uart.c

下位机程序

#include "myapp.h"
#define uart0_baudrate 115200
void uart0_init(void)
{
  rUFCON0 = 0x0;   //UART channel 0 FIFO control register, FIFO disable
  rUMCON0 = 0x0;   //UART chaneel 0 MODEM control register, AFC disable
  rULCON0 = 0x3;   //Line control register : Normal,No parity,1 stop,8 bits
  rUCON0  = 0x245;   // Control register
  rUBRDIV0=( (int)(sys_pclk/16./uart0_baudrate) -1 );   //Baud rate divisior register 0
}
void send_byte_uart0(unsigned char data)
{
 while(!(rUTRSTAT0 & 0x2));
 rUTXH0 = data;
}
unsigned char rec_byte_uart0(void)
{
 while(!(rUTRSTAT0 & 0x1)); 
 return rURXH0;
}