mcu.c

display port接受芯片ANX9813的驱动代码。MCU使用LPC936FDH,内部包含AN9813寄存器设置

//  *******************************************

//  *******************************************

#include <stdio.h>
#include <stdarg.h>
#include "i2c_intf.h"
#include "uart_int.h"
#include "timer.h"
#include "mcu.h"
#include "DP_RX_DRV.h"

bit EX_EN;
bit sendRQ;

bit enable_debug_output;
char test;

PUTCHAR_TYPE putchar(char c)
{
    if (!enable_debug_output)
        return c;
    EA = 0;
    if (c == '\n') {
        SBUF = 0x0d;
        while (!TI);
        TI = 0;
    }
    SBUF = c;
    while (!TI);
    TI = 0;
    EA = 1;
    return c;
//	stdout_port = c;
}

void debug_puts(char *s)
{
    if (enable_debug_output)
    	{
    	 	BP_DIR =1; 
        	puts(s);
		BP_DIR =0;
    	}
}


void SendToPCOneByte(uchar dat)
{
	EA = 0;
	BP_DIR =1;
	SBUF=dat;
	while(!TI);
	TI=0;
	BP_DIR =0;
	EA = 1;
}
//n=1,发送回车符号
void SendToPCSomeByte(uchar *dat,uchar j,uchar n)
{
	uchar i=0;
	EA = 0;
	BP_DIR =1;
	for(i=0;i<j;i++)
	{
		TI=0;
		SBUF=(*dat);				// start sending one byte
		while (!TI);				// wait until sent
		TI=0;
		dat++;
	}
	if(n==1)
	{
		TI=0;
		SBUF=0x0a;				// start sending one byte
		while (!TI);				// wait until sent
		TI=0;
		dat++;
	}
	BP_DIR =0;
	EA = 1;
}


/*
void debug_printf(char *s, ...)
{
    if (enable_debug_output) {
        va_list v;
        va_start(v, s);
        vprintf(s, v);
    }
}
*/
void delay_half_ms(void)
{
    unsigned char i;
    for(i = 0; i < 240; i ++)//delay about 0.5 ~ 1 ms
        ;
}
void InitMCU () 
	{

	P0M1 = 0x00;        // (00001110)push pull except RX
       P0M2 = 0x00;        // (11000000)

   	P1M1 = 0x00;        //(00101100)push pull except RX
	P1M2 = 0x00;

    	P2M1 = 0x00;    	// (01011000)push pull   0x58  0x20
    	P2M2 = 0x00;        // (00100000)  0xff  05.10.17//00		 /pull_p23

    	P3M1 = 0x03;    	  // (00000011)push pull  06.06.17
    	P3M2 = 0x00;        // (00000000)06.06.17
    
       DP_RX_HPD_DET = 0;
	init_serial(BAUD38400);
	init_timer(TINTVAL_8MS);
	start_timer();
	i2c_init();
       EX_EN = 0;
       EX1 = 0;
	ES=1;
	EA = 1;		// enable all interrupt
	DP_RX_HPD(0);
	sendRQ=0;

}

void DP_RX_HW_Reset(void)
{
    DP_Rx_HW_RESET = 0;
    delay_ms(10);
    DP_Rx_HW_RESET = 1;
    delay_ms(10);
}

void DP_RX_HPD(unsigned char high_low)
{
    if(high_low)
    {
        DP_RX_HPD_DET = 1;
        //debug_puts("Set HPD high");
    }
    else
    {
        DP_RX_HPD_DET = 0;
        //debug_puts("Set HPD low");
    }
}