d12ci.c

small rtos在周立功的开发板dp51上的使用示例

#include "config.h"
#include "mainloop.h"
#include "d12ci.h"
#include "absacc.h"

#define D12_DATA 0xfb02
#define D12_COMMAND 0xfb03

#define outportb(a,b) XBYTE[(a)] = (b)
#define inportb(a) XBYTE[(a)]

extern EPPFLAGS bEPPflags;

//设置地址使能
void D12_SetAddressEnable(unsigned char bAddress, unsigned char bEnable)
{
	outportb(D12_COMMAND, 0xD0);//输出指令
	if(bEnable)
		bAddress |= 0x80;
	outportb(D12_DATA, bAddress);//设置地址
}

//设置端点使能
void D12_SetEndpointEnable(unsigned char bEnable)
{
	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
}

//模式设置
void D12_SetMode(unsigned char bConfig, unsigned char bClkDiv)
{
	outportb(D12_COMMAND, 0xF3);//设置模式
	outportb(D12_DATA, bConfig);
	outportb(D12_DATA, bClkDiv);
}

//DMA工作方式设置
void D12_SetDMA(unsigned char bMode)
{
	outportb(D12_COMMAND, 0xFB);//设置DMA工作方式
	outportb(D12_DATA, bMode);
}

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


//设置端点状态
void D12_SetEndpointStatus(unsigned char bEndp, unsigned char bStalled)
{
	outportb(D12_COMMAND, 0x40 + bEndp);//设置端点状态
	outportb(D12_DATA,  bStalled);
}

/*
//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;
	outportb(D12_COMMAND, 0xF5);//读取当前帧数目
	i= inportb(D12_DATA);
	j = inportb(D12_DATA);
	i += (j<<8);
	return i;
}
*/

/*
unsigned short D12_ReadChipID(void)
{
	unsigned short i,j;
	outportb(D12_COMMAND, 0xFD);
	i=inportb(D12_DATA);
	j=inportb(D12_DATA);
	i += (j<<8);
	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;
	outportb(D12_COMMAND, endp);
	if((inportb(D12_DATA) & D12_FULLEMPTY) == 0) {
		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);
	return j;
}

//写端点
unsigned char D12_WriteEndpoint(unsigned char endp, unsigned char len, unsigned char * buf)
{
    
	unsigned char i;
	outportb(D12_COMMAND, endp);
	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);
	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);
}

*/