Eric MacDonald / Mbed 2 deprecated IoT_sensor

Test code. Blinks by default at 2 seconds. Receives single characters from PC (sensor) and transmit to "nRF Connect" on droid. Droid can send ascii to Nano. When droid sends "A", blinking is twice per second. "B" returns to slow.

Dependencies:   BLE_API mbed nRF51822

Fork of IofT_comm by Eric MacDonald

main.cpp@4:378d43fa5d20, 2017-01-14 (annotated)

Committer:
emacdonald
Date:
Sat Jan 14 18:06:41 2017 +0000
Revision:
4:378d43fa5d20
Parent:
3:b3f6c612b603
Child:
5:3384d9d80bf3
Ben, here is a simple terminal chat progam for our YSU project.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
RedBearLab 1:1c058e553423 1
RedBearLab 1:1c058e553423 2 /*
RedBearLab 1:1c058e553423 3 * The application works with the BLEController iOS/Android App.
RedBearLab 1:1c058e553423 4 * Type something from the Terminal to send
RedBearLab 1:1c058e553423 5 * to the BLEController App or vice verse.
RedBearLab 1:1c058e553423 6 * Characteristics received from App will print on Terminal.
RedBearLab 1:1c058e553423 7 */
RedBearLab 1:1c058e553423 8
RedBearLab 0:cffe8ac1bdf0 9 #include "mbed.h"
RedBearLab 2:4b66b69c7ecb 10 #include "ble/BLE.h"
RedBearLab 0:cffe8ac1bdf0 11
RedBearLab 0:cffe8ac1bdf0 12
RedBearLab 0:cffe8ac1bdf0 13 #define BLE_UUID_TXRX_SERVICE 0x0000 /**< The UUID of the Nordic UART Service. */
RedBearLab 0:cffe8ac1bdf0 14 #define BLE_UUID_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */
RedBearLab 0:cffe8ac1bdf0 15 #define BLE_UUIDS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */
RedBearLab 0:cffe8ac1bdf0 16
RedBearLab 0:cffe8ac1bdf0 17 #define TXRX_BUF_LEN 20
RedBearLab 0:cffe8ac1bdf0 18
RedBearLab 2:4b66b69c7ecb 19 BLE ble;
emacdonald 4:378d43fa5d20 20 DigitalOut led1(LED1);
RedBearLab 0:cffe8ac1bdf0 21 Serial pc(USBTX, USBRX);
RedBearLab 0:cffe8ac1bdf0 22
RedBearLab 0:cffe8ac1bdf0 23
RedBearLab 0:cffe8ac1bdf0 24 // The Nordic UART Service
RedBearLab 0:cffe8ac1bdf0 25 static const uint8_t uart_base_uuid[] = {0x71, 0x3D, 0, 0, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
RedBearLab 0:cffe8ac1bdf0 26 static const uint8_t uart_tx_uuid[] = {0x71, 0x3D, 0, 3, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
RedBearLab 0:cffe8ac1bdf0 27 static const uint8_t uart_rx_uuid[] = {0x71, 0x3D, 0, 2, 0x50, 0x3E, 0x4C, 0x75, 0xBA, 0x94, 0x31, 0x48, 0xF1, 0x8D, 0x94, 0x1E};
RedBearLab 0:cffe8ac1bdf0 28 static const uint8_t uart_base_uuid_rev[] = {0x1E, 0x94, 0x8D, 0xF1, 0x48, 0x31, 0x94, 0xBA, 0x75, 0x4C, 0x3E, 0x50, 0, 0, 0x3D, 0x71};
RedBearLab 0:cffe8ac1bdf0 29
RedBearLab 0:cffe8ac1bdf0 30
RedBearLab 0:cffe8ac1bdf0 31 uint8_t txPayload[TXRX_BUF_LEN] = {0,};
RedBearLab 0:cffe8ac1bdf0 32 uint8_t rxPayload[TXRX_BUF_LEN] = {0,};
RedBearLab 0:cffe8ac1bdf0 33
RedBearLab 0:cffe8ac1bdf0 34 static uint8_t rx_buf[TXRX_BUF_LEN];
RedBearLab 0:cffe8ac1bdf0 35 static uint8_t rx_len=0;
RedBearLab 0:cffe8ac1bdf0 36
RedBearLab 0:cffe8ac1bdf0 37
RedBearLab 0:cffe8ac1bdf0 38 GattCharacteristic txCharacteristic (uart_tx_uuid, txPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
RedBearLab 0:cffe8ac1bdf0 39
RedBearLab 0:cffe8ac1bdf0 40 GattCharacteristic rxCharacteristic (uart_rx_uuid, rxPayload, 1, TXRX_BUF_LEN, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
RedBearLab 0:cffe8ac1bdf0 41
RedBearLab 0:cffe8ac1bdf0 42 GattCharacteristic *uartChars[] = {&txCharacteristic, &rxCharacteristic};
RedBearLab 0:cffe8ac1bdf0 43
RedBearLab 0:cffe8ac1bdf0 44 GattService uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));
RedBearLab 0:cffe8ac1bdf0 45
RedBearLab 0:cffe8ac1bdf0 46
RedBearLab 0:cffe8ac1bdf0 47
RedBearLab 3:b3f6c612b603 48 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
RedBearLab 0:cffe8ac1bdf0 49 {
RedBearLab 0:cffe8ac1bdf0 50 pc.printf("Disconnected \r\n");
RedBearLab 0:cffe8ac1bdf0 51 pc.printf("Restart advertising \r\n");
RedBearLab 0:cffe8ac1bdf0 52 ble.startAdvertising();
RedBearLab 0:cffe8ac1bdf0 53 }
RedBearLab 0:cffe8ac1bdf0 54
emacdonald 4:378d43fa5d20 55 // Serial Write from BLE Read
RedBearLab 2:4b66b69c7ecb 56 void WrittenHandler(const GattWriteCallbackParams *Handler)
RedBearLab 0:cffe8ac1bdf0 57 {
RedBearLab 0:cffe8ac1bdf0 58 uint8_t buf[TXRX_BUF_LEN];
RedBearLab 0:cffe8ac1bdf0 59 uint16_t bytesRead, index;
RedBearLab 0:cffe8ac1bdf0 60
RedBearLab 2:4b66b69c7ecb 61 if (Handler->handle == txCharacteristic.getValueAttribute().getHandle())
RedBearLab 0:cffe8ac1bdf0 62 {
emacdonald 4:378d43fa5d20 63 led1 = !led1;
RedBearLab 0:cffe8ac1bdf0 64 ble.readCharacteristicValue(txCharacteristic.getValueAttribute().getHandle(), buf, &bytesRead);
RedBearLab 0:cffe8ac1bdf0 65 memset(txPayload, 0, TXRX_BUF_LEN);
RedBearLab 0:cffe8ac1bdf0 66 memcpy(txPayload, buf, TXRX_BUF_LEN);
RedBearLab 0:cffe8ac1bdf0 67 pc.printf("WriteHandler \r\n");
RedBearLab 0:cffe8ac1bdf0 68 pc.printf("Length: ");
RedBearLab 0:cffe8ac1bdf0 69 pc.putc(bytesRead);
RedBearLab 0:cffe8ac1bdf0 70 pc.printf("\r\n");
RedBearLab 0:cffe8ac1bdf0 71 pc.printf("Data: ");
RedBearLab 0:cffe8ac1bdf0 72 for(index=0; index<bytesRead; index++)
RedBearLab 0:cffe8ac1bdf0 73 {
RedBearLab 0:cffe8ac1bdf0 74 pc.putc(txPayload[index]);
RedBearLab 0:cffe8ac1bdf0 75 }
RedBearLab 0:cffe8ac1bdf0 76 pc.printf("\r\n");
RedBearLab 0:cffe8ac1bdf0 77 }
RedBearLab 0:cffe8ac1bdf0 78 }
RedBearLab 0:cffe8ac1bdf0 79
RedBearLab 0:cffe8ac1bdf0 80 void uartCB(void)
RedBearLab 0:cffe8ac1bdf0 81 {
RedBearLab 0:cffe8ac1bdf0 82 while(pc.readable())
RedBearLab 0:cffe8ac1bdf0 83 {
emacdonald 4:378d43fa5d20 84 rx_buf[rx_len++] = pc.getc();
emacdonald 4:378d43fa5d20 85 led1 = !led1;
RedBearLab 0:cffe8ac1bdf0 86 if(rx_len>=20 || rx_buf[rx_len-1]=='\0' || rx_buf[rx_len-1]=='\n')
RedBearLab 0:cffe8ac1bdf0 87 {
RedBearLab 0:cffe8ac1bdf0 88 ble.updateCharacteristicValue(rxCharacteristic.getValueAttribute().getHandle(), rx_buf, rx_len);
RedBearLab 0:cffe8ac1bdf0 89 pc.printf("RecHandler \r\n");
RedBearLab 0:cffe8ac1bdf0 90 pc.printf("Length: ");
RedBearLab 0:cffe8ac1bdf0 91 pc.putc(rx_len);
RedBearLab 0:cffe8ac1bdf0 92 pc.printf("\r\n");
RedBearLab 0:cffe8ac1bdf0 93 rx_len = 0;
RedBearLab 0:cffe8ac1bdf0 94 break;
RedBearLab 0:cffe8ac1bdf0 95 }
RedBearLab 0:cffe8ac1bdf0 96 }
RedBearLab 0:cffe8ac1bdf0 97 }
RedBearLab 0:cffe8ac1bdf0 98
emacdonald 4:378d43fa5d20 99 void periodicCallback(void)
emacdonald 4:378d43fa5d20 100 {
emacdonald 4:378d43fa5d20 101 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
emacdonald 4:378d43fa5d20 102
emacdonald 4:378d43fa5d20 103 /* Note that the periodicCallback() executes in interrupt context, so it is safer to do
emacdonald 4:378d43fa5d20 104 * heavy-weight sensor polling from the main thread. */
emacdonald 4:378d43fa5d20 105 }
emacdonald 4:378d43fa5d20 106
RedBearLab 0:cffe8ac1bdf0 107 int main(void)
RedBearLab 0:cffe8ac1bdf0 108 {
emacdonald 4:378d43fa5d20 109 led1 = 1;
emacdonald 4:378d43fa5d20 110 Ticker ticker;
emacdonald 4:378d43fa5d20 111 ticker.attach(periodicCallback, 5.0); // blink LED every second
RedBearLab 0:cffe8ac1bdf0 112 ble.init();
RedBearLab 0:cffe8ac1bdf0 113 ble.onDisconnection(disconnectionCallback);
RedBearLab 0:cffe8ac1bdf0 114 ble.onDataWritten(WrittenHandler);
RedBearLab 0:cffe8ac1bdf0 115
RedBearLab 0:cffe8ac1bdf0 116 pc.baud(9600);
RedBearLab 0:cffe8ac1bdf0 117 pc.printf("SimpleChat Init \r\n");
RedBearLab 0:cffe8ac1bdf0 118
RedBearLab 0:cffe8ac1bdf0 119 pc.attach( uartCB , pc.RxIrq);
RedBearLab 0:cffe8ac1bdf0 120 // setup advertising
RedBearLab 0:cffe8ac1bdf0 121 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
RedBearLab 0:cffe8ac1bdf0 122 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
RedBearLab 0:cffe8ac1bdf0 123 ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
emacdonald 4:378d43fa5d20 124 (const uint8_t *)"Bennett", sizeof("Bennett") - 1);
RedBearLab 0:cffe8ac1bdf0 125 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
RedBearLab 0:cffe8ac1bdf0 126 (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid));
RedBearLab 0:cffe8ac1bdf0 127 // 100ms; in multiples of 0.625ms.
RedBearLab 0:cffe8ac1bdf0 128 ble.setAdvertisingInterval(160);
RedBearLab 0:cffe8ac1bdf0 129
RedBearLab 0:cffe8ac1bdf0 130 ble.addService(uartService);
RedBearLab 0:cffe8ac1bdf0 131
RedBearLab 0:cffe8ac1bdf0 132 ble.startAdvertising();
RedBearLab 0:cffe8ac1bdf0 133 pc.printf("Advertising Start \r\n");
RedBearLab 0:cffe8ac1bdf0 134
RedBearLab 0:cffe8ac1bdf0 135 while(1)
RedBearLab 0:cffe8ac1bdf0 136 {
RedBearLab 0:cffe8ac1bdf0 137 ble.waitForEvent();
RedBearLab 0:cffe8ac1bdf0 138 }
RedBearLab 0:cffe8ac1bdf0 139 }
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