main.c

200元买来的D12开发资料,包括上位机驱动和应用程序

#include <stdio.h>
#include <string.h>

#include <At89x52.h>

#include "hal.h"
#include "main.h"
#include "d12ci.h"
#include "chap9.h"
#include "protodma.h"
//USB标准请求函数组指针定义，不用修改
code void (*StandardDeviceRequest[])(void) =
{
	get_status,
	clear_feature,
	reserved,
	set_feature,
	reserved,
	set_address,
	get_descriptor,
	reserved,
	get_configuration,
	set_configuration,
	get_interface,
	set_interface,
	reserved,
	reserved,
	reserved,
	reserved
};
//厂商请求函数组定义，这里只是定义了一个函数，也可不加
code void (*VendorDeviceRequest[])(void) =
{
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	read_write_register,
	reserved,
	reserved,
	reserved
};
//公共变量
extern EPPFLAGS bEPPflags;
extern unsigned long ClockTicks;

extern unsigned char idata GenEpBuf[];
extern IO_REQUEST idata ioRequest;

extern unsigned char ioSize, ioCount;
extern unsigned char idata EpBuf[];
//------------
extern void fn_usb_isr(void);
//-----------

CONTROL_XFER ControlData;
//初始化时钟0
void init_timer0(void)
{
	TMOD &= 0XF0;                /* clear Timer 0   */
	TMOD  |= 0X1;
	TL0 = 0X0;                   /* value set by user    */
	TH0 = 0X0;                   /* value set by user  */
	ET0 = 1;     		     /* IE.1*/
	TR0 = 1;                     /* TCON.4 start timer  */
	PT0 = 1;
}
//初始化串口，这里可以不要
void init_serial(void)
{
	SCON = 0X52;		/* SCON: SM0|SM1|SM2|REN|TB8|RB8|TI|RI		*/
	PCON = 0X80 | PCON;	/* PCON: SMOD | - | - | - | GF1|GF0|PD |IDL|    */
	TMOD = 0X20;		/* TMOD: GATE|C/T|M1|M0|GATE|C/T|M1|M0 */
	TCON = 0x69;    	/* TCON: TF1|TR1|TF0|TR0|IE1|IT1|IE0|IT0 */
	TH1 = 0xF3;		/*TH1=0xF3: */
}
//模拟断开USB设备
void disconnect_USB(void)
{
	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK|D12_CLOCKRUNNING, D12_SETTOONE | D12_CLOCK_12M);
}
//模拟连接USB设备
void connect_USB(void)
{
	// reset event flags
	DISABLE;
	bEPPflags.value = 0;
	ENABLE;

	//	ENABLE_INTERRUPTS;
	D12_SetEndpointStatus(4, 0);
	D12_SetEndpointStatus(5, 0);
	// V2.1 enable normal+sof interrupt
	D12_SetDMA(D12_ENDP4INTENABLE | D12_ENDP5INTENABLE);

	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK |D12_CLOCKRUNNING|D12_SOFTCONNECT,D12_SETTOONE | D12_CLOCK_12M );

}
//模拟一次断开、连接操作
void reconnect_USB(void)
{
	unsigned long clk_cnt;

	D12SUSPD = 0;
	disconnect_USB();
    
	ENABLE;
	clk_cnt = ClockTicks;
	while(ClockTicks < clk_cnt + 20); //等待一段时间
	DISABLE;

	connect_USB();
}
//停止端点0
void stall_ep0(void)
{
	D12_SetEndpointStatus(0, 1);
	D12_SetEndpointStatus(1, 1);
}
//初始化配置0
void init_unconfig(void)
{
	D12_SetEndpointEnable(0);	/* Disable all endpoints but EPP0. */
}
//初始化配置1
void init_config(void)
{
	D12_SetEndpointEnable(1);	/* Enable  generic/iso endpoints. */
}
//简单传输
void single_transmit(unsigned char * buf, unsigned char len)
{
	if( len <= EP0_PACKET_SIZE) {
		D12_WriteEndpoint(1, len, buf);
	}
}
//代码传输
void code_transmit(unsigned char code * pRomData, unsigned short len)
{
	ControlData.wCount = 0;
	if(ControlData.wLength > len)
		ControlData.wLength = len;

	ControlData.pData = pRomData;
	if( ControlData.wLength >= EP0_PACKET_SIZE) {	// 如果发送代码大于包长度
		D12_WriteEndpoint(1, EP0_PACKET_SIZE, ControlData.pData);
		ControlData.wCount += EP0_PACKET_SIZE;

		DISABLE;
		bEPPflags.bits.control_state = USB_TRANSMIT;
		ENABLE;
	}
	else {						//发送代码小于包长度
		D12_WriteEndpoint(1, ControlData.wLength, pRomData);
		ControlData.wCount += ControlData.wLength;
		DISABLE;
		bEPPflags.bits.control_state = USB_IDLE;
		ENABLE;
	}
}
//控制请求
void control_handler()
{
	unsigned char type, req;

	type = ControlData.DeviceRequest.bmRequestType & USB_REQUEST_TYPE_MASK;	//0x60
	req = ControlData.DeviceRequest.bRequest & USB_REQUEST_MASK;		//0x0F

	if (type == USB_STANDARD_REQUEST)
		(*StandardDeviceRequest[req])();
	else if (type == USB_VENDOR_REQUEST)
		(*VendorDeviceRequest[req])();
	else
		stall_ep0();

}


//-------------------------------------------
//主程序
//-------------------------------------------

void main()
{
	unsigned char  i;
	P0 = 0xFF;//初始化端口
	P1 = 0xFF;
	P2 = 0xFF;
	P3 = 0xFF;
	D12SUSPD = 0;//D12非挂起
	init_serial();//初始化串口
	init_timer0();//初始化时钟T0
	EA = 0;
	IE0=0;
	IT0=0;
	EX0=1;
      
	ENABLE;
	reconnect_USB();
	ENABLE;
    
	while( TRUE ){

		if (bEPPflags.bits.timer){//TO 定时到
			DISABLE;
			bEPPflags.bits.timer = 0;
			ENABLE;
		}
		if (bEPPflags.bits.bus_reset) {//发现总线复位请求
			DISABLE;
			bEPPflags.bits.bus_reset = 0;
			ENABLE;
			D12SUSPD=0; //唤醒D12
		} 
		if (bEPPflags.bits.suspend) {//发现总线挂起请求,将D12挂起
			DISABLE;
			bEPPflags.bits.suspend= 0;
			ENABLE;

			if(D12SUSPD == 1) {
				D12SUSPD = 0;
				P0 = 0xFF;
				P1 = 0xFF;
				P2 = 0xFF;
				P3 = 0xFF;
				D12_SetDMA(0xC3);
				D12SUSPD = 1;
				PCON |= 0x02;
				while (1);

			}
		} 
		if (bEPPflags.bits.setup_packet){ //USB控制请求（包括标准请求和厂商请求）
			DISABLE;
			bEPPflags.bits.setup_packet = 0;
			ENABLE;
			control_handler();
			D12SUSPD=0;
		} 
    }
}