usb_hid_host.c

来自「Freescale MCF5445evb 参考测试代码」· C语言 代码 · 共 534 行 · 第 1/2 页

	/* data for Set Address command */
	buf0[0] = 0x00050000 | ((0x7F & device_address) <<8);
	buf0[1] = 0x00000000;
	
    usb_qtd1 = usb_qtd_init(0x8, 0, SETUP_PID, buf0);
    usb_qtd2 = usb_qtd_init(0x0, 1, IN_PID, 0);

    usb_qtd1->next_qtd = (uint32)usb_qtd2;    
    
	/* Point the QH to the linked list of qTDs */
	usb_qh_ep0->next_qtd = (uint32)usb_qtd1;
    
	/* Wait for transaction to complete */
	while (!((MCF_USB_USBSTS&MCF_USB_USBSTS_UI) |
			(MCF_USB_USBSTS&MCF_USB_USBSTS_UEI)));
	
    /* Check for errors */
  	if( MCF_USB_USBSTS & MCF_USB_USBSTS_UEI)
    {
    	printf("ERROR!!!\n");
	    temp = *(uint32 *)(MCF_USB_ASYNCLISTADDR + 0x18);
        printf("qTD status = 0x%08x\n",temp);	
     }
     else
     {
     	printf("Set address command complete!!\n\n");
		#ifdef DEBUG_PRINT	
        	printf("USBSTS = 0x%08x\n",MCF_USB_USBSTS);
    	#endif
    }
	/* Clear the USB interrupt status bit */
	MCF_USB_USBSTS |= (MCF_USB_USBSTS_UI | MCF_USB_USBSTS_UEI);
	
	/* Change the device address in the QH to the new value */
	usb_qh_ep0->ep_char |= USB_QH_EP_CHAR_DEV_ADDR(device_address);
	
    /* Return memory for descriptors to the heap */
    free((void *)usb_qtd1->malloc_ptr);
    free((void *)usb_qtd2->malloc_ptr);
}
/********************************************************************/
void get_dev_desc(USB_QH * usb_qh_ep0, uint8 * device_descriptor, uint32 device_address)
{
	USB_QTD * usb_qtd1, *usb_qtd2, *usb_qtd3;
	uint32 i, temp;
	uint32 buf0[MAX_USB_BUFFER_SIZE];
	
	/* data for Get Descriptor command */
	buf0[0] = 0x80060001;
	buf0[1] = 0x00001200;
		
    usb_qtd1 = usb_qtd_init(0x8, 0, SETUP_PID, buf0);
    usb_qtd2 = usb_qtd_init(0x40, 0, IN_PID, (uint32*) device_descriptor);
    usb_qtd3 = usb_qtd_init(0x0, 1, OUT_PID, 0);

    usb_qtd1->next_qtd = (uint32)usb_qtd2;
    usb_qtd2->next_qtd = (uint32)usb_qtd3;   
    
	/* Point the QH to the linked list of qTDs */
	usb_qh_ep0->next_qtd = (uint32)usb_qtd1;
        	
    MCF_USB_ASYNCLISTADDR = (uint32) usb_qh_ep0;
    	
	/* Wait for transaction to complete */
	while (!((MCF_USB_USBSTS&MCF_USB_USBSTS_UI) |
			(MCF_USB_USBSTS&MCF_USB_USBSTS_UEI)));
	
    /* Check for errors */
  	if( MCF_USB_USBSTS & MCF_USB_USBSTS_UEI)
    {
    	printf("ERROR!!!\n");
	    temp = *(uint32 *)(MCF_USB_ASYNCLISTADDR + 0x18);
        printf("qTD status = 0x%08x\n",temp);	
        for(i=0; i<5; i++)
        	device_descriptor[i] = 0;
     }
     else
     {
     	printf("Device descriptor has been read!!\n\n");
		#ifdef DEBUG_PRINT	
        	printf("USBSTS = 0x%08x\n",MCF_USB_USBSTS);
    	#endif
    }

	#ifdef DEBUG_PRINT	
		for( i=0; i<0x12; i++)
        	printf("device_descriptor[%02x] = 0x%02x\n",i,device_descriptor[i]);	
	#endif
    
	/* Clear the USB interrupt status bit */
	MCF_USB_USBSTS |= (MCF_USB_USBSTS_UI | MCF_USB_USBSTS_UEI);
	
	/* Set the max packet size in the QH to the max packet size in the device descriptor */
	usb_qh_ep0->ep_char = ((usb_qh_ep0->ep_char & ~USB_QH_EP_CHAR_MAX_PACKET(0xFFF))
								| USB_QH_EP_CHAR_MAX_PACKET(device_descriptor[0x7]));	

    /* Return memory for descriptors to the heap */
    free((void *)usb_qtd1->malloc_ptr);
    free((void *)usb_qtd2->malloc_ptr);
    free((void *)usb_qtd3->malloc_ptr);       
}
/********************************************************************/
void get_config_desc(USB_QH * usb_qh_ep0, uint8 *cfg_desc, int length)
{
	USB_QTD * usb_qtd1, *usb_qtd2, *usb_qtd3;
	uint32 i, temp;
	uint32 buf0[MAX_USB_BUFFER_SIZE];
	
	/* data for Get Configuration Descriptor command */
	buf0[0] = 0x80060002;
	buf0[1] = ((length & 0x00FF) << 8) | ((length & 0xFF00) >> 8);
		
    usb_qtd1 = usb_qtd_init(0x8, 0, SETUP_PID, buf0);
    usb_qtd2 = usb_qtd_init(length, 0, IN_PID, (uint32 *)cfg_desc);
    usb_qtd3 = usb_qtd_init(0x0, 1, OUT_PID, 0);

    usb_qtd1->next_qtd = (uint32)usb_qtd2;
    usb_qtd2->next_qtd = (uint32)usb_qtd3;    
    
	/* Point the QH to the linked list of qTDs */
	usb_qh_ep0->next_qtd = (uint32)usb_qtd1;
        	
	/* Wait for transaction to complete */
	while (!((MCF_USB_USBSTS&MCF_USB_USBSTS_UI) |
			(MCF_USB_USBSTS&MCF_USB_USBSTS_UEI)));
	
    /* Check for errors */
  	if( MCF_USB_USBSTS & MCF_USB_USBSTS_UEI)
    {
    	printf("ERROR!!!\n");
	    temp = *(uint32 *)(MCF_USB_ASYNCLISTADDR + 0x18);
        printf("qTD status = 0x%08x\n",temp);	
        for(i=0; i<3; i++)
        	config_descriptor[i] = 0;
     }
     else
     {
		#ifdef DEBUG_PRINT	
	     	printf("Configuration descriptor has been read!!\n\n");
        	printf("USBSTS = 0x%08x\n",MCF_USB_USBSTS);
    	#endif
    }

	/* Clear the USB interrupt status bit */
	MCF_USB_USBSTS |= (MCF_USB_USBSTS_UI | MCF_USB_USBSTS_UEI);
	
    /* Return memory for descriptors to the heap */
    free((void *)usb_qtd1->malloc_ptr);
    free((void *)usb_qtd2->malloc_ptr);
    free((void *)usb_qtd3->malloc_ptr);       
}
/********************************************************************/
void set_configuration(USB_QH * usb_qh_ep0, uint32 config_value, uint32 device_address)
{
	USB_QTD * usb_qtd1, *usb_qtd2;
	uint32 temp;
	uint32 buf0[MAX_USB_BUFFER_SIZE];

	/* data for Set Address command */
	buf0[0] = 0x00090000 | ((0x7F & config_value) <<8);
	buf0[1] = 0x00000000;
	
    usb_qtd1 = usb_qtd_init(0x8, 0, SETUP_PID, buf0);
    usb_qtd2 = usb_qtd_init(0x0, 1, IN_PID, 0);

    usb_qtd1->next_qtd = (uint32)usb_qtd2;    
    
	/* Point the QH to the linked list of qTDs */
	usb_qh_ep0->next_qtd = (uint32)usb_qtd1;
    
    /* Enable async schedule */
//	MCF_USB_USBCMD |= MCF_USB_USBCMD_ASE;
	
	/* Wait for asynchronous schedule to enable */
//	while (!(MCF_USB_USBSTS & MCF_USB_USBSTS_AS));

	/* Wait for transaction to complete */
	while (!((MCF_USB_USBSTS&MCF_USB_USBSTS_UI) |
			(MCF_USB_USBSTS&MCF_USB_USBSTS_UEI)));
	
    /* Check for errors */
  	if( MCF_USB_USBSTS & MCF_USB_USBSTS_UEI)
    {
    	printf("ERROR!!!\n");
	    temp = *(uint32 *)(MCF_USB_ASYNCLISTADDR + 0x18);
        printf("qTD status = 0x%08x\n",temp);	
     }
     else
     {
     	printf("Set configuration command complete!!\n\n");
		#ifdef DEBUG_PRINT	
        	printf("USBSTS = 0x%08x\n",MCF_USB_USBSTS);
    	#endif
    }
	/* Clear the USB interrupt status bit */
	MCF_USB_USBSTS |= (MCF_USB_USBSTS_UI | MCF_USB_USBSTS_UEI);
	
    /* Return memory for descriptors to the heap */
    free((void *)usb_qtd1->malloc_ptr);
    free((void *)usb_qtd2->malloc_ptr);
}
/********************************************************************/
void get_report_desc(USB_QH * usb_qh_ep0, uint8 * report_descriptor, uint32 device_address)
{
	USB_QTD * usb_qtd1, *usb_qtd2, *usb_qtd3;
	uint32 i, temp;
	uint32 buf0[MAX_USB_BUFFER_SIZE];
	
	/* data for Get Configuration Descriptor command */
	buf0[0] = 0x81060022;
	buf0[1] = 0x00007400;
		
    usb_qtd1 = usb_qtd_init(0x8, 0, SETUP_PID, buf0);
    usb_qtd2 = usb_qtd_init(0x74, 0, IN_PID, (uint32 *)report_descriptor);
    usb_qtd3 = usb_qtd_init(0x0, 1, OUT_PID, 0);

    usb_qtd1->next_qtd = (uint32)usb_qtd2;
    usb_qtd2->next_qtd = (uint32)usb_qtd3;
        
	/* Point the QH to the linked list of qTDs */
	usb_qh_ep0->next_qtd = (uint32)usb_qtd1;
        	
    /* Enable async schedule */
//	MCF_USB_USBCMD |= MCF_USB_USBCMD_ASE;
	
	/* Wait for asynchronous schedule to enable */
//	while (!(MCF_USB_USBSTS & MCF_USB_USBSTS_AS));

	/* Wait for transaction to complete */
	while (!((MCF_USB_USBSTS&MCF_USB_USBSTS_UI) |
			(MCF_USB_USBSTS&MCF_USB_USBSTS_UEI)));
	
    /* Check for errors */
  	if( MCF_USB_USBSTS & MCF_USB_USBSTS_UEI)
    {
    	printf("ERROR!!!\n");
	    temp = *(uint32 *)(MCF_USB_ASYNCLISTADDR + 0x18);
        printf("qTD status = 0x%08x\n",temp);	
        for(i=0; i<3; i++)
        	report_descriptor[i] = 0;
    }
    else
    {
		#ifdef DEBUG_PRINT	
	     	printf("Report descriptor has been read!!\n\n");
        	printf("USBSTS = 0x%08x\n",MCF_USB_USBSTS);
    	#endif
    }

	#ifdef DEBUG_PRINT	
		i=0;
		while (!((report_descriptor[i-1] == 0xC0) & (report_descriptor[i-2] == 0xC0))) 
        {
        	printf("report_descriptor[%02x] = 0x%02x\n",i,report_descriptor[i]);	
        	i++;
        }
	#endif
    
	/* Clear the USB interrupt status bit */
	MCF_USB_USBSTS |= (MCF_USB_USBSTS_UI | MCF_USB_USBSTS_UEI);
	
    /* Return memory for descriptors to the heap */
    free((void *)usb_qtd1->malloc_ptr);
    free((void *)usb_qtd2->malloc_ptr);
    free((void *)usb_qtd3->malloc_ptr);       
}