main.c

用LPC936实现通过SPI扩展多个串口,在这里实现了对多个通道的管理,C代码,

#include "uart.h"
#include "spi.h"
#include "slip.h"
#include "timer.h"

void init_system(void)
{
	P0M1=0x00;
	P0M2=0xFF;
	P1M1=0x18;
	P1M2=0xE5;
	P2M1=0x00;
	P2M2=0x00;
	P3M1=0x00;
	P3M2=0x01;

	IP0H=0x02;
	IP0=0x00;
	IP1H=0x00;
	IP1=0x08;

	TRIM&=0x3f;
	DIVM=0x00;
}

void main()
{
	init_system();
	init_spi();
	init_slip();
	init_uart();
	EA = 1;
	open_uart(1);
	flow_ctr_enable = 1;
	term_ctr_enable = 1;

	while(1){
		spi_scan();
		uart_scan();
		slip_scan();
	}
}