Seeed / Mbed 2 deprecated BLE_Color_Pixels

BLE Color Pixels based on nRF51822 and WS2812B

Dependencies:   BLE_API color_pixels mbed nRF51822

Fork of BLE_LCDDemo by Bluetooth Low Energy

Color pixels library using WS2812B and nRF51822 (16MHz)

http://www.seeedstudio.com/depot/bmz_cache/4/4f346dc15724a7b5a5c1383253aeefc9.image.530x397.jpg

/media/uploads/yihui/color_pixels.png

You can get the colorful led strip from seeed:

Click this link to download the color pixels app for android. The source code of the Android app is at https://github.com/Seeed-Studio/ble_color_pixels

If the BLE device is disconnected frequently, we can improve the stability by changing the BLE parameters - Advertising Duration (main.cpp), Min Interval and Max Interval (nRF51822/projectconfig.h) 

#define CFG_GAP_CONNECTION_MIN_INTERVAL_MS           20                     /**< Minimum acceptable connection interval */
#define CFG_GAP_CONNECTION_MAX_INTERVAL_MS          200                     /**< Maximum acceptable connection interval */

main.cpp@7:0e54bd52bd2d, 2015-05-05 (annotated)

Committer:
yihui
Date:
Tue May 05 05:48:40 2015 +0000
Revision:
7:0e54bd52bd2d
Parent:
4:3ce54cebbdc3 
update libraries

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 4:3ce54cebbdc3 1 /* BLE Color Pixels
rgrover1 0:6b62bf1cc2ba 2 */
rgrover1 0:6b62bf1cc2ba 3
rgrover1 0:6b62bf1cc2ba 4 #include "mbed.h"
rgrover1 0:6b62bf1cc2ba 5 #include "BLEDevice.h"
yihui 7:0e54bd52bd2d 6 #include "UARTService.h"
yihui 4:3ce54cebbdc3 7 #include "color_pixels.h"
rgrover1 0:6b62bf1cc2ba 8
rgrover1 0:6b62bf1cc2ba 9 #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console;
rgrover1 0:6b62bf1cc2ba 10 * it will have an impact on code-size and power consumption. */
rgrover1 0:6b62bf1cc2ba 11
rgrover1 0:6b62bf1cc2ba 12 #if NEED_CONSOLE_OUTPUT
rgrover1 0:6b62bf1cc2ba 13 Serial pc(USBTX, USBRX);
rgrover1 0:6b62bf1cc2ba 14 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
rgrover1 0:6b62bf1cc2ba 15 #else
rgrover1 0:6b62bf1cc2ba 16 #define DEBUG(...) /* nothing */
rgrover1 0:6b62bf1cc2ba 17 #endif /* #if NEED_CONSOLE_OUTPUT */
rgrover1 0:6b62bf1cc2ba 18
yihui 4:3ce54cebbdc3 19 ColorPixels pixels(1, 32);
yihui 4:3ce54cebbdc3 20
rgrover1 0:6b62bf1cc2ba 21 BLEDevice ble;
rgrover1 0:6b62bf1cc2ba 22 DigitalOut led1(LED1);
rgrover1 0:6b62bf1cc2ba 23
yihui 7:0e54bd52bd2d 24 UARTService *uartServicePtr;
yihui 7:0e54bd52bd2d 25
yihui 4:3ce54cebbdc3 26
yihui 4:3ce54cebbdc3 27 void processPacket(uint8_t *packet)
yihui 4:3ce54cebbdc3 28 {
yihui 4:3ce54cebbdc3 29 uint8_t red = packet[0];
yihui 4:3ce54cebbdc3 30 uint8_t green = packet[1];
yihui 4:3ce54cebbdc3 31 uint8_t blue = packet[2];
yihui 4:3ce54cebbdc3 32
yihui 4:3ce54cebbdc3 33 uint8_t mode = packet[3];
yihui 4:3ce54cebbdc3 34
yihui 4:3ce54cebbdc3 35 uint8_t number = packet[4] - 1;
yihui 4:3ce54cebbdc3 36
yihui 4:3ce54cebbdc3 37 mode = mode & 1;
yihui 4:3ce54cebbdc3 38
yihui 4:3ce54cebbdc3 39 DEBUG("r: %d, g: %d, b: %d, mode: %d\n\r", red, green, blue, mode);
yihui 4:3ce54cebbdc3 40
yihui 4:3ce54cebbdc3 41 if (mode == 0) {
yihui 4:3ce54cebbdc3 42 pixels.set_color(number, red, green, blue);
yihui 4:3ce54cebbdc3 43 pixels.update();
yihui 4:3ce54cebbdc3 44 } else if (mode == 1) {
yihui 4:3ce54cebbdc3 45 for (int i = 0; i < 32; i++) {
yihui 4:3ce54cebbdc3 46 pixels.set_color(i, red, green, blue);
yihui 4:3ce54cebbdc3 47 }
yihui 4:3ce54cebbdc3 48 pixels.update();
yihui 4:3ce54cebbdc3 49 } else if (mode == 2) {
yihui 4:3ce54cebbdc3 50
yihui 4:3ce54cebbdc3 51 } else {
yihui 4:3ce54cebbdc3 52
yihui 4:3ce54cebbdc3 53 }
yihui 4:3ce54cebbdc3 54
yihui 4:3ce54cebbdc3 55 }
rgrover1 0:6b62bf1cc2ba 56
yihui 7:0e54bd52bd2d 57 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
rgrover1 0:6b62bf1cc2ba 58 {
rgrover1 0:6b62bf1cc2ba 59 DEBUG("Disconnected!\n\r");
yihui 7:0e54bd52bd2d 60
rgrover1 0:6b62bf1cc2ba 61 DEBUG("Restarting the advertising process\n\r");
rgrover1 0:6b62bf1cc2ba 62 ble.startAdvertising();
rgrover1 0:6b62bf1cc2ba 63 }
rgrover1 0:6b62bf1cc2ba 64
yihui 7:0e54bd52bd2d 65 void onDataWritten(const GattCharacteristicWriteCBParams *params)
rgrover1 0:6b62bf1cc2ba 66 {
yihui 7:0e54bd52bd2d 67 if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
yihui 7:0e54bd52bd2d 68 uint16_t bytesRead = params->len;
yihui 7:0e54bd52bd2d 69 DEBUG("received %u bytes\n\r", bytesRead);
yihui 7:0e54bd52bd2d 70 ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
yihui 7:0e54bd52bd2d 71 processPacket((uint8_t *)params->data);
rgrover1 0:6b62bf1cc2ba 72 }
rgrover1 0:6b62bf1cc2ba 73 }
rgrover1 0:6b62bf1cc2ba 74
rgrover1 0:6b62bf1cc2ba 75 void periodicCallback(void)
rgrover1 0:6b62bf1cc2ba 76 {
rgrover1 0:6b62bf1cc2ba 77 led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */
rgrover1 0:6b62bf1cc2ba 78 }
rgrover1 0:6b62bf1cc2ba 79
rgrover1 0:6b62bf1cc2ba 80 int main(void)
rgrover1 0:6b62bf1cc2ba 81 {
rgrover1 0:6b62bf1cc2ba 82 led1 = 1;
rgrover1 0:6b62bf1cc2ba 83 Ticker ticker;
rgrover1 0:6b62bf1cc2ba 84 ticker.attach(periodicCallback, 1);
yihui 4:3ce54cebbdc3 85
yihui 4:3ce54cebbdc3 86 pixels.clear();
yihui 4:3ce54cebbdc3 87 pixels.set_color(0, 255, 0, 0);
yihui 4:3ce54cebbdc3 88 pixels.set_color(0, 0, 255, 0);
yihui 4:3ce54cebbdc3 89 pixels.set_color(0, 0, 0, 255);
yihui 4:3ce54cebbdc3 90 pixels.update();
rgrover1 0:6b62bf1cc2ba 91
rgrover1 0:6b62bf1cc2ba 92 DEBUG("Initialising the nRF51822\n\r");
rgrover1 0:6b62bf1cc2ba 93 ble.init();
rgrover1 0:6b62bf1cc2ba 94 ble.onDisconnection(disconnectionCallback);
rgrover1 0:6b62bf1cc2ba 95 ble.onDataWritten(onDataWritten);
yihui 7:0e54bd52bd2d 96
rgrover1 0:6b62bf1cc2ba 97 /* setup advertising */
rgrover1 0:6b62bf1cc2ba 98 ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
rgrover1 0:6b62bf1cc2ba 99 ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
rgrover1 0:6b62bf1cc2ba 100 ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
yihui 7:0e54bd52bd2d 101 (const uint8_t *)"Color Pixels", sizeof("Color Pixels") - 1);
rgrover1 0:6b62bf1cc2ba 102 ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
yihui 7:0e54bd52bd2d 103 (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
yihui 7:0e54bd52bd2d 104
yihui 7:0e54bd52bd2d 105 ble.setAdvertisingInterval(Gap::MSEC_TO_ADVERTISEMENT_DURATION_UNITS(1000));
rgrover1 0:6b62bf1cc2ba 106 ble.startAdvertising();
yihui 7:0e54bd52bd2d 107
yihui 7:0e54bd52bd2d 108 UARTService uartService(ble);
yihui 7:0e54bd52bd2d 109 uartServicePtr = &uartService;
yihui 7:0e54bd52bd2d 110
rgrover1 0:6b62bf1cc2ba 111 while (true) {
rgrover1 0:6b62bf1cc2ba 112 ble.waitForEvent();
rgrover1 0:6b62bf1cc2ba 113 }
rgrover1 0:6b62bf1cc2ba 114 }
yihui 4:3ce54cebbdc3 115