/*
LUFA Library
- Copyright (C) Dean Camera, 2010.
-
+ Copyright (C) Dean Camera, 2011.
+
dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
+ www.lufa-lib.org
*/
/*
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+ Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
- Permission to use, copy, modify, distribute, and sell this
+ 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
+ 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
+ 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
#if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)
-/** List of SPI prescaler masks for possible AVRStudio ISP programming speeds. */
+/** List of hardware SPI prescaler masks for possible AVRStudio ISP programming speeds.
+ *
+ * \hideinitializer
+ */
static uint8_t SPIMaskFromSCKDuration[] PROGMEM =
{
#if (F_CPU == 8000000)
#endif
};
-/** 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.
+/** Lookup table to convert the slower ISP speeds into a compare value for the software SPI driver.
*
- * \return Nearest SPI prescaler mask for the given SCK frequency
+ * \hideinitializer
*/
-uint8_t ISPTarget_GetSPIPrescalerMask(void)
+static uint16_t TimerCompareFromSCKDuration[] PROGMEM =
+{
+ TIMER_COMP(96386), TIMER_COMP(89888), TIMER_COMP(84211), TIMER_COMP(79208), TIMER_COMP(74767),
+ TIMER_COMP(70797), TIMER_COMP(67227), TIMER_COMP(64000), TIMER_COMP(61069), TIMER_COMP(58395),
+ TIMER_COMP(55945), TIMER_COMP(51613), TIMER_COMP(49690), TIMER_COMP(47905), TIMER_COMP(46243),
+ TIMER_COMP(43244), TIMER_COMP(41885), TIMER_COMP(39409), TIMER_COMP(38278), TIMER_COMP(36200),
+ TIMER_COMP(34335), TIMER_COMP(32654), TIMER_COMP(31129), TIMER_COMP(29740), TIMER_COMP(28470),
+ TIMER_COMP(27304), TIMER_COMP(25724), TIMER_COMP(24768), TIMER_COMP(23461), TIMER_COMP(22285),
+ TIMER_COMP(21221), TIMER_COMP(20254), TIMER_COMP(19371), TIMER_COMP(18562), TIMER_COMP(17583),
+ TIMER_COMP(16914), TIMER_COMP(16097), TIMER_COMP(15356), TIMER_COMP(14520), TIMER_COMP(13914),
+ TIMER_COMP(13224), TIMER_COMP(12599), TIMER_COMP(12031), TIMER_COMP(11511), TIMER_COMP(10944),
+ TIMER_COMP(10431), TIMER_COMP(9963), TIMER_COMP(9468), TIMER_COMP(9081), TIMER_COMP(8612),
+ TIMER_COMP(8239), TIMER_COMP(7851), TIMER_COMP(7498), TIMER_COMP(7137), TIMER_COMP(6809),
+ TIMER_COMP(6478), TIMER_COMP(6178), TIMER_COMP(5879), TIMER_COMP(5607), TIMER_COMP(5359),
+ TIMER_COMP(5093), TIMER_COMP(4870), TIMER_COMP(4633), TIMER_COMP(4418), TIMER_COMP(4209),
+ TIMER_COMP(4019), TIMER_COMP(3823), TIMER_COMP(3645), TIMER_COMP(3474), TIMER_COMP(3310),
+ TIMER_COMP(3161), TIMER_COMP(3011), TIMER_COMP(2869), TIMER_COMP(2734), TIMER_COMP(2611),
+ TIMER_COMP(2484), TIMER_COMP(2369), TIMER_COMP(2257), TIMER_COMP(2152), TIMER_COMP(2052),
+ TIMER_COMP(1956), TIMER_COMP(1866), TIMER_COMP(1779), TIMER_COMP(1695), TIMER_COMP(1615),
+ TIMER_COMP(1539), TIMER_COMP(1468), TIMER_COMP(1398), TIMER_COMP(1333), TIMER_COMP(1271),
+ TIMER_COMP(1212), TIMER_COMP(1155), TIMER_COMP(1101), TIMER_COMP(1049), TIMER_COMP(1000),
+ TIMER_COMP(953), TIMER_COMP(909), TIMER_COMP(866), TIMER_COMP(826), TIMER_COMP(787),
+ TIMER_COMP(750), TIMER_COMP(715), TIMER_COMP(682), TIMER_COMP(650), TIMER_COMP(619),
+ TIMER_COMP(590), TIMER_COMP(563), TIMER_COMP(536), TIMER_COMP(511), TIMER_COMP(487),
+ TIMER_COMP(465), TIMER_COMP(443), TIMER_COMP(422), TIMER_COMP(402), TIMER_COMP(384),
+ TIMER_COMP(366), TIMER_COMP(349), TIMER_COMP(332), TIMER_COMP(317), TIMER_COMP(302),
+ TIMER_COMP(288), TIMER_COMP(274), TIMER_COMP(261), TIMER_COMP(249), TIMER_COMP(238),
+ TIMER_COMP(226), TIMER_COMP(216), TIMER_COMP(206), TIMER_COMP(196), TIMER_COMP(187),
+ TIMER_COMP(178), TIMER_COMP(170), TIMER_COMP(162), TIMER_COMP(154), TIMER_COMP(147),
+ TIMER_COMP(140), TIMER_COMP(134), TIMER_COMP(128), TIMER_COMP(122), TIMER_COMP(116),
+ TIMER_COMP(111), TIMER_COMP(105), TIMER_COMP(100), TIMER_COMP(95.4), TIMER_COMP(90.9),
+ TIMER_COMP(86.6), TIMER_COMP(82.6), TIMER_COMP(78.7), TIMER_COMP(75.0), TIMER_COMP(71.5),
+ TIMER_COMP(68.2), TIMER_COMP(65.0), TIMER_COMP(61.9), TIMER_COMP(59.0), TIMER_COMP(56.3),
+ TIMER_COMP(53.6), TIMER_COMP(51.1)
+};
+
+/** Currently selected SPI driver, either hardware (for fast ISP speeds) or software (for slower ISP speeds). */
+bool HardwareSPIMode = true;
+
+/** Software SPI data register for sending and receiving */
+static volatile uint8_t SoftSPI_Data;
+
+/** Number of bits left to transfer in the software SPI driver */
+static volatile uint8_t SoftSPI_BitsRemaining;
+
+
+/** ISR to handle software SPI transmission and reception */
+ISR(TIMER1_COMPA_vect, ISR_BLOCK)
+{
+ /* Check if rising edge (output next bit) or falling edge (read in next bit) */
+ if (!(PINB & (1 << 1)))
+ {
+ if (SoftSPI_Data & (1 << 7))
+ PORTB |= (1 << 2);
+ else
+ PORTB &= ~(1 << 2);
+ }
+ else
+ {
+ SoftSPI_Data <<= 1;
+
+ if (!(SoftSPI_BitsRemaining--))
+ TCCR1B = 0;
+
+ if (PINB & (1 << 3))
+ SoftSPI_Data |= (1 << 0);
+ }
+
+ /* Fast toggle of PORTB.1 via the PIN register (see datasheet) */
+ PINB |= (1 << 1);
+}
+
+/** Initializes the appropriate SPI driver (hardware or software, depending on the selected ISP speed) ready for
+ * communication with the attached target.
+ */
+void ISPTarget_EnableTargetISP(void)
{
uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);
- if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))
- SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);
-
- return pgm_read_byte(&SPIMaskFromSCKDuration[SCKDuration]);
+ if (SCKDuration < sizeof(SPIMaskFromSCKDuration))
+ {
+ HardwareSPIMode = true;
+
+ SPI_Init(pgm_read_byte(&SPIMaskFromSCKDuration[SCKDuration]) | SPI_ORDER_MSB_FIRST |
+ SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_MODE_MASTER);
+ }
+ else
+ {
+ HardwareSPIMode = false;
+
+ DDRB |= ((1 << 1) | (1 << 2));
+ PORTB |= ((1 << 0) | (1 << 3));
+
+ ISPTarget_ConfigureSoftwareSPI(SCKDuration);
+ }
+}
+
+/** Shuts down the current selected SPI driver (hardware or software, depending on the selected ISP speed) so that no
+ * further communications can occur until the driver is re-initialized.
+ */
+void ISPTarget_DisableTargetISP(void)
+{
+ if (HardwareSPIMode)
+ {
+ SPI_Disable();
+ }
+ else
+ {
+ DDRB &= ~((1 << 1) | (1 << 2));
+ PORTB &= ~((1 << 0) | (1 << 3));
+
+ /* Must re-enable rescue clock once software ISP has exited, as the timer for the rescue clock is
+ * re-purposed for software SPI */
+ ISPTarget_ConfigureRescueClock();
+ }
+}
+
+/** Configures the AVR to produce a 4MHz rescue clock out of the OCR1A pin of the AVR, so
+ * that it can be fed into the XTAL1 pin of an AVR whose fuses have been mis-configured for
+ * an external clock rather than a crystal. When used, the ISP speed must be 125KHz for this
+ * functionality to work correctly.
+ */
+void ISPTarget_ConfigureRescueClock(void)
+{
+ #if defined(XCK_RESCUE_CLOCK_ENABLE)
+ /* Configure XCK as an output for the specified AVR model */
+ DDRD |= (1 << 5);
+
+ /* Start USART to generate a 4MHz clock on the XCK pin */
+ UBRR1 = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+ UCSR1B = (1 << TXEN1);
+ UCSR1C = (1 << UMSEL10) | (1 << UPM11) | (1 << USBS1) | (1 << UCSZ11) | (1 << UCSZ10) | (1 << UCPOL1);
+ #else
+ /* Configure OCR1A as an output for the specified AVR model */
+ #if defined(USB_SERIES_2_AVR)
+ DDRC |= (1 << 6);
+ #else
+ DDRB |= (1 << 5);
+ #endif
+
+ /* Start Timer 1 to generate a 4MHz clock on the OCR1A pin */
+ TIMSK1 = 0;
+ TCNT1 = 0;
+ OCR1A = ((F_CPU / 2 / ISP_RESCUE_CLOCK_SPEED) - 1);
+ TCCR1A = (1 << COM1A0);
+ TCCR1B = ((1 << WGM12) | (1 << CS10));
+ #endif
+}
+
+/** Configures the AVR's timer ready to produce software SPI for the slower ISP speeds that
+ * cannot be obtained when using the AVR's hardware SPI module.
+ *
+ * \param[in] SCKDuration Duration of the desired software ISP SCK clock
+ */
+void ISPTarget_ConfigureSoftwareSPI(const uint8_t SCKDuration)
+{
+ /* Configure Timer 1 for software SPI using the specified SCK duration */
+ TIMSK1 = (1 << OCIE1A);
+ TCNT1 = 0;
+ OCR1A = pgm_read_word(&TimerCompareFromSCKDuration[SCKDuration - sizeof(SPIMaskFromSCKDuration)]);
+ TCCR1A = 0;
+ TCCR1B = 0;
+}
+
+/** Sends and receives a single byte of data to and from the attached target via software SPI.
+ *
+ * \param[in] Byte Byte of data to send to the attached target
+ *
+ * \return Received byte of data from the attached target
+ */
+uint8_t ISPTarget_TransferSoftSPIByte(const uint8_t Byte)
+{
+ SoftSPI_Data = Byte;
+ SoftSPI_BitsRemaining = 8;
+
+ if (SoftSPI_Data & 0x01)
+ PORTB |= (1 << 2);
+ else
+ PORTB &= ~(1 << 2);
+
+ TCNT1 = 0;
+ TCCR1B = ((1 << WGM12) | (1 << CS11));
+ while (SoftSPI_BitsRemaining && !(TimeoutExpired));
+ TCCR1B = 0;
+
+ return SoftSPI_Data;
}
/** 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
+ * \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;
+ AUX_LINE_PORT |= AUX_LINE_MASK;
+ else
+ AUX_LINE_PORT &= ~AUX_LINE_MASK;
}
else
{
}
}
+/** 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
+ {
+ ISPTarget_SendByte(0xF0);
+ ISPTarget_SendByte(0x00);
+ ISPTarget_SendByte(0x00);
+ }
+ while ((ISPTarget_ReceiveByte() & 0x01) && !(TimeoutExpired));
+
+ return (TimeoutExpired) ? STATUS_RDY_BSY_TOUT : STATUS_CMD_OK;
+}
+
+/** 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)
+{
+ ISPTarget_SendByte(LOAD_EXTENDED_ADDRESS_CMD);
+ ISPTarget_SendByte(0x00);
+ ISPTarget_SendByte((CurrentAddress & 0x00FF0000) >> 16);
+ ISPTarget_SendByte(0x00);
+}
+
/** 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
+ * \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 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;
+ 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_PAGED_VALUE_MASK:
do
{
- SPI_SendByte(ReadMemCommand);
- SPI_SendByte(PollAddress >> 8);
- SPI_SendByte(PollAddress & 0xFF);
+ ISPTarget_SendByte(ReadMemCommand);
+ ISPTarget_SendByte(PollAddress >> 8);
+ ISPTarget_SendByte(PollAddress & 0xFF);
}
- while ((SPI_TransferByte(0x00) == PollValue) && TimeoutTicksRemaining);
+ while ((ISPTarget_TransferByte(0x00) == PollValue) && !(TimeoutExpired));
- if (!(TimeoutTicksRemaining))
+ if (TimeoutExpired)
ProgrammingStatus = STATUS_CMD_TOUT;
-
- break;
+
+ break;
case PROG_MODE_WORD_READYBUSY_MASK:
case PROG_MODE_PAGED_READYBUSY_MASK:
ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();
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);
- }
- while ((SPI_ReceiveByte() & 0x01) && TimeoutTicksRemaining);
-
- return TimeoutTicksRemaining ? STATUS_CMD_OK : STATUS_RDY_BSY_TOUT;
-}
-
-/** 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
+
projects / pub / USBasp.git / blobdiff