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https://github.com/Ralim/IronOS.git
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319 lines
9.1 KiB
C
319 lines
9.1 KiB
C
/*
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*
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* OLED.c
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* Functions for working with the oled screen.
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* Writes to the screen using I2C
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*/
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#include <stdio.h>
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#include <string.h>
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#include "Oled.h"
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#include "Bios.h"
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#include "I2C.h"
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#include "Font.h"
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int8_t displayOffset = 32;
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uint8_t currentOrientation = 0;
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uint8_t displayBuffer[2 * 96]; //This is used to allow us to draw locally before sync'ing to the screen.
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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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u8 OLED_Setup_Array[46] = { /**/
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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,/*Unknown*/
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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 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,/*Unknown*/
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0x80, 0x14,/*Unknown*/
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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,/**/
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0x80, 0xDB,/*Adjust VCOMH regulator ouput*/
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0x80, 0x30,/*Unknown*/
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0x80, 0xA4,/*Enable the display GDDR*/
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0x80, 0XA6,/*Normal display*/
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0x80, 0xAF /*Dispaly on*/
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};
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uint8_t OLEDOnOffState = 0; //Used to lock out so we dont send it too often
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/*
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Function: Oled_DisplayOn
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Description:Turn on the Oled display
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*/
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void Oled_DisplayOn(void) {
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if (OLEDOnOffState != 1) {
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u8 data[6] = { 0x80, 0X8D, 0x80, 0X14, 0x80, 0XAF };
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I2C_PageWrite(data, 6, DEVICEADDR_OLED);
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OLEDOnOffState = 1;
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}
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}
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/*
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Function: Oled_DisplayOff
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Description:Turn off the Oled display
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*/
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void Oled_DisplayOff(void) {
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if (OLEDOnOffState != 2) {
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u8 data[6] = { 0x80, 0X8D, 0x80, 0X10, 0x80, 0XAE };
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I2C_PageWrite(data, 6, DEVICEADDR_OLED);
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OLEDOnOffState = 2;
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}
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}
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/*
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Description: write a command to the Oled display
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Input: number of bytes to write, array to write
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Output:
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*/
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const u8* Data_Command(u8 length, const u8* data) {
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int i;
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u8 tx_data[129];
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//here are are inserting the data write command at the beginning
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tx_data[0] = 0x40;
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length++;
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for (i = 1; i <= length; i++) //Loop through the array of data
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{
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if (data == 0)
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tx_data[i] = 0;
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else
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tx_data[i] = *data++;
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}
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I2C_PageWrite(tx_data, length, DEVICEADDR_OLED); //write out the buffer
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return data;
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}
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//This causes us to write out the buffered screen data to the display
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void OLED_Sync() {
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Set_ShowPos(0, 0);
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Data_Command(96, displayBuffer);
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Set_ShowPos(0, 1);
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Data_Command(96, displayBuffer + 96);
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}
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/*******************************************************************************
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Function:Set_ShowPos
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Description:Set the current position in GRAM that we are drawing to
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Input:x,y co-ordinates
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*******************************************************************************/
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void Set_ShowPos(u8 x, u8 y) {
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u8 pos_param[8] = { 0x80, 0xB0, 0x80, 0x21, 0x80, 0x00, 0x80, 0x7F };
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//page 0, start add = x(below) through to 0x7F (aka 127)
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pos_param[5] = x + displayOffset;/*Display offset ==0 for Lefty, == 32 for righty*/
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pos_param[1] += y;
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I2C_PageWrite(pos_param, 8, DEVICEADDR_OLED);
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}
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/*******************************************************************************
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Function:Oled_DrawArea
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Description:
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Inputs:(x,y) start point, (width,height) of enclosing rect, pointer to data
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Output: pointer to the last byte written out
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*******************************************************************************/
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void Oled_DrawArea(u8 x, u8 y, u8 wide, u8 height, const u8* ptr) {
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//We want to blat the given data over the buffer
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//X is the left right position (index's through the display buffer)
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//Y is the height value (affects the bits)
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//Y is either 0 or 8, we dont do smaller bit blatting
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u8 lines = height / 8;
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//We draw the 1 or two stripes seperately
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for (u8 i = 0; i < (wide * lines); i++) {
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u8 xp = x + (i % wide);
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u8 yoffset = i < wide ? 0 : 96;
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if (y == 8)
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yoffset = 96;
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displayBuffer[xp + yoffset] = ptr[i];
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}
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}
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void OLED_InvertBuffer() {
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for (uint16_t i = 0; i < (2 * 96); i++)
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displayBuffer[i] = ~displayBuffer[i];
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}
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/*******************************************************************************
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Function:GPIO_Init_OLED
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Description:Init the outputs as needed for the OLED (in this case the RST line)
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*******************************************************************************/
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void GPIO_Init_OLED(void) {
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = OLED_RST_PIN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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}
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/*******************************************************************************
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Function: Init_Oled
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Description: Initializes the Oled screen
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*******************************************************************************/
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void Init_Oled(uint8_t leftHanded) {
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currentOrientation = leftHanded;
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u8 param_len;
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OLED_RST();
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delayMs(5);
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OLED_ACT(); //Toggling reset to reset the oled
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delayMs(5);
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param_len = 46;
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if (leftHanded == 1) {
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OLED_Setup_Array[11] = 0xC8;
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OLED_Setup_Array[19] = 0xA1;
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displayOffset = 0;
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} else if (leftHanded == 0) {
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OLED_Setup_Array[11] = 0xC0;
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OLED_Setup_Array[19] = 0x40;
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displayOffset = 32;
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}
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I2C_PageWrite((u8 *) OLED_Setup_Array, param_len, DEVICEADDR_OLED);
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for (uint8_t i = 0; i < 2 * 96; i++)
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displayBuffer[i] = 0; //turn off screen
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}
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/*******************************************************************************
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Function:Clear_Screen
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Description:Clear the entire screen to off (black)
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*******************************************************************************/
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void Clear_Screen(void) {
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memset(displayBuffer, 0, 96 * 2);
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}
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/*
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* Draws a string onto the screen starting at the left
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*/
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void OLED_DrawString(const char* string, const uint8_t length) {
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for (uint8_t i = 0; i < length; i++) {
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if (string[i] >= 0x80) {
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OLED_DrawChar(string[i + 1], i, string[i]);
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i++;
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OLED_DrawChar(' ', i,0);
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} else
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OLED_DrawChar(string[i], i, '\0');
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}
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}
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/*
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* Draw a char onscreen at letter index x
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*/
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void OLED_DrawChar(char c, uint8_t x, char preCursor) {
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if (x > 7)
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return; //clipping
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x *= FONT_WIDTH; //convert to a x coordinate
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u8* ptr;
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u16 offset = 0;
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if (c < 0x80) {
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ptr = (u8*) FONT;
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offset = c - ' ';
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} else if (preCursor>0) {
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ptr = (u8*) FontLatin2;
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offset = c - 0xA0+0x40; //this table starts at 0xA0
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} else
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return; //not in font
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offset *= (2 * FONT_WIDTH);
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ptr += offset;
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Oled_DrawArea(x, 0, FONT_WIDTH, 16, (u8*) ptr);
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}
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void OLED_DrawExtraFontChars(uint8_t id, uint8_t x) {
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u8* ptr = (u8*) ExtraFontChars;
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ptr += (id) * (FONT_WIDTH * 2);
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x *= FONT_WIDTH; //convert to a x coordinate
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Oled_DrawArea(x, 0, FONT_WIDTH, 16, (u8*) ptr);
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}
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void OLED_DrawSymbolChar(uint8_t id, uint8_t x) {
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u8* ptr = (u8*) FontSymbols;
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ptr += (id) * (FONT_WIDTH * 2);
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x *= FONT_WIDTH; //convert to a x coordinate
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Oled_DrawArea(x, 0, FONT_WIDTH, 16, (u8*) ptr);
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}
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void OLED_DrawWideChar(uint8_t id, uint8_t x) {
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u8* ptr = (u8*) DoubleWidthChars;
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ptr += (id) * (FONT_WIDTH * 4);
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x *= FONT_WIDTH; //convert to a x coordinate
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Oled_DrawArea(x, 0, FONT_WIDTH * 2, 16, (u8*) ptr);
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}
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void OLED_BlankSlot(uint8_t xStart, uint8_t width) {
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u8* ptr = (u8*) FONT;
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ptr += (36) * (FONT_WIDTH * 2);
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Oled_DrawArea(xStart, 0, width, 16, (u8*) ptr);
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}
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/*
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* Draw a 2 digit number to the display at letter slot x
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*/
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void OLED_DrawTwoNumber(uint8_t in, uint8_t x) {
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OLED_DrawChar(48 + (in / 10) % 10, x,0);
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OLED_DrawChar(48 + in % 10, x + 1,0);
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}
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/*
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* Draw a 3 digit number to the display at letter slot x
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*/
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void OLED_DrawThreeNumber(uint16_t in, uint8_t x) {
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OLED_DrawChar(48 + (in / 100) % 10, x,0);
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OLED_DrawChar(48 + (in / 10) % 10, x + 1,0);
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OLED_DrawChar(48 + in % 10, x + 2,0);
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}
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/*
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* Draw a 4 digit number to the display at letter slot x
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*/
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void OLED_DrawFourNumber(uint16_t in, uint8_t x) {
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OLED_DrawChar(48 + (in / 1000) % 10, x,0);
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OLED_DrawChar(48 + (in / 100) % 10, x + 1,0);
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OLED_DrawChar(48 + (in / 10) % 10, x + 2,0);
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OLED_DrawChar(48 + (in % 10), x + 3,0);
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}
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void OLED_DrawIDLELogo() {
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static uint8_t drawAttempt = 0;
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drawAttempt++;
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if (drawAttempt & 0x80) {
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if (drawAttempt & 0x08)
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Oled_DrawArea(0, 0, 96, 8, (u8*) Iron_RightArrow_UP);
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else
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Oled_DrawArea(0, 0, 96, 8, (u8*) Iron_RightArrow_DOWN);
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Oled_DrawArea(0, 8, 96, 8, (u8*) Iron_Base);
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} else {
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if (drawAttempt & 0x08)
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Oled_DrawArea(0, 0, 96, 8, (u8*) Iron_LeftArrow_UP);
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else
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Oled_DrawArea(0, 0, 96, 8, (u8*) Iron_LeftArrow_DOWN);
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Oled_DrawArea(0, 8, 96, 8, (u8*) Iron_Base);
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}
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}
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void OLED_DrawSymbol(uint8_t x, uint8_t symbol) {
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Oled_DrawArea(x * FONT_WIDTH, 0, 16, 16, SymbolTable + (symbol * 32));
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}
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void OLED_SetOrientation(uint8_t ori) {
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if (ori > 1)
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return;
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if (ori != currentOrientation) {
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Init_Oled(ori);
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}
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}
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uint8_t OLED_GetOrientation() {
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return currentOrientation;
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}
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