503 lines
14 KiB
C
503 lines
14 KiB
C
#include "ssd1306.h"
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <string.h> // For memcpy
|
|
#include "sys_app.h"
|
|
|
|
#if defined(SSD1306_USE_I2C)
|
|
|
|
void ssd1306_Reset(void) {
|
|
/* for I2C - do nothing */
|
|
}
|
|
|
|
// Send a byte to the command register
|
|
void ssd1306_WriteCommand(uint8_t byte) {
|
|
HAL_I2C_Mem_Write(&SSD1306_I2C_PORT, SSD1306_I2C_ADDR, 0x00, 1, &byte, 1, HAL_MAX_DELAY);
|
|
}
|
|
|
|
// Send data
|
|
void ssd1306_WriteData(uint8_t* buffer, size_t buff_size) {
|
|
HAL_I2C_Mem_Write(&SSD1306_I2C_PORT, SSD1306_I2C_ADDR, 0x40, 1, buffer, buff_size, HAL_MAX_DELAY);
|
|
}
|
|
|
|
#elif defined(SSD1306_USE_SPI)
|
|
|
|
void ssd1306_Reset(void) {
|
|
// CS = High (not selected)
|
|
HAL_GPIO_WritePin(SSD1306_CS_Port, SSD1306_CS_Pin, GPIO_PIN_SET);
|
|
|
|
// Reset the OLED
|
|
HAL_GPIO_WritePin(SSD1306_Reset_Port, SSD1306_Reset_Pin, GPIO_PIN_RESET);
|
|
HAL_Delay(10);
|
|
HAL_GPIO_WritePin(SSD1306_Reset_Port, SSD1306_Reset_Pin, GPIO_PIN_SET);
|
|
HAL_Delay(10);
|
|
}
|
|
|
|
// Send a byte to the command register
|
|
void ssd1306_WriteCommand(uint8_t byte) {
|
|
HAL_GPIO_WritePin(SSD1306_CS_Port, SSD1306_CS_Pin, GPIO_PIN_RESET); // select OLED
|
|
HAL_GPIO_WritePin(SSD1306_DC_Port, SSD1306_DC_Pin, GPIO_PIN_RESET); // command
|
|
HAL_SPI_Transmit(&SSD1306_SPI_PORT, (uint8_t *) &byte, 1, HAL_MAX_DELAY);
|
|
HAL_GPIO_WritePin(SSD1306_CS_Port, SSD1306_CS_Pin, GPIO_PIN_SET); // un-select OLED
|
|
}
|
|
|
|
// Send data
|
|
void ssd1306_WriteData(uint8_t* buffer, size_t buff_size) {
|
|
HAL_GPIO_WritePin(SSD1306_CS_Port, SSD1306_CS_Pin, GPIO_PIN_RESET); // select OLED
|
|
HAL_GPIO_WritePin(SSD1306_DC_Port, SSD1306_DC_Pin, GPIO_PIN_SET); // data
|
|
HAL_SPI_Transmit(&SSD1306_SPI_PORT, buffer, buff_size, HAL_MAX_DELAY);
|
|
HAL_GPIO_WritePin(SSD1306_CS_Port, SSD1306_CS_Pin, GPIO_PIN_SET); // un-select OLED
|
|
}
|
|
|
|
#else
|
|
#error "You should define SSD1306_USE_SPI or SSD1306_USE_I2C macro"
|
|
#endif
|
|
|
|
|
|
// Screenbuffer
|
|
static uint8_t SSD1306_Buffer[SSD1306_BUFFER_SIZE];
|
|
|
|
// Screen object
|
|
static SSD1306_t SSD1306;
|
|
|
|
/* Fills the Screenbuffer with values from a given buffer of a fixed length */
|
|
SSD1306_Error_t ssd1306_FillBuffer(uint8_t* buf, uint32_t len) {
|
|
SSD1306_Error_t ret = SSD1306_ERR;
|
|
if (len <= SSD1306_BUFFER_SIZE) {
|
|
memcpy(SSD1306_Buffer,buf,len);
|
|
ret = SSD1306_OK;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
// Initialize the oled screen
|
|
void ssd1306_Init(void) {
|
|
// Reset OLED
|
|
ssd1306_Reset();
|
|
// Wait for the screen to boot
|
|
HAL_Delay(100);
|
|
|
|
// Init OLED
|
|
|
|
ssd1306_SetDisplayOn(0); //display off
|
|
|
|
HAL_Delay(100);
|
|
|
|
ssd1306_SetDisplayOn(1); //display on
|
|
|
|
HAL_Delay(100);
|
|
|
|
|
|
ssd1306_WriteCommand(0x20); //Set Memory Addressing Mode
|
|
ssd1306_WriteCommand(0x00); // 00b,Horizontal Addressing Mode; 01b,Vertical Addressing Mode;
|
|
// 10b,Page Addressing Mode (RESET); 11b,Invalid
|
|
|
|
ssd1306_WriteCommand(0xB0); //Set Page Start Address for Page Addressing Mode,0-7
|
|
|
|
#ifdef SSD1306_MIRROR_VERT
|
|
ssd1306_WriteCommand(0xC0); // Mirror vertically
|
|
#else
|
|
ssd1306_WriteCommand(0xC8); //Set COM Output Scan Direction
|
|
#endif
|
|
|
|
ssd1306_WriteCommand(0x00); //---set low column address
|
|
ssd1306_WriteCommand(0x10); //---set high column address
|
|
|
|
ssd1306_WriteCommand(0x40); //--set start line address - CHECK
|
|
|
|
ssd1306_SetContrast(0xFF);
|
|
|
|
#ifdef SSD1306_MIRROR_HORIZ
|
|
ssd1306_WriteCommand(0xA0); // Mirror horizontally
|
|
#else
|
|
ssd1306_WriteCommand(0xA1); //--set segment re-map 0 to 127 - CHECK
|
|
#endif
|
|
|
|
#ifdef SSD1306_INVERSE_COLOR
|
|
ssd1306_WriteCommand(0xA7); //--set inverse color
|
|
#else
|
|
ssd1306_WriteCommand(0xA6); //--set normal color
|
|
#endif
|
|
|
|
// Set multiplex ratio.
|
|
#if (SSD1306_HEIGHT == 128)
|
|
// Found in the Luma Python lib for SH1106.
|
|
ssd1306_WriteCommand(0xFF);
|
|
#else
|
|
ssd1306_WriteCommand(0xA8); //--set multiplex ratio(1 to 64) - CHECK
|
|
#endif
|
|
|
|
#if (SSD1306_HEIGHT == 32)
|
|
ssd1306_WriteCommand(0x1F); //
|
|
#elif (SSD1306_HEIGHT == 64)
|
|
ssd1306_WriteCommand(0x3F); //
|
|
#elif (SSD1306_HEIGHT == 96)
|
|
ssd1306_WriteCommand(0x3F); //
|
|
#elif (SSD1306_HEIGHT == 128)
|
|
ssd1306_WriteCommand(0x3F); // Seems to work for 128px high displays too.
|
|
#else
|
|
#error "Only 32, 64, or 128 lines of height are supported!"
|
|
#endif
|
|
|
|
ssd1306_WriteCommand(0xA4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
|
|
|
|
ssd1306_WriteCommand(0xD3); //-set display offset - CHECK
|
|
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 - CHECK
|
|
#if (SSD1306_HEIGHT == 32)
|
|
ssd1306_WriteCommand(0x02);
|
|
#elif (SSD1306_HEIGHT == 64)
|
|
ssd1306_WriteCommand(0x12);
|
|
#elif (SSD1306_HEIGHT == 96)
|
|
ssd1306_WriteCommand(0x12);
|
|
#elif (SSD1306_HEIGHT == 128)
|
|
ssd1306_WriteCommand(0x12);
|
|
#else
|
|
#error "Only 32, 64, or 128 lines of height are supported!"
|
|
#endif
|
|
|
|
ssd1306_WriteCommand(0xDB); //--set vcomh
|
|
ssd1306_WriteCommand(0x20); //0x20,0.77xVcc
|
|
|
|
ssd1306_WriteCommand(0x8D); //--set DC-DC enable
|
|
ssd1306_WriteCommand(0x14); //
|
|
|
|
// APP_LOG(TS_ON, VLEVEL_L, "\r\nSSD 1306 -- Set Display On \r\n");
|
|
|
|
//ssd1306_SetDisplayOn(1); //--turn on SSD1306 panel
|
|
|
|
// Clear screen
|
|
ssd1306_Fill(Black);
|
|
//ssd1306_Fill(White);
|
|
|
|
// Flush buffer to screen
|
|
ssd1306_UpdateScreen();
|
|
|
|
// Set default values for screen object
|
|
SSD1306.CurrentX = 0;
|
|
SSD1306.CurrentY = 0;
|
|
|
|
SSD1306.Initialized = 1;
|
|
}
|
|
|
|
// Fill the whole screen with the given color
|
|
void ssd1306_Fill(SSD1306_COLOR color) {
|
|
/* Set memory */
|
|
uint32_t i;
|
|
|
|
for(i = 0; i < sizeof(SSD1306_Buffer); i++) {
|
|
SSD1306_Buffer[i] = (color == Black) ? 0x00 : 0xFF;
|
|
}
|
|
}
|
|
|
|
// Write the screenbuffer with changed to the screen
|
|
void ssd1306_UpdateScreen(void) {
|
|
// Write data to each page of RAM. Number of pages
|
|
// depends on the screen height:
|
|
//
|
|
// * 32px == 4 pages
|
|
// * 64px == 8 pages
|
|
// * 128px == 16 pages
|
|
for(uint8_t i = 0; i < SSD1306_HEIGHT/8; i++) {
|
|
ssd1306_WriteCommand(0xB0 + i); // Set the current RAM page address.
|
|
ssd1306_WriteCommand(0x00);
|
|
ssd1306_WriteCommand(0x10);
|
|
ssd1306_WriteData(&SSD1306_Buffer[SSD1306_WIDTH*i],SSD1306_WIDTH);
|
|
}
|
|
}
|
|
|
|
// Draw one pixel in the screenbuffer
|
|
// X => X Coordinate
|
|
// Y => Y Coordinate
|
|
// color => Pixel color
|
|
void ssd1306_DrawPixel(uint8_t x, uint8_t y, SSD1306_COLOR color) {
|
|
if(x >= SSD1306_WIDTH || y >= SSD1306_HEIGHT) {
|
|
// Don't write outside the buffer
|
|
return;
|
|
}
|
|
|
|
// Draw in the right color
|
|
if(color == White) {
|
|
SSD1306_Buffer[x + (y / 8) * SSD1306_WIDTH] |= 1 << (y % 8);
|
|
} else {
|
|
SSD1306_Buffer[x + (y / 8) * SSD1306_WIDTH] &= ~(1 << (y % 8));
|
|
}
|
|
}
|
|
|
|
// Draw 1 char to the screen buffer
|
|
// ch => char om weg te schrijven
|
|
// Font => Font waarmee we gaan schrijven
|
|
// color => Black or White
|
|
char ssd1306_WriteChar(char ch, FontDef Font, SSD1306_COLOR color) {
|
|
uint32_t i, b, j;
|
|
|
|
// Check if character is valid
|
|
if (ch < 32 || ch > 126)
|
|
return 0;
|
|
|
|
// Check remaining space on current line
|
|
if (SSD1306_WIDTH < (SSD1306.CurrentX + Font.FontWidth) ||
|
|
SSD1306_HEIGHT < (SSD1306.CurrentY + Font.FontHeight))
|
|
{
|
|
// Not enough space on current line
|
|
return 0;
|
|
}
|
|
|
|
// Use the font to write
|
|
for(i = 0; i < Font.FontHeight; i++) {
|
|
b = Font.data[(ch - 32) * Font.FontHeight + i];
|
|
for(j = 0; j < Font.FontWidth; j++) {
|
|
if((b << j) & 0x8000) {
|
|
ssd1306_DrawPixel(SSD1306.CurrentX + j, (SSD1306.CurrentY + i), (SSD1306_COLOR) color);
|
|
} else {
|
|
ssd1306_DrawPixel(SSD1306.CurrentX + j, (SSD1306.CurrentY + i), (SSD1306_COLOR)!color);
|
|
}
|
|
}
|
|
}
|
|
|
|
// The current space is now taken
|
|
SSD1306.CurrentX += Font.FontWidth;
|
|
|
|
// Return written char for validation
|
|
return ch;
|
|
}
|
|
|
|
// Write full string to screenbuffer
|
|
char ssd1306_WriteString(char* str, FontDef Font, SSD1306_COLOR color) {
|
|
// Write until null-byte
|
|
while (*str) {
|
|
if (ssd1306_WriteChar(*str, Font, color) != *str) {
|
|
// Char could not be written
|
|
return *str;
|
|
}
|
|
|
|
// Next char
|
|
str++;
|
|
}
|
|
|
|
// Everything ok
|
|
return *str;
|
|
}
|
|
|
|
// Position the cursor
|
|
void ssd1306_SetCursor(uint8_t x, uint8_t y) {
|
|
SSD1306.CurrentX = x;
|
|
SSD1306.CurrentY = y;
|
|
}
|
|
|
|
// Draw line by Bresenhem's algorithm
|
|
void ssd1306_Line(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, SSD1306_COLOR color) {
|
|
int32_t deltaX = abs(x2 - x1);
|
|
int32_t deltaY = abs(y2 - y1);
|
|
int32_t signX = ((x1 < x2) ? 1 : -1);
|
|
int32_t signY = ((y1 < y2) ? 1 : -1);
|
|
int32_t error = deltaX - deltaY;
|
|
int32_t error2;
|
|
|
|
ssd1306_DrawPixel(x2, y2, color);
|
|
while((x1 != x2) || (y1 != y2))
|
|
{
|
|
ssd1306_DrawPixel(x1, y1, color);
|
|
error2 = error * 2;
|
|
if(error2 > -deltaY)
|
|
{
|
|
error -= deltaY;
|
|
x1 += signX;
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
|
|
if(error2 < deltaX)
|
|
{
|
|
error += deltaX;
|
|
y1 += signY;
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
//Draw polyline
|
|
void ssd1306_Polyline(const SSD1306_VERTEX *par_vertex, uint16_t par_size, SSD1306_COLOR color) {
|
|
uint16_t i;
|
|
if(par_vertex != 0){
|
|
for(i = 1; i < par_size; i++){
|
|
ssd1306_Line(par_vertex[i - 1].x, par_vertex[i - 1].y, par_vertex[i].x, par_vertex[i].y, color);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
return;
|
|
}
|
|
/*Convert Degrees to Radians*/
|
|
static float ssd1306_DegToRad(float par_deg) {
|
|
return par_deg * 3.14 / 180.0;
|
|
}
|
|
/*Normalize degree to [0;360]*/
|
|
static uint16_t ssd1306_NormalizeTo0_360(uint16_t par_deg) {
|
|
uint16_t loc_angle;
|
|
if(par_deg <= 360)
|
|
{
|
|
loc_angle = par_deg;
|
|
}
|
|
else
|
|
{
|
|
loc_angle = par_deg % 360;
|
|
loc_angle = ((par_deg != 0)?par_deg:360);
|
|
}
|
|
return loc_angle;
|
|
}
|
|
/*DrawArc. Draw angle is beginning from 4 quart of trigonometric circle (3pi/2)
|
|
* start_angle in degree
|
|
* sweep in degree
|
|
*/
|
|
void ssd1306_DrawArc(uint8_t x, uint8_t y, uint8_t radius, uint16_t start_angle, uint16_t sweep, SSD1306_COLOR color) {
|
|
#define CIRCLE_APPROXIMATION_SEGMENTS 36
|
|
float approx_degree;
|
|
uint32_t approx_segments;
|
|
uint8_t xp1,xp2;
|
|
uint8_t yp1,yp2;
|
|
uint32_t count = 0;
|
|
uint32_t loc_sweep = 0;
|
|
float rad;
|
|
|
|
loc_sweep = ssd1306_NormalizeTo0_360(sweep);
|
|
|
|
count = (ssd1306_NormalizeTo0_360(start_angle) * CIRCLE_APPROXIMATION_SEGMENTS) / 360;
|
|
approx_segments = (loc_sweep * CIRCLE_APPROXIMATION_SEGMENTS) / 360;
|
|
approx_degree = loc_sweep / (float)approx_segments;
|
|
while(count < approx_segments)
|
|
{
|
|
rad = ssd1306_DegToRad(count*approx_degree);
|
|
xp1 = x + (int8_t)(sin(rad)*radius);
|
|
yp1 = y + (int8_t)(cos(rad)*radius);
|
|
count++;
|
|
if(count != approx_segments)
|
|
{
|
|
rad = ssd1306_DegToRad(count*approx_degree);
|
|
}
|
|
else
|
|
{
|
|
rad = ssd1306_DegToRad(loc_sweep);
|
|
}
|
|
xp2 = x + (int8_t)(sin(rad)*radius);
|
|
yp2 = y + (int8_t)(cos(rad)*radius);
|
|
ssd1306_Line(xp1,yp1,xp2,yp2,color);
|
|
}
|
|
|
|
return;
|
|
}
|
|
//Draw circle by Bresenhem's algorithm
|
|
void ssd1306_DrawCircle(uint8_t par_x,uint8_t par_y,uint8_t par_r,SSD1306_COLOR par_color) {
|
|
int32_t x = -par_r;
|
|
int32_t y = 0;
|
|
int32_t err = 2 - 2 * par_r;
|
|
int32_t e2;
|
|
|
|
if (par_x >= SSD1306_WIDTH || par_y >= SSD1306_HEIGHT) {
|
|
return;
|
|
}
|
|
|
|
do {
|
|
ssd1306_DrawPixel(par_x - x, par_y + y, par_color);
|
|
ssd1306_DrawPixel(par_x + x, par_y + y, par_color);
|
|
ssd1306_DrawPixel(par_x + x, par_y - y, par_color);
|
|
ssd1306_DrawPixel(par_x - x, par_y - y, par_color);
|
|
e2 = err;
|
|
if (e2 <= y) {
|
|
y++;
|
|
err = err + (y * 2 + 1);
|
|
if(-x == y && e2 <= x) {
|
|
e2 = 0;
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
if(e2 > x) {
|
|
x++;
|
|
err = err + (x * 2 + 1);
|
|
}
|
|
else
|
|
{
|
|
/*nothing to do*/
|
|
}
|
|
} while(x <= 0);
|
|
|
|
return;
|
|
}
|
|
|
|
//Draw rectangle
|
|
void ssd1306_DrawRectangle(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, SSD1306_COLOR color) {
|
|
ssd1306_Line(x1,y1,x2,y1,color);
|
|
ssd1306_Line(x2,y1,x2,y2,color);
|
|
ssd1306_Line(x2,y2,x1,y2,color);
|
|
ssd1306_Line(x1,y2,x1,y1,color);
|
|
|
|
return;
|
|
}
|
|
|
|
//Draw bitmap - ported from the ADAFruit GFX library
|
|
|
|
void ssd1306_DrawBitmap(uint8_t x, uint8_t y, const unsigned char* bitmap, uint8_t w, uint8_t h, SSD1306_COLOR color)
|
|
{
|
|
int16_t byteWidth = (w + 7) / 8; // Bitmap scanline pad = whole byte
|
|
uint8_t byte = 0;
|
|
|
|
if (x >= SSD1306_WIDTH || y >= SSD1306_HEIGHT) {
|
|
return;
|
|
}
|
|
|
|
for (uint8_t j = 0; j < h; j++, y++) {
|
|
for (uint8_t i = 0; i < w; i++) {
|
|
if (i & 7)
|
|
byte <<= 1;
|
|
else
|
|
byte = (*(const unsigned char *)(&bitmap[j * byteWidth + i / 8]));
|
|
if (byte & 0x80)
|
|
ssd1306_DrawPixel(x + i, y, color);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
void ssd1306_SetContrast(const uint8_t value) {
|
|
const uint8_t kSetContrastControlRegister = 0x81;
|
|
ssd1306_WriteCommand(kSetContrastControlRegister);
|
|
ssd1306_WriteCommand(value);
|
|
}
|
|
|
|
void ssd1306_SetDisplayOn(const uint8_t on) {
|
|
uint8_t value;
|
|
if (on) {
|
|
value = 0xAF; // Display on
|
|
SSD1306.DisplayOn = 1;
|
|
} else {
|
|
value = 0xAE; // Display off
|
|
SSD1306.DisplayOn = 0;
|
|
}
|
|
ssd1306_WriteCommand(value);
|
|
}
|
|
|
|
uint8_t ssd1306_GetDisplayOn() {
|
|
return SSD1306.DisplayOn;
|
|
}
|