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osmand-display.ino
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osmand-display.ino
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#include <GyverPower.h>
#include <powerConstants.h>
#include <stdio.h>
#include "src/epd1in54_V2.h"
#include "src/epdpaint.h"
#include "commands.h"
#include "turns.h"
#include "prescaler.h"
#define BLUETOOTH_VCC_PIN 2
Epd display;
uint8_t partialRefreshesCount;
uint8_t readCommand;
DirectionCommandData *directionCommandData;
uint8_t frameDataCommandDataSize;
uint8_t frameDataCommandDataBuffer[COMMAND_FRAME_DATA_MAX_SIZE];
void setup()
{
powerOnSetup();
}
void powerOnSetup()
{
pinMode(BLUETOOTH_VCC_PIN, OUTPUT);
digitalWrite(BLUETOOTH_VCC_PIN, HIGH);
power.setSleepMode(POWERDOWN_SLEEP);
power.setSystemPrescaler(SYSTEM_PRESCALER);
Serial.begin(38400 * SYSTEM_CLOCK_DIVIDER);
Serial.println(F("powerOnSetup(): serial_set_up"));
Serial.print(F("powerOnSetup(): prescaler_set: divider="));
Serial.println((uint32_t)SYSTEM_CLOCK_DIVIDER);
displayClear();
Serial.println(F("powerOnSetup(): display_cleared"));
}
void loop()
{
tryToReadCommand();
switch (readCommand)
{
case COMMAND_DIRECTION:
displayShowDirection();
break;
case COMMAND_CLEAR:
displayClear();
break;
case COMMAND_FRAME_PREPARE:
displayPrepareForFrame();
break;
case COMMAND_FRAME_DATA:
displayWriteFrameData();
break;
case COMMAND_FRAME_SHOW:
displayShowFrame();
break;
default:
break;
}
readCommand = 0;
}
void tryToReadCommand()
{
if (Serial.available())
{
uint8_t command = Serial.read();
bool unknownCommand = false;
bool commandReadSuccessfully = false;
switch (command)
{
case COMMAND_DIRECTION:
Serial.println(F("tryToReadCommand(): command_read: command=DIRECTION"));
commandReadSuccessfully = readDirectionCommandData();
break;
case COMMAND_CLEAR:
Serial.println(F("tryToReadCommand(): command_read: command=CLEAR"));
commandReadSuccessfully = true;
break;
case COMMAND_FRAME_PREPARE:
Serial.println(F("tryToReadCommand(): command_read: command=FRAME_PREPARE"));
commandReadSuccessfully = true;
break;
case COMMAND_FRAME_DATA:
// Logging through the Serial while receiving a data burst
// breaks everything.
// Serial.println(F("tryToReadCommand(): command_read: command=FRAME_DATA"));
commandReadSuccessfully = readFrameDataCommandData();
break;
case COMMAND_FRAME_SHOW:
Serial.println(F("tryToReadCommand(): command_read: command=FRAME_SHOW"));
commandReadSuccessfully = true;
break;
default:
unknownCommand = true;
Serial.print(F("tryToReadCommand(): unknown_command_read: command="));
Serial.println(command, HEX);
break;
}
if (!unknownCommand)
{
if (!commandReadSuccessfully)
{
Serial.println(F("tryToReadCommand(): command_data_read_failed"));
}
else
{
readCommand = command;
}
}
}
}
bool readDirectionCommandData()
{
uint8_t size = sizeof(DirectionCommandData);
if (Serial.available() < size)
{
Serial.print(F("readDirectionCommandData(): insufficient_bytes_available: required="));
Serial.println(size);
return false;
}
uint8_t dataBuffer[size];
for (uint8_t i = 0; i < size; i++)
{
dataBuffer[i] = Serial.read();
}
directionCommandData = (DirectionCommandData *)dataBuffer;
Serial.print(F("readDirectionCommandData(): data_read: turnType="));
Serial.print(directionCommandData->turnType);
Serial.print(F(", distanceM="));
Serial.println(directionCommandData->distanceM);
return true;
}
bool readFrameDataCommandData()
{
// TODO: Introduce timeout.
while (Serial.available() == 0)
{
delay(1);
}
uint8_t bufferSize = Serial.read();
if (bufferSize > COMMAND_FRAME_DATA_MAX_SIZE)
{
Serial.print(F("readFrameDataCommandData(): size_too_large: max="));
Serial.println(COMMAND_FRAME_DATA_MAX_SIZE);
return false;
}
// Logging through the Serial while receiving a data burst
// breaks everything.
// Serial.print(F("readFrameDataCommandData(): size_read: size="));
// Serial.println(bufferSize);
frameDataCommandDataSize = bufferSize;
for (int i = 0; i < bufferSize; i++)
{
// TODO: Introduce timeout.
while (Serial.available() == 0)
{
delay(1);
}
frameDataCommandDataBuffer[i] = Serial.read();
}
// Logging through the Serial while receiving a data burst
// breaks everything.
// Serial.println(F("readFrameDataCommandData(): data_read"));
return true;
}
void initDisplayAndClearMemory(bool partial)
{
display.Init(partial);
display.ClearMemory();
}
void powerOffDisplay()
{
display.Sleep();
display.PowerOff();
}
void displayClear()
{
initDisplayAndClearMemory(false);
Serial.println(F("displayClear(): display_initialized"));
// Reliable cleanup.
for (int i = 0; i < 3; i++)
{
display.DisplayFrameInversed();
}
powerOffDisplay();
Serial.println(F("displayClear(): done"));
}
void displayShowDirection()
{
bool partial = partialRefreshesCount != 5;
partialRefreshesCount = (partialRefreshesCount + 1) % 6;
initDisplayAndClearMemory(partial);
Serial.print(F("displayShowDirection(): display_initialized: partial="));
Serial.println(partial);
const uint8_t turnImageTop = 12;
const uint8_t distanceStringTop = EPD_HEIGHT - 40 - 12;
#pragma region Display turn
switch (directionCommandData->turnType)
{
// C, continue
case 1:
display.SetFrameMemory(turn_c.data_pgm, true, (EPD_WIDTH - turn_c.width) / 2, turnImageTop,
turn_c.width, turn_c.height, false);
break;
// TL, turn left
case 2:
display.SetFrameMemory(turn_tl.data_pgm, true, (EPD_WIDTH - turn_tl.width) / 2, turnImageTop,
turn_tl.width, turn_tl.height, false);
break;
// TSLL, turn slightly left
case 3:
display.SetFrameMemory(turn_tsll.data_pgm, true, (EPD_WIDTH - turn_tsll.width) / 2, turnImageTop,
turn_tsll.width, turn_tsll.height, false);
break;
// TSHLL, turn sharp left
case 4:
display.SetFrameMemory(turn_tshl.data_pgm, true, (EPD_WIDTH - turn_tshl.width) / 2, turnImageTop,
turn_tshl.width, turn_tshl.height, false);
break;
// TR, turn right
case 5:
display.SetFrameMemory(turn_tl.data_pgm, true, (EPD_WIDTH - turn_tl.width) / 2, turnImageTop,
turn_tl.width, turn_tl.height, true);
break;
// TSLR, turn slightly right
case 6:
display.SetFrameMemory(turn_tsll.data_pgm, true, (EPD_WIDTH - turn_tsll.width) / 2, turnImageTop,
turn_tsll.width, turn_tsll.height, true);
break;
// TSHLL, turn sharp right
case 7:
display.SetFrameMemory(turn_tshl.data_pgm, true, (EPD_WIDTH - turn_tshl.width) / 2, turnImageTop,
turn_tshl.width, turn_tshl.height, true);
break;
// TU, U-turn
case 10:
display.SetFrameMemory(turn_tu.data_pgm, true, (EPD_WIDTH - turn_tu.width) / 2, turnImageTop,
turn_tu.width, turn_tu.height, false);
break;
// TRU, right U-turn
case 11:
display.SetFrameMemory(turn_tu.data_pgm, true, (EPD_WIDTH - turn_tu.width) / 2, turnImageTop,
turn_tu.width, turn_tu.height, true);
break;
// Not supported – small black square
default:
unsigned char empty[] = {0xFF, 0XFF};
display.SetFrameMemory(empty, false, 98, turnImageTop, 4, 4, false);
break;
}
#pragma endregion
#pragma region Display distance
char distanceString[20];
// For more than 945 meters show kilometers
if (directionCommandData->distanceM > 945)
{
// Round the distance in kilometers to the first decimal place.
uint8_t intPart = directionCommandData->distanceM / 1000;
uint16_t decimalPart = directionCommandData->distanceM % 1000 + 1000;
while (decimalPart > 100)
{
uint8_t rem = decimalPart % 10;
decimalPart /= 10;
if (rem >= 5)
{
decimalPart++;
}
}
// If the decimal part rounding leads to the int part increment.
if (decimalPart == 20)
{
intPart++;
}
decimalPart %= 10;
if (decimalPart != 0)
{
sprintf(distanceString, "%d.%d km", intPart, decimalPart);
}
else
{
sprintf(distanceString, "%d km", intPart);
}
}
else if (directionCommandData->distanceM > 2)
{
sprintf(distanceString, "%d m", directionCommandData->distanceM);
}
else
{
sprintf(distanceString, "now");
}
unsigned char distanceStringWidth = Paint::MeasureString(distanceString, &FontSegoeUI36);
unsigned char frameBuffer[1024];
Paint paint(frameBuffer, EPD_WIDTH, FontSegoeUI36.height);
paint.Clear(UNCOLORED);
paint.DrawStringAt((paint.GetWidth() - distanceStringWidth) / 2, 0, distanceString, &FontSegoeUI36, COLORED);
display.SetFrameMemory(paint.GetImage(), false, 0, 160, paint.GetWidth(), paint.GetHeight(), false);
#pragma endregion
display.DisplayFrameInversed();
powerOffDisplay();
Serial.println(F("displayShowDirection(): done"));
}
void displayPrepareForFrame()
{
display.Init(false);
Serial.println(F("displayPrepareForFrame(): display_initialized"));
display.SendCommand(WRITE_BLACK_RAM);
Serial.println(F("displayPrepareForFrame(): done"));
}
void displayWriteFrameData()
{
// TODO: Check if the display is prepared for the frame.
for (int i = 0; i < frameDataCommandDataSize; i++)
{
display.SendData(frameDataCommandDataBuffer[i]);
}
// Logging through the Serial while receiving a data burst
// breaks everything.
// Serial.print(F("displayWriteFrameData(): done: bytes_written="));
// Serial.println(frameDataCommandDataSize);
}
void displayShowFrame()
{
// TODO: Check if the display is prepared for the frame.
display.DisplayFrame();
powerOffDisplay();
Serial.println(F("displayShowFrameFromSerial(): done"));
}