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PROYECTOS : AUX Display LCD |
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Circuito auxiliar de Display LCD con un
CM16022A para la RRBOARD2 |
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| Descripción: |
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Para hacerla compatible con nuestra
RRBOARD2 solo he realizado lo
siguiente: |
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| Recursos: |
| Circuito: |
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| Fotografías: |
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| Software: |
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lcd_232_2.c |
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#include <18f4550.h> #fuses HS,MCLR,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOPBADEN,NOLVP,NOCPD,NODEBUG,NOWRT,NOVREGEN #use delay(clock=20000000) #use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7) // Control del LCD con flex_lcd_2 ----------------------------------- // // flex_lcd_2 funciona en modo 4 bits con DB4 a DB7 (DB0 a DB3 a GND) // definir a continuación qué pines del PIC corresponden a DB4 a DB7 #define LCD_DB4 PIN_D7 #define LCD_DB5 PIN_D6 #define LCD_DB6 PIN_D5 #define LCD_DB7 PIN_D4 // si solo va a utilizar escritura en el LCD conecta R/W a GND y // comente la siguiente línea #define USE_LCD_RW 1 // definir a continuación qué pines del PIC manejan las señales de control #define LCD_RS PIN_D1 #define LCD_RW PIN_D2 #define LCD_E PIN_D3 // funciones definidas en flex_lcd_2 disponibles para el usuario // // lcd_init() imprescindible ejecutarla antes de usar el LCD // lcd_setcursor(V,P) Cursor visible si V=1, invisible si V=0, Cursor parpadeando si P=1, fijo si P=0 // lcd_gotoxy(x,y) posiciona el cuarsor en el caracter x (1..16) de la línea y (1..2) // lcd_putc(c) muestra el caracter c en la posicion actual del cursor y avanza éste 1 posicion // Caracteres especiales: // \f -> limpia la pantalla y posiciona el cursor en caracter 1 de la linea 1 // \n -> posiciona el cursor en caracter 1 de la linea 2 // \b -> restrocede el cursor una posicion // \t -> avanza el cursor una posicion // lcd_put_string(*ps) muestra el texto ps, caracter a caracter incluidos los especiales, a partir de // de la posicion actual del cursor. Ha de ser una variables no una constante. // lcd_put_string_xy(*ps,x,y) combina lcd_gotoxy y lcd_put_string en una sola función // Include de la librería flex_lcd_2 #include "flex_lcd_2.c" //------------------------------------------------------------------- char Keypress=0x00; char Text1[]="\fTEST LCD\nEN RRBOARD2"; char Text2[]="ABC"; #int_rda void serial_isr() { Keypress=0x00; if(kbhit()){ Keypress=getc(); putc(Keypress); } } void main() { printf("\r\n\LCD on RRBOARD2\r\n\n"); lcd_init(); lcd_setcursor(0,0); lcd_put_string(Text1); lcd_gotoxy(1,2); enable_interrupts(int_rda); enable_interrupts(global); do { if(Keypress!=0x00){ if(Keypress==0x0d){ lcd_put_string_xy(Text2,10,1); } else{ lcd_putc(Keypress); } Keypress=0x00; } } while (TRUE); } |
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Descargar lcd_232_2.c |
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flex_lcd_2 |
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| // flex_lcd_2.c //#define LCD_DB4 PIN_B4 //#define LCD_DB5 PIN_B5 //#define LCD_DB6 PIN_B6 //#define LCD_DB7 PIN_B7 // //#define LCD_RS PIN_C0 //#define LCD_RW PIN_C1 //#define LCD_E PIN_C2 // 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 } delay_ms(15); } //---------------------------- // Posiciones válidas: // de x=1 a x=16 y // de y=1 a y=2 void lcd_gotoxy(int8 x, int8 y){ int8 address; if(x > 0 && y > 0){ if(y > 1) address = lcd_line_two; else address=0; address += x-1; lcd_send_byte(0, 0x80 | address); // Manda cursor a la posición } } //----------------------------- void lcd_putc(char c) { /*' LCD ' Command Operation ' *********** ***************************************** ' $FE, 1 Clear display ' $FE, 2 Return home ' $FE, $0C Cursor off ' $FE, $0E Underline cursor on ' $FE, $0F Blinking cursor on ' $FE, $10 Move cursor left one position ' $FE, $14 Move cursor right one position ' $FE, $80 Move cursor to beginning of first line ' $FE, $C0 Move cursor to beginning of second line ' *********** ***************************************** */ if(c>'\0'){ switch(c){ case '\f': lcd_send_byte(0,1); lcd_send_byte(0,2); delay_ms(2); break; case '\n': lcd_gotoxy(1,2); delay_ms(2); break; case '\b': lcd_send_byte(0,0x10); delay_ms(2); break; case '\t': lcd_send_byte(0,0x14); delay_ms(2); break; default: lcd_send_byte(1,c); delay_ms(2); break; } } } //------------------------------ void lcd_put_string(char *string){ //put string, starting from the curren cursor position //assume that string not excides from lcd displayed RAM char index=0; while(string[index]!=0){ lcd_putc(string[index++]); } } //------------------------------ void lcd_put_string_xy(char *string, char x, char y){ //assume that string not excides from lcd displayed RAM lcd_gotoxy(x,y); lcd_put_string(string); } //------------------------------ #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 //------------------------------ void lcd_setcursor(short visible, short blink) { lcd_send_byte(0, 0xC|(visible<<1)|blink); } |
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Descargar flex_lcd_2.c |
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Esta página se modificó el 27/12/2008
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