Próbuję uruchomić wyświetlacz OLED na sterowniku SSD1306. Po dłuższym czasie poszukiwań jakiejś fajnej biblioteki trafiłem na poradnik Pana Mirka. Stwierdziłem więc, że chętnie się czegoś nauczę i po kolei przejdę przez wszystko razem z poradnikiem i tak po kolei przepisywałem i próbowałem zrozumieć kod. Jednak po próbie uruchomienia i wyświetlenia pixelu okazało się, że coś mi nie działa. Wyświetlacz jest podłączony po magistrali I2C.
Macie może pomysł co tu może być nie tak 
:
[syntax=c]#include <avr/io.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
#include <string.h>
#include <stdlib.h>
#include "SSD1306.h"
uint8_t ssd1306_buf[1024] = {
};
//******************************* SPI
#if USE_SPI_I2C == 1
static void SPIwrite (uint8_t dat){
uint8_t i;
for (i=0x80; i; i>>=1)
{
SCK_LO;
if (dat & i) MOSI_HI;
else MOSI_LO;
SCK_HI;
}
}
void ssd1306_InitSPI(void){
MOSI_DDR |= MOSI;
SCK_DDR |= SCK;
SCK_PORT |= SCK;
#if USE_RST == 1
RST_DDR |= RST;
RST_PORT |= RST;
#endif
DC_DDR |= DC;
#if USE_CS == 1
CS_DDR = |= DC;
CS_PORT |= CS;
#endif
}
#endif
//******************************* I2C
#if USE_SPI_I2C == 0
void i2cSetBitrate(uint16_t bitrateKHz) {
uint8_t bitrate_div;
bitrate_div = ((F_CPU/10001)/bitrateKHz);
if(bitrate_div >= 16)
bitrate_div = (bitrate_div-16)/2;
TWBR = bitrate_div;
}
void TWI_start(void) {
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTA);
while (!(TWCR&(1<<TWINT)));
}
void TWI_stop(void) {
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
while ( (TWCR&(1<<TWSTO)) );
}
void TWI_write(uint8_t bajt) {
TWDR = bajt;
TWCR = (1<<TWINT)|(1<<TWEN);
while ( !(TWCR&(1<<TWINT)));
}
void TWI_write_buf( uint8_t SLA, uint8_t adr, uint16_t len, uint8_t *buf ) {
TWI_start();
TWI_write(SLA);
TWI_write(adr);
while (len--) TWI_write(*buf++);
TWI_stop();
}
#endif
//***** Wyslij komendę **********
void ssd1306_cmd(uint8_t cmd){
#if USE_SPI_I2C == 1
#if USE_CS == 1
CS_HI;
#endif
DC_LO;
SPIwrite(cmd);
#if USE_CS == 1
CS_LO;
#endif
#if USE_CS == 1
CS_HI;
#endif
#else
uint8_t control = 0x00; //bajt kontrolny
TWI_start();
TWI_write (OLED_I2C_ADDRESS);
TWI_write (control);
TWI_write (cmd);
TWI_stop();
#endif
}
//***** Wyslij dane
void ssd1306_data(uint8_t dat){
#if USE_SPI_I2C == 1
#if USE_CS == 1
CS_HI;
#endif
DC_HI;
#if USE_CS == 1
CS_LO;
#endif
SPIwrite(dat);
#if USE_CS == 1
CS_HI;
#endif
#else
uint8_t control = 0x40; //bajt kontrolny
TWI_start();
TWI_write (OLED_I2C_ADDRESS);
TWI_write (control);
TWI_write (dat);
TWI_stop();
#endif
}
//***** Wyslij bufor ram do sterownika ********
void ssd1306_display(void){
ssd1306_cmd( SSD1306_SETLOWCOLUMN | 0x0);
ssd1306_cmd( SSD1306_SETHICOLUMN | 0x0);
ssd1306_cmd( SSD1306_SETSTARTLINE | 0x0);
#if USE_SPI_I2C == 1
#if USE_CS == 1
CS_HI;
#endif
DC_HI;
#if USE_CS == 1
CS_LO;
#endif
for (uint16_t i=0; i<(SSD1306_WIDTH*SSD1306_HEIGHT/8); i++){
SPIwrite( ssd1306_buf[i] );
}
#if USE_CS == 1
CS_HI;
#endif
#endif
#if USE_SPI_I2C == 0
TWI_write_buf(OLED_I2C_ADDRESS, 0x40, 1024, ssd1306_buf);
#endif
}
//***** Funkcja do ustawiania pixela ********
void ssd1306_setPixel(int x, int y, uint8_t color){
if ((x < 0) || (x >= SSD1306_WIDTH) || (y < 0) || (y >= SSD1306_HEIGHT))
return;
if (color) ssd1306_buf[x+ (y/8)*SSD1306_WIDTH] |= (1 << (y%8));// zapal pixel
else ssd1306_buf[x+ (y/8)*SSD1306_WIDTH] &= ~(1 << (y%8));// zgas pixel
}
//***** Inicjalizacja sterownika SSD1306 sterownika ********
void ssd1306_init(uint8_t vcc, uint8_t refresh){
#if USE_SPI_I2C == 1
ssd1306_InitSPI();
#if USE_RST == 1
RST_HI;
_delay_ms(25);
RST_LO;
_delay_ms(25);
RST_HI;
#else
CS_HI;
_delay_ms(25);
CS_LO;
_delay_ms(25);
CS_HI
#endif
#else
i2cSetBitrate( 400 ); // ustawienie predkosci magistrali I2C
DDRC |= (1 << SCL) | (1 << SDA); // ustawienie kierunku magistali
_delay_ms(50);
#endif
ssd1306_cmd( SSD1306_DISPLAYOFF );
ssd1306_cmd( SSD1306_SETDISPLAYLOCKDIV );
ssd1306_cmd( refresh );
ssd1306_cmd( SSD1306_SETDISPLAYOFFSET );
ssd1306_cmd( 0x0 );
ssd1306_cmd( SSD1306_SETSTARTLINE | 0x0 );
ssd1306_cmd( SSD1306_CHARGEPUMP );
if (vcc == SSD1306_EXTERNALVCC) ssd1306_cmd( 0x10 );
else ssd1306_cmd( 0x14 );
ssd1306_cmd( SSD1306_MEMORYMODE );
ssd1306_cmd( 0x00 );
ssd1306_cmd( SSD1306_SEGREMAP | 0x1 );
ssd1306_cmd( SSD1306_COMSCANDEC );
ssd1306_cmd( SSD1306_SETCONTRAST );
if (vcc == SSD1306_EXTERNALVCC) ssd1306_cmd( 0x9F );
else ssd1306_cmd( 0xCF );
ssd1306_cmd( SSD1306_SETPRECHARGE );
// SSD1306 - 128x32
#if defined SSD1306_128_32
ssd1306_cmd( SSD1306_SETMULTIPLEX );
ssd1306_cmd( 0x1F );
ssd1306_cmd( SSD1306_SETCOMPINS );
ssd1306_cmd( 0x02 );
#endif
// SSD1306 - 128x64
#if defined SSD1306_128_64
ssd1306_cmd( SSD1306_SETMULTIPLEX );
ssd1306_cmd( 0x3F );
ssd1306_cmd( SSD1306_SETCOMPINS );
ssd1306_cmd( 0x12 );
#endif
ssd1306_cmd( SSD1306_DISPLAYALLON_RESUME );
ssd1306_cmd( SSD1306_NORMALDISPLAY );
ssd1306_cmd( SSD1306_DISPLAYALLON );
ssd1306_display();
}[/syntax]
[syntax=c]#ifndef SSD1306_H_
#define SSD1306_H_
// definicje stalych preprocesora
// rozdzielczosc OLED
#define SSD1306_128_64
//#define SSD1306_128_32
#define USE_SPI_I2C 0// 1-SPI, 0-I2C
/* konfiguracja TWI/I2C*/
#define OLED_I2C_ADDRESS0x78
#define I2C_DIRDDRC
#define SCLPC0
#define SDAPC1
/* konfiguracja programowego SPI*/
#define USE_CS0
#define USE_RST1
#define SCK (1<<7)// <------- SCL
#define MOSI (1<<6)// <------- SDA
#define RST (1<<5)// <------- RST
#define DC (1<<4)// <------- D/C
#define CS (1<<5)// <------- CS
#define SCK_PORTPORTC
#define SCK_DDRDDRC
#define MOSI_PORTPORTC
#define MOSI_DDRDDRC
#define RST_PORTPORTC
#define RST_DDRDDRC
#define DC_PORTPORTC
#define DC_DDRDDRC
#define CS_PORTPORTC
#define CS_DDRDDRC
#define RST_LORST_PORT &= ~RST
#define RST_HIRST_PORT |= RST
#define CS_LOCS_PORT &= ~CS
#define CS_HICS_PORT |= CS
#define DC_LODC_PORT &= ~DC
#define DC_HIDC_PORT |= DC
#define SCK_LOSCK_PORT &= ~SCK
#define SCK_HISCK_PORT |= SCK
#define MOSI_LOMOSI_PORT &= ~MOSI
#define MOSI_HIMOSI_PORT |= MOSI
#define SSD1306_WIDTH128
#if defined SSD1306_128_64
#define SSD1306_HEIGHT64
#endif
#if defined SSD1306_128_32
#define SSD1306_HEIGHT32
#endif
#define REFERESH_MIN 0x80
#define REFERESH_MID 0xB0
#define REFERESH_MAX 0xF0
#define SSD1306_SETCONTRAST 0X81
#define SSD1306_DISPLAYALLON_RESUME 0xA4
#define SSD1306_DISPLAYALLON 0xA5
#define SSD1306_NORMALDISPLAY 0xA6
#define SSD1306_INVERTDISPLAY 0xA7
#define SSD1306_DISPLAYOFF 0xAE
#define SSD1306_DISPLAYON 0xAF
#define SSD1306_SETDISPLAYOFFSET 0xD3
#define SSD1306_SETCOMPINS 0xDA
#define SSD1306_SETVCOMDETECT 0xDB
#define SSD1306_SETDISPLAYLOCKDIV 0xD5
#define SSD1306_SETPRECHARGE 0xD9
#define SSD1306_SETMULTIPLEX 0xA8
#define SSD1306_SETLOWCOLUMN 0x00
#define SSD1306_SETHICOLUMN 0x10
#define SSD1306_SETSTARTLINE 0x40
#define SSD1306_MEMORYMODE 0x20
#define SSD1306_COMSCANINC 0xC0
#define SSD1306_COMSCANDEC 0xC8
#define SSD1306_SEGREMAP 0xA0
#define SSD1306_CHARGEPUMP 0x8D
#define SSD1306_EXTERNALVCC 0x1
#define SSD1306_SWITCHCAPVCC 0x2
//przewijanie #defines
#define SSD1306_ACTIVE_SCROLL 0x2F
#define SSD1306_DEACTIVE_SCROLL 0x2E
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
// deklaracje zmiennych
// deklaracje funkcji
void ssd1306_init(uint8_t vcc, uint8_t refresh);
void ssd1306_cmd(uint8_t cmd);
void ssd1306_data(uint8_t dat);
void ssd1306_display(void);
void ssd1306_setPixel(int x, int y, uint8_t color);
#endif /* SSD1306_H_ */[/syntax]Statystyki: Napisane przez SK97 — 21 lis 2020, o 16:33
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