mass_cbitrance.c

usb host在ARM7上的实现

#include "HostStack.h"

/* 定义CBI复位命令数据结构 */
const uint8 Command_Block_Rest[12] = {  0x1d,0x04,0xff,0xff,
									   0xff,0xff,0xff,0xff,
									   0xff,0xff,0xff,0xff }; 
uint8 CBI_CommandBlockReset(MassStorageClass * MSC_ptr)
{
	TR_With_RBC tr_with_rbc_ptr;
	endpoint_info * epi_ptr;

	tr_with_rbc_ptr.DataTransferLength = 0;
	//tr_with_rbc_ptr.Data_BuffPtr = 
	tr_with_rbc_ptr.MSC = MSC_ptr;
	tr_with_rbc_ptr.RBC_BuffPtr = (uint8 *)Command_Block_Rest;
	tr_with_rbc_ptr.TrDirection = NONE_DATA;

	epi_ptr = MSC_ptr->tr_bulk_in_ptr->epi_ptr;
	if(ClearEndpointSTALL(MSC_ptr->dvi_ptr, epi_ptr) == FALSE)
		return FALSE;
	epi_ptr = MSC_ptr->tr_bulk_in_ptr->epi_ptr;
	if(ClearEndpointSTALL(MSC_ptr->dvi_ptr, epi_ptr) == FALSE)
		return FALSE;
		
	if(COMMAND_PASSED == CBIOnlyComHandle( &tr_with_rbc_ptr ));
	{
		return TRUE;
	}
	return FALSE;
}
/* 定义CBI命令请求数据结构 */
const USB_Device_Request  COMMAND_REQ = {0x21,0x00,0x0000,0x0000,0x000c};
//**********************************************************************************************
// 函数名称：CBI_OnlyTransport
// 输入参数：tr_with_rbc_ptr，
// 输出参数：COMMAND_PASSED，命令完成
//				    COMMAND_FAILED，命令失败
//				    PHASE_ERROR，相位出错
//   				    PERSISTENT_FAILURE，严重出错
// 功能描述：CBI传输协议命令块传输及处理
//**********************************************************************************************
uint8 CBIOnlyComHandle( TR_With_RBC *tr_with_rbc_ptr)
{
	USB_Device_Request  command_req;
	device_instance * dvi_ptr;
	uint8 Status[2];
	uint16 tr_size;
	uint16 ComCode;

	dvi_ptr = tr_with_rbc_ptr->MSC->dvi_ptr;
	if(dvi_ptr==NULL)
		return PERSISTENT_FAILURE;
	command_req.bmRequestType = 0x21;
	command_req.bRequest = 0x00;
	command_req.wValue = 0x0000;
	command_req.wIndex = 0x0000;
	command_req.wLength = 0x000c;
	/* 控制传输 */
	ComCode = control_transfer( &command_req, dvi_ptr, tr_with_rbc_ptr->RBC_BuffPtr);
	if((ComCode & 0xf) == CompletionCode_Stall)
		return COMMAND_FAILED;
	if(ComCode)
		return  PERSISTENT_FAILURE;

	/* 批量传输 */
	if(tr_with_rbc_ptr->TrDirection== IN_DATA)
	{
		ComCode = bulk_transaction(	DirectionPID_IN, 
									tr_with_rbc_ptr->Data_BuffPtr, 
									&tr_with_rbc_ptr->DataTransferLength, 
									tr_with_rbc_ptr->MSC->tr_bulk_in_ptr);
		if( (ComCode & 0xf) == CompletionCode_Stall)
		{	if(FALSE == ClearEndpointSTALL( dvi_ptr,  
				     tr_with_rbc_ptr->MSC->tr_bulk_in_ptr->epi_ptr))	// 清批量输出停止状态
			return  PERSISTENT_FAILURE;
		}
	}
	
	if(tr_with_rbc_ptr->TrDirection == OUT_DATA)
	{
		ComCode = bulk_transaction(	DirectionPID_OUT, 
									tr_with_rbc_ptr->Data_BuffPtr, 
									&tr_with_rbc_ptr->DataTransferLength, 
									tr_with_rbc_ptr->MSC->tr_bulk_out_ptr);
		if( (ComCode & 0xf) == CompletionCode_Stall)
		{	if(FALSE == ClearEndpointSTALL( dvi_ptr,  
				     tr_with_rbc_ptr->MSC->tr_bulk_out_ptr->epi_ptr))	// 清批量输出停止状态
			return  PERSISTENT_FAILURE;
		}
	}
	
	/* 中断传输 */
	tr_size = 2;
	ComCode = interrupt_transaction( IN_DATA, Status,  &tr_size, 
					       			tr_with_rbc_ptr->MSC->tr_int_in_ptr);
	if(ComCode)
		return  PERSISTENT_FAILURE;
	
	if( 0 == Status[0] )				/* 如果中断端点返回的第一个字节不为0，则指令出错 */
		return Status[1];
	else
		return COMMAND_FAILED;
}