Thiagogvc

LCD_flex que irá precisar. Só copiar colaremnovo documento do CCS, salvar ( não precisa compilar). Salva na pasta drivers: // These pins are for the Microchip PicDem2-Plus board, // which is what I used to test the driver. Change these // pins to fit your own board. #define LCD_DB4 PIN_B4 #define LCD_DB5 PIN_B5 #define LCD_DB6 PIN_B6 #define LCD_DB7 PIN_B7 #define LCD_E PIN_B0 #define LCD_RS PIN_B1 #define LCD_RW PIN_B2 // If you only want a 6-pin interface to your LCD, then // connect the R/W pin on the LCD to ground, and comment // out the following line. //#define USE_LCD_RW 1 //======================================== #define lcd_type 2 // 0=5x7, 1=5x10, 2=2 lines #define lcd_line_two 0x40 // LCD RAM address for the 2nd line int8 const LCD_INIT_STRING[4] = { 0x20 | (lcd_type << 2), // Func set: 4-bit, 2 lines, 5x8 dots 0xc, // Display on 1, // Clear display 6 // Increment cursor }; //------------------------------------- void lcd_send_nibble(int8 nibble) { // Note: !! converts an integer expression // to a boolean (1 or 0). output_bit(LCD_DB4, !!(nibble & 1)); output_bit(LCD_DB5, !!(nibble & 2)); output_bit(LCD_DB6, !!(nibble & 4)); output_bit(LCD_DB7, !!(nibble & 8)); delay_cycles(1); output_high(LCD_E); delay_us(2); output_low(LCD_E); } //----------------------------------- // This sub-routine is only called by lcd_read_byte(). // It's not a stand-alone routine. For example, the // R/W signal is set high by lcd_read_byte() before // this routine is called. #ifdef USE_LCD_RW int8 lcd_read_nibble(void) { int8 retval; // Create bit variables so that we can easily set // individual bits in the retval variable. #bit retval_0 = retval.0 #bit retval_1 = retval.1 #bit retval_2 = retval.2 #bit retval_3 = retval.3 retval = 0; output_high(LCD_E); delay_cycles(1); retval_0 = input(LCD_DB4); retval_1 = input(LCD_DB5); retval_2 = input(LCD_DB6); retval_3 = input(LCD_DB7); output_low(LCD_E); return(retval); } #endif //--------------------------------------- // Read a byte from the LCD and return it. #ifdef USE_LCD_RW int8 lcd_read_byte(void) { int8 low; int8 high; output_high(LCD_RW); delay_cycles(1); high = lcd_read_nibble(); low = lcd_read_nibble(); return( (high<<4) | low); } #endif //---------------------------------------- // Send a byte to the LCD. void lcd_send_byte(int8 address, int8 n) { output_low(LCD_RS); #ifdef USE_LCD_RW while(bit_test(lcd_read_byte(),7)) ; #else delay_us(60); #endif if(address) output_high(LCD_RS); else output_low(LCD_RS); delay_cycles(1); #ifdef USE_LCD_RW output_low(LCD_RW); delay_cycles(1); #endif output_low(LCD_E); lcd_send_nibble(n >> 4); lcd_send_nibble(n & 0xf); } //---------------------------- void lcd_init(void) { int8 i; output_low(LCD_RS); #ifdef USE_LCD_RW output_low(LCD_RW); #endif output_low(LCD_E); delay_ms(15); for(i=0 ;i < 3; i++) { lcd_send_nibble(0x03); delay_ms(5); } lcd_send_nibble(0x02); for(i=0; i < sizeof(LCD_INIT_STRING); i++) { lcd_send_byte(0, LCD_INIT_STRING[i]); // If the R/W signal is not used, then // the busy bit can't be polled. One of // the init commands takes longer than // the hard-coded delay of 60 us, so in // that case, lets just do a 5 ms delay // after all four of them. #ifndef USE_LCD_RW delay_ms(5); #endif } } //---------------------------- void lcd_gotoxy(int8 x, int8 y) { int8 address; if(y != 1) address = lcd_line_two; else address=0; address += x-1; lcd_send_byte(0, 0x80 | address); } //----------------------------- void lcd_putc(char c) { switch(c) { case '\f': lcd_send_byte(0,1); delay_ms(2); break; case '\n': lcd_gotoxy(1,2); break; case '\b': lcd_send_byte(0,0x10); break; default: lcd_send_byte(1,c); break; } } //------------------------------ #ifdef USE_LCD_RW char lcd_getc(int8 x, int8 y) { char value; lcd_gotoxy(x,y); // Wait until busy flag is low. while(bit_test(lcd_read_byte(),7)); output_high(LCD_RS); value = lcd_read_byte(); output_low(lcd_RS); return(value); } #endif // flex_lcd.c Falou Eu não entend muito bem os cálculos de freq e duty.