Nordic Pucks
BLE-writeable Display Puck with an e-paper display. Built on the Puck IOT platform.
Dependencies: Puck lz mbed seeedstudio-epaper
The Display puck is a puck with an e-paper display that can show arbitrary black and white images received over Bluetooth LE.
A tutorial for the Display Puck is available on GitHub.
Tutorials and in-depth documentation for the Puck platform is available at the project's GitHub page
Revision 3:4ff226c4fe2a, committed 2014-07-29
- Comitter:
- sigveseb
- Date:
- Tue Jul 29 14:03:29 2014 +0000
- Parent:
- 2:ea2c1ab55f20
- Child:
- 4:cfb711a2c71f
- Commit message:
- Update display puck to use new puck lib
Changed in this revision
--- a/BLE_API.lib Fri Jul 18 09:22:36 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/teams/Bluetooth-Low-Energy/code/BLE_API/#8890715aaf55
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Puck.lib Tue Jul 29 14:03:29 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/Nordic-Pucks/code/Puck/#ba0527c6b6d0
--- a/display_service.cpp Fri Jul 18 09:22:36 2014 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,20 +0,0 @@
-#include "BLEDevice.h"
-
-uint8_t uuid_array_service[16] = {'b', 'f', 't', 'j', ' ', 'd', 'i', 's', 'p', 'l', 'a', 'y', ' ', ' ', ' ', ' '};
-uint8_t uuid_array_command[16] = {'b', 'f', 't', 'j', ' ', 'd', 'i', 's', 'p', 'l', 'a', 'y', ' ', 'c', 'o', 'm'};
-uint8_t uuid_array_data[16] = {'b', 'f', 't', 'j', ' ', 'd', 'i', 's', 'p', 'l', 'a', 'y', ' ', 'd', 'a', 't'};
-
-const UUID uuid_service = UUID(uuid_array_service);
-const UUID uuid_command = UUID(uuid_array_command);
-const UUID uuid_data = UUID(uuid_array_data);
-
-uint8_t command_data[1];
-uint16_t command_data_length = 1;
-uint8_t data_data[20];
-uint16_t data_data_length = 20;
-
-GattCharacteristic command = GattCharacteristic(uuid_command, command_data, sizeof(command_data), sizeof(command_data), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
-GattCharacteristic data = GattCharacteristic(uuid_data, data_data, sizeof(data_data), sizeof(data_data), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ);
-
-GattCharacteristic *characteristics[] = {&command, &data};
-GattService display_service = GattService(uuid_service, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *));
\ No newline at end of file
--- a/lz.lib Fri Jul 18 09:22:36 2014 +0000 +++ b/lz.lib Tue Jul 29 14:03:29 2014 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/teams/Nordic-Pucks/code/lz/#ce4be867658b +http://mbed.org/teams/Nordic-Pucks/code/lz/#0c9aeae76ab2
--- a/main.cpp Fri Jul 18 09:22:36 2014 +0000
+++ b/main.cpp Tue Jul 29 14:03:29 2014 +0000
@@ -1,14 +1,22 @@
#include <mbed.h>
-#include <EPD.h>
-#include "mbed.h"
-#include "BLEDevice.h"
+#include "EPD.h"
#include "lz.h"
-Serial py(USBTX, USBRX);
-BLEDevice ble;
-DigitalOut myled(LED1);
+
+#define LOG_LEVEL_VERBOSE
+#include "Puck.h"
+
+int receiveIndex = 0;
+
+Puck* puck = &Puck::getPuck();
-int receive_index = 0;
+
+EPD_Class EPD(p0, p2, p3, p8, p5, p6, p7);
+
+
+const UUID DISPLAY_SERVICE_UUID = UUID(stringToUUID("bftj display "));
+const UUID COMMAND_UUID = UUID(stringToUUID("bftj display com"));
+const UUID DATA_UUID = UUID(stringToUUID("bftj display dat"));
/*
@@ -47,183 +55,102 @@
#define COMMAND_BEGIN_UPPER 4
#define COMMAND_BEGIN_LOWER 5
-//#define IMAGE_SIZE 5808
-//#define Y_SIZE 176
-//#define X_SIZE 264
#define IMAGE_SIZE 2904
+#define BUFFER_SIZE 2917
#define Y_SIZE 88
#define X_SIZE 264
-#define RECEIVE_BUFFER_SIZE 1000
-uint8_t image[IMAGE_SIZE];
-uint8_t receive_buffer[RECEIVE_BUFFER_SIZE];
+uint8_t buffer[BUFFER_SIZE];
+
+int currentCommand = COMMAND_NOOP;
+
+
+void reverseBufferSegment(int from, int to) {
+ for(int i = from; i < (to + from + 1) / 2; i++) {
+ int i2 = to + from - i - 1;
+ int temp = buffer[i];
+ buffer[i] = buffer[i2];
+ buffer[i2] = temp;
+ }
+ LOG_DEBUG("Reversed buffer from index %i to index %i.\n", from, to);
+}
+
-extern GattService display_service;
-extern GattCharacteristic command, data;
-int current_command = COMMAND_NOOP;
-
-bool isConnected = false;
-bool isAdvertising = false;
-
-const static uint8_t beaconPayload[] = {
- 0x00, 0x4C, // Company identifier code (0x004C == Apple)
- 0x02, // ID
- 0x15, // length of the remaining payload
- 0xE2, 0x0A, 0x39, 0xF4, 0x73, 0xF5, 0x4B, 0xC4, // UUID
- 0xA1, 0x2F, 0x17, 0xD1, 0xAD, 0x07, 0xA9, 0x61,
- 0x13, 0x37, // the major value to differenciate a location
- 0xFA, 0xCC, // the minor value to differenciate a location
- 0xC0 // 2's complement of the Tx power (-56dB) (now modified)
-};
-
-void onDataWritten(uint16_t handle)
-{
- for (int i = 0; i < display_service.getCharacteristicCount(); i++) {
- GattCharacteristic* characteristic = display_service.getCharacteristic(i);
- characteristic->getMaxLength();
- if (characteristic->getHandle() == handle) {
- uint16_t max_length = characteristic->getMaxLength();
- ble.readCharacteristicValue(handle, characteristic->getValuePtr(), &max_length);
+void onCommandWritten(uint8_t* value) {
+ currentCommand = value[0];
+ LOG_DEBUG("Received command: %i.\n", currentCommand);
+
+ switch(currentCommand) {
+
+ case COMMAND_BEGIN_UPPER:
+ case COMMAND_BEGIN_LOWER:
+ receiveIndex = BUFFER_SIZE;
+ break;
+
+ case COMMAND_CLEAR:
+ LOG_INFO("Clearing display.\n");
+ EPD.begin(EPD_2_7);
+ EPD.start();
+ EPD.clear();
+ EPD.end();
break;
- }
+
+ case COMMAND_IMAGE_UPPER:
+ LOG_INFO("Writing image to top half of display.\n");
+ reverseBufferSegment(receiveIndex, BUFFER_SIZE);
+ LOG_DEBUG("LZ_Uncompress(in: 0x%x, out 0x%x, insize: %i)\n", buffer + receiveIndex, buffer, BUFFER_SIZE - receiveIndex);
+ LZ_Uncompress(buffer + receiveIndex, buffer, BUFFER_SIZE - receiveIndex);
+ LOG_INFO("Uncompressed %i bytes of data.\n", BUFFER_SIZE - receiveIndex);
+ EPD.begin(EPD_2_7);
+ EPD.start();
+ EPD.image(buffer, 0, EPD.lines_per_display / 2);
+ EPD.end();
+ break;
+
+ case COMMAND_IMAGE_LOWER:
+ LOG_INFO("Writing image to bottom half of display.\n");
+ reverseBufferSegment(receiveIndex, BUFFER_SIZE);
+ LZ_Uncompress(buffer + receiveIndex, buffer, BUFFER_SIZE - receiveIndex);
+ LOG_INFO("Uncompressed %i bytes of data.\n", BUFFER_SIZE - receiveIndex);
+ EPD.begin(EPD_2_7);
+ EPD.start();
+ EPD.image(buffer, EPD.lines_per_display / 2, EPD.lines_per_display);
+ EPD.end();
+ break;
+
}
- if (command.getHandle() == handle) {
- current_command = command.getValuePtr()[0];
-
-
- py.printf("cmd: %i\n", current_command);
-
- if(current_command == COMMAND_BEGIN_UPPER || current_command == COMMAND_BEGIN_LOWER) {
- receive_index = 0;
- }
- }
-
- if (data.getHandle() == handle) {
- uint8_t* value = data.getValuePtr();
- for(int i = 0; i < 20 && receive_index < IMAGE_SIZE; i++) {
- receive_buffer[receive_index++] = value[i];
- }
- if (receive_index == IMAGE_SIZE) {
- receive_index = 0;
- }
+ currentCommand = COMMAND_NOOP;
+}
+
+void onDataWritten(uint8_t* value) {
+ LOG_VERBOSE("Data written, receiveIndex: %i\n", receiveIndex);
+ for(int i = 0; i < 20 && receiveIndex > 0; i++) {
+ buffer[--receiveIndex] = value[i];
}
}
-void disconnectionCallback(void)
-{
- py.printf("Disconnected!\n");
- isConnected = false;
-}
-
- void connectionCallback(void)
-{
- py.printf("Connected!\n");
- isConnected = true;
- isAdvertising = false;
-}
-
-void uncompress_image() {
- LZ_Uncompress(receive_buffer, image, receive_index);
-}
-
-//uint8_t image[5808];
-
-void clear(){
- for(int i=0;i<IMAGE_SIZE;i++){
- image[i] = 0;
- }
-}
-
-void set_pixel(int x, int y, int color) {
- int byte_x = x / 8;
- int byte_w = X_SIZE / 8;
- int byte_offset = x % 8;
- int byte = image[byte_x + byte_w * y];
- if(color) {
- byte |= 1 << byte_offset;
- } else {
- byte &= ~(1 << byte_offset);
- }
- image[byte_x + byte_w * y] = byte;
-}
int main() {
+ LOG_INFO("Starting puck.\n");
+
DigitalOut SD_CS(p4);
DigitalOut WORD_STOCK_CS(p26);
SD_CS = 1;
WORD_STOCK_CS = 1;
- clear();
-
- EPD_Class EPD(p0, p2, p3, p8, p5, p6, p7);
+ puck->addCharacteristic(DISPLAY_SERVICE_UUID, COMMAND_UUID, 1);
+ puck->addCharacteristic(DISPLAY_SERVICE_UUID, DATA_UUID, 20);
- EPD.begin(EPD_2_7);
- EPD.start();
- EPD.clear();
- EPD.end();
- ble.init();
- ble.onDisconnection(disconnectionCallback);
- ble.onConnection(connectionCallback);
- ble.onDataWritten(onDataWritten);
+ puck->onCharacteristicWrite(&COMMAND_UUID, onCommandWritten);
+ puck->onCharacteristicWrite(&DATA_UUID, onDataWritten);
-
- ble.addService(display_service);
+ puck->init(0x5EED);
- myled = 1;
+ puck->countFreeMemory();
- py.printf("Starting up.\n");
-
- current_command = COMMAND_NOOP;
+ currentCommand = COMMAND_NOOP;
- while (true) {
- ble.waitForEvent();
- myled = !myled;
-
- if(current_command == COMMAND_CLEAR) {
-
- py.printf("Clearing.\n");
- EPD.begin(EPD_2_7);
- EPD.start();
- EPD.clear();
- EPD.end();
- current_command = COMMAND_NOOP;
- }
-
-
- if(current_command == COMMAND_IMAGE_UPPER) {
- py.printf("Uppering.\n");
- uncompress_image();
- EPD.begin(EPD_2_7);
- EPD.start();
- EPD.image(image, 0, EPD.lines_per_display / 2);
- EPD.end();
- current_command = COMMAND_NOOP;
- }
-
-
- if(current_command == COMMAND_IMAGE_LOWER) {
- py.printf("Lowering.\n");
- uncompress_image();
- EPD.begin(EPD_2_7);
- EPD.start();
- EPD.image(image, EPD.lines_per_display / 2, EPD.lines_per_display);
- EPD.end();
- current_command = COMMAND_NOOP;
- }
-
-
- if(!isConnected && !isAdvertising) {
- ble.clearAdvertisingPayload();
- ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
- ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
- ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
- ble.accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA,
- beaconPayload, sizeof(beaconPayload));
- ble.startAdvertising();
- py.printf("Restarting the advertising process\n");
- isAdvertising = true;
- }
- }
+ while (puck->drive());
}
\ No newline at end of file
--- a/nRF51822.lib Fri Jul 18 09:22:36 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/teams/Nordic-Semiconductor/code/nRF51822/#bd0186ce644a