Eric MacDonald / Mbed 2 deprecated IofT_comm

This is a simple UART chat that will be used to read sensors in Sand Molds.

Dependencies:   BLE_API mbed nRF51822

Fork of nRF51822_SimpleChat by RedBearLab

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 
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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