-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, distribute, and sell this \r
- software and its documentation for any purpose is hereby granted\r
- without fee, provided that the above copyright notice appear in \r
- all copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting \r
- documentation, and that the name of the author not be used in \r
- advertising or publicity pertaining to distribution of the \r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * Target-related functions for the ISP Protocol decoder.\r
- */\r
-\r
-#include "ISPTarget.h"\r
-\r
-#if defined(ENABLE_ISP_PROTOCOL) || defined(__DOXYGEN__)\r
-\r
-/** Converts the given AVR Studio SCK duration parameter (set by a SET PARAM command from the host) to the nearest\r
- * possible SPI clock prescaler mask for passing to the SPI_Init() routine.\r
- *\r
- * \return Nearest SPI prescaler mask for the given SCK frequency\r
- */\r
-uint8_t ISPTarget_GetSPIPrescalerMask(void)\r
-{\r
- static const uint8_t SPIMaskFromSCKDuration[] =\r
- {\r
- #if (F_CPU == 8000000)\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_4, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI\r
- SPI_SPEED_FCPU_DIV_8, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI\r
- SPI_SPEED_FCPU_DIV_16, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI\r
- SPI_SPEED_FCPU_DIV_32, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI\r
- SPI_SPEED_FCPU_DIV_64 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI \r
- #elif (F_CPU == 16000000)\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 8MHz SPI\r
- SPI_SPEED_FCPU_DIV_4, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_8, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI\r
- SPI_SPEED_FCPU_DIV_16, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI\r
- SPI_SPEED_FCPU_DIV_32, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI\r
- SPI_SPEED_FCPU_DIV_64, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI \r
- SPI_SPEED_FCPU_DIV_128 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI\r
- #else\r
- #error No SPI prescaler masks for chosen F_CPU speed.\r
- #endif\r
- };\r
-\r
- uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);\r
-\r
- if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))\r
- SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);\r
- \r
- return SPIMaskFromSCKDuration[SCKDuration];\r
-}\r
-\r
-/** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command.\r
- * When not asserted, the line is tristated so as not to interfere with normal device operation.\r
- *\r
- * \param[in] ResetTarget Boolean true when the target should be held in reset, false otherwise\r
- */\r
-void ISPTarget_ChangeTargetResetLine(const bool ResetTarget)\r
-{\r
- if (ResetTarget)\r
- {\r
- RESET_LINE_DDR |= RESET_LINE_MASK;\r
- \r
- if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))\r
- RESET_LINE_PORT |= RESET_LINE_MASK;\r
- }\r
- else\r
- {\r
- RESET_LINE_DDR &= ~RESET_LINE_MASK;\r
- RESET_LINE_PORT &= ~RESET_LINE_MASK;\r
- }\r
-}\r
-\r
-/** Waits until the last issued target memory programming command has completed, via the check mode given and using\r
- * the given parameters.\r
- *\r
- * \param[in] ProgrammingMode Programming mode used and completion check to use, a mask of PROG_MODE_* constants\r
- * \param[in] PollAddress Memory address to poll for completion if polling check mode used\r
- * \param[in] PollValue Poll value to check against if polling check mode used\r
- * \param[in] DelayMS Milliseconds to delay before returning if delay check mode used\r
- * \param[in] ReadMemCommand Device low-level READ MEMORY command to send if value check mode used\r
- *\r
- * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or\r
- * \ref STATUS_CMD_TOUT otherwise\r
- */\r
-uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode, const uint16_t PollAddress, const uint8_t PollValue,\r
- const uint8_t DelayMS, const uint8_t ReadMemCommand)\r
-{\r
- uint8_t ProgrammingStatus = STATUS_CMD_OK;\r
-\r
- /* Determine method of Programming Complete check */\r
- switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK))\r
- {\r
- case PROG_MODE_WORD_TIMEDELAY_MASK:\r
- case PROG_MODE_PAGED_TIMEDELAY_MASK:\r
- ISPProtocol_DelayMS(DelayMS);\r
- break;\r
- case PROG_MODE_WORD_VALUE_MASK:\r
- case PROG_MODE_PAGED_VALUE_MASK:\r
- do\r
- {\r
- SPI_SendByte(ReadMemCommand);\r
- SPI_SendByte(PollAddress >> 8);\r
- SPI_SendByte(PollAddress & 0xFF);\r
- }\r
- while ((SPI_TransferByte(0x00) != PollValue) && TimeoutMSRemaining);\r
-\r
- if (!(TimeoutMSRemaining))\r
- ProgrammingStatus = STATUS_CMD_TOUT;\r
- \r
- break; \r
- case PROG_MODE_WORD_READYBUSY_MASK:\r
- case PROG_MODE_PAGED_READYBUSY_MASK:\r
- ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();\r
- break;\r
- }\r
-\r
- return ProgrammingStatus;\r
-}\r
-\r
-/** Waits until the target has completed the last operation, by continuously polling the device's\r
- * BUSY flag until it is cleared, or until the \ref TARGET_BUSY_TIMEOUT_MS timeout period has expired.\r
- *\r
- * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise\r
- */\r
-uint8_t ISPTarget_WaitWhileTargetBusy(void)\r
-{\r
- do\r
- {\r
- SPI_SendByte(0xF0);\r
- SPI_SendByte(0x00);\r
-\r
- SPI_SendByte(0x00);\r
- }\r
- while ((SPI_ReceiveByte() & 0x01) && TimeoutMSRemaining);\r
-\r
- if (!(TimeoutMSRemaining))\r
- return STATUS_RDY_BSY_TOUT;\r
- else\r
- return STATUS_CMD_OK;\r
-}\r
-\r
-/** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the\r
- * 64KB boundary. This sends the command with the correct address as indicated by the current address\r
- * pointer variable set by the host when a SET ADDRESS command is issued.\r
- */\r
-void ISPTarget_LoadExtendedAddress(void)\r
-{\r
- SPI_SendByte(0x4D);\r
- SPI_SendByte(0x00);\r
- SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16);\r
- SPI_SendByte(0x00); \r
-}\r
-\r
-#endif\r
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2021.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2021 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 disclaims 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__)
+
+/** List of hardware SPI prescaler masks for possible Atmel Studio ISP programming speeds.
+ *
+ * \hideinitializer
+ */
+static const 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
+};
+
+/** Lookup table to convert the slower ISP speeds into a compare value for the software SPI driver.
+ *
+ * \hideinitializer
+ */
+static const uint16_t TimerCompareFromSCKDuration[] PROGMEM =
+{
+ ISP_TIMER_COMP(96386), ISP_TIMER_COMP(89888), ISP_TIMER_COMP(84211), ISP_TIMER_COMP(79208), ISP_TIMER_COMP(74767),
+ ISP_TIMER_COMP(70797), ISP_TIMER_COMP(67227), ISP_TIMER_COMP(64000), ISP_TIMER_COMP(61069), ISP_TIMER_COMP(58395),
+ ISP_TIMER_COMP(55945), ISP_TIMER_COMP(51613), ISP_TIMER_COMP(49690), ISP_TIMER_COMP(47905), ISP_TIMER_COMP(46243),
+ ISP_TIMER_COMP(43244), ISP_TIMER_COMP(41885), ISP_TIMER_COMP(39409), ISP_TIMER_COMP(38278), ISP_TIMER_COMP(36200),
+ ISP_TIMER_COMP(34335), ISP_TIMER_COMP(32654), ISP_TIMER_COMP(31129), ISP_TIMER_COMP(29740), ISP_TIMER_COMP(28470),
+ ISP_TIMER_COMP(27304), ISP_TIMER_COMP(25724), ISP_TIMER_COMP(24768), ISP_TIMER_COMP(23461), ISP_TIMER_COMP(22285),
+ ISP_TIMER_COMP(21221), ISP_TIMER_COMP(20254), ISP_TIMER_COMP(19371), ISP_TIMER_COMP(18562), ISP_TIMER_COMP(17583),
+ ISP_TIMER_COMP(16914), ISP_TIMER_COMP(16097), ISP_TIMER_COMP(15356), ISP_TIMER_COMP(14520), ISP_TIMER_COMP(13914),
+ ISP_TIMER_COMP(13224), ISP_TIMER_COMP(12599), ISP_TIMER_COMP(12031), ISP_TIMER_COMP(11511), ISP_TIMER_COMP(10944),
+ ISP_TIMER_COMP(10431), ISP_TIMER_COMP(9963), ISP_TIMER_COMP(9468), ISP_TIMER_COMP(9081), ISP_TIMER_COMP(8612),
+ ISP_TIMER_COMP(8239), ISP_TIMER_COMP(7851), ISP_TIMER_COMP(7498), ISP_TIMER_COMP(7137), ISP_TIMER_COMP(6809),
+ ISP_TIMER_COMP(6478), ISP_TIMER_COMP(6178), ISP_TIMER_COMP(5879), ISP_TIMER_COMP(5607), ISP_TIMER_COMP(5359),
+ ISP_TIMER_COMP(5093), ISP_TIMER_COMP(4870), ISP_TIMER_COMP(4633), ISP_TIMER_COMP(4418), ISP_TIMER_COMP(4209),
+ ISP_TIMER_COMP(4019), ISP_TIMER_COMP(3823), ISP_TIMER_COMP(3645), ISP_TIMER_COMP(3474), ISP_TIMER_COMP(3310),
+ ISP_TIMER_COMP(3161), ISP_TIMER_COMP(3011), ISP_TIMER_COMP(2869), ISP_TIMER_COMP(2734), ISP_TIMER_COMP(2611),
+ ISP_TIMER_COMP(2484), ISP_TIMER_COMP(2369), ISP_TIMER_COMP(2257), ISP_TIMER_COMP(2152), ISP_TIMER_COMP(2052),
+ ISP_TIMER_COMP(1956), ISP_TIMER_COMP(1866), ISP_TIMER_COMP(1779), ISP_TIMER_COMP(1695), ISP_TIMER_COMP(1615),
+ ISP_TIMER_COMP(1539), ISP_TIMER_COMP(1468), ISP_TIMER_COMP(1398), ISP_TIMER_COMP(1333), ISP_TIMER_COMP(1271),
+ ISP_TIMER_COMP(1212), ISP_TIMER_COMP(1155), ISP_TIMER_COMP(1101), ISP_TIMER_COMP(1049), ISP_TIMER_COMP(1000),
+ ISP_TIMER_COMP(953), ISP_TIMER_COMP(909), ISP_TIMER_COMP(866), ISP_TIMER_COMP(826), ISP_TIMER_COMP(787),
+ ISP_TIMER_COMP(750), ISP_TIMER_COMP(715), ISP_TIMER_COMP(682), ISP_TIMER_COMP(650), ISP_TIMER_COMP(619),
+ ISP_TIMER_COMP(590), ISP_TIMER_COMP(563), ISP_TIMER_COMP(536), ISP_TIMER_COMP(511), ISP_TIMER_COMP(487),
+ ISP_TIMER_COMP(465), ISP_TIMER_COMP(443), ISP_TIMER_COMP(422), ISP_TIMER_COMP(402), ISP_TIMER_COMP(384),
+ ISP_TIMER_COMP(366), ISP_TIMER_COMP(349), ISP_TIMER_COMP(332), ISP_TIMER_COMP(317), ISP_TIMER_COMP(302),
+ ISP_TIMER_COMP(288), ISP_TIMER_COMP(274), ISP_TIMER_COMP(261), ISP_TIMER_COMP(249), ISP_TIMER_COMP(238),
+ ISP_TIMER_COMP(226), ISP_TIMER_COMP(216), ISP_TIMER_COMP(206), ISP_TIMER_COMP(196), ISP_TIMER_COMP(187),
+ ISP_TIMER_COMP(178), ISP_TIMER_COMP(170), ISP_TIMER_COMP(162), ISP_TIMER_COMP(154), ISP_TIMER_COMP(147),
+ ISP_TIMER_COMP(140), ISP_TIMER_COMP(134), ISP_TIMER_COMP(128), ISP_TIMER_COMP(122), ISP_TIMER_COMP(116),
+ ISP_TIMER_COMP(111), ISP_TIMER_COMP(105), ISP_TIMER_COMP(100), ISP_TIMER_COMP(95.4), ISP_TIMER_COMP(90.9),
+ ISP_TIMER_COMP(86.6), ISP_TIMER_COMP(82.6), ISP_TIMER_COMP(78.7), ISP_TIMER_COMP(75.0), ISP_TIMER_COMP(71.5),
+ ISP_TIMER_COMP(68.2), ISP_TIMER_COMP(65.0), ISP_TIMER_COMP(61.9), ISP_TIMER_COMP(59.0), ISP_TIMER_COMP(56.3),
+ ISP_TIMER_COMP(53.6), ISP_TIMER_COMP(51.1)
+};
+
+/** Currently selected SPI driver, either hardware (for fast ISP speeds) or software (for slower ISP speeds). */
+bool ISPTarget_HardwareSPIMode = true;
+
+/** Software SPI data register for sending and receiving */
+static volatile uint8_t ISPTarget_SoftSPI_Data;
+
+/** Number of bits left to transfer in the software SPI driver */
+static volatile uint8_t ISPTarget_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 (ISPTarget_SoftSPI_Data & (1 << 7))
+ PORTB |= (1 << 2);
+ else
+ PORTB &= ~(1 << 2);
+ }
+ else
+ {
+ ISPTarget_SoftSPI_Data <<= 1;
+
+ if (!(--ISPTarget_SoftSPI_BitsRemaining))
+ {
+ TCCR1B = 0;
+ TIFR1 = (1 << OCF1A);
+ }
+
+ if (PINB & (1 << 3))
+ ISPTarget_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))
+ {
+ ISPTarget_HardwareSPIMode = true;
+
+ SPI_Init(pgm_read_byte(&SPIMaskFromSCKDuration[SCKDuration]) | SPI_ORDER_MSB_FIRST |
+ SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING | SPI_MODE_MASTER);
+ }
+ else
+ {
+ ISPTarget_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 (ISPTarget_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)
+{
+ ISPTarget_SoftSPI_Data = Byte;
+ ISPTarget_SoftSPI_BitsRemaining = 8;
+
+ /* Set initial MOSI pin state according to the byte to be transferred */
+ if (ISPTarget_SoftSPI_Data & (1 << 7))
+ PORTB |= (1 << 2);
+ else
+ PORTB &= ~(1 << 2);
+
+ TCNT1 = 0;
+ TCCR1B = ((1 << WGM12) | (1 << CS11));
+ while (ISPTarget_SoftSPI_BitsRemaining && TimeoutTicksRemaining);
+ TCCR1B = 0;
+
+ return ISPTarget_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, \c 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_PORT &= ~AUX_LINE_MASK;
+ }
+ else
+ {
+ AUX_LINE_DDR &= ~AUX_LINE_MASK;
+ AUX_LINE_PORT &= ~AUX_LINE_MASK;
+ }
+}
+
+/** 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) && TimeoutTicksRemaining);
+
+ return (TimeoutTicksRemaining > 0) ? 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)
+{
+ ISPTarget_SendByte(LOAD_EXTENDED_ADDRESS_CMD);
+ ISPTarget_SendByte(0x00);
+ ISPTarget_SendByte(CurrentAddress >> 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 \c 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
+ {
+ ISPTarget_SendByte(ReadMemCommand);
+ ISPTarget_SendByte(PollAddress >> 8);
+ ISPTarget_SendByte(PollAddress & 0xFF);
+ }
+ while ((ISPTarget_TransferByte(0x00) == PollValue) && TimeoutTicksRemaining);
+
+ if (!(TimeoutTicksRemaining))
+ ProgrammingStatus = STATUS_CMD_TOUT;
+
+ break;
+ case PROG_MODE_WORD_READYBUSY_MASK:
+ case PROG_MODE_PAGED_READYBUSY_MASK:
+ ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();
+ break;
+ }
+
+ /* Program complete - reset timeout */
+ TimeoutTicksRemaining = COMMAND_TIMEOUT_TICKS;
+
+ return ProgrammingStatus;
+}
+
+#endif
+
projects / pub / lufa.git / blobdiff