protodma.c

是关于pdiusbd12完整固件程序代码

	#include <stdio.h>
	#include <string.h>

	#include <reg51.h>                /* special function register declarations   */
	#include "epphal.h"

	#include "d12ci.h"
	#include "mainloop.h"
	#include "usb100.h"
	#include "chap_9.h"

	extern CONTROL_XFER ControlData;
	extern IO_REQUEST idata ioRequest;
	extern EPPFLAGS bEPPflags;
	extern BOOL bNoRAM;
	extern unsigned char idata EpBuf[EP2_PACKET_SIZE];

	//获取固件版本号
	void get_firmware_version()
	{
		unsigned char i;

		i = 0x30; // firmware version number
		single_transmit((unsigned char *)&i, 1);
	}

	//获取端点2缓存区大小
	void get_buffer_size()
	{
		unsigned char i[4];

		if(bNoRAM == TRUE) {
			i[0] = EP2_PACKET_SIZE;
			i[1] = 0;
			i[2] = 0;
			i[3] = 0;
		} else {
			i[0] = 0;
			i[1] = 1;
			i[2] = 0;
			i[3] = 0;
		}
		single_transmit((unsigned char *)&i, 4);
	}

	//DMA请求响应子程序
	void setup_dma_request()
	{
		memcpy((unsigned char *)&ioRequest + ControlData.DeviceRequest.wValue,
			ControlData.dataBuffer,
			ControlData.DeviceRequest.wLength);

		ioRequest.uSize = SWAP(ioRequest.uSize);
		ioRequest.uAddressL = SWAP(ioRequest.uAddressL);

		if(ioRequest.uSize > DMA_BUFFER_SIZE) { // Unaccepted request
			stall_ep0();//DMA设置出错
		}
		else if(bNoRAM == TRUE && ioRequest.uSize > EP2_PACKET_SIZE) {
			stall_ep0();//DMA缓冲区出错
		}
		else {
			if(bEPPflags.bits.dma_state == DMA_IDLE) {
				DISABLE;
				bEPPflags.bits.setup_dma ++;
				ENABLE;
			}
			else {
				DISABLE;
				bEPPflags.bits.dma_state = DMA_PENDING;
				ENABLE;
			}

		} // else if accepted request
	}

	//厂商请求处理
	void read_write_register(void)
	{
		unsigned char i,len,epstatus;

		if(ControlData.DeviceRequest.bmRequestType & (unsigned char)USB_ENDPOINT_DIRECTION_MASK) {

			if(bEPPflags.bits.verbose)
				printf("Read Registers: Offset = 0x%x, Length = 0x%x, Index = 0x%x.\n",
					ControlData.DeviceRequest.wValue,
					ControlData.DeviceRequest.wLength,
					ControlData.DeviceRequest.wIndex);

			if(ControlData.DeviceRequest.wIndex == GET_FIRMWARE_VERSION &&
				ControlData.DeviceRequest.wValue == 0 &&
				ControlData.DeviceRequest.wLength == 1)
				get_firmware_version();//获取固件版本号
			else
			if(ControlData.DeviceRequest.wIndex == GET_BUFFER_SIZE &&
				ControlData.DeviceRequest.wValue == 0 &&
				ControlData.DeviceRequest.wLength == 4)
				get_buffer_size();//获取缓冲区大小
			else
				stall_ep0();

		}	// if read register
		else{
			if(bEPPflags.bits.verbose) {

				printf("Write Registers: Offset = 0x%x, Length = 0x%x, Index = 0x%x.\n",
					ControlData.DeviceRequest.wValue,
					ControlData.DeviceRequest.wLength,
					ControlData.DeviceRequest.wIndex);

				printf("Data: ");
				for(i = 0; i < ControlData.DeviceRequest.wLength; i ++)
					printf("0x%bx, ", *((ControlData.dataBuffer)+i));
				printf("\n");
			}

			if(ControlData.DeviceRequest.wIndex == SETUP_DMA_REQUEST &&
				ControlData.DeviceRequest.wValue == 0 &&
				ControlData.DeviceRequest.wLength == 6)
		   		{
					if(ControlData.dataBuffer[5]==0x81)
					{
						D12_WriteEndpoint(5, ControlData.dataBuffer[3], EpBuf);//发送数据
					}
					if(ControlData.dataBuffer[5]==0x80)
					{
						epstatus=D12_ReadEndpointStatus(4);
						epstatus &= 0x60;
						if (epstatus == 0x60)
							len = D12_ReadEndpoint(4, 64, EpBuf);//读取双缓冲区数据
 					}
					single_transmit(0, 0);
					//setup_dma_request();//DMA设置处理,因为未使用DMA所以屏蔽掉
				}				
			else
				stall_ep0();
		}	// if write register
	}