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/*
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"
/* Table of masks for SPI_Init() from a given PARAM_SCK_DURATION value */
static const uint8_t SPIMaskFromSCKDuration[MAX_SPI_SETTINGS] =
{
#if (F_CPU == 8000000)
SPI_SPEED_FCPU_DIV_2,
#endif
SPI_SPEED_FCPU_DIV_2, SPI_SPEED_FCPU_DIV_4, SPI_SPEED_FCPU_DIV_8,
SPI_SPEED_FCPU_DIV_16, SPI_SPEED_FCPU_DIV_32, SPI_SPEED_FCPU_DIV_64
#if (F_CPU == 16000000)
, SPI_SPEED_FCPU_DIV_128
#endif
};
static void V2Protocol_ReconfigureSPI(void)
{
uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
if (SCKDuration >= MAX_SPI_SETTINGS)
SCKDuration = (MAX_SPI_SETTINGS - 1);
SPI_Init(SPIMaskFromSCKDuration[SCKDuration], true);
}
static void V2Protocol_ChangeTargetResetLine(bool ResetTarget)
{
if (ResetTarget)
{
RESET_LINE_DDR |= RESET_LINE_MASK;
if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))
RESET_LINE_PORT |= RESET_LINE_MASK;
}
else
{
RESET_LINE_PORT &= ~RESET_LINE_MASK;
RESET_LINE_DDR &= ~RESET_LINE_MASK;
}
}
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_SPI_MULTI:
V2Protocol_Command_SPIMulti();
break;
default:
V2Protocol_Command_Unknown(V2Command);
break;
}
printf("COMMAND 0x%02x\r\n", V2Command);
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_WaitUntilReady();
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_WaitUntilReady();
V2Protocol_ReconfigureSPI();
Endpoint_Write_Byte(CMD_SIGN_ON);
Endpoint_Write_Byte(STATUS_CMD_OK);
Endpoint_Write_Byte(PROGRAMMER_ID_LEN);
Endpoint_Write_Stream_LE(PROGRAMMER_ID, PROGRAMMER_ID_LEN);
Endpoint_ClearIN();
}
static void V2Protocol_Command_GetSetParam(uint8_t V2Command)
{
uint8_t ParamID = Endpoint_Read_Byte();
uint8_t ParamValue = Endpoint_Read_Byte();
Endpoint_ClearOUT();
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
Endpoint_WaitUntilReady();
uint8_t ParamPrivs = V2Params_GetParameterPrivellages(ParamID);
Endpoint_Write_Byte(V2Command);
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_SPIMulti(void)
{
uint8_t TxBytes = Endpoint_Read_Byte();
uint8_t RxBytes = Endpoint_Read_Byte();
uint8_t RxStartAddr = Endpoint_Read_Byte();
uint8_t TxData[255];
Endpoint_Read_Stream_LE(TxData, TxBytes);
Endpoint_ClearOUT();
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
Endpoint_WaitUntilReady();
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 < RxStartAddr)
{
if (CurrTxPos < TxBytes)
SPI_SendByte(TxData[CurrTxPos]);
else
SPI_SendByte(0);
CurrTxPos++;
}
/* Transmit remaining bytes with padding as needed, read in response bytes */
while (CurrRxPos < RxBytes)
{
if (CurrTxPos < TxBytes)
Endpoint_Write_Byte(SPI_TransferByte(TxData[CurrTxPos++]));
else
Endpoint_Write_Byte(SPI_ReceiveByte());
CurrRxPos++;
}
Endpoint_Write_Byte(STATUS_CMD_OK);
Endpoint_ClearIN();
}
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