linux-embedded-examples/ssd1306/oled.c

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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "ssd1306.h"
#define GPIO_DC 82 /* SODIMM 32 */
#define GPIO_RES 31 /* SODIMM 67 */
#define SPI_DEVICE 1
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#define CHIP_SELECT 0
char value[10] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
int main(int argc,char **argv)
{
time_t now;
struct tm *timenow;
ssd1306 *oled;
printf("OLED Test Program !!!\n");
oled = malloc(sizeof(ssd1306));
if (!oled)
exit(ENOMEM);
oled->dc = libsoc_gpio_request(GPIO_DC, LS_SHARED);
oled->res = libsoc_gpio_request(GPIO_RES, LS_SHARED);
if (oled->dc == NULL || oled->res == NULL)
goto fail;
libsoc_gpio_set_direction(oled->dc, OUTPUT);
libsoc_gpio_set_direction(oled->res, OUTPUT);
if (libsoc_gpio_get_direction(oled->dc) != OUTPUT ||
libsoc_gpio_get_direction(oled->res) != OUTPUT) {
printf("Failed to set direction to OUTPUT\n");
goto fail;
}
oled->switch_capvcc = 0;
oled->spi_dev = libsoc_spi_init(SPI_DEVICE, CHIP_SELECT);
if (!oled->spi_dev) {
printf("Failed to get spidev device!\n");
return EXIT_FAILURE;
}
libsoc_spi_set_mode(oled->spi_dev, MODE_0);
libsoc_spi_get_mode(oled->spi_dev);
libsoc_spi_set_speed(oled->spi_dev, 2000000);
libsoc_spi_get_speed(oled->spi_dev);
libsoc_spi_set_bits_per_word(oled->spi_dev, BITS_8);
libsoc_spi_get_bits_per_word(oled->spi_dev);
SSD1306_begin(oled);
SSD1306_clear(oled);
while(1) {
time(&now);
timenow = localtime(&now);
SSD1306_bitmap(oled, 0, 2, Singal816, 16, 8);
SSD1306_bitmap(oled, 24, 2, Bluetooth88, 8, 8);
SSD1306_bitmap(oled, 40, 2, Msg816, 16, 8);
SSD1306_bitmap(oled, 64, 2, GPRS88, 8, 8);
SSD1306_bitmap(oled, 90, 2, Alarm88, 8, 8);
SSD1306_bitmap(oled, 112, 2, Bat816, 16, 8);
SSD1306_string(oled, 0, 52, "MUSIC", 12, 0);
SSD1306_string(oled, 52, 52, "MENU", 12, 0);
SSD1306_string(oled, 98, 52, "PHONE", 12, 0);
SSD1306_char3216(oled, 0,16, value[timenow->tm_hour/10]);
SSD1306_char3216(oled, 16,16, value[timenow->tm_hour%10]);
SSD1306_char3216(oled, 32,16, ':');
SSD1306_char3216(oled, 48,16, value[timenow->tm_min/10]);
SSD1306_char3216(oled, 64,16, value[timenow->tm_min%10]);
SSD1306_char3216(oled, 80,16, ':');
SSD1306_char3216(oled, 96,16, value[timenow->tm_sec/10]);
SSD1306_char3216(oled, 112,16, value[timenow->tm_sec%10]);
SSD1306_display(oled);
}
libsoc_spi_free(oled->spi_dev);
libsoc_gpio_free(oled->res);
libsoc_gpio_free(oled->dc);
fail:
if (oled->dc)
libsoc_gpio_free(oled->dc);
if (oled->res)
libsoc_gpio_free(oled->res);
return 0;
}