d12ci.c

是关于pdiusbd12完整固件程序代码

	#include <reg51.h>                /* special function register declarations   */
	#include "mainloop.h"
	#include "d12ci.h"
	#include "absacc.h"
	#include "epphal.h"

	#define D12_DATA 0xff02
	#define D12_COMMAND 0xff03

	extern EPPFLAGS bEPPflags;

	//设置地址使能
	void D12_SetAddressEnable(unsigned char bAddress, unsigned char bEnable)
	{
		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xD0);//输出指令
		if(bEnable)
			bAddress |= 0x80;
		outportb(D12_DATA, bAddress);//设置地址

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;
	}

	//设置端点使能
	void D12_SetEndpointEnable(unsigned char bEnable)
	{
		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xD8);//输出指令
		if(bEnable)
			outportb(D12_DATA, 1);//设置端点允许
		else
			outportb(D12_DATA, 0);//设置端点禁止

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;
	}

	//模式设置
	void D12_SetMode(unsigned char bConfig, unsigned char bClkDiv)
	{
		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xF3);//设置模式
		outportb(D12_DATA, bConfig);
		outportb(D12_DATA, bClkDiv);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;
	}

	//DMA工作方式设置
	void D12_SetDMA(unsigned char bMode)
	{
		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xFB);//设置DMA工作方式
		outportb(D12_DATA, bMode);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;
	}

	//读取中断寄存器
	unsigned short D12_ReadInterruptRegister(void)
	{
		unsigned char b1;
		unsigned int j;

		outportb(D12_COMMAND, 0xF4);//读取中断寄存器
		b1 = inportb(D12_DATA);
		j = inportb(D12_DATA);

		j <<= 8;
		j += b1;

		return j;
	}

	//端点选择
	unsigned char D12_SelectEndpoint(unsigned char bEndp)
	{
		unsigned char c;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, bEndp);//端点选择
		c = inportb(D12_DATA);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return c;
	}

	//读取最后传输状态
	unsigned char D12_ReadLastTransactionStatus(unsigned char bEndp)
	{
		outportb(D12_COMMAND, 0x40 + bEndp);//返回最后传输状态
		return inportb(D12_DATA);
	}

	//读取端点状态
	unsigned char D12_ReadEndpointStatus(unsigned char bEndp)
	{
		unsigned char c;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0x80 + bEndp);//读取端点状态
		c = inportb(D12_DATA);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return c;
	}

	//设置端点状态
	void D12_SetEndpointStatus(unsigned char bEndp, unsigned char bStalled)
	{
		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0x40 + bEndp);//设置端点状态
		outportb(D12_DATA, bStalled);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;
	}

	//传输恢复
	void D12_SendResume(void)
	{
		outportb(D12_COMMAND, 0xF6);//设置发送恢复
	}

	//读取当前帧号
	unsigned short D12_ReadCurrentFrameNumber(void)
	{
		unsigned short i,j;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xF5);//读取当前帧数目
		i= inportb(D12_DATA);
		j = inportb(D12_DATA);

		i += (j<<8);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return i;
	}

	unsigned short D12_ReadChipID(void)
	{
		unsigned short i,j;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, 0xFD);
		i=inportb(D12_DATA);
		j=inportb(D12_DATA);
		i += (j<<8);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return i;
	}

	//读取端点数据
	unsigned char D12_ReadEndpoint(unsigned char endp, unsigned char len, unsigned char * buf)
	{
		unsigned char i, j;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;

		outportb(D12_COMMAND, endp);
		if((inportb(D12_DATA) & D12_FULLEMPTY) == 0) {
			if(bEPPflags.bits.in_isr == 0)
				ENABLE;
			return 0;
		}

		outportb(D12_COMMAND, 0xF0);
		j = inportb(D12_DATA);
		j = inportb(D12_DATA);

		if(j > len)
			j = len;

		for(i=0; i<j; i++)
			*(buf+i) = inportb(D12_DATA);

		outportb(D12_COMMAND, 0xF2);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return j;
	}

	//写端点
	unsigned char D12_WriteEndpoint(unsigned char endp, unsigned char len, unsigned char * buf)
	{
		unsigned char i;

		if(bEPPflags.bits.in_isr == 0)
			DISABLE;// 

		outportb(D12_COMMAND, endp);
		i = inportb(D12_DATA);

		outportb(D12_COMMAND, 0xF0);
		outportb(D12_DATA, 0);
		outportb(D12_DATA, len);

		for(i=0; i<len; i++)
			outportb(D12_DATA, *(buf+i));

		outportb(D12_COMMAND, 0xFA);

		if(bEPPflags.bits.in_isr == 0)
			ENABLE;

		return len;
	}

	//设置端点应答
	void D12_AcknowledgeEndpoint(unsigned char endp)
	{
		outportb(D12_COMMAND, endp);
		outportb(D12_COMMAND, 0xF1);
		if(endp == 0)
			outportb(D12_COMMAND, 0xF2);
	}

	//输出数据
	void outportb(unsigned int Addr, unsigned char Data)
	{
		*((unsigned char xdata *) Addr) = Data;
	}

	//输入数据
	unsigned char inportb(unsigned int Addr)
	{
		return *((unsigned char xdata *) Addr);
	}