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:
Wed Jul 30 07:57:10 2014 +0000
Child:
1:5f4043f4c997
Commit message:
Initial checkin for a demo based on BLE_UART and SharpLCD.

Changed in this revision

BLE_API.lib Show annotated file Show diff for this revision Revisions of this file
SharpLCD.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
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BLE_API.lib	Wed Jul 30 07:57:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#8559a2da6f41
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SharpLCD.lib	Wed Jul 30 07:57:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/rgrover1/code/SharpLCD/#270ee57c0367
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jul 30 07:57:10 2014 +0000
@@ -0,0 +1,134 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "BLEDevice.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
+static const uint8_t uart_base_uuid[] = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
+static const uint8_t uart_tx_uuid[]   = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
+static const uint8_t uart_rx_uuid[]   = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e};
+static 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 *));
+
+
+uint8_t framebuffer[SharpLCD::SIZEOF_FRAMEBUFFER_FOR_ALLOC];
+
+void disconnectionCallback(uint16_t handle)
+{
+    DEBUG("Disconnected!\n\r");
+    DEBUG("Restarting the advertising process\n\r");
+    ble.startAdvertising();
+}
+
+void onDataWritten(uint16_t charHandle)
+{
+    if (charHandle == rxCharacteristic.getHandle()) {
+        DEBUG("onDataWritten()\n\r");
+        uint16_t bytesRead;
+        ble.readCharacteristicValue(rxCharacteristic.getHandle(), rxPayload, &bytesRead);
+        DEBUG("ECHO: %s\n\r", (char *)rxPayload);
+        ble.updateCharacteristicValue(txCharacteristic.getHandle(), rxPayload, bytesRead);
+        rxPayloadUpdated = true;
+    }
+}
+
+void periodicCallback(void)
+{
+    led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
+}
+
+int main(void)
+{
+    led1 = 1;
+    Ticker ticker;
+    ticker.attach(periodicCallback, 1);
+
+    DEBUG("Initialising the nRF51822\n\r");
+    ble.init();
+    ble.onDisconnection(disconnectionCallback);
+    ble.onDataWritten(onDataWritten);
+
+    /* 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.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);
+
+    lcd.enableDisplay();
+    lcd.clear();
+    fb.printString(lookupFontFace("DejaVu Serif", 8),
+                   20,
+                   40,
+                   BLACK,
+                   "Init");
+    lcd.drawFrameBuffer(fb);
+
+    while (true) {
+        if (rxPayloadUpdated) {
+            fb.clear();
+            lcd.drawFrameBuffer(fb);
+            fb.printString(lookupFontFace("DejaVu Serif", 8),
+                           20,
+                           40,
+                           BLACK,
+                           (const char *)rxPayload);
+            lcd.drawFrameBuffer(fb);
+
+            rxPayloadUpdated = false;
+        }
+
+        ble.waitForEvent();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jul 30 07:57:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/6213f644d804
\ No newline at end of file
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nRF51822.lib	Wed Jul 30 07:57:10 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#1e5c300cec7f