From de5b16909a7d9cdedc5194cf74de9ec2e59b4d60 Mon Sep 17 00:00:00 2001 From: Dean Camera Date: Thu, 29 Jul 2010 07:09:57 +0000 Subject: Added support to the AVRISP-MKII project for ISP speeds slower than 125KHz via a new software SPI driver. Added new SPI_ORDER_* data order masks to the SPI peripheral driver. --- Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c | 220 ++++++++++++++++++++++++------- 1 file changed, 171 insertions(+), 49 deletions(-) (limited to 'Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c') diff --git a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c index 2df8710eb..7c40ff847 100644 --- a/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c +++ b/Projects/AVRISP-MKII/Lib/ISP/ISPTarget.c @@ -37,7 +37,7 @@ #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. */ static uint8_t SPIMaskFromSCKDuration[] PROGMEM = { #if (F_CPU == 8000000) @@ -61,25 +61,147 @@ static uint8_t SPIMaskFromSCKDuration[] PROGMEM = #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. - * - * \return Nearest SPI prescaler mask for the given SCK frequency +/** Lookup table to convert the slower ISP speeds into a compare value for the software SPI driver. */ +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 */ +volatile uint8_t SoftSPI_Data; + +/** Number of bits left to transfer in the software SPI driver */ +volatile uint8_t SoftSPI_BitsRemaining; + + +/** ISR to handle software SPI transmission and reception */ +ISR(TIMER1_COMPA_vect, ISR_BLOCK) +{ + if (!(PINB & (1 << 1))) + { + if (SoftSPI_Data & 0x80) + PORTB |= (1 << 2); + else + PORTB &= ~(1 << 2); + } + else + { + SoftSPI_Data <<= 1; + + if (!(SoftSPI_BitsRemaining--)) + TCCR1B = 0; + + if (PINB & (1 << 3)) + SoftSPI_Data |= 0x01; + } + + PORTB ^= (1 << 1); +} + +/** Initializes the appropriate SPI driver (hardware or software, depending on the selected ISP speed) ready for + * communication with the attached target. */ -uint8_t ISPTarget_GetSPIPrescalerMask(void) +void ISPTarget_Init(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)); + + TIMSK1 = (1 << OCIE1A); + OCR1A = pgm_read_word(&TimerCompareFromSCKDuration[SCKDuration - sizeof(SPIMaskFromSCKDuration)]); + } +} + +/** 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_ShutDown(void) +{ + if (HardwareSPIMode) + { + SPI_ShutDown(); + } + else + { + DDRB &= ~((1 << 1) | (1 << 2)); + PORTB &= ~((1 << 0) | (1 << 3)); + } +} + +/** 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 && TimeoutTicksRemaining); + 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) { @@ -97,14 +219,44 @@ void ISPTarget_ChangeTargetResetLine(const bool ResetTarget) } } +/** 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 ? 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 & 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 @@ -128,11 +280,11 @@ uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode, 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) && TimeoutTicksRemaining); if (!(TimeoutTicksRemaining)) ProgrammingStatus = STATUS_CMD_TOUT; @@ -147,34 +299,4 @@ uint8_t ISPTarget_WaitForProgComplete(const uint8_t ProgrammingMode, 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 -- cgit v1.2.3