//------------------------------------------------------------------------------------------------ // // ODROID-C printing time Application. // // Defined port number is wiringPi port number. // // Compile : gcc -o -lwiringPi -lwiringPiDev -lpthread // Run : sudo ./ // //------------------------------------------------------------------------------------------------- #include #include #include #include #include #include #include #include #include #include #include #define LCD_ROW 2 // 16 Char #define LCD_COL 16 // 2 Line #define LCD_BUS 4 // Interface 4 Bit mode #define LCD_UPDATE_PERIOD 1000 // 300ms static unsigned char lcdFb[LCD_ROW][LCD_COL] = {0, }; static int lcdHandle = 0; #define PORT_LCD_RS 7 // GPIOY.BIT3(#83) #define PORT_LCD_E 0 // GPIOY.BIT8(#88) #define PORT_LCD_D4 2 // GPIOX.BIT19(#116) #define PORT_LCD_D5 3 // GPIOX.BIT18(#115) #define PORT_LCD_D6 1 // GPIOY.BIT7(#87) #define PORT_LCD_D7 4 // GPIOX.BIT7(#104) static int ledPos = 0; static void lcd_update (void) { int i, j; time_t t; time(&t); memset((void *)&lcdFb, ' ', sizeof(lcdFb)); sprintf(lcdFb[0], "Time %s", ctime(&t)); lcdFb[0][strlen(lcdFb[0])-1] = ' '; lcdFb[0][strlen(lcdFb[0])] = ' '; for(i = 0; i < LCD_ROW; i++) { lcdPosition (lcdHandle, 0, i); for(j = 0; j < LCD_COL; j++) lcdPutchar(lcdHandle, lcdFb[i][j]); } } int system_init(void) { int i, j; // LCD Init lcdHandle = lcdInit(LCD_ROW, LCD_COL, LCD_BUS, PORT_LCD_RS, PORT_LCD_E, PORT_LCD_D4, PORT_LCD_D5, PORT_LCD_D6, PORT_LCD_D7, 0, 0, 0, 0); if(lcdHandle < 0) { fprintf(stderr, "%s : lcdInit failed!\n", __func__); return -1; } return 0; } int main (int argc, char *argv[]) { int timer = 0; wiringPiSetup(); if (system_init() < 0) { fprintf (stderr, "%s: System Init failed\n", __func__); return -1; } for(;;) { usleep(100000); if (millis () < timer) continue; timer = millis () + LCD_UPDATE_PERIOD; // lcd update lcd_update(); } return 0 ; }