usbisr.c

网上收集的利用nios软核

#include "usbISR.h"
#include "uart.h"
usbEp0OutHandler(usbEnuFsm * usbEnuStatus)
{
	//raiseLevel();
	usb_1362_LockDevice(0xaa37);
	int i;
	int bufLength;
	uartPrintf("in the ep0 out handler\n");
	printf("in the ep0 out handler\n");
/*1. read host request*/
	bufLength = usb_1362_device_epx_read(0, usbEnuStatus->rxBuf);

	if(usbEnuStatus->ep0Status & 0x04){
	usb_1362_device_0_write(ISP_1363_Acknowledge_Set_Up);//ack the set-up packet
	usb_1362_device_0_write(ISP_1362_EP0_OUT_Clear_Buffer_reg);//clear buffer
	//usbEnuStatus->ep0Status = usb_1362_device_16_read(ISP_1362_DcEndpointStatus_EP0_OUT_Read_reg);	
		}
/*2. check the request*/
	usbEnuStatus->usbRequest = analyseUsbRequest((char*)(usbEnuStatus->rxBuf));

	uartPrintf("[uart]usb request:%d\n",usbEnuStatus->usbRequest);
	printf("[uart]usb request:%d\n",usbEnuStatus->usbRequest);
	printf("ep0 status:%x\n",usbEnuStatus->ep0Status);
/*3. Do the request*/
	if(!(usbEnuStatus->ep0Status & 0x60)){
		printf("EP0: buffer not full. exit....\n");
		usb_1362_epx_transmit(0,NULL,0);
		//usb_1362_device_0_write(ISP_1362_EP0_OUT_Clear_Buffer_reg);//clear buffer
		return;
		}
	else if((usbEnuStatus->ep0Status & 0x04)){
		if(usbEnuStatus->usbRequest == -1){
			usb_1362_ep0_stall();
			printf("EP0 Stall!\n");
			return;
			}                          
		doUsbStandardRequest(usbEnuStatus);
		}
	else{
		
		printf("EP0:Do nothing\n");
		}					
}