bitbang.h File Reference

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Go to the source code of this file.

Functions
int	bitbang_setpin (int fd, int pin, int value)
int	bitbang_getpin (int fd, int pin)
int	bitbang_highpulsepin (int fd, int pin)
void	bitbang_delay (unsigned int us)
int	bitbang_check_prerequisites (PROGRAMMER *pgm)
int	bitbang_rdy_led (PROGRAMMER *pgm, int value)
int	bitbang_err_led (PROGRAMMER *pgm, int value)
int	bitbang_pgm_led (PROGRAMMER *pgm, int value)
int	bitbang_vfy_led (PROGRAMMER *pgm, int value)
int	bitbang_cmd (PROGRAMMER *pgm, const unsigned char *cmd, unsigned char *res)
int	bitbang_cmd_tpi (PROGRAMMER *pgm, const unsigned char *cmd, int cmd_len, unsigned char *res, int res_len)
int	bitbang_spi (PROGRAMMER *pgm, const unsigned char *cmd, unsigned char *res, int count)
int	bitbang_chip_erase (PROGRAMMER *pgm, AVRPART *p)
int	bitbang_program_enable (PROGRAMMER *pgm, AVRPART *p)
void	bitbang_powerup (PROGRAMMER *pgm)
void	bitbang_powerdown (PROGRAMMER *pgm)
int	bitbang_initialize (PROGRAMMER *pgm, AVRPART *p)
void	bitbang_disable (PROGRAMMER *pgm)
void	bitbang_enable (PROGRAMMER *pgm)

Function Documentation

bitbang_check_prerequisites()

int bitbang_check_prerequisites

(

PROGRAMMER *

pgm

)

{
 
  if (verify_pin_assigned(pgm, PIN_AVR_RESET, "AVR RESET") < 0)
    return -1;
  if (verify_pin_assigned(pgm, PIN_AVR_SCK,   "AVR SCK") < 0)
    return -1;
  if (verify_pin_assigned(pgm, PIN_AVR_MISO,  "AVR MISO") < 0)
    return -1;
  if (verify_pin_assigned(pgm, PIN_AVR_MOSI,  "AVR MOSI") < 0)
    return -1;
 
  if (pgm->cmd == NULL) {
    avrdude_message(MSG_INFO, "%s: error: no cmd() method defined for bitbang programmer\n",
            progname);
    return -1;
  }
  return 0;
}

References avrdude_message(), programmer_t::cmd, MSG_INFO, pgm, PIN_AVR_MISO, PIN_AVR_MOSI, PIN_AVR_RESET, PIN_AVR_SCK, progname, and verify_pin_assigned().

Referenced by buspirate_bb_enable(), and serbb_open().

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bitbang_chip_erase()

int bitbang_chip_erase	(	PROGRAMMER *	pgm,
		AVRPART *	p
	)

{
  unsigned char cmd[4];
  unsigned char res[4];
  AVRMEM *mem;
 
  if (p->flags & AVRPART_HAS_TPI) {
    pgm->pgm_led(pgm, ON);
 
    while (avr_tpi_poll_nvmbsy(pgm));
 
    /* NVMCMD <- CHIP_ERASE */
    bitbang_tpi_tx(pgm, TPI_CMD_SOUT | TPI_SIO_ADDR(TPI_IOREG_NVMCMD));
    bitbang_tpi_tx(pgm, TPI_NVMCMD_CHIP_ERASE); /* CHIP_ERASE */
 
    /* Set Pointer Register */
    mem = avr_locate_mem(p, "flash");
    if (mem == NULL) {
      avrdude_message(MSG_INFO, "No flash memory to erase for part %s\n",
          p->desc);
      return -1;
    }
    bitbang_tpi_tx(pgm, TPI_CMD_SSTPR | 0);
    bitbang_tpi_tx(pgm, (mem->offset & 0xFF) | 1);  /* high byte */
    bitbang_tpi_tx(pgm, TPI_CMD_SSTPR | 1);
    bitbang_tpi_tx(pgm, (mem->offset >> 8) & 0xFF);
 
    /* write dummy value to start erase */
    bitbang_tpi_tx(pgm, TPI_CMD_SST);
    bitbang_tpi_tx(pgm, 0xFF);
 
    while (avr_tpi_poll_nvmbsy(pgm));
 
    pgm->pgm_led(pgm, OFF);
 
    return 0;
  }
 
  if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
    avrdude_message(MSG_INFO, "chip erase instruction not defined for part \"%s\"\n",
            p->desc);
    return -1;
  }
 
  pgm->pgm_led(pgm, ON);
 
  memset(cmd, 0, sizeof(cmd));
 
  avr_set_bits(p->op[AVR_OP_CHIP_ERASE], cmd);
  pgm->cmd(pgm, cmd, res);
  usleep(p->chip_erase_delay);
  pgm->initialize(pgm, p);
 
  pgm->pgm_led(pgm, OFF);
 
  return 0;
}

References avr_locate_mem(), AVR_OP_CHIP_ERASE, avr_set_bits(), avr_tpi_poll_nvmbsy(), avrdude_message(), AVRPART_HAS_TPI, bitbang_tpi_tx(), avrpart::chip_erase_delay, programmer_t::cmd, cmd, avrpart::desc, avrpart::flags, programmer_t::initialize, MSG_INFO, OFF, avrmem::offset, ON, avrpart::op, pgm, programmer_t::pgm_led, TPI_CMD_SOUT, TPI_CMD_SST, TPI_CMD_SSTPR, TPI_IOREG_NVMCMD, TPI_NVMCMD_CHIP_ERASE, TPI_SIO_ADDR, and usleep().

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_cmd()

int bitbang_cmd	(	PROGRAMMER *	pgm,
		const unsigned char *	cmd,
		unsigned char *	res
	)

{
  int i;
 
  for (i=0; i<4; i++) {
    res[i] = bitbang_txrx(pgm, cmd[i]);
  }
 
    if(verbose >= 2)
  {
        avrdude_message(MSG_NOTICE2, "bitbang_cmd(): [ ");
        for(i = 0; i < 4; i++)
            avrdude_message(MSG_NOTICE2, "%02X ", cmd[i]);
        avrdude_message(MSG_NOTICE2, "] [ ");
        for(i = 0; i < 4; i++)
    {
            avrdude_message(MSG_NOTICE2, "%02X ", res[i]);
    }
        avrdude_message(MSG_NOTICE2, "]\n");
  }
 
  return 0;
}

References avrdude_message(), bitbang_txrx(), cmd, MSG_NOTICE2, pgm, and verbose.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_cmd_tpi()

int bitbang_cmd_tpi	(	PROGRAMMER *	pgm,
		const unsigned char *	cmd,
		int	cmd_len,
		unsigned char *	res,
		int	res_len
	)

{
  int i, r;
 
  pgm->pgm_led(pgm, ON);
 
  for (i=0; i<cmd_len; i++) {
    bitbang_tpi_tx(pgm, cmd[i]);
  }
 
  r = 0;
  for (i=0; i<res_len; i++) {
    r = bitbang_tpi_rx(pgm);
    if (r == -1)
      break;
    res[i] = r;
  }
 
  if(verbose >= 2)
  {
    avrdude_message(MSG_NOTICE2, "bitbang_cmd_tpi(): [ ");
    for(i = 0; i < cmd_len; i++)
      avrdude_message(MSG_NOTICE2, "%02X ", cmd[i]);
    avrdude_message(MSG_NOTICE2, "] [ ");
    for(i = 0; i < res_len; i++)
    {
      avrdude_message(MSG_NOTICE2, "%02X ", res[i]);
    }
    avrdude_message(MSG_NOTICE2, "]\n");
  }
 
  pgm->pgm_led(pgm, OFF);
  if (r == -1)
    return -1;
  return 0;
}

References avrdude_message(), bitbang_tpi_rx(), bitbang_tpi_tx(), cmd, MSG_NOTICE2, OFF, ON, pgm, programmer_t::pgm_led, and verbose.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_delay()

void bitbang_delay

(

unsigned int

us

)

{
#if defined(WIN32NATIVE)
  LARGE_INTEGER countNow, countEnd;
 
  if (has_perfcount)
  {
    QueryPerformanceCounter(&countNow);
    countEnd.QuadPart = countNow.QuadPart + freq.QuadPart * us / 1000000ll;
 
    while (countNow.QuadPart < countEnd.QuadPart)
      QueryPerformanceCounter(&countNow);
  }
  else /* no performance counters -- run normal uncalibrated delay */
  {
#endif  /* WIN32NATIVE */
  volatile unsigned int del = us * delay_decrement;
 
  while (del > 0)
    del--;
#if defined(WIN32NATIVE)
  }
#endif /* WIN32NATIVE */
}

References delay_decrement.

Referenced by serbb_setpin().

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bitbang_disable()

void bitbang_disable

(

PROGRAMMER *

pgm

)

bitbang_enable()

void bitbang_enable

(

PROGRAMMER *

pgm

)

bitbang_err_led()

int bitbang_err_led	(	PROGRAMMER *	pgm,
		int	value
	)

{
  pgm->setpin(pgm, PIN_LED_ERR, !value);
  return 0;
}

References pgm, PIN_LED_ERR, and programmer_t::setpin.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_getpin()

int bitbang_getpin	(	int	fd,
		int	pin
	)

bitbang_highpulsepin()

int bitbang_highpulsepin	(	int	fd,
		int	pin
	)

bitbang_initialize()

int bitbang_initialize	(	PROGRAMMER *	pgm,
		AVRPART *	p
	)

{
  int rc;
  int tries;
  int i;
 
  bitbang_calibrate_delay();
 
  pgm->powerup(pgm);
  usleep(20000);
 
  /* TPIDATA is a single line, so MISO & MOSI should be connected */
  if (p->flags & AVRPART_HAS_TPI) {
    /* make sure cmd_tpi() is defined */
    if (pgm->cmd_tpi == NULL) {
      avrdude_message(MSG_INFO, "%s: Error: %s programmer does not support TPI\n",
          progname, pgm->type);
      return -1;
    }
 
  /* bring RESET high first */
    pgm->setpin(pgm, PIN_AVR_RESET, 1);
  usleep(1000);
 
    avrdude_message(MSG_NOTICE2, "doing MOSI-MISO link check\n");
 
    pgm->setpin(pgm, PIN_AVR_MOSI, 0);
    if (pgm->getpin(pgm, PIN_AVR_MISO) != 0) {
      avrdude_message(MSG_INFO, "MOSI->MISO 0 failed\n");
      return -1;
    }
    pgm->setpin(pgm, PIN_AVR_MOSI, 1);
    if (pgm->getpin(pgm, PIN_AVR_MISO) != 1) {
      avrdude_message(MSG_INFO, "MOSI->MISO 1 failed\n");
      return -1;
    }
 
    avrdude_message(MSG_NOTICE2, "MOSI-MISO link present\n");
  }
 
  pgm->setpin(pgm, PIN_AVR_SCK, 0);
  pgm->setpin(pgm, PIN_AVR_RESET, 0);
  usleep(20000);
 
  if (p->flags & AVRPART_HAS_TPI) {
    /* keep TPIDATA high for 16 clock cycles */
    pgm->setpin(pgm, PIN_AVR_MOSI, 1);
    for (i = 0; i < 16; i++)
      pgm->highpulsepin(pgm, PIN_AVR_SCK);
 
    /* remove extra guard timing bits */
    bitbang_tpi_tx(pgm, TPI_CMD_SSTCS | TPI_REG_TPIPCR);
    bitbang_tpi_tx(pgm, 0x7);
 
    /* read TPI ident reg */
    bitbang_tpi_tx(pgm, TPI_CMD_SLDCS | TPI_REG_TPIIR);
    rc = bitbang_tpi_rx(pgm);
    if (rc != 0x80) {
      avrdude_message(MSG_INFO, "TPIIR not correct\n");
      return -1;
    }
  } else {
    pgm->highpulsepin(pgm, PIN_AVR_RESET);
  }
 
  usleep(20000); /* 20 ms XXX should be a per-chip parameter */
 
  /*
   * Enable programming mode.  If we are programming an AT90S1200, we
   * can only issue the command and hope it worked.  If we are using
   * one of the other chips, the chip will echo 0x53 when issuing the
   * third byte of the command.  In this case, try up to 32 times in
   * order to possibly get back into sync with the chip if we are out
   * of sync.
   */
  if (p->flags & AVRPART_IS_AT90S1200) {
    pgm->program_enable(pgm, p);
  }
  else {
    tries = 0;
    do {
      rc = pgm->program_enable(pgm, p);
      if ((rc == 0)||(rc == -1))
        break;
      pgm->highpulsepin(pgm, p->retry_pulse/*PIN_AVR_SCK*/);
      tries++;
    } while (tries < 65);
 
    /*
     * can't sync with the device, maybe it's not attached?
     */
    if (rc) {
      avrdude_message(MSG_INFO, "%s: AVR device not responding\n", progname);
      return -1;
    }
  }
 
  return 0;
}

References avrdude_message(), AVRPART_HAS_TPI, AVRPART_IS_AT90S1200, bitbang_calibrate_delay(), bitbang_tpi_rx(), bitbang_tpi_tx(), programmer_t::cmd_tpi, avrpart::flags, programmer_t::getpin, programmer_t::highpulsepin, MSG_INFO, MSG_NOTICE2, pgm, PIN_AVR_MISO, PIN_AVR_MOSI, PIN_AVR_RESET, PIN_AVR_SCK, programmer_t::powerup, progname, programmer_t::program_enable, avrpart::retry_pulse, programmer_t::setpin, TPI_CMD_SLDCS, TPI_CMD_SSTCS, TPI_REG_TPIIR, TPI_REG_TPIPCR, programmer_t::type, and usleep().

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_pgm_led()

int bitbang_pgm_led	(	PROGRAMMER *	pgm,
		int	value
	)

{
  pgm->setpin(pgm, PIN_LED_PGM, !value);
  return 0;
}

References pgm, PIN_LED_PGM, and programmer_t::setpin.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_powerdown()

void bitbang_powerdown

(

PROGRAMMER *

pgm

)

bitbang_powerup()

void bitbang_powerup

(

PROGRAMMER *

pgm

)

bitbang_program_enable()

int bitbang_program_enable	(	PROGRAMMER *	pgm,
		AVRPART *	p
	)

{
  unsigned char cmd[4];
  unsigned char res[4];
  int i;
 
  if (p->flags & AVRPART_HAS_TPI) {
    /* enable NVM programming */
    bitbang_tpi_tx(pgm, TPI_CMD_SKEY);
    for (i = sizeof(tpi_skey) - 1; i >= 0; i--)
      bitbang_tpi_tx(pgm, tpi_skey[i]);
 
    /* check NVMEN bit */
    bitbang_tpi_tx(pgm, TPI_CMD_SLDCS | TPI_REG_TPISR);
    i = bitbang_tpi_rx(pgm);
    return (i != -1 && (i & TPI_REG_TPISR_NVMEN)) ? 0 : -2;
  }
 
  if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
    avrdude_message(MSG_INFO, "program enable instruction not defined for part \"%s\"\n",
            p->desc);
    return -1;
  }
 
  memset(cmd, 0, sizeof(cmd));
  avr_set_bits(p->op[AVR_OP_PGM_ENABLE], cmd);
  pgm->cmd(pgm, cmd, res);
 
  if (res[2] != cmd[1])
    return -2;
 
  return 0;
}

References AVR_OP_PGM_ENABLE, avr_set_bits(), avrdude_message(), AVRPART_HAS_TPI, bitbang_tpi_rx(), bitbang_tpi_tx(), programmer_t::cmd, cmd, avrpart::desc, avrpart::flags, MSG_INFO, avrpart::op, pgm, TPI_CMD_SKEY, TPI_CMD_SLDCS, TPI_REG_TPISR, TPI_REG_TPISR_NVMEN, and tpi_skey.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_rdy_led()

int bitbang_rdy_led	(	PROGRAMMER *	pgm,
		int	value
	)

{
  pgm->setpin(pgm, PIN_LED_RDY, !value);
  return 0;
}

References pgm, PIN_LED_RDY, and programmer_t::setpin.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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bitbang_setpin()

int bitbang_setpin	(	int	fd,
		int	pin,
		int	value
	)

bitbang_spi()

int bitbang_spi	(	PROGRAMMER *	pgm,
		const unsigned char *	cmd,
		unsigned char *	res,
		int	count
	)

{
  int i;
 
  pgm->setpin(pgm, PIN_LED_PGM, 0);
 
  for (i=0; i<count; i++) {
    res[i] = bitbang_txrx(pgm, cmd[i]);
  }
 
  pgm->setpin(pgm, PIN_LED_PGM, 1);
 
  if(verbose >= 2)
  {
        avrdude_message(MSG_NOTICE2, "bitbang_cmd(): [ ");
        for(i = 0; i < count; i++)
            avrdude_message(MSG_NOTICE2, "%02X ", cmd[i]);
        avrdude_message(MSG_NOTICE2, "] [ ");
        for(i = 0; i < count; i++)
    {
            avrdude_message(MSG_NOTICE2, "%02X ", res[i]);
    }
        avrdude_message(MSG_NOTICE2, "]\n");
  }
 
  return 0;
}

References avrdude_message(), bitbang_txrx(), cmd, MSG_NOTICE2, pgm, PIN_LED_PGM, programmer_t::setpin, and verbose.

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bitbang_vfy_led()

int bitbang_vfy_led	(	PROGRAMMER *	pgm,
		int	value
	)

{
  pgm->setpin(pgm, PIN_LED_VFY, !value);
  return 0;
}

References pgm, PIN_LED_VFY, and programmer_t::setpin.

Referenced by buspirate_bb_initpgm(), and serbb_initpgm().

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