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ssd1306.c
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ssd1306.c
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/**
* original author: Tilen Majerle<tilen@majerle.eu>
* modification for STM32f10x: Alexander Lutsai<s.lyra@ya.ru>
----------------------------------------------------------------------
Copyright (C) Alexander Lutsai, 2016
Copyright (C) Tilen Majerle, 2015
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
----------------------------------------------------------------------
*/
#include "ssd1306.h"
/* Write command */
#define SSD1306_WRITECOMMAND(command) ssd1306_I2C_Write(SSD1306_I2C_ADDR, 0x00, (command))
/* Write data */
#define SSD1306_WRITEDATA(data) ssd1306_I2C_Write(SSD1306_I2C_ADDR, 0x40, (data))
/* Absolute value */
#define ABS(x) ((x) > 0 ? (x) : -(x))
/* SSD1306 data buffer */
static uint8_t SSD1306_Buffer_all[SSD1306_WIDTH * SSD1306_HEIGHT / 8 + 1], *SSD1306_Buffer = SSD1306_Buffer_all + 1;
/* Private SSD1306 structure */
typedef struct {
uint16_t CurrentX;
uint16_t CurrentY;
uint8_t Inverted;
uint8_t Initialized;
} SSD1306_t;
/* Private variable */
static SSD1306_t SSD1306;
uint8_t SSD1306_Init(void) {
/* Init I2C */
ssd1306_I2C_Init();
/* Check if LCD connected to I2C */
if (HAL_I2C_IsDeviceReady(&hi2c1, SSD1306_I2C_ADDR, 1, 20000) != HAL_OK) {
/* Return false */
return 0;
}
/* A little delay */
uint32_t p = 2500;
while(p>0)
p--;
/* Init LCD */
SSD1306_WRITECOMMAND(0xAE); //display off
SSD1306_WRITECOMMAND(0x20); //Set Memory Addressing Mode
SSD1306_WRITECOMMAND(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
SSD1306_WRITECOMMAND(0xB0); //Set Page Start Address for Page Addressing Mode,0-7
SSD1306_WRITECOMMAND(0xC8); //Set COM Output Scan Direction
SSD1306_WRITECOMMAND(0x00); //---set low column address
SSD1306_WRITECOMMAND(0x10); //---set high column address
SSD1306_WRITECOMMAND(0x40); //--set start line address
SSD1306_WRITECOMMAND(0x81); //--set contrast control register
SSD1306_WRITECOMMAND(0xFF);
SSD1306_WRITECOMMAND(0xA1); //--set segment re-map 0 to 127
SSD1306_WRITECOMMAND(0xA6); //--set normal display
SSD1306_WRITECOMMAND(0xA8); //--set multiplex ratio(1 to 64)
SSD1306_WRITECOMMAND(0x3F); //
SSD1306_WRITECOMMAND(0xA4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
SSD1306_WRITECOMMAND(0xD3); //-set display offset
SSD1306_WRITECOMMAND(0x00); //-not offset
SSD1306_WRITECOMMAND(0xD5); //--set display clock divide ratio/oscillator frequency
SSD1306_WRITECOMMAND(0xF0); //--set divide ratio
SSD1306_WRITECOMMAND(0xD9); //--set pre-charge period
SSD1306_WRITECOMMAND(0x22); //
SSD1306_WRITECOMMAND(0xDA); //--set com pins hardware configuration
SSD1306_WRITECOMMAND(0x12);
SSD1306_WRITECOMMAND(0xDB); //--set vcomh
SSD1306_WRITECOMMAND(0x20); //0x20,0.77xVcc
SSD1306_WRITECOMMAND(0x8D); //--set DC-DC enable
SSD1306_WRITECOMMAND(0x14); //
SSD1306_WRITECOMMAND(0xAF); //--turn on SSD1306 panel
/* Clear screen */
SSD1306_Fill(SSD1306_COLOR_BLACK);
/* Update screen */
SSD1306_UpdateScreen();
/* Set default values */
SSD1306.CurrentX = 0;
SSD1306.CurrentY = 0;
/* Initialized OK */
SSD1306.Initialized = 1;
/* Return OK */
return 1;
}
void SSD1306_UpdateScreen(void) {
SSD1306_Buffer_all[0] = 0x40;
HAL_I2C_Master_Transmit_DMA(&hi2c1, SSD1306_I2C_ADDR, SSD1306_Buffer_all, SSD1306_WIDTH * SSD1306_HEIGHT / 8 + 1);
while(HAL_DMA_GetState(hi2c1.hdmatx) != HAL_DMA_STATE_READY)
{
HAL_Delay(1); //Change for your RTOS
}
}
void SSD1306_ToggleInvert(void) {
uint16_t i;
/* Toggle invert */
SSD1306.Inverted = !SSD1306.Inverted;
/* Do memory toggle */
for (i = 0; i < sizeof(SSD1306_Buffer); i++) {
SSD1306_Buffer[i] = ~SSD1306_Buffer[i];
}
}
void SSD1306_Fill(uint8_t color) {
/* Set memory */
memset(SSD1306_Buffer, (color == SSD1306_COLOR_BLACK) ? 0x00 : 0xFF, SSD1306_WIDTH * SSD1306_HEIGHT / 8);
}
void SSD1306_DrawPixel(uint16_t x, uint16_t y, uint8_t color) {
if (
x >= SSD1306_WIDTH ||
y >= SSD1306_HEIGHT
) {
/* Error */
return;
}
/* Check if pixels are inverted */
if (SSD1306.Inverted) {
color = (uint8_t)!color;
}
/* Set color */
if (color == SSD1306_COLOR_WHITE) {
SSD1306_Buffer[x + (y / 8) * SSD1306_WIDTH] |= 1 << (y % 8);
} else {
SSD1306_Buffer[x + (y / 8) * SSD1306_WIDTH] &= ~(1 << (y % 8));
}
}
void SSD1306_GotoXY(uint16_t x, uint16_t y) {
/* Set write pointers */
SSD1306.CurrentX = x;
SSD1306.CurrentY = y;
}
char SSD1306_Putc(char ch, FontDef_t* Font, uint8_t color) {
uint32_t i, b, j;
b = 0;
/* Go through font */
for (i = 0; i < Font->FontHeight; i++) {
for (j = 0; j < Font->FontWidth; j++) {
if ((Font->data[ch*Font->CharBytes + b/8] >> b%8) & 1) {
SSD1306_DrawPixel(SSD1306.CurrentX + j, (SSD1306.CurrentY + i), (uint8_t) color);
} else {
SSD1306_DrawPixel(SSD1306.CurrentX + j, (SSD1306.CurrentY + i), (uint8_t)!color);
}
b++;
}
}
/* Increase pointer */
SSD1306.CurrentX += Font->FontWidth;
/* Return character written */
return ch;
}
char SSD1306_Puts(char* str, FontDef_t* Font, uint8_t color) {
/* Write characters */
while (*str) {
/* Write character by character */
if (SSD1306_Putc(*str, Font, color) != *str) {
/* Return error */
return *str;
}
/* Increase string pointer */
str++;
}
/* Everything OK, zero should be returned */
return *str;
}
void SSD1306_DrawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint8_t c) {
int16_t dx, dy, sx, sy, err, e2, i, tmp;
/* Check for overflow */
if (x0 >= SSD1306_WIDTH) {
x0 = SSD1306_WIDTH - 1;
}
if (x1 >= SSD1306_WIDTH) {
x1 = SSD1306_WIDTH - 1;
}
if (y0 >= SSD1306_HEIGHT) {
y0 = SSD1306_HEIGHT - 1;
}
if (y1 >= SSD1306_HEIGHT) {
y1 = SSD1306_HEIGHT - 1;
}
dx = (x0 < x1) ? (x1 - x0) : (x0 - x1);
dy = (y0 < y1) ? (y1 - y0) : (y0 - y1);
sx = (x0 < x1) ? 1 : -1;
sy = (y0 < y1) ? 1 : -1;
err = ((dx > dy) ? dx : -dy) / 2;
if (dx == 0) {
if (y1 < y0) {
tmp = y1;
y1 = y0;
y0 = tmp;
}
if (x1 < x0) {
tmp = x1;
x1 = x0;
x0 = tmp;
}
/* Vertical line */
for (i = y0; i <= y1; i++) {
SSD1306_DrawPixel(x0, i, c);
}
/* Return from function */
return;
}
if (dy == 0) {
if (y1 < y0) {
tmp = y1;
y1 = y0;
y0 = tmp;
}
if (x1 < x0) {
tmp = x1;
x1 = x0;
x0 = tmp;
}
/* Horizontal line */
for (i = x0; i <= x1; i++) {
SSD1306_DrawPixel(i, y0, c);
}
/* Return from function */
return;
}
while (1) {
SSD1306_DrawPixel(x0, y0, c);
if (x0 == x1 && y0 == y1) {
break;
}
e2 = err;
if (e2 > -dx) {
err -= dy;
x0 += sx;
}
if (e2 < dy) {
err += dx;
y0 += sy;
}
}
}
void SSD1306_DrawRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t c) {
/* Check input parameters */
if (
x >= SSD1306_WIDTH ||
y >= SSD1306_HEIGHT
) {
/* Return error */
return;
}
/* Check width and height */
if ((x + w) >= SSD1306_WIDTH) {
w = SSD1306_WIDTH - x;
}
if ((y + h) >= SSD1306_HEIGHT) {
h = SSD1306_HEIGHT - y;
}
/* Draw 4 lines */
SSD1306_DrawLine(x, y, x + w, y, c); /* Top line */
SSD1306_DrawLine(x, y + h, x + w, y + h, c); /* Bottom line */
SSD1306_DrawLine(x, y, x, y + h, c); /* Left line */
SSD1306_DrawLine(x + w, y, x + w, y + h, c); /* Right line */
}
void SSD1306_DrawFilledRectangle(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t c) {
uint8_t i;
/* Check input parameters */
if (
x >= SSD1306_WIDTH ||
y >= SSD1306_HEIGHT
) {
/* Return error */
return;
}
/* Check width and height */
if ((x + w) >= SSD1306_WIDTH) {
w = SSD1306_WIDTH - x;
}
if ((y + h) >= SSD1306_HEIGHT) {
h = SSD1306_HEIGHT - y;
}
/* Draw lines */
for (i = 0; i <= h; i++) {
/* Draw lines */
SSD1306_DrawLine(x, y + i, x + w, y + i, c);
}
}
void SSD1306_DrawTriangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t x3, uint16_t y3, uint8_t color) {
/* Draw lines */
SSD1306_DrawLine(x1, y1, x2, y2, color);
SSD1306_DrawLine(x2, y2, x3, y3, color);
SSD1306_DrawLine(x3, y3, x1, y1, color);
}
void SSD1306_DrawFilledTriangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t x3, uint16_t y3, uint8_t color) {
int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0,
yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0,
curpixel = 0;
deltax = ABS(x2 - x1);
deltay = ABS(y2 - y1);
x = x1;
y = y1;
if (x2 >= x1) {
xinc1 = 1;
xinc2 = 1;
} else {
xinc1 = -1;
xinc2 = -1;
}
if (y2 >= y1) {
yinc1 = 1;
yinc2 = 1;
} else {
yinc1 = -1;
yinc2 = -1;
}
if (deltax >= deltay){
xinc1 = 0;
yinc2 = 0;
den = deltax;
num = deltax / 2;
numadd = deltay;
numpixels = deltax;
} else {
xinc2 = 0;
yinc1 = 0;
den = deltay;
num = deltay / 2;
numadd = deltax;
numpixels = deltay;
}
for (curpixel = 0; curpixel <= numpixels; curpixel++) {
SSD1306_DrawLine(x, y, x3, y3, color);
num += numadd;
if (num >= den) {
num -= den;
x += xinc1;
y += yinc1;
}
x += xinc2;
y += yinc2;
}
}
void SSD1306_DrawCircle(int16_t x0, int16_t y0, int16_t r, uint8_t c) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
SSD1306_DrawPixel(x0, y0 + r, c);
SSD1306_DrawPixel(x0, y0 - r, c);
SSD1306_DrawPixel(x0 + r, y0, c);
SSD1306_DrawPixel(x0 - r, y0, c);
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
SSD1306_DrawPixel(x0 + x, y0 + y, c);
SSD1306_DrawPixel(x0 - x, y0 + y, c);
SSD1306_DrawPixel(x0 + x, y0 - y, c);
SSD1306_DrawPixel(x0 - x, y0 - y, c);
SSD1306_DrawPixel(x0 + y, y0 + x, c);
SSD1306_DrawPixel(x0 - y, y0 + x, c);
SSD1306_DrawPixel(x0 + y, y0 - x, c);
SSD1306_DrawPixel(x0 - y, y0 - x, c);
}
}
void SSD1306_DrawFilledCircle(int16_t x0, int16_t y0, int16_t r, uint8_t c) {
int16_t f = 1 - r;
int16_t ddF_x = 1;
int16_t ddF_y = -2 * r;
int16_t x = 0;
int16_t y = r;
SSD1306_DrawPixel(x0, y0 + r, c);
SSD1306_DrawPixel(x0, y0 - r, c);
SSD1306_DrawPixel(x0 + r, y0, c);
SSD1306_DrawPixel(x0 - r, y0, c);
SSD1306_DrawLine(x0 - r, y0, x0 + r, y0, c);
while (x < y) {
if (f >= 0) {
y--;
ddF_y += 2;
f += ddF_y;
}
x++;
ddF_x += 2;
f += ddF_x;
SSD1306_DrawLine(x0 - x, y0 + y, x0 + x, y0 + y, c);
SSD1306_DrawLine(x0 + x, y0 - y, x0 - x, y0 - y, c);
SSD1306_DrawLine(x0 + y, y0 + x, x0 - y, y0 + x, c);
SSD1306_DrawLine(x0 + y, y0 - x, x0 - y, y0 - x, c);
}
}
void ssd1306_image(uint8_t *img, uint8_t frame, uint8_t x, uint8_t y)
{
uint32_t i, b, j;
b = 0;
if(frame >= img[2])
return;
uint32_t start = (frame * (img[3] + (img[4] << 8)));
/* Go through font */
for (i = 0; i < img[1]; i++) {
for (j = 0; j < img[0]; j++) {
SSD1306_DrawPixel(x + j, (y + i), (uint8_t) (img[b/8 + 5 + start] >> (b%8)) & 1);
b++;
}
}
}
void SSD1306_ON(void) {
SSD1306_WRITECOMMAND(0x8D);
SSD1306_WRITECOMMAND(0x14);
SSD1306_WRITECOMMAND(0xAF);
}
void SSD1306_OFF(void) {
SSD1306_WRITECOMMAND(0x8D);
SSD1306_WRITECOMMAND(0x10);
SSD1306_WRITECOMMAND(0xAE);
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////
// _____ ___ _____
// |_ _|__ \ / ____|
// | | ) | |
// | | / /| |
// _| |_ / /_| |____
// |_____|____|\_____|
//
/////////////////////////////////////////////////////////////////////////////////////////////////////////
void ssd1306_I2C_Init() {
//MX_I2C1_Init();
uint32_t p = 250000;
while(p>0)
p--;
//HAL_I2C_DeInit(&hi2c1);
//p = 250000;
//while(p>0)
// p--;
//MX_I2C1_Init();
}
void ssd1306_I2C_WriteMulti(uint8_t address, uint8_t reg, uint8_t* data, uint16_t count) {
uint8_t dt[count + 1];
dt[0] = reg;
uint8_t i;
for(i = 1; i <= count; i++)
dt[i] = data[i-1];
HAL_I2C_Master_Transmit(&hi2c1, address, dt, count, 10);
}
void ssd1306_I2C_WriteMulti_DMA(uint8_t address, uint8_t reg, uint8_t* data, uint16_t count) {
HAL_I2C_Master_Transmit(&hi2c1, address, ®, 1, 100);
HAL_I2C_Master_Transmit_DMA(&hi2c1, address, data, count);
}
void ssd1306_I2C_Write(uint8_t address, uint8_t reg, uint8_t data) {
uint8_t dt[2];
dt[0] = reg;
dt[1] = data;
HAL_I2C_Master_Transmit(&hi2c1, address, dt, 2, 10);
}