protocol/lufa/LUFA-git/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaims all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Target-related functions for the ISP Protocol decoder.
  34  */
  35
  36 #include "ISPTarget.h"
  37
  38 #if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
  39
  40 /** List of hardware SPI prescaler masks for possible AVRStudio ISP programming speeds.
  41  *
  42  *  \hideinitializer
  43  */
  44 static const uint8_t SPIMaskFromSCKDuration[] PROGMEM =
  45 {
  46 #if (F_CPU == 8000000)
  47         SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   8MHz SPI, Actual =   4MHz SPI
  48         SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   4MHz SPI, Actual =   4MHz SPI
  49         SPI_SPEED_FCPU_DIV_4,    // AVRStudio =   2MHz SPI, Actual =   2MHz SPI
  50         SPI_SPEED_FCPU_DIV_8,    // AVRStudio =   1MHz SPI, Actual =   1MHz SPI
  51         SPI_SPEED_FCPU_DIV_16,   // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
  52         SPI_SPEED_FCPU_DIV_32,   // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
  53         SPI_SPEED_FCPU_DIV_64,   // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
  54 #elif (F_CPU == 16000000)
  55         SPI_SPEED_FCPU_DIV_2,    // AVRStudio =   8MHz SPI, Actual =   8MHz SPI
  56         SPI_SPEED_FCPU_DIV_4,    // AVRStudio =   4MHz SPI, Actual =   4MHz SPI
  57         SPI_SPEED_FCPU_DIV_8,    // AVRStudio =   2MHz SPI, Actual =   2MHz SPI
  58         SPI_SPEED_FCPU_DIV_16,   // AVRStudio =   1MHz SPI, Actual =   1MHz SPI
  59         SPI_SPEED_FCPU_DIV_32,   // AVRStudio = 500KHz SPI, Actual = 500KHz SPI
  60         SPI_SPEED_FCPU_DIV_64,   // AVRStudio = 250KHz SPI, Actual = 250KHz SPI
  61         SPI_SPEED_FCPU_DIV_128   // AVRStudio = 125KHz SPI, Actual = 125KHz SPI
  62 #else
  63         #error No SPI prescaler masks for chosen F_CPU speed.
  64 #endif
  65 };
  66
  67 /** Lookup table to convert the slower ISP speeds into a compare value for the software SPI driver.
  68  *
  69  *  \hideinitializer
  70  */
  71 static const uint16_t TimerCompareFromSCKDuration[] PROGMEM =
  72 {
  73         TIMER_COMP(96386), TIMER_COMP(89888), TIMER_COMP(84211), TIMER_COMP(79208), TIMER_COMP(74767),
  74         TIMER_COMP(70797), TIMER_COMP(67227), TIMER_COMP(64000), TIMER_COMP(61069), TIMER_COMP(58395),
  75         TIMER_COMP(55945), TIMER_COMP(51613), TIMER_COMP(49690), TIMER_COMP(47905), TIMER_COMP(46243),
  76         TIMER_COMP(43244), TIMER_COMP(41885), TIMER_COMP(39409), TIMER_COMP(38278), TIMER_COMP(36200),
  77         TIMER_COMP(34335), TIMER_COMP(32654), TIMER_COMP(31129), TIMER_COMP(29740), TIMER_COMP(28470),
  78         TIMER_COMP(27304), TIMER_COMP(25724), TIMER_COMP(24768), TIMER_COMP(23461), TIMER_COMP(22285),
  79         TIMER_COMP(21221), TIMER_COMP(20254), TIMER_COMP(19371), TIMER_COMP(18562), TIMER_COMP(17583),
  80         TIMER_COMP(16914), TIMER_COMP(16097), TIMER_COMP(15356), TIMER_COMP(14520), TIMER_COMP(13914),
  81         TIMER_COMP(13224), TIMER_COMP(12599), TIMER_COMP(12031), TIMER_COMP(11511), TIMER_COMP(10944),
  82         TIMER_COMP(10431), TIMER_COMP(9963),  TIMER_COMP(9468),  TIMER_COMP(9081),  TIMER_COMP(8612),
  83         TIMER_COMP(8239),  TIMER_COMP(7851),  TIMER_COMP(7498),  TIMER_COMP(7137),  TIMER_COMP(6809),
  84         TIMER_COMP(6478),  TIMER_COMP(6178),  TIMER_COMP(5879),  TIMER_COMP(5607),  TIMER_COMP(5359),
  85         TIMER_COMP(5093),  TIMER_COMP(4870),  TIMER_COMP(4633),  TIMER_COMP(4418),  TIMER_COMP(4209),
  86         TIMER_COMP(4019),  TIMER_COMP(3823),  TIMER_COMP(3645),  TIMER_COMP(3474),  TIMER_COMP(3310),
  87         TIMER_COMP(3161),  TIMER_COMP(3011),  TIMER_COMP(2869),  TIMER_COMP(2734),  TIMER_COMP(2611),
  88         TIMER_COMP(2484),  TIMER_COMP(2369),  TIMER_COMP(2257),  TIMER_COMP(2152),  TIMER_COMP(2052),
  89         TIMER_COMP(1956),  TIMER_COMP(1866),  TIMER_COMP(1779),  TIMER_COMP(1695),  TIMER_COMP(1615),
  90         TIMER_COMP(1539),  TIMER_COMP(1468),  TIMER_COMP(1398),  TIMER_COMP(1333),  TIMER_COMP(1271),
  91         TIMER_COMP(1212),  TIMER_COMP(1155),  TIMER_COMP(1101),  TIMER_COMP(1049),  TIMER_COMP(1000),
  92         TIMER_COMP(953),   TIMER_COMP(909),   TIMER_COMP(866),   TIMER_COMP(826),   TIMER_COMP(787),
  93         TIMER_COMP(750),   TIMER_COMP(715),   TIMER_COMP(682),   TIMER_COMP(650),   TIMER_COMP(619),
  94         TIMER_COMP(590),   TIMER_COMP(563),   TIMER_COMP(536),   TIMER_COMP(511),   TIMER_COMP(487),
  95         TIMER_COMP(465),   TIMER_COMP(443),   TIMER_COMP(422),   TIMER_COMP(402),   TIMER_COMP(384),
  96         TIMER_COMP(366),   TIMER_COMP(349),   TIMER_COMP(332),   TIMER_COMP(317),   TIMER_COMP(302),
  97         TIMER_COMP(288),   TIMER_COMP(274),   TIMER_COMP(261),   TIMER_COMP(249),   TIMER_COMP(238),
  98         TIMER_COMP(226),   TIMER_COMP(216),   TIMER_COMP(206),   TIMER_COMP(196),   TIMER_COMP(187),
  99         TIMER_COMP(178),   TIMER_COMP(170),   TIMER_COMP(162),   TIMER_COMP(154),   TIMER_COMP(147),
 100         TIMER_COMP(140),   TIMER_COMP(134),   TIMER_COMP(128),   TIMER_COMP(122),   TIMER_COMP(116),
 101         TIMER_COMP(111),   TIMER_COMP(105),   TIMER_COMP(100),   TIMER_COMP(95.4),  TIMER_COMP(90.9),
 102         TIMER_COMP(86.6),  TIMER_COMP(82.6),  TIMER_COMP(78.7),  TIMER_COMP(75.0),  TIMER_COMP(71.5),
 103         TIMER_COMP(68.2),  TIMER_COMP(65.0),  TIMER_COMP(61.9),  TIMER_COMP(59.0),  TIMER_COMP(56.3),
 104         TIMER_COMP(53.6),  TIMER_COMP(51.1)
 105 };
 106
 107 /** Currently selected SPI driver, either hardware (for fast ISP speeds) or software (for slower ISP speeds). */
 108 bool HardwareSPIMode = true;
 109
 110 /** Software SPI data register for sending and receiving */
 111 static volatile uint8_t SoftSPI_Data;
 112
 113 /** Number of bits left to transfer in the software SPI driver */
 114 static volatile uint8_t SoftSPI_BitsRemaining;
 115
 116
 117 /** ISR to handle software SPI transmission and reception */
 118 ISR(TIMER1_COMPA_vect, ISR_BLOCK)
 119 {
 120         /* Check if rising edge (output next bit) or falling edge (read in next bit) */
 121         if (!(PINB & (1 << 1)))
 122         {
 123                 if (SoftSPI_Data & (1 << 7))
 124                   PORTB |=  (1 << 2);
 125                 else
 126                   PORTB &= ~(1 << 2);
 127         }
 128         else
 129         {
 130                 SoftSPI_Data <<= 1;
 131
 132                 if (!(--SoftSPI_BitsRemaining))
 133                 {
 134                         TCCR1B = 0;
 135                         TIFR1  = (1 << OCF1A);
 136                 }
 137
 138                 if (PINB & (1 << 3))
 139                   SoftSPI_Data |= (1 << 0);
 140         }
 141
 142         /* Fast toggle of PORTB.1 via the PIN register (see datasheet) */
 143         PINB |= (1 << 1);
 144 }
 145
 146 /** Initializes the appropriate SPI driver (hardware or software, depending on the selected ISP speed) ready for
 147  *  communication with the attached target.
 148  */
 149 void ISPTarget_EnableTargetISP(void)
 150 {
 151         uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
 152
 153         if (SCKDuration < sizeof(SPIMaskFromSCKDuration))
 154         {
 155                 HardwareSPIMode = true;
 156
 157                 SPI_Init(pgm_read_byte(&SPIMaskFromSCKDuration[SCKDuration]) | SPI_ORDER_MSB_FIRST |
 158                                        SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_MODE_MASTER);
 159         }
 160         else
 161         {
 162                 HardwareSPIMode = false;
 163
 164                 DDRB  |= ((1 << 1) | (1 << 2));
 165                 PORTB |= ((1 << 0) | (1 << 3));
 166
 167                 ISPTarget_ConfigureSoftwareSPI(SCKDuration);
 168         }
 169 }
 170
 171 /** Shuts down the current selected SPI driver (hardware or software, depending on the selected ISP speed) so that no
 172  *  further communications can occur until the driver is re-initialized.
 173  */
 174 void ISPTarget_DisableTargetISP(void)
 175 {
 176         if (HardwareSPIMode)
 177         {
 178                 SPI_Disable();
 179         }
 180         else
 181         {
 182                 DDRB  &= ~((1 << 1) | (1 << 2));
 183                 PORTB &= ~((1 << 0) | (1 << 3));
 184
 185                 /* Must re-enable rescue clock once software ISP has exited, as the timer for the rescue clock is
 186                  * re-purposed for software SPI */
 187                 ISPTarget_ConfigureRescueClock();
 188         }
 189 }
 190
 191 /** Configures the AVR to produce a 4MHz rescue clock out of the OCR1A pin of the AVR, so
 192  *  that it can be fed into the XTAL1 pin of an AVR whose fuses have been mis-configured for
 193  *  an external clock rather than a crystal. When used, the ISP speed must be 125KHz for this
 194  *  functionality to work correctly.
 195  */
 196 void ISPTarget_ConfigureRescueClock(void)
 197 {
 198         #if defined(XCK_RESCUE_CLOCK_ENABLE)
 199                 /* Configure XCK as an output for the specified AVR model */
 200                 DDRD  |= (1 << 5);
 201
 202                 /* Start USART to generate a 4MHz clock on the XCK pin */
 203                 UBRR1  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
 204                 UCSR1B = (1 << TXEN1);
 205                 UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
 206         #else
 207                 /* Configure OCR1A as an output for the specified AVR model */
 208                 #if defined(USB_SERIES_2_AVR)
 209                 DDRC |= (1 << 6);
 210                 #else
 211                 DDRB |= (1 << 5);
 212                 #endif
 213
 214                 /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
 215                 TIMSK1 = 0;
 216                 TCNT1  = 0;
 217                 OCR1A  = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
 218                 TCCR1A = (1 << COM1A0);
 219                 TCCR1B = ((1 << WGM12) | (1 << CS10));
 220         #endif
 221 }
 222
 223 /** Configures the AVR's timer ready to produce software SPI for the slower ISP speeds that
 224  *  cannot be obtained when using the AVR's hardware SPI module.
 225  *
 226  *  \param[in] SCKDuration  Duration of the desired software ISP SCK clock
 227  */
 228 void ISPTarget_ConfigureSoftwareSPI(const uint8_t SCKDuration)
 229 {
 230         /* Configure Timer 1 for software SPI using the specified SCK duration */
 231         TIMSK1 = (1 << OCIE1A);
 232         TCNT1  = 0;
 233         OCR1A  = pgm_read_word(&TimerCompareFromSCKDuration[SCKDuration - sizeof(SPIMaskFromSCKDuration)]);
 234         TCCR1A = 0;
 235         TCCR1B = 0;
 236 }
 237
 238 /** Sends and receives a single byte of data to and from the attached target via software SPI.
 239  *
 240  *  \param[in] Byte  Byte of data to send to the attached target
 241  *
 242  *  \return Received byte of data from the attached target
 243  */
 244 uint8_t ISPTarget_TransferSoftSPIByte(const uint8_t Byte)
 245 {
 246         SoftSPI_Data          = Byte;
 247         SoftSPI_BitsRemaining = 8;
 248
 249         /* Set initial MOSI pin state according to the byte to be transferred */
 250         if (SoftSPI_Data & (1 << 7))
 251           PORTB |=  (1 << 2);
 252         else
 253           PORTB &= ~(1 << 2);
 254
 255         TCNT1  = 0;
 256         TCCR1B = ((1 << WGM12) | (1 << CS11));
 257         while (SoftSPI_BitsRemaining && TimeoutTicksRemaining);
 258         TCCR1B = 0;
 259
 260         return SoftSPI_Data;
 261 }
 262
 263 /** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command.
 264  *  When not asserted, the line is tristated so as not to interfere with normal device operation.
 265  *
 266  *  \param[in] ResetTarget  Boolean true when the target should be held in reset, \c false otherwise
 267  */
 268 void ISPTarget_ChangeTargetResetLine(const bool ResetTarget)
 269 {
 270         if (ResetTarget)
 271         {
 272                 AUX_LINE_DDR |= AUX_LINE_MASK;
 273
 274                 if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))
 275                   AUX_LINE_PORT |=  AUX_LINE_MASK;
 276                 else
 277                   AUX_LINE_PORT &= ~AUX_LINE_MASK;
 278         }
 279         else
 280         {
 281                 AUX_LINE_DDR  &= ~AUX_LINE_MASK;
 282                 AUX_LINE_PORT &= ~AUX_LINE_MASK;
 283         }
 284 }
 285
 286 /** Waits until the target has completed the last operation, by continuously polling the device's
 287  *  BUSY flag until it is cleared, or until the command timeout period has expired.
 288  *
 289  *  \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise
 290  */
 291 uint8_t ISPTarget_WaitWhileTargetBusy(void)
 292 {
 293         do
 294         {
 295                 ISPTarget_SendByte(0xF0);
 296                 ISPTarget_SendByte(0x00);
 297                 ISPTarget_SendByte(0x00);
 298         }
 299         while ((ISPTarget_ReceiveByte() & 0x01) && TimeoutTicksRemaining);
 300
 301         return (TimeoutTicksRemaining > 0) ? STATUS_CMD_OK : STATUS_RDY_BSY_TOUT;
 302 }
 303
 304 /** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the
 305  *  64KB boundary. This sends the command with the correct address as indicated by the current address
 306  *  pointer variable set by the host when a SET ADDRESS command is issued.
 307  */
 308 void ISPTarget_LoadExtendedAddress(void)
 309 {
 310         ISPTarget_SendByte(LOAD_EXTENDED_ADDRESS_CMD);
 311         ISPTarget_SendByte(0x00);
 312         ISPTarget_SendByte(CurrentAddress >> 16);
 313         ISPTarget_SendByte(0x00);
 314 }
 315
 316 /** Waits until the last issued target memory programming command has completed, via the check mode given and using
 317  *  the given parameters.
 318  *
 319  *  \param[in] ProgrammingMode  Programming mode used and completion check to use, a mask of \c PROG_MODE_* constants
 320  *  \param[in] PollAddress      Memory address to poll for completion if polling check mode used
 321  *  \param[in] PollValue        Poll value to check against if polling check mode used
 322  *  \param[in] DelayMS          Milliseconds to delay before returning if delay check mode used
 323  *  \param[in] ReadMemCommand   Device low-level READ MEMORY command to send if value check mode used
 324  *
 325  *  \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or
 326  *          \ref STATUS_CMD_TOUT otherwise
 327  */
 328 uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode,
 329                                       const uint16_t PollAddress,
 330                                       const uint8_t PollValue,
 331                                       const uint8_t DelayMS,
 332                                       const uint8_t ReadMemCommand)
 333 {
 334         uint8_t ProgrammingStatus = STATUS_CMD_OK;
 335
 336         /* Determine method of Programming Complete check */
 337         switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK))
 338         {
 339                 case PROG_MODE_WORD_TIMEDELAY_MASK:
 340                 case PROG_MODE_PAGED_TIMEDELAY_MASK:
 341                         ISPProtocol_DelayMS(DelayMS);
 342                         break;
 343                 case PROG_MODE_WORD_VALUE_MASK:
 344                 case PROG_MODE_PAGED_VALUE_MASK:
 345                         do
 346                         {
 347                                 ISPTarget_SendByte(ReadMemCommand);
 348                                 ISPTarget_SendByte(PollAddress >> 8);
 349                                 ISPTarget_SendByte(PollAddress & 0xFF);
 350                         }
 351                         while ((ISPTarget_TransferByte(0x00) == PollValue) && TimeoutTicksRemaining);
 352
 353                         if (!(TimeoutTicksRemaining))
 354                           ProgrammingStatus = STATUS_CMD_TOUT;
 355
 356                         break;
 357                 case PROG_MODE_WORD_READYBUSY_MASK:
 358                 case PROG_MODE_PAGED_READYBUSY_MASK:
 359                         ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();
 360                         break;
 361         }
 362
 363         /* Program complete - reset timeout */
 364         TimeoutTicksRemaining = COMMAND_TIMEOUT_TICKS;
 365
 366         return ProgrammingStatus;
 367 }
 368
 369 #endif
 370