V2ProtocolTarget.c 6.75 KB
 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 /* 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 * * Target-related functions for the V2 Protocol decoder. */ #include "V2ProtocolTarget.h" /** Current memory address for FLASH/EEPROM memory read/write commands */  Dean Camera committed Aug 25, 2009 39 uint32_t CurrentAddress;  40   Dean Camera committed Aug 25, 2009 41 42 43 44 45 /** Converts the given AVR Studio SCK duration parameter (set by a SET PARAM command from the host) to the nearest * possible SPI clock prescaler mask for passing to the SPI_Init() routine. * * \return Nearest SPI prescaler mask for the given SCK frequency */  Dean Camera committed Aug 23, 2009 46 47 uint8_t V2Protocol_GetSPIPrescalerMask(void) {  Dean Camera committed Aug 25, 2009 48  static const uint8_t SPIMaskFromSCKDuration[TOTAL_PROGRAMMING_SPEEDS] =  49  {  Dean Camera committed Aug 25, 2009 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68  #if (F_CPU == 8000000) SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 4MHz SPI SPI_SPEED_FCPU_DIV_2, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI SPI_SPEED_FCPU_DIV_4, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI SPI_SPEED_FCPU_DIV_8, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI SPI_SPEED_FCPU_DIV_16, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI SPI_SPEED_FCPU_DIV_32, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI SPI_SPEED_FCPU_DIV_64 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI #if (F_CPU == 16000000) SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 8MHz SPI SPI_SPEED_FCPU_DIV_4, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI SPI_SPEED_FCPU_DIV_8, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI SPI_SPEED_FCPU_DIV_16, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI SPI_SPEED_FCPU_DIV_32, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI SPI_SPEED_FCPU_DIV_64, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI SPI_SPEED_FCPU_DIV_128 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI #else #error No SPI prescaler masks for chosen F_CPU speed. #endif  69 70 71 72 73 74 75 76 77 78  }; uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION); if (SCKDuration >= sizeof(SPIMaskFromSCKDuration)) SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1); return SPIMaskFromSCKDuration[SCKDuration]; }  Dean Camera committed Aug 25, 2009 79 80 81 82 83 /** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command. * When not asserted, the line is tristated so as not to intefere with normal device operation. * * \param ResetTarget Boolean true when the target should be held in reset, false otherwise */  84 85 86 87 88 89 90 91 92 93 94 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 {  Dean Camera committed Aug 24, 2009 95  RESET_LINE_PORT &= ~RESET_LINE_MASK;  96 97 98 99  RESET_LINE_DDR &= ~RESET_LINE_MASK; } }  Dean Camera committed Aug 25, 2009 100 101 102 103 104 105 106 107 108 109 110 111 /** Waits until the last issued target memory programming command has completed, via the check mode given and using * the given parameters. * * \param ProgrammingMode Programming mode used and completion check to use, a mask of PROG_MODE_* constants * \param PollAddress Memory address to poll for completion if polling check mode used * \param PollValue Poll value to check against if polling check mode used * \param DelayMS Milliseconds to delay before returning if delay check mode used * \param ReadMemCommand Device low-level READ MEMORY command to send if value check mode used * * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or * \ref STATUS_CMD_TOUT otherwise */  112 uint8_t V2Protocol_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAddress, uint8_t PollValue,  Dean Camera committed Aug 24, 2009 113  uint8_t DelayMS, uint8_t ReadMemCommand)  Dean Camera committed Aug 24, 2009 114 {  115  uint8_t ProgrammingStatus = STATUS_CMD_OK;  Dean Camera committed Aug 24, 2009 116   117 118 119 120 121 122 123 124 125  /* Determine method of Programming Complete check */ switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK)) { case PROG_MODE_WORD_TIMEDELAY_MASK: case PROG_MODE_PAGED_TIMEDELAY_MASK: V2Protocol_DelayMS(DelayMS); break; case PROG_MODE_WORD_VALUE_MASK: case PROG_MODE_PAGED_VALUE_MASK:  Dean Camera committed Aug 25, 2009 126  TCNT0 = 0;  127 128 129 130 131 132 133 134 135 136  do { SPI_SendByte(ReadMemCommand); SPI_SendByte(PollAddress >> 8); SPI_SendByte(PollAddress & 0xFF); } while ((SPI_TransferByte(0x00) != PollValue) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS)); if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)  Dean Camera committed Aug 25, 2009 137  ProgrammingStatus = STATUS_CMD_TOUT;  138 139 140 141 142  break; case PROG_MODE_WORD_READYBUSY_MASK: case PROG_MODE_PAGED_READYBUSY_MASK: ProgrammingStatus = V2Protocol_WaitWhileTargetBusy();  Dean Camera committed Aug 24, 2009 143  break;  144 145 146  } return ProgrammingStatus;  Dean Camera committed Aug 24, 2009 147 148 }  Dean Camera committed Aug 25, 2009 149 150 151 152 153 /** Waits until the target has completed the last operation, by continuously polling the device's * BUSY flag until it is cleared, or until the \ref TARGET_BUSY_TIMEOUT_MS timeout period has expired. * * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise */  154 155 uint8_t V2Protocol_WaitWhileTargetBusy(void) {  Dean Camera committed Aug 25, 2009 156  TCNT0 = 0;  157   158 159 160 161 162 163 164  do { SPI_SendByte(0xF0); SPI_SendByte(0x00); SPI_SendByte(0x00); }  Dean Camera committed Aug 24, 2009 165  while ((SPI_ReceiveByte() & 0x01) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));  166   167 168  if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS) return STATUS_RDY_BSY_TOUT;  169 170 171 172  else return STATUS_CMD_OK; }  Dean Camera committed Aug 25, 2009 173 174 175 176 /** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the * 64KB boundary. This sends the command with the correct address as indicated by the current address * pointer variable set by the host when a SET ADDRESS command is issued. */  177 178 179 180 181 182 183 void V2Protocol_LoadExtendedAddress(void) { SPI_SendByte(0x4D); SPI_SendByte(0x00); SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16); SPI_SendByte(0x00); }