You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
565 lines
16 KiB
565 lines
16 KiB
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2009.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.fourwalledcubicle.com
|
|
*/
|
|
|
|
/*
|
|
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, and distribute this software
|
|
and its documentation for any purpose and without fee is hereby
|
|
granted, 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.
|
|
*/
|
|
|
|
/** \file
|
|
*
|
|
* V2Protocol handler, to process V2 Protocol commands used in Atmel programmer devices.
|
|
*/
|
|
|
|
#define INCLUDE_FROM_V2PROTOCOL_C
|
|
#include "V2Protocol.h"
|
|
|
|
void V2Protocol_ProcessCommand(void)
|
|
{
|
|
uint8_t V2Command = Endpoint_Read_Byte();
|
|
|
|
switch (V2Command)
|
|
{
|
|
case CMD_SIGN_ON:
|
|
V2Protocol_Command_SignOn();
|
|
break;
|
|
case CMD_SET_PARAMETER:
|
|
case CMD_GET_PARAMETER:
|
|
V2Protocol_Command_GetSetParam(V2Command);
|
|
break;
|
|
case CMD_LOAD_ADDRESS:
|
|
V2Protocol_Command_LoadAddress();
|
|
break;
|
|
case CMD_RESET_PROTECTION:
|
|
V2Protocol_Command_ResetProtection();
|
|
break;
|
|
case CMD_ENTER_PROGMODE_ISP:
|
|
V2Protocol_Command_EnterISPMode();
|
|
break;
|
|
case CMD_LEAVE_PROGMODE_ISP:
|
|
V2Protocol_Command_LeaveISPMode();
|
|
break;
|
|
case CMD_PROGRAM_FLASH_ISP:
|
|
case CMD_PROGRAM_EEPROM_ISP:
|
|
V2Protocol_Command_ProgramMemory(V2Command);
|
|
break;
|
|
case CMD_READ_FLASH_ISP:
|
|
case CMD_READ_EEPROM_ISP:
|
|
V2Protocol_Command_ReadMemory(V2Command);
|
|
break;
|
|
case CMD_CHIP_ERASE_ISP:
|
|
V2Protocol_Command_ChipErase();
|
|
break;
|
|
case CMD_READ_FUSE_ISP:
|
|
case CMD_READ_LOCK_ISP:
|
|
case CMD_READ_SIGNATURE_ISP:
|
|
case CMD_READ_OSCCAL_ISP:
|
|
V2Protocol_Command_ReadFuseLockSigOSCCAL(V2Command);
|
|
break;
|
|
case CMD_PROGRAM_FUSE_ISP:
|
|
case CMD_PROGRAM_LOCK_ISP:
|
|
V2Protocol_Command_WriteFuseLock(V2Command);
|
|
break;
|
|
case CMD_SPI_MULTI:
|
|
V2Protocol_Command_SPIMulti();
|
|
break;
|
|
default:
|
|
V2Protocol_Command_Unknown(V2Command);
|
|
break;
|
|
}
|
|
|
|
Endpoint_WaitUntilReady();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_OUT);
|
|
}
|
|
|
|
static void V2Protocol_Command_Unknown(uint8_t V2Command)
|
|
{
|
|
/* Discard all incomming data */
|
|
while (Endpoint_BytesInEndpoint() == AVRISP_DATA_EPSIZE)
|
|
{
|
|
Endpoint_ClearOUT();
|
|
Endpoint_WaitUntilReady();
|
|
}
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
Endpoint_Write_Byte(STATUS_CMD_UNKNOWN);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_SignOn(void)
|
|
{
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(CMD_SIGN_ON);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_Write_Byte(sizeof(PROGRAMMER_ID) - 1);
|
|
Endpoint_Write_Stream_LE(PROGRAMMER_ID, (sizeof(PROGRAMMER_ID) - 1));
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_GetSetParam(uint8_t V2Command)
|
|
{
|
|
uint8_t ParamID = Endpoint_Read_Byte();
|
|
uint8_t ParamValue;
|
|
|
|
if (V2Command == CMD_SET_PARAMETER)
|
|
ParamValue = Endpoint_Read_Byte();
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
|
|
uint8_t ParamPrivs = V2Params_GetParameterPrivellages(ParamID);
|
|
|
|
if ((V2Command == CMD_SET_PARAMETER) && (ParamPrivs & PARAM_PRIV_WRITE))
|
|
{
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
V2Params_SetParameterValue(ParamID, ParamValue);
|
|
}
|
|
else if ((V2Command == CMD_GET_PARAMETER) && (ParamPrivs & PARAM_PRIV_READ))
|
|
{
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_Write_Byte(V2Params_GetParameterValue(ParamID));
|
|
}
|
|
else
|
|
{
|
|
Endpoint_Write_Byte(STATUS_CMD_FAILED);
|
|
}
|
|
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_LoadAddress(void)
|
|
{
|
|
Endpoint_Read_Stream_BE(&CurrentAddress, sizeof(CurrentAddress));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
if (CurrentAddress & (1UL << 31))
|
|
V2Protocol_LoadExtendedAddress();
|
|
|
|
Endpoint_Write_Byte(CMD_LOAD_ADDRESS);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_ResetProtection(void)
|
|
{
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(CMD_RESET_PROTECTION);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_EnterISPMode(void)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t TimeoutMS;
|
|
uint8_t PinStabDelayMS;
|
|
uint8_t ExecutionDelayMS;
|
|
uint8_t SynchLoops;
|
|
uint8_t ByteDelay;
|
|
uint8_t PollValue;
|
|
uint8_t PollIndex;
|
|
uint8_t EnterProgBytes[4];
|
|
} Enter_ISP_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Enter_ISP_Params, sizeof(Enter_ISP_Params));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
uint8_t ResponseStatus = STATUS_CMD_FAILED;
|
|
|
|
CurrentAddress = 0;
|
|
|
|
V2Protocol_DelayMS(Enter_ISP_Params.ExecutionDelayMS);
|
|
SPI_Init(V2Protocol_GetSPIPrescalerMask() | SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_MODE_MASTER);
|
|
|
|
while (Enter_ISP_Params.SynchLoops-- && (ResponseStatus == STATUS_CMD_FAILED))
|
|
{
|
|
uint8_t ResponseBytes[4];
|
|
|
|
V2Protocol_ChangeTargetResetLine(true);
|
|
V2Protocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
|
|
|
|
for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
|
|
{
|
|
V2Protocol_DelayMS(Enter_ISP_Params.ByteDelay);
|
|
ResponseBytes[RByte] = SPI_TransferByte(Enter_ISP_Params.EnterProgBytes[RByte]);
|
|
}
|
|
|
|
/* Check if polling disabled, or if the polled value matches the expected value */
|
|
if (!(Enter_ISP_Params.PollIndex) || (ResponseBytes[Enter_ISP_Params.PollIndex - 1] == Enter_ISP_Params.PollValue))
|
|
{
|
|
ResponseStatus = STATUS_CMD_OK;
|
|
}
|
|
else
|
|
{
|
|
V2Protocol_ChangeTargetResetLine(false);
|
|
V2Protocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
|
|
}
|
|
}
|
|
|
|
Endpoint_Write_Byte(CMD_ENTER_PROGMODE_ISP);
|
|
Endpoint_Write_Byte(ResponseStatus);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_LeaveISPMode(void)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t PreDelayMS;
|
|
uint8_t PostDelayMS;
|
|
} Leave_ISP_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Leave_ISP_Params, sizeof(Leave_ISP_Params));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
V2Protocol_DelayMS(Leave_ISP_Params.PreDelayMS);
|
|
V2Protocol_ChangeTargetResetLine(false);
|
|
SPI_ShutDown();
|
|
V2Protocol_DelayMS(Leave_ISP_Params.PostDelayMS);
|
|
|
|
Endpoint_Write_Byte(CMD_LEAVE_PROGMODE_ISP);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_ProgramMemory(uint8_t V2Command)
|
|
{
|
|
struct
|
|
{
|
|
uint16_t BytesToWrite;
|
|
uint8_t ProgrammingMode;
|
|
uint8_t DelayMS;
|
|
uint8_t ProgrammingCommands[3];
|
|
uint8_t PollValue1;
|
|
uint8_t PollValue2;
|
|
} Write_Memory_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Write_Memory_Params, sizeof(Write_Memory_Params));
|
|
Write_Memory_Params.BytesToWrite = SwapEndian_16(Write_Memory_Params.BytesToWrite);
|
|
|
|
uint8_t ProgrammingStatus = STATUS_CMD_OK;
|
|
uint16_t PollAddress = 0;
|
|
uint8_t PollValue = (V2Command == CMD_PROGRAM_FLASH_ISP) ? Write_Memory_Params.PollValue1 :
|
|
Write_Memory_Params.PollValue2;
|
|
|
|
if (Write_Memory_Params.ProgrammingMode & PROG_MODE_PAGED_WRITES_MASK)
|
|
{
|
|
uint16_t StartAddress = (CurrentAddress & 0xFFFF);
|
|
|
|
/* Paged mode memory programming */
|
|
for (uint16_t CurrentByte = 0; CurrentByte < Write_Memory_Params.BytesToWrite; CurrentByte++)
|
|
{
|
|
bool IsOddByte = (CurrentByte & 0x01);
|
|
uint8_t ByteToWrite = Endpoint_Read_Byte();
|
|
|
|
if (IsOddByte && (V2Command == CMD_PROGRAM_FLASH_ISP))
|
|
Write_Memory_Params.ProgrammingCommands[0] ^= READ_WRITE_HIGH_BYTE_MASK;
|
|
|
|
SPI_SendByte(Write_Memory_Params.ProgrammingCommands[0]);
|
|
SPI_SendByte(CurrentAddress >> 8);
|
|
SPI_SendByte(CurrentAddress & 0xFF);
|
|
SPI_SendByte(ByteToWrite);
|
|
|
|
if (!(PollAddress) && (ByteToWrite != PollValue))
|
|
{
|
|
if (IsOddByte && (V2Command == CMD_PROGRAM_FLASH_ISP))
|
|
Write_Memory_Params.ProgrammingCommands[2] |= READ_WRITE_HIGH_BYTE_MASK;
|
|
|
|
PollAddress = (CurrentAddress & 0xFFFF);
|
|
}
|
|
|
|
/* Check if the endpoint bank is currently empty */
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
|
{
|
|
Endpoint_ClearOUT();
|
|
Endpoint_WaitUntilReady();
|
|
}
|
|
|
|
if (IsOddByte || (V2Command == CMD_PROGRAM_EEPROM_ISP))
|
|
CurrentAddress++;
|
|
}
|
|
|
|
/* If the current page must be committed, send the PROGRAM PAGE command to the target */
|
|
if (Write_Memory_Params.ProgrammingMode & PROG_MODE_COMMIT_PAGE_MASK)
|
|
{
|
|
SPI_SendByte(Write_Memory_Params.ProgrammingCommands[1]);
|
|
SPI_SendByte(StartAddress >> 8);
|
|
SPI_SendByte(StartAddress & 0xFF);
|
|
SPI_SendByte(0x00);
|
|
|
|
/* Check if polling is possible, if not switch to timed delay mode */
|
|
if (!(PollAddress))
|
|
{
|
|
Write_Memory_Params.ProgrammingMode &= ~PROG_MODE_PAGED_VALUE_MASK;
|
|
Write_Memory_Params.ProgrammingMode &= ~PROG_MODE_PAGED_TIMEDELAY_MASK;
|
|
}
|
|
|
|
ProgrammingStatus = V2Protocol_WaitForProgComplete(Write_Memory_Params.ProgrammingMode, PollAddress, PollValue,
|
|
Write_Memory_Params.DelayMS, Write_Memory_Params.ProgrammingCommands[2]);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Word/byte mode memory programming */
|
|
for (uint16_t CurrentByte = 0; CurrentByte < Write_Memory_Params.BytesToWrite; CurrentByte++)
|
|
{
|
|
bool IsOddByte = (CurrentByte & 0x01);
|
|
uint8_t ByteToWrite = Endpoint_Read_Byte();
|
|
|
|
if (IsOddByte && (V2Command == CMD_READ_FLASH_ISP))
|
|
Write_Memory_Params.ProgrammingCommands[0] ^= READ_WRITE_HIGH_BYTE_MASK;
|
|
|
|
SPI_SendByte(Write_Memory_Params.ProgrammingCommands[0]);
|
|
SPI_SendByte(CurrentAddress >> 8);
|
|
SPI_SendByte(CurrentAddress & 0xFF);
|
|
SPI_SendByte(ByteToWrite);
|
|
|
|
if (ByteToWrite != PollValue)
|
|
{
|
|
if (IsOddByte && (V2Command == CMD_PROGRAM_FLASH_ISP))
|
|
Write_Memory_Params.ProgrammingCommands[2] |= READ_WRITE_HIGH_BYTE_MASK;
|
|
|
|
PollAddress = (CurrentAddress & 0xFFFF);
|
|
}
|
|
|
|
/* Check if the endpoint bank is currently empty */
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
|
{
|
|
Endpoint_ClearOUT();
|
|
Endpoint_WaitUntilReady();
|
|
}
|
|
|
|
if (IsOddByte || (V2Command == CMD_PROGRAM_EEPROM_ISP))
|
|
CurrentAddress++;
|
|
|
|
ProgrammingStatus = V2Protocol_WaitForProgComplete(Write_Memory_Params.ProgrammingMode, PollAddress, PollValue,
|
|
Write_Memory_Params.DelayMS, Write_Memory_Params.ProgrammingCommands[2]);
|
|
|
|
if (ProgrammingStatus != STATUS_CMD_OK)
|
|
break;
|
|
}
|
|
}
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
Endpoint_Write_Byte(ProgrammingStatus);
|
|
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_ReadMemory(uint8_t V2Command)
|
|
{
|
|
struct
|
|
{
|
|
uint16_t BytesToRead;
|
|
uint8_t ReadMemoryCommand;
|
|
} Read_Memory_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Read_Memory_Params, sizeof(Read_Memory_Params));
|
|
Read_Memory_Params.BytesToRead = SwapEndian_16(Read_Memory_Params.BytesToRead);
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
|
|
for (uint16_t CurrentByte = 0; CurrentByte < Read_Memory_Params.BytesToRead; CurrentByte++)
|
|
{
|
|
if ((V2Command == CMD_READ_FLASH_ISP) && (CurrentByte & 0x01))
|
|
Read_Memory_Params.ReadMemoryCommand ^= READ_WRITE_HIGH_BYTE_MASK;
|
|
|
|
SPI_SendByte(Read_Memory_Params.ReadMemoryCommand);
|
|
SPI_SendByte(CurrentAddress >> 8);
|
|
SPI_SendByte(CurrentAddress & 0xFF);
|
|
Endpoint_Write_Byte(SPI_ReceiveByte());
|
|
|
|
/* Check if the endpoint bank is currently full */
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
|
{
|
|
Endpoint_ClearIN();
|
|
Endpoint_WaitUntilReady();
|
|
}
|
|
|
|
if (((V2Command == CMD_READ_FLASH_ISP) && (CurrentByte & 0x01)) || (V2Command == CMD_READ_EEPROM_ISP))
|
|
CurrentAddress++;
|
|
}
|
|
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
|
|
bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
|
|
Endpoint_ClearIN();
|
|
|
|
/* Ensure last packet is a short packet to terminate the transfer */
|
|
if (IsEndpointFull)
|
|
{
|
|
Endpoint_WaitUntilReady();
|
|
Endpoint_ClearIN();
|
|
Endpoint_WaitUntilReady();
|
|
}
|
|
}
|
|
|
|
static void V2Protocol_Command_ChipErase(void)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t EraseDelayMS;
|
|
uint8_t PollMethod;
|
|
uint8_t EraseCommandBytes[4];
|
|
} Erase_Chip_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Erase_Chip_Params, sizeof(Erase_Chip_Params));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
uint8_t ResponseStatus = STATUS_CMD_OK;
|
|
|
|
for (uint8_t SByte = 0; SByte < sizeof(Erase_Chip_Params.EraseCommandBytes); SByte++)
|
|
SPI_SendByte(Erase_Chip_Params.EraseCommandBytes[SByte]);
|
|
|
|
if (!(Erase_Chip_Params.PollMethod))
|
|
V2Protocol_DelayMS(Erase_Chip_Params.EraseDelayMS);
|
|
else
|
|
ResponseStatus = V2Protocol_WaitWhileTargetBusy();
|
|
|
|
Endpoint_Write_Byte(CMD_CHIP_ERASE_ISP);
|
|
Endpoint_Write_Byte(ResponseStatus);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_ReadFuseLockSigOSCCAL(uint8_t V2Command)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t RetByte;
|
|
uint8_t ReadCommandBytes[4];
|
|
} Read_FuseLockSigOSCCAL_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Read_FuseLockSigOSCCAL_Params, sizeof(Read_FuseLockSigOSCCAL_Params));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
uint8_t ResponseBytes[4];
|
|
|
|
for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
|
|
ResponseBytes[RByte] = SPI_TransferByte(Read_FuseLockSigOSCCAL_Params.ReadCommandBytes[RByte]);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_Write_Byte(ResponseBytes[Read_FuseLockSigOSCCAL_Params.RetByte - 1]);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_WriteFuseLock(uint8_t V2Command)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t WriteCommandBytes[4];
|
|
} Write_FuseLockSig_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&Write_FuseLockSig_Params, sizeof(Write_FuseLockSig_Params));
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
for (uint8_t SByte = 0; SByte < sizeof(Write_FuseLockSig_Params.WriteCommandBytes); SByte++)
|
|
SPI_SendByte(Write_FuseLockSig_Params.WriteCommandBytes[SByte]);
|
|
|
|
Endpoint_Write_Byte(V2Command);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|
|
|
|
static void V2Protocol_Command_SPIMulti(void)
|
|
{
|
|
struct
|
|
{
|
|
uint8_t TxBytes;
|
|
uint8_t RxBytes;
|
|
uint8_t RxStartAddr;
|
|
uint8_t TxData[255];
|
|
} SPI_Multi_Params;
|
|
|
|
Endpoint_Read_Stream_LE(&SPI_Multi_Params, sizeof(SPI_Multi_Params) -
|
|
sizeof(SPI_Multi_Params.TxData));
|
|
Endpoint_Read_Stream_LE(&SPI_Multi_Params.TxData, SPI_Multi_Params.TxBytes);
|
|
|
|
Endpoint_ClearOUT();
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
|
|
|
Endpoint_Write_Byte(CMD_SPI_MULTI);
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
|
|
uint8_t CurrTxPos = 0;
|
|
uint8_t CurrRxPos = 0;
|
|
|
|
/* Write out bytes to transmit until the start of the bytes to receive is met */
|
|
while (CurrTxPos < SPI_Multi_Params.RxStartAddr)
|
|
{
|
|
if (CurrTxPos < SPI_Multi_Params.TxBytes)
|
|
SPI_SendByte(SPI_Multi_Params.TxData[CurrTxPos]);
|
|
else
|
|
SPI_SendByte(0);
|
|
|
|
CurrTxPos++;
|
|
}
|
|
|
|
/* Transmit remaining bytes with padding as needed, read in response bytes */
|
|
while (CurrRxPos < SPI_Multi_Params.RxBytes)
|
|
{
|
|
if (CurrTxPos < SPI_Multi_Params.TxBytes)
|
|
Endpoint_Write_Byte(SPI_TransferByte(SPI_Multi_Params.TxData[CurrTxPos++]));
|
|
else
|
|
Endpoint_Write_Byte(SPI_ReceiveByte());
|
|
|
|
CurrRxPos++;
|
|
}
|
|
|
|
Endpoint_Write_Byte(STATUS_CMD_OK);
|
|
Endpoint_ClearIN();
|
|
}
|