RS232 problem (not receive the data from the computer)

[Evan]

hell All:

I have an 18f4550 and MAX3232CPE chip that i am using to communicate with a computer (hyperterminal).

RS232_PIN_2 ----PIN7_MAX3232_PIN10---------PIN_A3_18f4550
RS232_PIN_3 ----PIN8_MAX3232_PIN9---------PIN_A2_18f4550

sending data to the computer using printf==>OK

But not receive the data from the computer

#include <18F4550.h>
#fuses hs,NOWDT,PROTECT,NOLVP,NODEBUG,MCLR,NOVREGEN
#use delay (clock=8000000)
#use rs232(baud=9600,parity=N, xmit=PIN_A3,rcv=PIN_A2,bits=8)
/////////////////////////////////////////////////////////////
void main(void){
char c;
printf("\r\n\RS-232 int is ok \r\n\n"); // have display ,is ok
while(TRUE){
c = getc(); //have problem!!!
putc(c); //no display is NG
printf("\r\nSize: %u Bytes\r\n",c); //no display is NG
}

}

[Evan]

[ckielstra]

In the PIC processor the I/O pins are multiplexed for use by several hardware functions. On program startup you have to configure the I/O pins for the hardware function that you want to use. Check the datasheet of the PIC18F4550, Table 10-1 for pin A2:

[Evan]

Hi ckielstra

Now is the same question =>not receive the data from the computer.

Im using the hardware SPI on pins C7,B0,B1 Connection SD CARD .
Thanks for your reply．
Evan