh5723 12:51e2c29e3019 55
adarsh5723 12:51e2c29e3019 56 Ticker ticker;
adarsh5723 12:51e2c29e3019 57 #if TIMER
adarsh5723 12:51e2c29e3019 58 long int timerCount = 0;
adarsh5723 12:51e2c29e3019 59 #endif
yihui 0:e910d9bb040f 60
rgrover1 5:4bc41267a03a 61 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
yihui 0:e910d9bb040f 62 {
Rohit Grover 2:e060367b9024 63 DEBUG("Disconnected!\n\r");
Rohit Grover 2:e060367b9024 64 DEBUG("Restarting the advertising process\n\r");
Rohit Grover 2:e060367b9024 65 ble.startAdvertising();
Rohit Grover 2:e060367b9024 66 }
yihui 0:e910d9bb040f 67
adarsh5723 14:a8c2ad841fc6 68 //Thresholding the values of the LDRs
adarsh5723 13:4e4ec6fe8123 69 void getValuesofLDR()
adarsh5723 13:4e4ec6fe8123 70 {
adarsh5723 14:a8c2ad841fc6 71 if (ldr0.read() < 0.52f)
adarsh5723 13:4e4ec6fe8123 72 output[7] = '0';
adarsh5723 13:4e4ec6fe8123 73 else
adarsh5723 13:4e4ec6fe8123 74 output[7] = '1';
adarsh5723 14:a8c2ad841fc6 75 if (ldr0.read() < 0.52f)
adarsh5723 13:4e4ec6fe8123 76 output[9] = '0';
adarsh5723 13:4e4ec6fe8123 77 else
adarsh5723 13:4e4ec6fe8123 78 output[9] = '1';
adarsh5723 14:a8c2ad841fc6 79 if (ldr0.read() < 0.52f)
adarsh5723 13:4e4ec6fe8123 80 output[11] = '0';
adarsh5723 13:4e4ec6fe8123 81 else
adarsh5723 13:4e4ec6fe8123 82 output[11] = '1';
adarsh5723 14:a8c2ad841fc6 83 if (ldr0.read() < 0.52f)
adarsh5723 13:4e4ec6fe8123 84 output[13] = '0';
adarsh5723 13:4e4ec6fe8123 85 else
adarsh5723 13:4e4ec6fe8123 86 output[13] = '1';
adarsh5723 13:4e4ec6fe8123 87
adarsh5723 13:4e4ec6fe8123 88 }
adarsh5723 13:4e4ec6fe8123 89
adarsh5723 14:a8c2ad841fc6 90 //Preparation of output string
rgrover1 6:e0fc9072e853 91 void onDataWritten(const GattCharacteristicWriteCBParams *params)
yihui 0:e910d9bb040f 92 {
adarsh5723 10:d4cd8edc6216 93 char *str = 0;
adarsh5723 10:d4cd8edc6216 94 int count = 0;
adarsh5723 10:d4cd8edc6216 95
rgrover1 6:e0fc9072e853 96 if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
rgrover1 5:4bc41267a03a 97 uint16_t bytesRead = params->len;
rgrover1 5:4bc41267a03a 98 DEBUG("received %u bytes\n\r", bytesRead);
adarsh5723 10:d4cd8edc6216 99
adarsh5723 14:a8c2ad841fc6 100 //Obtaining user command
adarsh5723 10:d4cd8edc6216 101 str = (char *)malloc((sizeof(char) * bytesRead) + 1);
adarsh5723 10:d4cd8edc6216 102 while(count <= bytesRead)
adarsh5723 10:d4cd8edc6216 103 {
adarsh5723 10:d4cd8edc6216 104 *(str + count) = *(params->data + count);
adarsh5723 10:d4cd8edc6216 105 count++;
adarsh5723 10:d4cd8edc6216 106 }
adarsh5723 10:d4cd8edc6216 107 count--;
adarsh5723 10:d4cd8edc6216 108 *(str + count) = '\0';
adarsh5723 10:d4cd8edc6216 109 DEBUG("payload = %s\n\r",str);
adarsh5723 14:a8c2ad841fc6 110
adarsh5723 14:a8c2ad841fc6 111 //Comparing user input against keywords
adarsh5723 10:d4cd8edc6216 112 if (strncmp(str,"On",bytesRead) == 0)
adarsh5723 13:4e4ec6fe8123 113 {
adarsh5723 14:a8c2ad841fc6 114 led2 = 0;
adarsh5723 14:a8c2ad841fc6 115 pwmOut = 0;
adarsh5723 13:4e4ec6fe8123 116 bytesRead = 7;
adarsh5723 13:4e4ec6fe8123 117 strncpy((char *)params->data,"Lamp On", bytesRead);
adarsh5723 13:4e4ec6fe8123 118 }
adarsh5723 13:4e4ec6fe8123 119 else if (strncmp(str,"Off",bytesRead) == 0)
adarsh5723 13:4e4ec6fe8123 120 {
adarsh5723 14:a8c2ad841fc6 121 led2 = 1;
adarsh5723 14:a8c2ad841fc6 122 pwmOut = 1;
adarsh5723 14:a8c2ad841fc6 123 bytesRead = 8;
adarsh5723 13:4e4ec6fe8123 124 strncpy((char *)params->data,"Lamp Off", bytesRead);
adarsh5723 13:4e4ec6fe8123 125 }
adarsh5723 13:4e4ec6fe8123 126 else if (strncmp(str,"Read",bytesRead) == 0)
adarsh5723 13:4e4ec6fe8123 127 {
adarsh5723 13:4e4ec6fe8123 128 bytesRead = 13;
adarsh5723 13:4e4ec6fe8123 129 getValuesofLDR();
adarsh5723 13:4e4ec6fe8123 130 strncpy((char *)params->data,output,bytesRead);
adarsh5723 13:4e4ec6fe8123 131
adarsh5723 13:4e4ec6fe8123 132 }
adarsh5723 14:a8c2ad841fc6 133 else//None of the commands match. Invalid entry
adarsh5723 13:4e4ec6fe8123 134 {
adarsh5723 13:4e4ec6fe8123 135 bytesRead = 14;
adarsh5723 13:4e4ec6fe8123 136 strncpy((char *)params->data,"Invalid Entry", bytesRead);
adarsh5723 13:4e4ec6fe8123 137 }
adarsh5723 13:4e4ec6fe8123 138 free(str);
rgrover1 6:e0fc9072e853 139 ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
yihui 0:e910d9bb040f 140 }
Rohit Grover 2:e060367b9024 141 }
yihui 0:e910d9bb040f 142
Rohit Grover 2:e060367b9024 143 void periodicCallback(void)
Rohit Grover 2:e060367b9024 144 {
adarsh5723 12:51e2c29e3019 145 #if TIMER
adarsh5723 12:51e2c29e3019 146 timerCount++;
adarsh5723 12:51e2c29e3019 147 if ((timerCount < threshold))
adarsh5723 12:51e2c29e3019 148 {
adarsh5723 12:51e2c29e3019 149 led1 = 1;
adarsh5723 12:51e2c29e3019 150 pwm_out = 1;
adarsh5723 12:51e2c29e3019 151 }
adarsh5723 12:51e2c29e3019 152 else
adarsh5723 12:51e2c29e3019 153 {
adarsh5723 12:51e2c29e3019 154 led1 = 0;
adarsh5723 12:51e2c29e3019 155 pwm_out = 0;
adarsh5723 12:51e2c29e3019 156 }
adarsh5723 12:51e2c29e3019 157 if (timerCount == PULSE_WIDTH)
adarsh5723 12:51e2c29e3019 158 timerCount = 0;
adarsh5723 12:51e2c29e3019 159 #else
rgrover1 6:e0fc9072e853 160 led1 = !led1;
adarsh5723 12:51e2c29e3019 161 #endif
adarsh5723 12:51e2c29e3019 162
Rohit Grover 2:e060367b9024 163 }
yihui 0:e910d9bb040f 164
yihui 0:e910d9bb040f 165 int main(void)
yihui 0:e910d9bb040f 166 {
Rohit Grover 2:e060367b9024 167 led1 = 1;
Rohit Grover 2:e060367b9024 168 DEBUG("Initialising the nRF51822\n\r");
adarsh5723 13:4e4ec6fe8123 169 //ticker.attach(periodicCallback, 0.00001f);
Rohit Grover 2:e060367b9024 170 ble.init();
adarsh5723 13:4e4ec6fe8123 171
Rohit Grover 2:e060367b9024 172 ble.onDisconnection(disconnectionCallback);
adarsh5723 14:a8c2ad841fc6 173
adarsh5723 14:a8c2ad841fc6 174 ble.onDataWritten(onDataWritten);
adarsh5723 13:4e4ec6fe8123 175
Rohit Grover 2:e060367b9024 176 /* setup advertising */
Rohit Grover 2:e060367b9024 177 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
Rohit Grover 2:e060367b9024 178 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
Rohit Grover 2:e060367b9024 179 ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
adarsh5723 10:d4cd8edc6216 180 (const uint8_t *)"AdarshBLE UART", sizeof("AdarshBLE UART") - 1);
Rohit Grover 2:e060367b9024 181 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
rgrover1 6:e0fc9072e853 182 (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
yihui 0:e910d9bb040f 183
Rohit Grover 2:e060367b9024 184 ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
Rohit Grover 2:e060367b9024 185 ble.startAdvertising();
yihui 0:e910d9bb040f 186
rgrover1 6:e0fc9072e853 187 UARTService uartService(ble);
rgrover1 6:e0fc9072e853 188 uartServicePtr = &uartService;
adarsh5723 14:a8c2ad841fc6 189
adarsh5723 12:51e2c29e3019 190 while (true) {
Rohit Grover 2:e060367b9024 191 ble.waitForEvent();
yihui 0:e910d9bb040f 192 }
yihui 0:e910d9bb040f 193 }