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Ben V. Brown
322
workspace/TS100/Core/Src/OLED.cpp
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322
workspace/TS100/Core/Src/OLED.cpp
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/*
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* OLED.cpp
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*
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* Created on: 29Aug.,2017
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* Author: Ben V. Brown
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*/
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#include <string.h>
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#include <OLED.hpp>
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#include <stdlib.h>
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#include "Translation.h"
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#include "cmsis_os.h"
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const uint8_t* OLED::currentFont; // Pointer to the current font used for
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// rendering to the buffer
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uint8_t* OLED::firstStripPtr; // Pointers to the strips to allow for buffer
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// having extra content
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uint8_t* OLED::secondStripPtr; // Pointers to the strips
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bool OLED::inLeftHandedMode; // Whether the screen is in left or not (used for
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// offsets in GRAM)
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bool OLED::displayOnOffState; // If the display is on or not
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uint8_t OLED::fontWidth, OLED::fontHeight;
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int16_t OLED::cursor_x, OLED::cursor_y;
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uint8_t OLED::displayOffset;
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uint8_t OLED::screenBuffer[16 + (OLED_WIDTH * 2) + 10]; // The data buffer
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/*Setup params for the OLED screen*/
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/*http://www.displayfuture.com/Display/datasheet/controller/SSD1307.pdf*/
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/*All commands are prefixed with 0x80*/
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/*Data packets are prefixed with 0x40*/
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uint8_t OLED_Setup_Array[] = {
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/**/
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0x80, 0xAE, /*Display off*/
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0x80, 0xD5, /*Set display clock divide ratio / osc freq*/
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0x80, 0x52, /*Divide ratios*/
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0x80, 0xA8, /*Set Multiplex Ratio*/
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0x80, 0x0F, /*16 == max brightness,39==dimmest*/
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0x80, 0xC0, /*Set COM Scan direction*/
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0x80, 0xD3, /*Set vertical Display offset*/
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0x80, 0x00, /*0 Offset*/
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0x80, 0x40, /*Set Display start line to 0*/
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0x80, 0xA0, /*Set Segment remap to normal*/
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0x80, 0x8D, /*Charge Pump*/
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0x80, 0x14, /*Charge Pump settings*/
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0x80, 0xDA, /*Set VCOM Pins hardware config*/
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0x80, 0x02, /*Combination 2*/
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0x80, 0x81, /*Contrast*/
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0x80, 0x33, /*^51*/
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0x80, 0xD9, /*Set pre-charge period*/
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0x80, 0xF1, /*Pre charge period*/
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0x80, 0xDB, /*Adjust VCOMH regulator ouput*/
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0x80, 0x30, /*VCOM level*/
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0x80, 0xA4, /*Enable the display GDDR*/
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0x80, 0XA6, /*Normal display*/
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0x80, 0x20, /*Memory Mode*/
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0x80, 0x00, /*Wrap memory*/
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0x80, 0xAF /*Display on*/
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};
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// Setup based on the SSD1307 and modified for the SSD1306
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const uint8_t REFRESH_COMMANDS[17] = { 0x80, 0xAF, 0x80, 0x21, 0x80, 0x20, 0x80,
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0x7F, 0x80, 0xC0, 0x80, 0x22, 0x80, 0x00, 0x80, 0x01, 0x40 };
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void OLED::initialize() {
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cursor_x = cursor_y = 0;
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currentFont = USER_FONT_12;
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fontWidth = 12;
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inLeftHandedMode = false;
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firstStripPtr = &screenBuffer[FRAMEBUFFER_START];
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secondStripPtr = &screenBuffer[FRAMEBUFFER_START + OLED_WIDTH];
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fontHeight = 16;
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displayOffset = 0;
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displayOnOffState = true;
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memcpy(&screenBuffer[0], &REFRESH_COMMANDS[0], sizeof(REFRESH_COMMANDS));
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HAL_Delay(50);
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HAL_GPIO_WritePin(OLED_RESET_GPIO_Port, OLED_RESET_Pin, GPIO_PIN_SET);
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HAL_Delay(50);
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// Send the setup settings
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FRToSI2C::Transmit(DEVICEADDR_OLED, (uint8_t*) OLED_Setup_Array,
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sizeof(OLED_Setup_Array));
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displayOnOff(true);
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}
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/*
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* Prints a char to the screen.
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* UTF font handling is done using the two input chars.
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* Precursor is the command char that is used to select the table.
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*/
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void OLED::drawChar(char c) {
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if (c == '\x01' && cursor_y == 0) { // 0x01 is used as new line char
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cursor_x = 0;
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cursor_y = 8;
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return;
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} else if (c == 0) {
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return;
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}
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uint16_t index = c - 2; //First index is \x02
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uint8_t* charPointer;
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charPointer = ((uint8_t*) currentFont)
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+ ((fontWidth * (fontHeight / 8)) * index);
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drawArea(cursor_x, cursor_y, fontWidth, fontHeight, charPointer);
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cursor_x += fontWidth;
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}
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void OLED::setRotation(bool leftHanded) {
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#ifdef MODEL_TS80
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leftHanded = !leftHanded;
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#endif
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if (inLeftHandedMode == leftHanded) {
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return;
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}
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// send command struct again with changes
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if (leftHanded) {
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OLED_Setup_Array[11] = 0xC8; // c1?
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OLED_Setup_Array[19] = 0xA1;
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} else {
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OLED_Setup_Array[11] = 0xC0;
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OLED_Setup_Array[19] = 0xA0;
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}
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FRToSI2C::Transmit(DEVICEADDR_OLED, (uint8_t*) OLED_Setup_Array,
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sizeof(OLED_Setup_Array));
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inLeftHandedMode = leftHanded;
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screenBuffer[5] = inLeftHandedMode ? 0 : 32; // display is shifted by 32 in left handed
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// mode as driver ram is 128 wide
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screenBuffer[7] = inLeftHandedMode ? 95 : 0x7F; // End address of the ram segment we are writing to (96 wide)
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screenBuffer[9] = inLeftHandedMode ? 0xC8 : 0xC0;
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}
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// print a string to the current cursor location
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void OLED::print(const char* str) {
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while (str[0]) {
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drawChar(str[0]);
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str++;
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}
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}
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void OLED::setFont(uint8_t fontNumber) {
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if (fontNumber == 1) {
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// small font
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currentFont = USER_FONT_6x8;
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fontHeight = 8;
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fontWidth = 6;
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} else if (fontNumber == 2) {
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currentFont = ExtraFontChars;
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fontHeight = 16;
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fontWidth = 12;
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} else {
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currentFont = USER_FONT_12;
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fontHeight = 16;
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fontWidth = 12;
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}
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}
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// maximum places is 5
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void OLED::printNumber(uint16_t number, uint8_t places) {
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char buffer[7] = { 0 };
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if (places >= 5) {
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buffer[5] = 2 + number % 10;
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number /= 10;
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}
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if (places > 4) {
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buffer[4] = 2 + number % 10;
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number /= 10;
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}
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if (places > 3) {
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buffer[3] = 2 + number % 10;
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number /= 10;
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}
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if (places > 2) {
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buffer[2] = 2 + number % 10;
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number /= 10;
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}
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if (places > 1) {
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buffer[1] = 2 + number % 10;
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number /= 10;
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}
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buffer[0] = 2 + number % 10;
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number /= 10;
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print(buffer);
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}
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void OLED::debugNumber(int32_t val) {
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if (abs(val) > 99999) {
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OLED::print(SymbolSpace); // out of bounds
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return;
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}
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if (val >= 0) {
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OLED::print(SymbolSpace);
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OLED::printNumber(val, 5);
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} else {
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OLED::print(SymbolMinus);
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OLED::printNumber(-val, 5);
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}
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}
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void OLED::drawSymbol(uint8_t symbolID) {
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// draw a symbol to the current cursor location
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setFont(2);
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drawChar(symbolID + 2);
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setFont(0);
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}
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// Draw an area, but y must be aligned on 0/8 offset
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void OLED::drawArea(int16_t x, int8_t y, uint8_t wide, uint8_t height,
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const uint8_t* ptr) {
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// Splat this from x->x+wide in two strides
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if (x <= -wide)
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return; // cutoffleft
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if (x > 96)
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return; // cutoff right
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uint8_t visibleStart = 0;
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uint8_t visibleEnd = wide;
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// trimming to draw partials
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if (x < 0) {
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visibleStart -= x; // subtract negative value == add absolute value
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}
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if (x + wide > 96) {
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visibleEnd = 96 - x;
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}
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if (y == 0) {
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// Splat first line of data
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for (uint8_t xx = visibleStart; xx < visibleEnd; xx++) {
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firstStripPtr[xx + x] = ptr[xx];
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}
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}
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if (y == 8 || height == 16) {
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// Splat the second line
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for (uint8_t xx = visibleStart; xx < visibleEnd; xx++) {
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secondStripPtr[x + xx] = ptr[xx + (height == 16 ? wide : 0)];
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}
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}
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}
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void OLED::fillArea(int16_t x, int8_t y, uint8_t wide, uint8_t height,
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const uint8_t value) {
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// Splat this from x->x+wide in two strides
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if (x <= -wide)
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return; // cutoffleft
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if (x > 96)
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return; // cutoff right
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uint8_t visibleStart = 0;
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uint8_t visibleEnd = wide;
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// trimming to draw partials
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if (x < 0) {
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visibleStart -= x; // subtract negative value == add absolute value
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}
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if (x + wide > 96) {
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visibleEnd = 96 - x;
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}
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if (y == 0) {
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// Splat first line of data
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for (uint8_t xx = visibleStart; xx < visibleEnd; xx++) {
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firstStripPtr[xx + x] = value;
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}
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}
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if (y == 8 || height == 16) {
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// Splat the second line
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for (uint8_t xx = visibleStart; xx < visibleEnd; xx++) {
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secondStripPtr[x + xx] = value;
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}
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}
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}
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void OLED::drawFilledRect(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1,
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bool clear) {
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// Draw this in 3 sections
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// This is basically a N wide version of vertical line
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// Step 1 : Draw in the top few pixels that are not /8 aligned
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// LSB is at the top of the screen
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uint8_t mask = 0xFF;
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if (y0) {
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mask = mask << (y0 % 8);
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for (uint8_t col = x0; col < x1; col++)
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if (clear)
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firstStripPtr[(y0 / 8) * 96 + col] &= ~mask;
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else
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firstStripPtr[(y0 / 8) * 96 + col] |= mask;
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}
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// Next loop down the line the total number of solids
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if (y0 / 8 != y1 / 8)
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for (uint8_t col = x0; col < x1; col++)
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for (uint8_t r = (y0 / 8); r < (y1 / 8); r++) {
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// This gives us the row index r
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if (clear)
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firstStripPtr[(r * 96) + col] = 0;
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else
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firstStripPtr[(r * 96) + col] = 0xFF;
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}
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// Finally draw the tail
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mask = ~(mask << (y1 % 8));
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for (uint8_t col = x0; col < x1; col++)
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if (clear)
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firstStripPtr[(y1 / 8) * 96 + col] &= ~mask;
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else
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firstStripPtr[(y1 / 8) * 96 + col] |= mask;
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}
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void OLED::drawHeatSymbol(uint8_t state) {
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// Draw symbol 14
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// Then draw over it, the bottom 5 pixels always stay. 8 pixels above that are
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// the levels masks the symbol nicely
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state /= 31; // 0-> 8 range
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// Then we want to draw down (16-(5+state)
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uint8_t cursor_x_temp = cursor_x;
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drawSymbol(14);
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drawFilledRect(cursor_x_temp, 0, cursor_x_temp + 12, 2 + (8 - state), true);
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}
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