********************************
File Name: UART.c
Dependencies: None
Processor: PIC16F/PIC18F
Compiler: CCS C
Company: vinasemiconductor
********************************
Chuong trinh co huong dan co ban ve truyen thong trong PIC,
Truyen nhan mot ky tu, mot chuoi va mot so integer len 2 cong COM
Ta co the su dung dong thoi bo UART cung va SUART (UART mem)
#include <16F877A.h>
//#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOPUT //No Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#FUSES RESERVED //Used to set the reserved FUSE bits
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_A2,rcv=PIN_A3,stream=COM1,errors) // COM1 su dung USART ( UART mem)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7,stream=COM2,errors) // COM2 su dung UART (UART cung)
void main()
{
int x=10,y=20;
char kytu_1,kytu_2;
char string[30],s[30];
fprintf(COM1,"COM1: Vinasemiconductor\n\r"); // truyen mot chuoi len cong COM1
delay_ms(100);
fprintf(COM2,"COM2: Vinasemiconductor\n\r"); // truyen mot chuoi len cong COM2
delay_ms(100);
fputc('A',COM1); // truyen mot ky tu len cong COM1
fprintf(COM1,"\n\r"); // xuong dong
delay_ms(100);
fputc('B',COM2); // truyen mot ky tu len cong COM2
fprintf(COM2,"\n\r"); // xuong dong
delay_ms(100);
fprintf(COM1,"%u\n\r",x); // truyen mot so integer len COM1
delay_ms(100);
fprintf(COM2,"%u\n\r",y); // truyen mot so integer len COM2
delay_ms(100);
while(1)
{
fgets(string,COM1); // nhan mot chuoi tu COM1
fprintf(COM1,"string=%s\n\r",string); // truyen len COM1 chuoi vua nhan
kytu_1 = fgetc(COM1); // nhan mot ky tu tu COM1
if(kytu_1=='1') // neu ky tu la '1' thi truyen len COM1 ky tu do
{
fputc(kytu_1,COM1);
}
fgets(string,COM2); // nhan mot chuoi tu COM2
fprintf(COM2,"string=%s\n\r",string); // truyen len COM2 chuoi vua nhan
kytu_2 = fgetc(COM2); // nhan mot ky tu tu COM2
if(kytu_2=='2')
{
fputc(kytu_2,COM2); // truyen len COM2 chuoi vua nhan
}
//delay_ms(500);
//value2 = fgetc(PC2);
//if (value1=='a')
//fprintf(PC1,"%u\n\r",x);
}
}
KẾT QUẢ MÔ PHỎNG
Chúc các bạn thành công!
Thanks and Best Regards
Nguyễn Ngọc Qui
Automation Engineer
Email: quinguyentgvn@gmail.com
Phone: 0938 430 305
