Estou tentando fazer uma simulação aqui no proteus antes de montar o hardware mas não estou tendo nenhum sucesso.
Tentei usar aquele exemplo do CCS mas parece que ele não funciona, dai fico na duvida se fiz algo errado.
Seguem abaixo o codigo C e o circuito no proteus.
- Código: Selecionar todos
/////////////////////////////////////////////////////////////////////////
//// EX_RS485_CHAT.C ////
//// ////
//// Converts RS485 data and puts it onto RS232 data line. ////
//// ////
//// Jumpers: ////
//// PCM,PCH pin B2 to RS232 RX, pin B1 to RS232 TX ////
//// ////
//// ////
//// The following conditional compilation lines are used to ////
//// include a valid device for each compiler. Change the device, ////
//// clock and RS232 pins for your hardware if needed. ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2005 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////
#include <18f4550.h>
#device *=16
#fuses HS, NOWDT, NOLVP, NOBROWNOUT, NOPROTECT, PUT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_B2, rcv=PIN_B1, ENABLE=PIN_B0)
#define RS485_RX_BUFFER_SIZE 64
#define RS485_USE_EXT_INT TRUE
int8 OUR_RS485_ID = 0;
#define RS485_ID OUR_RS485_ID
#include <rs485.c>
#include <stdlib.h>
int8 in_char = 0;
int8 next_in = 0;
int8 next_out = 0;
int8 msg[64];
#INT_TIMER1
void timer1_isr()
{
int8 i;
printf("timer");
if(rs485_get_message(msg, FALSE))
{
printf("\n\r mensagem recebida %d: ", msg[0]);
for(i=0; i < msg[1]; ++i)
putc(msg[i+2]);
printf("\n\r");
}
}
void RS485send(char* s, int8 id)
{
int8 size;
for(size=0; s[size]!='\0'; ++size);
printf("esperando pelo barramento");
rs485_wait_for_bus(FALSE);
printf("barramento liberado para envio");
while(!rs485_send_message(id, size, s))
delay_ms(OUR_RS485_ID);
printf("Envio efetuado!");
}
char PCgetc()
{
in_char = 0;
while(!kbhit());
in_char = getc();
return in_char;
}
int8 PCgetInt()
{
int8 i, s[3];
for(i=0; (s[i]=PCgetc()) != '\r' && i<3; ++i);
return atoi(s);
}
char* PCgetMsg()
{
int8 i;
for(i=0; (msg[i] = PCgetc()) != '\r' && i<64; ++i);
msg[i] = '\0';
return &(msg[0]);
}
void get_string(char* s, unsigned int8 max) {
unsigned int8 len;
char c;
--max;
len=0;
do {
c=getc();
if(c==8) { // Backspace
if(len>0) {
len--;
putc(c);
putc(' ');
putc(c);
}
} else if ((c>=' ')&&(c<='~'))
if(len<=max) {
s[len++]=c;
putc(c);
}
} while(c!=13);
s[len]=0;
}
signed int8 get_int() {
char s[5];
signed int8 i;
get_string(s, 5);
i=atoi(s);
//printf("get int %d", i);
return(i);
}
#INT_RDA
void serial_isr()
{
printf("INT RDA");
if(kbhit())
in_char = get_int;
//in_char = fgetc(PC);
}
void main()
{
int8 i, send_addr = 0;
char command;
int8 inteiro;
char *teste;
setup_timer_1(T1_INTERNAL | T1_DIV_BY_1);
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
rs485_init();
while(OUR_RS485_ID == 0 || OUR_RS485_ID >= 255)
{
printf("Please choose a network ID (1-255): ");
//inteiro = get_int();
//printf("%s",inteiro);
OUR_RS485_ID = PCgetInt();
//OUR_RS485_ID = inteiro;
}
printf("\n\rYour ID is: %d\n\r\n\rIf you require assistance, press h.\n\r", OUR_RS485_ID);
while(command != 'Q')
{
enable_interrupts(INT_TIMER1);
command = toupper(PCgetc());
//disable_interrupts(INT_TIMER1);
switch(command)
{
case 'S':
if(send_addr == 0 || send_addr > 255)
{
printf("\n\r\n\rEnter send address (1-255): ");
send_addr =get_int();
}
printf("\n\r%d:>", send_addr);
//RS485send(PCgetint(), send_addr);
RS485send(teste, send_addr);
printf("Msg enviada \n\r");
break;
case 'C':
send_addr = 0;
while(send_addr == 0 || send_addr > 255)
{
printf("\n\r\n\rEnter send address (1-255): ");
send_addr = PCgetint();
printf("\n\r");
}
break;
case 'I':
OUR_RS485_ID = 0;
while(OUR_RS485_ID == 0 || OUR_RS485_ID >= 255)
{
printf("\n\rPlease choose a network ID (1-255): ");
OUR_RS485_ID = PCgetint();
}
printf("\n\rYour ID is: %d\n\r\n\r", OUR_RS485_ID);
break;
case 'H':
printf("\n\rCommands: (S)end message, (C)hange Send Address, ");
printf("Change (I)D, (H)elp, (Q)uit.\n\r");
break;
default:
if(command != 'Q')
printf("\n\rInvalid command!\n\r");
}
}
}
e aqui segue o esquematico:
Se facilitar, segue o download do circuito no proteus: http://www.mediafire.com/?mnnzzdn1znw
Agradeço muito se alguem puder ajudar!
ps.: apenas usei o 18f4550 pq são os que tenho disponíveis aqui para testes.