?? protodma.c
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#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];
//獲取固件版本號
void get_firmware_version()
{
unsigned char i;
i = 0x30; // firmware version number
single_transmit((unsigned char *)&i, 1);
}
//獲取端點2緩存區大小
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請求響應子程序
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設置出錯
}
else if(bNoRAM == TRUE && ioRequest.uSize > EP2_PACKET_SIZE) {
stall_ep0();//DMA緩沖區出錯
}
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
}
//廠商請求處理
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();//獲取固件版本號
else
if(ControlData.DeviceRequest.wIndex == GET_BUFFER_SIZE &&
ControlData.DeviceRequest.wValue == 0 &&
ControlData.DeviceRequest.wLength == 4)
get_buffer_size();//獲取緩沖區大小
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);//發送數據
}
if(ControlData.dataBuffer[5]==0x80)
{
epstatus=D12_ReadEndpointStatus(4);
epstatus &= 0x60;
if (epstatus == 0x60)
len = D12_ReadEndpoint(4, 64, EpBuf);//讀取雙緩沖區數據
}
single_transmit(0, 0);
//setup_dma_request();//DMA設置處理,因為未使用DMA所以屏蔽掉
}
else
stall_ep0();
} // if write register
}
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