ISPTarget.c 6.54 KB
 Dean Camera committed May 08, 2010 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 39 /* LUFA Library Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* Copyright 2010 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. */ /** \file * * Target-related functions for the ISP Protocol decoder. */ #include "ISPTarget.h" #if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)  Dean Camera committed May 13, 2010 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 /** List of SPI prescaler masks for possible AVRStudio ISP programming speeds. */ static uint8_t SPIMaskFromSCKDuration[] PROGMEM = { #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 #elif (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 };  Dean Camera committed May 08, 2010 64 65 66 67 68 69 70 71 72 73 74 75 /** 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 */ uint8_t ISPTarget_GetSPIPrescalerMask(void) { uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION); if (SCKDuration >= sizeof(SPIMaskFromSCKDuration)) SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);  Dean Camera committed May 13, 2010 76  return pgm_read_byte(&SPIMaskFromSCKDuration[SCKDuration]);  Dean Camera committed May 08, 2010 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 } /** 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 interfere with normal device operation. * * \param[in] ResetTarget Boolean true when the target should be held in reset, false otherwise */ void ISPTarget_ChangeTargetResetLine(const bool ResetTarget) { if (ResetTarget) { AUX_LINE_DDR |= AUX_LINE_MASK; if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY))) AUX_LINE_PORT |= AUX_LINE_MASK; } else { AUX_LINE_DDR &= ~AUX_LINE_MASK; AUX_LINE_PORT &= ~AUX_LINE_MASK; } } /** Waits until the last issued target memory programming command has completed, via the check mode given and using * the given parameters. * * \param[in] ProgrammingMode Programming mode used and completion check to use, a mask of PROG_MODE_* constants * \param[in] PollAddress Memory address to poll for completion if polling check mode used * \param[in] PollValue Poll value to check against if polling check mode used * \param[in] DelayMS Milliseconds to delay before returning if delay check mode used * \param[in] 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 */ uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode, const uint16_t PollAddress, const uint8_t PollValue, const uint8_t DelayMS, const uint8_t ReadMemCommand) { uint8_t ProgrammingStatus = STATUS_CMD_OK; /* 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: ISPProtocol_DelayMS(DelayMS); break; case PROG_MODE_WORD_VALUE_MASK: case PROG_MODE_PAGED_VALUE_MASK: do { SPI_SendByte(ReadMemCommand); SPI_SendByte(PollAddress >> 8); SPI_SendByte(PollAddress & 0xFF); }  Dean Camera committed Jul 13, 2010 132  while ((SPI_TransferByte(0x00) == PollValue) && TimeoutTicksRemaining);  Dean Camera committed May 08, 2010 133   Dean Camera committed Jul 13, 2010 134  if (!(TimeoutTicksRemaining))  Dean Camera committed May 08, 2010 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159  ProgrammingStatus = STATUS_CMD_TOUT; break; case PROG_MODE_WORD_READYBUSY_MASK: case PROG_MODE_PAGED_READYBUSY_MASK: ProgrammingStatus = ISPTarget_WaitWhileTargetBusy(); break; } return ProgrammingStatus; } /** Waits until the target has completed the last operation, by continuously polling the device's * BUSY flag until it is cleared, or until the command timeout period has expired. * * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise */ uint8_t ISPTarget_WaitWhileTargetBusy(void) { do { SPI_SendByte(0xF0); SPI_SendByte(0x00); SPI_SendByte(0x00); }  Dean Camera committed Jul 13, 2010 160  while ((SPI_ReceiveByte() & 0x01) && TimeoutTicksRemaining);  Dean Camera committed May 08, 2010 161   Dean Camera committed Jul 13, 2010 162  return TimeoutTicksRemaining ? STATUS_CMD_OK : STATUS_RDY_BSY_TOUT;  Dean Camera committed May 08, 2010 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 } /** 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. */ void ISPTarget_LoadExtendedAddress(void) { SPI_SendByte(LOAD_EXTENDED_ADDRESS_CMD); SPI_SendByte(0x00); SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16); SPI_SendByte(0x00); } #endif