mirror of
https://github.com/dougg3/mac-rom-simm-programmer.git
synced 2024-06-12 11:29:35 +00:00
7425af761a
This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
366 lines
11 KiB
C
366 lines
11 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2012.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaim all warranties with regard to this
|
|
software, including all implied warranties of merchantability
|
|
and fitness. In no event shall the author be liable for any
|
|
special, indirect or consequential damages or any damages
|
|
whatsoever resulting from loss of use, data or profits, whether
|
|
in an action of contract, negligence or other tortious action,
|
|
arising out of or in connection with the use or performance of
|
|
this software.
|
|
*/
|
|
|
|
#define __INCLUDE_FROM_USB_DRIVER
|
|
#include "../../Core/USBMode.h"
|
|
|
|
#if defined(USB_CAN_BE_DEVICE)
|
|
|
|
#define __INCLUDE_FROM_CDC_DRIVER
|
|
#define __INCLUDE_FROM_CDC_DEVICE_C
|
|
#include "CDCClassDevice.h"
|
|
|
|
void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if (!(Endpoint_IsSETUPReceived()))
|
|
return;
|
|
|
|
if (USB_ControlRequest.wIndex != CDCInterfaceInfo->Config.ControlInterfaceNumber)
|
|
return;
|
|
|
|
switch (USB_ControlRequest.bRequest)
|
|
{
|
|
case CDC_REQ_GetLineEncoding:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
while (!(Endpoint_IsINReady()));
|
|
|
|
Endpoint_Write_32_LE(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
|
|
Endpoint_Write_8(CDCInterfaceInfo->State.LineEncoding.CharFormat);
|
|
Endpoint_Write_8(CDCInterfaceInfo->State.LineEncoding.ParityType);
|
|
Endpoint_Write_8(CDCInterfaceInfo->State.LineEncoding.DataBits);
|
|
|
|
Endpoint_ClearIN();
|
|
Endpoint_ClearStatusStage();
|
|
}
|
|
|
|
break;
|
|
case CDC_REQ_SetLineEncoding:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
|
|
while (!(Endpoint_IsOUTReceived()))
|
|
{
|
|
if (USB_DeviceState == DEVICE_STATE_Unattached)
|
|
return;
|
|
}
|
|
|
|
CDCInterfaceInfo->State.LineEncoding.BaudRateBPS = Endpoint_Read_32_LE();
|
|
CDCInterfaceInfo->State.LineEncoding.CharFormat = Endpoint_Read_8();
|
|
CDCInterfaceInfo->State.LineEncoding.ParityType = Endpoint_Read_8();
|
|
CDCInterfaceInfo->State.LineEncoding.DataBits = Endpoint_Read_8();
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_ClearStatusStage();
|
|
|
|
EVENT_CDC_Device_LineEncodingChanged(CDCInterfaceInfo);
|
|
}
|
|
|
|
break;
|
|
case CDC_REQ_SetControlLineState:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
Endpoint_ClearStatusStage();
|
|
|
|
CDCInterfaceInfo->State.ControlLineStates.HostToDevice = USB_ControlRequest.wValue;
|
|
|
|
EVENT_CDC_Device_ControLineStateChanged(CDCInterfaceInfo);
|
|
}
|
|
|
|
break;
|
|
case CDC_REQ_SendBreak:
|
|
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
|
|
{
|
|
Endpoint_ClearSETUP();
|
|
Endpoint_ClearStatusStage();
|
|
|
|
EVENT_CDC_Device_BreakSent(CDCInterfaceInfo, (uint8_t)USB_ControlRequest.wValue);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
memset(&CDCInterfaceInfo->State, 0x00, sizeof(CDCInterfaceInfo->State));
|
|
|
|
for (uint8_t EndpointNum = 1; EndpointNum < ENDPOINT_TOTAL_ENDPOINTS; EndpointNum++)
|
|
{
|
|
uint16_t Size;
|
|
uint8_t Type;
|
|
uint8_t Direction;
|
|
bool DoubleBanked;
|
|
|
|
if (EndpointNum == CDCInterfaceInfo->Config.DataINEndpointNumber)
|
|
{
|
|
Size = CDCInterfaceInfo->Config.DataINEndpointSize;
|
|
Direction = ENDPOINT_DIR_IN;
|
|
Type = EP_TYPE_BULK;
|
|
DoubleBanked = CDCInterfaceInfo->Config.DataINEndpointDoubleBank;
|
|
}
|
|
else if (EndpointNum == CDCInterfaceInfo->Config.DataOUTEndpointNumber)
|
|
{
|
|
Size = CDCInterfaceInfo->Config.DataOUTEndpointSize;
|
|
Direction = ENDPOINT_DIR_OUT;
|
|
Type = EP_TYPE_BULK;
|
|
DoubleBanked = CDCInterfaceInfo->Config.DataOUTEndpointDoubleBank;
|
|
}
|
|
else if (EndpointNum == CDCInterfaceInfo->Config.NotificationEndpointNumber)
|
|
{
|
|
Size = CDCInterfaceInfo->Config.NotificationEndpointSize;
|
|
Direction = ENDPOINT_DIR_IN;
|
|
Type = EP_TYPE_INTERRUPT;
|
|
DoubleBanked = CDCInterfaceInfo->Config.NotificationEndpointDoubleBank;
|
|
}
|
|
else
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (!(Endpoint_ConfigureEndpoint(EndpointNum, Type, Direction, Size,
|
|
DoubleBanked ? ENDPOINT_BANK_DOUBLE : ENDPOINT_BANK_SINGLE)))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return;
|
|
|
|
#if !defined(NO_CLASS_DRIVER_AUTOFLUSH)
|
|
CDC_Device_Flush(CDCInterfaceInfo);
|
|
#endif
|
|
}
|
|
|
|
uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
|
|
const char* const String)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return ENDPOINT_RWSTREAM_DeviceDisconnected;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
|
|
return Endpoint_Write_Stream_LE(String, strlen(String), NULL);
|
|
}
|
|
|
|
uint8_t CDC_Device_SendData(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
|
|
const char* const Buffer,
|
|
const uint16_t Length)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return ENDPOINT_RWSTREAM_DeviceDisconnected;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
|
|
return Endpoint_Write_Stream_LE(Buffer, Length, NULL);
|
|
}
|
|
|
|
uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
|
|
const uint8_t Data)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return ENDPOINT_RWSTREAM_DeviceDisconnected;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
|
|
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
|
{
|
|
Endpoint_ClearIN();
|
|
|
|
uint8_t ErrorCode;
|
|
|
|
if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
|
|
return ErrorCode;
|
|
}
|
|
|
|
Endpoint_Write_8(Data);
|
|
return ENDPOINT_READYWAIT_NoError;
|
|
}
|
|
|
|
uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return ENDPOINT_RWSTREAM_DeviceDisconnected;
|
|
|
|
uint8_t ErrorCode;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataINEndpointNumber);
|
|
|
|
if (!(Endpoint_BytesInEndpoint()))
|
|
return ENDPOINT_READYWAIT_NoError;
|
|
|
|
bool BankFull = !(Endpoint_IsReadWriteAllowed());
|
|
|
|
Endpoint_ClearIN();
|
|
|
|
if (BankFull)
|
|
{
|
|
if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
|
|
return ErrorCode;
|
|
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
return ENDPOINT_READYWAIT_NoError;
|
|
}
|
|
|
|
uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return 0;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
|
|
|
|
if (Endpoint_IsOUTReceived())
|
|
{
|
|
if (!(Endpoint_BytesInEndpoint()))
|
|
{
|
|
Endpoint_ClearOUT();
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return Endpoint_BytesInEndpoint();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return -1;
|
|
|
|
int16_t ReceivedByte = -1;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
|
|
|
|
if (Endpoint_IsOUTReceived())
|
|
{
|
|
if (Endpoint_BytesInEndpoint())
|
|
ReceivedByte = Endpoint_Read_8();
|
|
|
|
if (!(Endpoint_BytesInEndpoint()))
|
|
Endpoint_ClearOUT();
|
|
}
|
|
|
|
return ReceivedByte;
|
|
}
|
|
|
|
void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
|
|
{
|
|
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
|
|
return;
|
|
|
|
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.NotificationEndpointNumber);
|
|
|
|
USB_Request_Header_t Notification = (USB_Request_Header_t)
|
|
{
|
|
.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
|
|
.bRequest = CDC_NOTIF_SerialState,
|
|
.wValue = CPU_TO_LE16(0),
|
|
.wIndex = CPU_TO_LE16(0),
|
|
.wLength = CPU_TO_LE16(sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost)),
|
|
};
|
|
|
|
Endpoint_Write_Stream_LE(&Notification, sizeof(USB_Request_Header_t), NULL);
|
|
Endpoint_Write_Stream_LE(&CDCInterfaceInfo->State.ControlLineStates.DeviceToHost,
|
|
sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
|
|
NULL);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
#if defined(FDEV_SETUP_STREAM)
|
|
void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
|
|
FILE* const Stream)
|
|
{
|
|
*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar, _FDEV_SETUP_RW);
|
|
fdev_set_udata(Stream, CDCInterfaceInfo);
|
|
}
|
|
|
|
void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
|
|
FILE* const Stream)
|
|
{
|
|
*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Device_putchar, CDC_Device_getchar_Blocking, _FDEV_SETUP_RW);
|
|
fdev_set_udata(Stream, CDCInterfaceInfo);
|
|
}
|
|
|
|
static int CDC_Device_putchar(char c,
|
|
FILE* Stream)
|
|
{
|
|
return CDC_Device_SendByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream), c) ? _FDEV_ERR : 0;
|
|
}
|
|
|
|
static int CDC_Device_getchar(FILE* Stream)
|
|
{
|
|
int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
|
|
|
|
if (ReceivedByte < 0)
|
|
return _FDEV_EOF;
|
|
|
|
return ReceivedByte;
|
|
}
|
|
|
|
static int CDC_Device_getchar_Blocking(FILE* Stream)
|
|
{
|
|
int16_t ReceivedByte;
|
|
|
|
while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0)
|
|
{
|
|
if (USB_DeviceState == DEVICE_STATE_Unattached)
|
|
return _FDEV_EOF;
|
|
|
|
CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
|
|
USB_USBTask();
|
|
}
|
|
|
|
return ReceivedByte;
|
|
}
|
|
#endif
|
|
|
|
void CDC_Device_Event_Stub(void)
|
|
{
|
|
|
|
}
|
|
|
|
#endif
|
|
|