A basic demo where a message sent over a BLE UART gets displayed on a low-power eInk display.

Dependencies:   BLE_API SharpLCD mbed nRF51822

Files at this revision

API Documentation at this revision

Comitter:
rgrover1
Date:
Tue Oct 07 09:11:57 2014 +0000
Parent:
3:fc93699018c9
Child:
5:96a3b298c4f9
Commit message:
updating to use the UARTService

Changed in this revision

BLE_API.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file
nRF51822.lib Show annotated file Show diff for this revision Revisions of this file
--- a/BLE_API.lib	Thu Aug 07 14:29:13 2014 +0000
+++ b/BLE_API.lib	Tue Oct 07 09:11:57 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#189ff241dae1
+http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#4b68a819ab4f
--- a/main.cpp	Thu Aug 07 14:29:13 2014 +0000
+++ b/main.cpp	Tue Oct 07 09:11:57 2014 +0000
@@ -16,64 +16,41 @@
 
 #include "mbed.h"
 #include "BLEDevice.h"
+#include "UARTService.h"
+
 #include "SharpLCD.hpp"
 #include "font.h"
 
-#define BLE_UUID_NUS_SERVICE            0x0001 /**< The UUID of the Nordic UART Service. */
-#define BLE_UUID_NUS_TX_CHARACTERISTIC  0x0002 /**< The UUID of the TX Characteristic. */
-#define BLE_UUID_NUS_RX_CHARACTERISTIC  0x0003 /**< The UUID of the RX Characteristic. */
-
-#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
-                               * it will have an impact on code-size and power consumption. */
-
-#if NEED_CONSOLE_OUTPUT
-Serial  pc(USBTX, USBRX);
-#define DEBUG(...) { pc.printf(__VA_ARGS__); }
-#else
-#define DEBUG(...) /* nothing */
-#endif /* #if NEED_CONSOLE_OUTPUT */
-
 BLEDevice  ble;
 DigitalOut led1(LED1);
 
-// The Nordic UART Service
-const uint8_t uart_base_uuid[]     = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5, 0x0e, 0x24, 0xdc, 0xca, 0x9e};
-const uint8_t uart_tx_uuid[]       = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5, 0x0e, 0x24, 0xdc, 0xca, 0x9e};
-const uint8_t uart_rx_uuid[]       = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5, 0x0e, 0x24, 0xdc, 0xca, 0x9e};
-const uint8_t uart_base_uuid_rev[] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x01, 0x00, 0x40, 0x6e};
-
 bool rxPayloadUpdated = false;
-uint8_t rxPayload[20] = {0,};
-uint8_t txPayload[20] = {0,};
-GattCharacteristic  rxCharacteristic (uart_tx_uuid, rxPayload, 1, sizeof(rxPayload),
-                                      GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE);
-GattCharacteristic  txCharacteristic (uart_rx_uuid, txPayload, 1, sizeof(txPayload),
-                                      GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY);
-GattCharacteristic *uartChars[] = {&rxCharacteristic, &txCharacteristic};
-GattService         uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *));
-
+const static unsigned MAX_SIZEOF_RX_PAYLOAD = 20;
+char rxPayload[MAX_SIZEOF_RX_PAYLOAD] = {0,};
 
 uint8_t framebuffer[SharpLCD::SIZEOF_FRAMEBUFFER_FOR_ALLOC];
 
-void disconnectionCallback(uint16_t handle)
+UARTService *uartServicePtr;
+
+const char *deviceName = "lcdDemo";
+SharpLCD lcd(p0 /* display enable */, SPI_PSELSS0, SPI_PSELMOSI0, SPI_PSELMISO0, SPI_PSELSCK0, NC);
+SharpLCD::FrameBuffer fb(framebuffer);
+
+void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
 {
-    DEBUG("Disconnected!\n\r");
-    DEBUG("Restarting the advertising process\n\r");
     ble.startAdvertising();
 }
 
-void onDataWritten(uint16_t charHandle)
+void onDataWritten(const GattCharacteristicWriteCBParams *params)
 {
-    if (charHandle == rxCharacteristic.getHandle()) {
-        DEBUG("onDataWritten()\n\r");
-        uint16_t bytesRead;
-        ble.readCharacteristicValue(rxCharacteristic.getHandle(), rxPayload, &bytesRead);
-        if (bytesRead < sizeof(rxPayload)) {
-            rxPayload[bytesRead] = 0;
+    if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
+        uint16_t bytesRead = params->len;
+        if (bytesRead < MAX_SIZEOF_RX_PAYLOAD) {
+            strncpy(rxPayload, (const char *)params->data, MAX_SIZEOF_RX_PAYLOAD - 1);
+            rxPayload[bytesRead] = '\0';
+            rxPayloadUpdated = true;
+            ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
         }
-        DEBUG("ECHO: %s\n\r", (char *)rxPayload);
-        ble.updateCharacteristicValue(txCharacteristic.getHandle(), rxPayload, bytesRead);
-        rxPayloadUpdated = true;
     }
 }
 
@@ -88,7 +65,6 @@
     Ticker ticker;
     ticker.attach(periodicCallback, 1);
 
-    DEBUG("Initialising the nRF51822\n\r");
     ble.init();
     ble.onDisconnection(disconnectionCallback);
     ble.onDataWritten(onDataWritten);
@@ -96,18 +72,13 @@
     /* setup advertising */
     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
-    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
-                                    (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1);
-    ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
-                                    (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid));
+    ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, (const uint8_t *)deviceName, strlen(deviceName));
 
     ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
     ble.startAdvertising();
 
-    ble.addService(uartService);
-
-    SharpLCD lcd(p21 /* display enable */, SPI_PSELSS0, SPI_PSELMOSI0, SPI_PSELMISO0, SPI_PSELSCK0, NC);
-    SharpLCD::FrameBuffer fb(framebuffer);
+    UARTService uartService(ble);
+    uartServicePtr = &uartService;
 
     lcd.enableDisplay();
     lcd.clear();
--- a/mbed.bld	Thu Aug 07 14:29:13 2014 +0000
+++ b/mbed.bld	Tue Oct 07 09:11:57 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/6213f644d804
\ No newline at end of file
+http://mbed.org/users/mbed_official/code/mbed/builds/552587b429a1
\ No newline at end of file
--- a/nRF51822.lib	Thu Aug 07 14:29:13 2014 +0000
+++ b/nRF51822.lib	Tue Oct 07 09:11:57 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#1e5c300cec7f
+http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#936d81c963fe