b6b207568c
The flickering on the LCD screen was caused by the OLED DMA taking slightly longer than the delays, so the tail end would flicker if the buffer was cleared before it finished writing. In future may want to double buffer the LCD. Fixes #290
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/*
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* OLED.hpp
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*
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* Created on: 20Jan.,2017
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* Author: Ben V. Brown <Ralim>
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* Designed for the SSD1307
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* Cleared for release for TS100 2017/08/20
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*/
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#ifndef OLED_HPP_
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#define OLED_HPP_
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#include <hardware.h>
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#include "stm32f1xx_hal.h"
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#include <stdbool.h>
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#include <string.h>
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#include "FRToSI2C.hpp"
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#include "Font.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "FreeRTOS.h"
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#ifdef __cplusplus
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}
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#endif
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#define DEVICEADDR_OLED (0x3c<<1)
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#define OLED_WIDTH 96
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#define FRAMEBUFFER_START 17
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class OLED {
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public:
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OLED(FRToSI2C* i2cHandle); // Initialize Driver and store I2C pointer
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void initialize(); // Startup the I2C coms (brings screen out of reset etc)
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// Draw the buffer out to the LCD using the DMA Channel
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void refresh() {
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i2c->Transmit( DEVICEADDR_OLED, screenBuffer, FRAMEBUFFER_START + (OLED_WIDTH * 2));
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//DMA tx time is ~ 20mS Ensure after calling this you delay for at least 25ms
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//or we need to goto double buffering
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}
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void drawChar(char c, char preCursorCommand = '\0'); // Draw a character to a specific location
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// Turn the screen on or not
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void displayOnOff(bool on) {
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displayOnOffState = on;
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screenBuffer[1] = on ? 0xAF : 0xAE;
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}
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void setRotation(bool leftHanded); // Set the rotation for the screen
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// Get the current rotation of the LCD
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bool getRotation() const {
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return inLeftHandedMode;
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}
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void print(const char* string); // Draw a string to the current location, with current font
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// Set the cursor location by pixels
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void setCursor(int16_t x, int16_t y) {
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cursor_x = x;
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cursor_y = y;
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}
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//Set cursor location by chars in current font
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void setCharCursor(int16_t x, int16_t y) {
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cursor_x = x * fontWidth;
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cursor_y = y * fontHeight;
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}
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void setFont(uint8_t fontNumber); // (Future) Set the font that is being used
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void drawImage(const uint8_t* buffer, uint8_t x, uint8_t width) {
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drawArea(x, 0, width, 16, buffer);
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}
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// Draws an image to the buffer, at x offset from top to bottom (fixed height renders)
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void printNumber(uint16_t number, uint8_t places);
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// Draws a number at the current cursor location
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// Clears the buffer
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void clearScreen() {
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memset(&screenBuffer[FRAMEBUFFER_START], 0, OLED_WIDTH * 2);
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}
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// Draws the battery level symbol
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void drawBattery(uint8_t state) {
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drawSymbol(3 + (state > 10 ? 10 : state));
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}
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// Draws a checkbox
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void drawCheckbox(bool state) {
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drawSymbol((state) ? 16 : 17);
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}
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void drawSymbol(uint8_t symbolID);//Used for drawing symbols of a predictable width
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void drawArea(int16_t x, int8_t y, uint8_t wide, uint8_t height, const uint8_t* ptr); //Draw an area, but y must be aligned on 0/8 offset
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void fillArea(int16_t x, int8_t y, uint8_t wide, uint8_t height, const uint8_t value); //Fill an area, but y must be aligned on 0/8 offset
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void drawFilledRect(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1,bool clear);
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void drawHeatSymbol(uint8_t state);
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private:
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//Draw a buffer to the screen buffer
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FRToSI2C* i2c; //i2c Pointer
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const uint8_t* currentFont; // Pointer to the current font used for rendering to the buffer
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uint8_t* firstStripPtr; // Pointers to the strips to allow for buffer having extra content
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uint8_t* secondStripPtr; //Pointers to the strips
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bool inLeftHandedMode; // Whether the screen is in left or not (used for offsets in GRAM)
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bool displayOnOffState; // If the display is on or not
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uint8_t fontWidth, fontHeight;
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int16_t cursor_x, cursor_y;
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uint8_t displayOffset;
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uint8_t screenBuffer[16 + (OLED_WIDTH * 2) + 10]; // The data buffer
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};
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#endif /* OLED_HPP_ */
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