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crushneck
Joined: 27 Nov 2005
Posts: 29
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| no display on LCD.. |
 Posted: Wed Feb 01, 2006 9:34 pm |
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I decided to upgrade my PIC16f877 to PIC18F452 but then my circuit did not work...what need to be done to my code for it to work?? its working fine with my old PIc but after i upgrade, it did not display anything on my LCD...all my device power up properly...i hope u can help and heres my code..
| Code: | #include <18F452.H>
#device adc=10
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)
#include <lCD420.c>
//===============================
void main()
{
int16 result;
lcd_init();
setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
while(1)
{
result = read_adc();
lcd_gotoxy(1,1);
printf(lcd_putc, "%04LX", result);
delay_ms(100);
}
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Feb 01, 2006 10:37 pm |
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Those two PICs are in different series and the Port addresses are
not the same for each series. See this thread. It will show you
what to modify in the LCD420.C file.
http://www.ccsinfo.com/forum/viewtopic.php?t=24499 |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Thu Feb 02, 2006 12:16 am |
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my lcd still not working...ive done few changes to my lCD420.c...heres the code...hope u can help..
| Code: |
#define use_portd_lcd TRUE
struct lcd_pin_map {
BOOLEAN rs; // Pin D0
BOOLEAN enable; // Pin D1
BOOLEAN rw; // Pin D2
BOOLEAN unused;
int data : 4; // Pins D4-D7
} lcd;
#if defined(__PCH__) // if PIC18 family compiler
#if defined use_portd_lcd // if LCD is connect to PORTB
#byte lcd = 8 // this is the address used by the struct in the driver
#else // else
#byte lcd = 0xF83 // this one is the address
#endif
#else // else, if PIC16 family compiler
#if defined use_portb_lcd // if LCD is connect to PORTB
#byte lcd = 6 // LCD is on to port B (at address 6)
#else
#byte lcd = 8 // else it is on to port D (at address 8)
#endif
#endif
#define lcd_type 2 // 0=5x7, 1=5x10, 2=2 lines
BYTE const LCD_INIT_STRING[4] = {0x20 | (lcd_type << 2), 0xc, 1, 6};
// These bytes need to be sent to the LCD
// to start it up.
// The following are used for setting
// the I/O port direction register.
struct lcd_pin_map const LCD_WRITE = {0,0,0,0,0}; // For write mode all pins are out
struct lcd_pin_map const LCD_READ = {0,0,0,0,15}; // For read mode data pins are in
BYTE lcdline;
BYTE lcd_read_byte() {
BYTE low,high;
set_tris_d(LCD_READ);
lcd.rw = 1;
delay_cycles(1);
lcd.enable = 1;
delay_cycles(1);
high = lcd.data;
lcd.enable = 0;
delay_cycles(1);
lcd.enable = 1;
delay_us(1);
low = lcd.data;
lcd.enable = 0;
set_tris_d(LCD_WRITE);
return( (high<<4) | low);
}
void lcd_send_nibble( BYTE n ) {
lcd.data = n;
delay_cycles(1);
lcd.enable = 1;
delay_us(2);
lcd.enable = 0;
}
void lcd_send_byte( BYTE address, BYTE n ) {
lcd.rs = 0;
while ( bit_test(lcd_read_byte(),7) ) ;
lcd.rs = address;
delay_cycles(1);
lcd.rw = 0;
delay_cycles(1);
lcd.enable = 0;
lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}
void lcd_init() {
BYTE i;
set_tris_d(LCD_WRITE);
lcd.rs = 0;
lcd.rw = 0;
lcd.enable = 0;
delay_ms(15);
for(i=1;i<=3;++i) {
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=3;++i)
lcd_send_byte(0, LCD_INIT_STRING[i]);
}
void lcd_gotoxy( BYTE x, BYTE y) {
BYTE address;
switch(y) {
case 1 : address=0x80;break;
case 2 : address=0xc0;break;//0xc0
case 3 : address=0x94;break;//0x94
case 4 : address=0xd4;break;
}
address+=x-1;
lcd_send_byte(0,address);
}
void lcd_putc( char c) {
switch (c) {
case '\f' : lcd_send_byte(0,1);
lcdline=1;
delay_ms(2);
break;
case '\n' : lcd_gotoxy(1,++lcdline); break;
case '\b' : lcd_send_byte(0,0x10); break;
default : lcd_send_byte(1,c); break;
}
}
char lcd_getc( BYTE x, BYTE y) {
char value;
lcd_gotoxy(x,y);
lcd.rs=1;
value = lcd_read_byte();
lcd.rs=0;
return(value);
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Feb 02, 2006 12:22 am |
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You changed the compiler dependent code so it's now incorrect.
You should read that thread, because they explain why the ports
must change when you change the compiler (or PIC series, actually).
Also, what port are you using for the LCD ? |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Thu Feb 02, 2006 12:35 am |
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| im using port D...im sori but i think im confuse.. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Feb 02, 2006 12:42 am |
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The important point is that you must use the correct port address
for your PIC. I was trying to teach you something by having you
read that other post, but I guess not.
Delete all that code that you put in there, and then change
the lcd address line in LCD420.C to the following:
| Code: | | #byte lcd = 0xF83 // Address of Port D for the 18F452 |
If this doesn't work, then I suspect you have a hardware problem. |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Thu Feb 02, 2006 1:10 am |
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yeah it works...do u mind looking at my 485 code...?
im using to PIC,master/slave...to comunicate with each other...i got this source code from this forum...but still i doesnt work..hope u can help..
i try the master to send and the slave to receive first..
| Code: | //master
#include<18f452.h>
#fuses HS, NOWDT, NOLVP, NOBROWNOUT, NOPROTECT, PUT
#use delay(clock = 20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, enable=PIN_C5)
#define RS485_ID 0x10 // The device's RS485 master address
#define RS485_USE_EXT_INT TRUE // Select asynchronous serial interrupt
#include<RS485.c>
#include <lCD420.c>
#include <kbd.c>
int buffer[40];
int next_in = 0;
int next_out = 0;
#INT_RDA
void serial_isr()
{
int t;
buffer[next_in] = fgetc(RS485);
t = next_in;
next_in = (next_in+1) % sizeof(buffer);
if(next_in == next_out)
next_in=t; // Buffer full !!
}
void main(void)
{
int j;
char k;
int data_received[32];
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
lcd_init();
rs485_init();
kbd_init();
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
rs485_init();
//lcd_putc("\fReady...\n");
while(1)
{
rs485_wait_for_bus(FALSE);
//send address=0x11, length = 1, msg=3
if(rs485_send_message(0x11, 1, 3))
{
k=kbd_getc();
if(k!=0)
if(k=='*')
lcd_putc('\f');
else
lcd_putc(k);
/*output_low(PIN_B1);
delay_ms(100);
output_high(PIN_B1);
delay_ms(100);
output_low(PIN_B1);*/
//lcd_gotoxy(1,3);
//printf(lcd_putc, "\n\rADC (V):test\r\n");
//delay_ms(100);
}
delay_ms(5);
/*if(rs485_get_message(data_received, FALSE))
{
for(j=0; j<3; ++j)
data_received[j] = buffer[j];
if(data_received[2]==6) //if slave receives the number 3 successfully
{ //slave will send back number 6
lcd_gotoxy(1,4);
printf(lcd_putc, "\n\rADC (V):test\r\n");
delay_ms(100);
/*output_low(PIN_B2);
delay_ms(100);
output_high(PIN_B2);
delay_ms(100);
output_low(PIN_B2);
}
}*/
}
} |
/ | Code: | /slave
#include<18f452.h>
#fuses HS, NOWDT, NOLVP, NOBROWNOUT, NOPROTECT, PUT
#use delay(clock = 20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, enable=PIN_C5)
#define RS485_ID 0x11 // The device's RS485 slave address or ID
#define RS485_USE_EXT_INT TRUE // Select asynchronous serial interrupt
#include<RS485.c>
#include <lCD420.c>
#include <kbd.c>
int buffer[40];
int next_in = 0;
int next_out = 0;
#INT_RDA
void serial_isr()
{
int t;
buffer[next_in] = fgetc(RS485);
t = next_in;
next_in = (next_in+1) % sizeof(buffer);
if(next_in == next_out)
next_in=t; // Buffer full !!
}
void main()
{
int j;
char k;
int data_received[32];
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
lcd_init();
rs485_init();
kbd_init();
//lcd_putc("\fReady...\n");
while(1)
{
if(rs485_get_message(data_received, TRUE))
{
for(j=0; j<3; ++j)
data_received[j] = buffer[j];
if(data_received[0] == 0x11)
{
k=kbd_getc();
if(k!=0)
if(k=='*')
lcd_putc('\f');
else
lcd_putc(k);
//lcd_gotoxy(1,4);
//printf(lcd_putc, "\n\rADC (V):test\r\n");
//delay_ms(100);
/*output_low(PIN_B2);
delay_ms(100);
output_high(PIN_B2);
delay_ms(100);
output_low(PIN_B2);*/
rs485_wait_for_bus(FALSE);
//after receive successfully, respond to master by sending number 6
/*if(rs485_send_message(0x10, 1, 6))
{
lcd_putc("\fReadyAfsdfsd...\n");
//lcd_gotoxy(1,3);
//printf(lcd_putc, "\n\rADC (V):test\r\n");
//delay_ms(100);
/*output_low(PIN_B1);
delay_ms(100);
output_high(PIN_B1);
delay_ms(100);
output_low(PIN_B1);
}*/
}
}
}
} |
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crushneck
Joined: 27 Nov 2005
Posts: 29
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| Posted: Sat Feb 04, 2006 9:47 am |
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| anybody wanna help wit my 485? |
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