mainloop.c

KeilC51下的USB的slave设备源码,MCS51开发.

/*
   //*************************************************************************
   //
   //                  		ZLGMCU
   //				www.zlgmcu.com
   // File Name:	mainloop.C
   // Revision:		0.4(2002-07-08)
   // Author:		Liu Ying Bin
   // Use library:  USB51S.LIB
   // Note:			USB51S.LIB不带DMA控制功能
   //*************************************************************************
   */


#include <stdio.h>
#include <string.h>
#include <reg51.h>                /* special function register declarations   */
#include "mainloop.h"
#include "isr.h"
#include "protozlg.h"

/*
//*************************************************************************
//  Public static data
//*************************************************************************
*/

extern EPPFLAGS bEPPflags;
extern unsigned char idata GenEpBuf[];
extern unsigned char idata EpBuf[];
extern unsigned int data d12_addr;

extern unsigned int data D12_DATA;
extern unsigned int data D12_COMMAND;


sfr CKCON = 0x8F;//87C52x2用
//sbit clksel = P2^0;
sbit test_bit = P2^0;

//D12中断服务
usb_isr() interrupt 0
{
	DISABLE;
	fn_usb_isr();//调用D12中断服务子程序
	test_bit = ~ test_bit;
	ENABLE;
}

void main(void)
{
	P0 = 0xFF;//初始化I/O口
	P1 = 0xFF;
	P2 = 0xFF;
	P3 = 0xFF;

//	CKCON = 0x00;
	CKCON = 0x01;

//	if(clksel == 1)
//		CKCON = CKCON | 0x01;

	D12_DATA = 0xff02;			//定义数据地址
	D12_COMMAND = 0xff03;		//定义命令地址


	MCU_D12CS = 0x0;
	D12SUSPD = 0x0;

	IT0 = 0;//初始化中断
	EX0 = 1;
	PX0 = 0;
	EA = 1;

	MCU_D12CS = 0x1;
	MCU_D12CS = 0x0;
	D12_SetDMA(0x0);
	bEPPflags.value = 0;

	reconnect_USB();//联接USB总线

	/* Main program loop */
	while( TRUE ){
		if(bEPPflags.bits.configuration)
			check_key_LED();//连接正常,调用按键和LED控制处理

		usbserve();//USB服务数据处理

	} // Main Loop
}

void check_key_LED(void)
{
	static unsigned char c, last_key = 0xf;

	c = MCU_SWM0 & MCU_SWM1;
	c &= 0x0f;
	if (c != last_key) {
		D12_WriteEndpoint(3, 1, &c);//按键状态改变,发送信息给主机
	}
	last_key = c;

	if(bEPPflags.bits.ep1_rxdone) {
		DISABLE;//接收到主机发来的LED控制信息
		bEPPflags.bits.ep1_rxdone = 0;
		ENABLE;
		MCU_LED0 = !(GenEpBuf[3] & 0x1);//控制LED状态
		MCU_LED1 = !(GenEpBuf[3] & 0x2);
	}
}