532 lines
18 KiB
C
532 lines
18 KiB
C
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2017.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaims all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* ISP Protocol handler, to process V2 Protocol wrapped ISP commands used in Atmel programmer devices.
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*/
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#include "ISPProtocol.h"
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#if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
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/** Handler for the CMD_ENTER_PROGMODE_ISP command, which attempts to enter programming mode on
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* the attached device, returning success or failure back to the host.
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*/
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void ISPProtocol_EnterISPMode(void)
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{
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struct
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{
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uint8_t TimeoutMS;
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uint8_t PinStabDelayMS;
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uint8_t ExecutionDelayMS;
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uint8_t SynchLoops;
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uint8_t ByteDelay;
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uint8_t PollValue;
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uint8_t PollIndex;
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uint8_t EnterProgBytes[4];
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} Enter_ISP_Params;
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Endpoint_Read_Stream_LE(&Enter_ISP_Params, sizeof(Enter_ISP_Params), NULL);
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Endpoint_ClearOUT();
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Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
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Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
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uint8_t ResponseStatus = STATUS_CMD_FAILED;
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CurrentAddress = 0;
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/* Perform execution delay, initialize SPI bus */
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ISPProtocol_DelayMS(Enter_ISP_Params.ExecutionDelayMS);
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ISPTarget_EnableTargetISP();
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ISPTarget_ChangeTargetResetLine(true);
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ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
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/* Continuously attempt to synchronize with the target until either the number of attempts specified
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* by the host has exceeded, or the the device sends back the expected response values */
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while (Enter_ISP_Params.SynchLoops-- && TimeoutTicksRemaining)
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{
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uint8_t ResponseBytes[4];
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for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
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{
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ISPProtocol_DelayMS(Enter_ISP_Params.ByteDelay);
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ResponseBytes[RByte] = ISPTarget_TransferByte(Enter_ISP_Params.EnterProgBytes[RByte]);
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}
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/* Check if polling disabled, or if the polled value matches the expected value */
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if (!(Enter_ISP_Params.PollIndex) || (ResponseBytes[Enter_ISP_Params.PollIndex - 1] == Enter_ISP_Params.PollValue))
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{
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ResponseStatus = STATUS_CMD_OK;
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break;
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}
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else
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{
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ISPTarget_ChangeTargetResetLine(false);
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ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
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ISPTarget_ChangeTargetResetLine(true);
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ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
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}
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}
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Endpoint_Write_8(CMD_ENTER_PROGMODE_ISP);
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Endpoint_Write_8(ResponseStatus);
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Endpoint_ClearIN();
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}
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/** Handler for the CMD_LEAVE_ISP command, which releases the target from programming mode. */
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void ISPProtocol_LeaveISPMode(void)
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{
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struct
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{
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uint8_t PreDelayMS;
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uint8_t PostDelayMS;
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} Leave_ISP_Params;
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Endpoint_Read_Stream_LE(&Leave_ISP_Params, sizeof(Leave_ISP_Params), NULL);
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Endpoint_ClearOUT();
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Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
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Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
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/* Perform pre-exit delay, release the target /RESET, disable the SPI bus and perform the post-exit delay */
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ISPProtocol_DelayMS(Leave_ISP_Params.PreDelayMS);
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ISPTarget_ChangeTargetResetLine(false);
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ISPTarget_DisableTargetISP();
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ISPProtocol_DelayMS(Leave_ISP_Params.PostDelayMS);
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Endpoint_Write_8(CMD_LEAVE_PROGMODE_ISP);
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Endpoint_Write_8(STATUS_CMD_OK);
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Endpoint_ClearIN();
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}
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/** Handler for the CMD_PROGRAM_FLASH_ISP and CMD_PROGRAM_EEPROM_ISP commands, writing out bytes,
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* words or pages of data to the attached device.
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*
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* \param[in] V2Command Issued V2 Protocol command byte from the host
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*/
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void ISPProtocol_ProgramMemory(uint8_t V2Command)
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{
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struct
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{
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uint16_t BytesToWrite;
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uint8_t ProgrammingMode;
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uint8_t DelayMS;
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uint8_t ProgrammingCommands[3];
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uint8_t PollValue1;
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uint8_t PollValue2;
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uint8_t ProgData[256]; // Note, the Jungo driver has a very short ACK timeout period, need to buffer the
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} Write_Memory_Params; // whole page and ACK the packet as fast as possible to prevent it from aborting
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Endpoint_Read_Stream_LE(&Write_Memory_Params, (sizeof(Write_Memory_Params) -
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sizeof(Write_Memory_Params.ProgData)), NULL);
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Write_Memory_Params.BytesToWrite = SwapEndian_16(Write_Memory_Params.BytesToWrite);
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if (Write_Memory_Params.BytesToWrite > sizeof(Write_Memory_Params.ProgData))
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{
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Endpoint_ClearOUT();
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Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
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Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
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Endpoint_Write_8(V2Command);
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Endpoint_Write_8(STATUS_CMD_FAILED);
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Endpoint_ClearIN();
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return;
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}
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Endpoint_Read_Stream_LE(&Write_Memory_Params.ProgData, Write_Memory_Params.BytesToWrite, NULL);
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// The driver will terminate transfers that are a round multiple of the endpoint bank in size with a ZLP, need
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// to catch this and discard it before continuing on with packet processing to prevent communication issues
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if (((sizeof(uint8_t) + sizeof(Write_Memory_Params) - sizeof(Write_Memory_Params.ProgData)) +
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Write_Memory_Params.BytesToWrite) % AVRISP_DATA_EPSIZE == 0)
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{
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Endpoint_ClearOUT();
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Endpoint_WaitUntilReady();
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}
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Endpoint_ClearOUT();
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Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
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Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
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uint8_t ProgrammingStatus = STATUS_CMD_OK;
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uint8_t PollValue = (V2Command == CMD_PROGRAM_FLASH_ISP) ? Write_Memory_Params.PollValue1 :
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Write_Memory_Params.PollValue2;
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uint16_t PollAddress = 0;
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uint8_t* NextWriteByte = Write_Memory_Params.ProgData;
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uint16_t PageStartAddress = (CurrentAddress & 0xFFFF);
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for (uint16_t CurrentByte = 0; CurrentByte < Write_Memory_Params.BytesToWrite; CurrentByte++)
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{
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uint8_t ByteToWrite = *(NextWriteByte++);
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uint8_t ProgrammingMode = Write_Memory_Params.ProgrammingMode;
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/* Check to see if we need to send a LOAD EXTENDED ADDRESS command to the target */
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if (MustLoadExtendedAddress)
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{
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ISPTarget_LoadExtendedAddress();
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MustLoadExtendedAddress = false;
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}
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ISPTarget_SendByte(Write_Memory_Params.ProgrammingCommands[0]);
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ISPTarget_SendByte(CurrentAddress >> 8);
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ISPTarget_SendByte(CurrentAddress & 0xFF);
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ISPTarget_SendByte(ByteToWrite);
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/* AVR FLASH addressing requires us to modify the write command based on if we are writing a high
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* or low byte at the current word address */
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if (V2Command == CMD_PROGRAM_FLASH_ISP)
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Write_Memory_Params.ProgrammingCommands[0] ^= READ_WRITE_HIGH_BYTE_MASK;
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/* Check to see if we have a valid polling address */
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if (!(PollAddress) && (ByteToWrite != PollValue))
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{
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if ((CurrentByte & 0x01) && (V2Command == CMD_PROGRAM_FLASH_ISP))
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Write_Memory_Params.ProgrammingCommands[2] |= READ_WRITE_HIGH_BYTE_MASK;
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else
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Write_Memory_Params.ProgrammingCommands[2] &= ~READ_WRITE_HIGH_BYTE_MASK;
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PollAddress = (CurrentAddress & 0xFFFF);
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}
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/* If in word programming mode, commit the byte to the target's memory */
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if (!(ProgrammingMode & PROG_MODE_PAGED_WRITES_MASK))
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{
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/* If the current polling address is invalid, switch to timed delay write completion mode */
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if (!(PollAddress) && !(ProgrammingMode & PROG_MODE_WORD_READYBUSY_MASK))
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ProgrammingMode = (ProgrammingMode & ~PROG_MODE_WORD_VALUE_MASK) | PROG_MODE_WORD_TIMEDELAY_MASK;
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ProgrammingStatus = ISPTarget_WaitForProgComplete(ProgrammingMode, PollAddress, PollValue,
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Write_Memory_Params.DelayMS,
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Write_Memory_Params.ProgrammingCommands[2]);
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/* Abort the programming loop early if the byte/word programming failed */
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if (ProgrammingStatus != STATUS_CMD_OK)
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break;
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/* Must reset the polling address afterwards, so it is not erroneously used for the next byte */
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PollAddress = 0;
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}
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/* EEPROM just increments the address each byte, flash needs to increment on each word and
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* also check to ensure that a LOAD EXTENDED ADDRESS command is issued each time the extended
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* address boundary has been crossed during FLASH memory programming */
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if ((CurrentByte & 0x01) || (V2Command == CMD_PROGRAM_EEPROM_ISP))
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{
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CurrentAddress++;
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if ((V2Command == CMD_PROGRAM_FLASH_ISP) && !(CurrentAddress & 0xFFFF))
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MustLoadExtendedAddress = true;
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}
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}
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/* If the current page must be committed, send the PROGRAM PAGE command to the target */
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if (Write_Memory_Params.ProgrammingMode & PROG_MODE_COMMIT_PAGE_MASK)
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{
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ISPTarget_SendByte(Write_Memory_Params.ProgrammingCommands[1]);
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ISPTarget_SendByte(PageStartAddress >> 8);
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ISPTarget_SendByte(PageStartAddress & 0xFF);
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ISPTarget_SendByte(0x00);
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/* Check if polling is enabled and possible, if not switch to timed delay mode */
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if ((Write_Memory_Params.ProgrammingMode & PROG_MODE_PAGED_VALUE_MASK) && !(PollAddress))
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{
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Write_Memory_Params.ProgrammingMode = (Write_Memory_Params.ProgrammingMode & ~PROG_MODE_PAGED_VALUE_MASK) |
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PROG_MODE_PAGED_TIMEDELAY_MASK;
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}
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ProgrammingStatus = ISPTarget_WaitForProgComplete(Write_Memory_Params.ProgrammingMode, PollAddress, PollValue,
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Write_Memory_Params.DelayMS,
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Write_Memory_Params.ProgrammingCommands[2]);
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/* Check to see if the FLASH address has crossed the extended address boundary */
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if ((V2Command == CMD_PROGRAM_FLASH_ISP) && !(CurrentAddress & 0xFFFF))
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MustLoadExtendedAddress = true;
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}
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Endpoint_Write_8(V2Command);
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Endpoint_Write_8(ProgrammingStatus);
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Endpoint_ClearIN();
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}
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/** Handler for the CMD_READ_FLASH_ISP and CMD_READ_EEPROM_ISP commands, reading in bytes,
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* words or pages of data from the attached device.
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*
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* \param[in] V2Command Issued V2 Protocol command byte from the host
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*/
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void ISPProtocol_ReadMemory(uint8_t V2Command)
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{
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struct
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{
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uint16_t BytesToRead;
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uint8_t ReadMemoryCommand;
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} Read_Memory_Params;
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Endpoint_Read_Stream_LE(&Read_Memory_Params, sizeof(Read_Memory_Params), NULL);
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Read_Memory_Params.BytesToRead = SwapEndian_16(Read_Memory_Params.BytesToRead);
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Endpoint_ClearOUT();
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Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
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Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
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Endpoint_Write_8(V2Command);
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Endpoint_Write_8(STATUS_CMD_OK);
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/* Read each byte from the device and write them to the packet for the host */
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for (uint16_t CurrentByte = 0; CurrentByte < Read_Memory_Params.BytesToRead; CurrentByte++)
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{
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/* Check to see if we need to send a LOAD EXTENDED ADDRESS command to the target */
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if (MustLoadExtendedAddress)
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{
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ISPTarget_LoadExtendedAddress();
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MustLoadExtendedAddress = false;
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}
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/* Read the next byte from the desired memory space in the device */
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ISPTarget_SendByte(Read_Memory_Params.ReadMemoryCommand);
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ISPTarget_SendByte(CurrentAddress >> 8);
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ISPTarget_SendByte(CurrentAddress & 0xFF);
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Endpoint_Write_8(ISPTarget_ReceiveByte());
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/* Check if the endpoint bank is currently full, if so send the packet */
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if (!(Endpoint_IsReadWriteAllowed()))
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{
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Endpoint_ClearIN();
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Endpoint_WaitUntilReady();
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}
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/* AVR FLASH addressing requires us to modify the read command based on if we are reading a high
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* or low byte at the current word address */
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if (V2Command == CMD_READ_FLASH_ISP)
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Read_Memory_Params.ReadMemoryCommand ^= READ_WRITE_HIGH_BYTE_MASK;
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/* EEPROM just increments the address each byte, flash needs to increment on each word and
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* also check to ensure that a LOAD EXTENDED ADDRESS command is issued each time the extended
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* address boundary has been crossed */
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if ((CurrentByte & 0x01) || (V2Command == CMD_READ_EEPROM_ISP))
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{
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CurrentAddress++;
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if ((V2Command != CMD_READ_EEPROM_ISP) && !(CurrentAddress & 0xFFFF))
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MustLoadExtendedAddress = true;
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}
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}
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Endpoint_Write_8(STATUS_CMD_OK);
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bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
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Endpoint_ClearIN();
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/* Ensure last packet is a short packet to terminate the transfer */
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if (IsEndpointFull)
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{
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Endpoint_WaitUntilReady();
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|
Endpoint_ClearIN();
|
||
|
|
Endpoint_WaitUntilReady();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Handler for the CMD_CHI_ERASE_ISP command, clearing the target's FLASH memory. */
|
||
|
|
void ISPProtocol_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), NULL);
|
||
|
|
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
|
||
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
||
|
|
|
||
|
|
uint8_t ResponseStatus = STATUS_CMD_OK;
|
||
|
|
|
||
|
|
/* Send the chip erase commands as given by the host to the device */
|
||
|
|
for (uint8_t SByte = 0; SByte < sizeof(Erase_Chip_Params.EraseCommandBytes); SByte++)
|
||
|
|
ISPTarget_SendByte(Erase_Chip_Params.EraseCommandBytes[SByte]);
|
||
|
|
|
||
|
|
/* Use appropriate command completion check as given by the host (delay or busy polling) */
|
||
|
|
if (!(Erase_Chip_Params.PollMethod))
|
||
|
|
ISPProtocol_DelayMS(Erase_Chip_Params.EraseDelayMS);
|
||
|
|
else
|
||
|
|
ResponseStatus = ISPTarget_WaitWhileTargetBusy();
|
||
|
|
|
||
|
|
Endpoint_Write_8(CMD_CHIP_ERASE_ISP);
|
||
|
|
Endpoint_Write_8(ResponseStatus);
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Handler for the CMD_READ_FUSE_ISP, CMD_READ_LOCK_ISP, CMD_READ_SIGNATURE_ISP and CMD_READ_OSCCAL commands,
|
||
|
|
* reading the requested configuration byte from the device.
|
||
|
|
*
|
||
|
|
* \param[in] V2Command Issued V2 Protocol command byte from the host
|
||
|
|
*/
|
||
|
|
void ISPProtocol_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), NULL);
|
||
|
|
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
|
||
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
||
|
|
|
||
|
|
uint8_t ResponseBytes[4];
|
||
|
|
|
||
|
|
/* Send the Fuse or Lock byte read commands as given by the host to the device, store response */
|
||
|
|
for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
|
||
|
|
ResponseBytes[RByte] = ISPTarget_TransferByte(Read_FuseLockSigOSCCAL_Params.ReadCommandBytes[RByte]);
|
||
|
|
|
||
|
|
Endpoint_Write_8(V2Command);
|
||
|
|
Endpoint_Write_8(STATUS_CMD_OK);
|
||
|
|
Endpoint_Write_8(ResponseBytes[Read_FuseLockSigOSCCAL_Params.RetByte - 1]);
|
||
|
|
Endpoint_Write_8(STATUS_CMD_OK);
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Handler for the CMD_WRITE_FUSE_ISP and CMD_WRITE_LOCK_ISP commands, writing the requested configuration
|
||
|
|
* byte to the device.
|
||
|
|
*
|
||
|
|
* \param[in] V2Command Issued V2 Protocol command byte from the host
|
||
|
|
*/
|
||
|
|
void ISPProtocol_WriteFuseLock(uint8_t V2Command)
|
||
|
|
{
|
||
|
|
struct
|
||
|
|
{
|
||
|
|
uint8_t WriteCommandBytes[4];
|
||
|
|
} Write_FuseLockSig_Params;
|
||
|
|
|
||
|
|
Endpoint_Read_Stream_LE(&Write_FuseLockSig_Params, sizeof(Write_FuseLockSig_Params), NULL);
|
||
|
|
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
|
||
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
||
|
|
|
||
|
|
/* Send the Fuse or Lock byte program commands as given by the host to the device */
|
||
|
|
for (uint8_t SByte = 0; SByte < sizeof(Write_FuseLockSig_Params.WriteCommandBytes); SByte++)
|
||
|
|
ISPTarget_SendByte(Write_FuseLockSig_Params.WriteCommandBytes[SByte]);
|
||
|
|
|
||
|
|
Endpoint_Write_8(V2Command);
|
||
|
|
Endpoint_Write_8(STATUS_CMD_OK);
|
||
|
|
Endpoint_Write_8(STATUS_CMD_OK);
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Handler for the CMD_SPI_MULTI command, writing and reading arbitrary SPI data to and from the attached device. */
|
||
|
|
void ISPProtocol_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)), NULL);
|
||
|
|
Endpoint_Read_Stream_LE(&SPI_Multi_Params.TxData, SPI_Multi_Params.TxBytes, NULL);
|
||
|
|
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR);
|
||
|
|
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
|
||
|
|
|
||
|
|
Endpoint_Write_8(CMD_SPI_MULTI);
|
||
|
|
Endpoint_Write_8(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)
|
||
|
|
ISPTarget_SendByte(SPI_Multi_Params.TxData[CurrTxPos]);
|
||
|
|
else
|
||
|
|
ISPTarget_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_8(ISPTarget_TransferByte(SPI_Multi_Params.TxData[CurrTxPos++]));
|
||
|
|
else
|
||
|
|
Endpoint_Write_8(ISPTarget_ReceiveByte());
|
||
|
|
|
||
|
|
/* Check to see if we have filled the endpoint bank and need to send the packet */
|
||
|
|
if (!(Endpoint_IsReadWriteAllowed()))
|
||
|
|
{
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
Endpoint_WaitUntilReady();
|
||
|
|
}
|
||
|
|
|
||
|
|
CurrRxPos++;
|
||
|
|
}
|
||
|
|
|
||
|
|
Endpoint_Write_8(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();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Blocking delay for a given number of milliseconds. This provides a simple wrapper around
|
||
|
|
* the avr-libc provided delay function, so that the delay function can be called with a
|
||
|
|
* constant value (to prevent run-time floating point operations being required).
|
||
|
|
*
|
||
|
|
* \param[in] DelayMS Number of milliseconds to delay for
|
||
|
|
*/
|
||
|
|
void ISPProtocol_DelayMS(uint8_t DelayMS)
|
||
|
|
{
|
||
|
|
while (DelayMS-- && TimeoutTicksRemaining)
|
||
|
|
Delay_MS(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|