usbd12.c

基于AVR的USB单片机的源代码,其中部分代码被用在产品上.

//===================================================================//
//					Augest, 25, 2002		The Last Modified Date
//===================================================================//

#include "AvrUsb.H"

extern AVRUSBFLAGS bAvrUsbFlags;

void USBD12_SetAddressEnable(unsigned char bAddress, unsigned char bEnable)
{
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0xD0);
	if(bEnable)
		bAddress |= 0x80;
	outportb(IC_D12_DATA, bAddress);
	
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;
}

void USBD12_SetEndpointEnable(unsigned char bEnable)
{
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0xD8);
	if(bEnable)
		outportb(IC_D12_DATA, 1);
	else
		outportb(IC_D12_DATA, 0);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;
}

void USBD12_SetMode(unsigned char bConfig, unsigned char bClkDiv)
{
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0xF3);
	outportb(IC_D12_DATA, bConfig);
	outportb(IC_D12_DATA, bClkDiv);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;
}

void USBD12_SetDMA(unsigned char bMode)
{
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0xFB);
	outportb(IC_D12_DATA, bMode);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;
}

unsigned short USBD12_ReadInterruptRegister(void)
{
	unsigned char b1;
	unsigned int j;

	outportb(IC_D12_COMMAND, 0xF4);
	b1 = inportb(IC_D12_DATA);
	j = inportb(IC_D12_DATA);

	j <<= 8;
	j += b1;

	return j;
}

unsigned char USBD12_SelectEndpoint(unsigned char bEndp)
{
	unsigned char c;

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, bEndp);
	c = inportb(IC_D12_DATA);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;

	return c;
}

unsigned char USBD12_ReadLastTransactionStatus(unsigned char bEndp)
{
	unsigned char nVal;

	outportb(IC_D12_COMMAND, 0x40 + bEndp);
	nVal = inportb(IC_D12_DATA);

	return nVal;
}


void USBD12_SetEndpointStatus(unsigned char bEndp, unsigned char bStalled)
{
	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0x40 + bEndp);
	outportb(IC_D12_DATA, bStalled);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;
}

unsigned char USBD12_ReadEndpoint(unsigned char endp, unsigned char * buf, unsigned char len)
{
	unsigned char i, j, k = 0;

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, endp);
	if((inportb(IC_D12_DATA) & USBD12_FULLEMPTY) == 0) {
		if(bAvrUsbFlags.bits.bIN_ISR == 0)
			ENABLE_INTERRUPTS;
		return 0;
	}

	outportb(IC_D12_COMMAND, 0xF0);
	j = inportb(IC_D12_DATA);
	j = inportb(IC_D12_DATA);

	if(j > len)
		j = len;

	for(i=0; i<j; i++)
		*(buf+i) = inportb(IC_D12_DATA);

	outportb(IC_D12_COMMAND, 0xF2);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;

	return j;
}

unsigned char USBD12_ReadEndpointStatus(unsigned char bEndp)
{
	unsigned char c;

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, 0x80 + bEndp);
	c = inportb(IC_D12_DATA);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;

	return c;
}

unsigned char USBD12_WriteEndpoint(unsigned char endp, unsigned char * buf, unsigned char len)
{
	unsigned char i;

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, endp);
	inportb(IC_D12_DATA);

	outportb(IC_D12_COMMAND, 0xF0);
	outportb(IC_D12_DATA, 0);
	outportb(IC_D12_DATA, len);

	for(i=0; i<len; i++)
		outportb(IC_D12_DATA, *(buf+i));

	outportb(IC_D12_COMMAND, 0xFA);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;

	return len;
}

unsigned char USBD12_WriteEndpointRom(unsigned char endp,const unsigned char* buf, unsigned char len)
{
	unsigned char i;

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		DISABLE_INTERRUPTS;

	outportb(IC_D12_COMMAND, endp);
	inportb(IC_D12_DATA);

	outportb(IC_D12_COMMAND, 0xF0);
	outportb(IC_D12_DATA, 0);
	outportb(IC_D12_DATA, len);

	for(i=0; i<len; i++)
		outportb(IC_D12_DATA, *(buf+i));

	outportb(IC_D12_COMMAND, 0xFA);

	if(bAvrUsbFlags.bits.bIN_ISR == 0)
		ENABLE_INTERRUPTS;

	return len;
}


void USBD12_AcknowledgeEndpoint(unsigned char endp)
{

	outportb(IC_D12_COMMAND, endp);
	outportb(IC_D12_COMMAND, 0xF1);
	if(endp == 0)
		outportb(IC_D12_COMMAND, 0xF2);
	
}