Ejemplo n.º 1
0
static int buspirate_start_spi_mode_bin(struct programmer_t *pgm)
{
	char buf[20] = { '\0' };

	/* == Switch to binmode - send 20x '\0' == */
	buspirate_send_bin(pgm, buf, sizeof(buf));

	/* Expecting 'BBIOx' reply */
	memset(buf, 0, sizeof(buf));
	buspirate_recv_bin(pgm, buf, 5);
	if (sscanf(buf, "BBIO%d", &PDATA(pgm)->binmode_version) != 1) {
		fprintf(stderr, "Binary mode not confirmed: '%s'\n", buf);
		buspirate_reset_from_binmode(pgm);
		return -1;
	}
	if (verbose)
		fprintf(stderr, "BusPirate binmode version: %d\n",
			PDATA(pgm)->binmode_version);

	pgm->flag |= BP_FLAG_IN_BINMODE;

	/* == Enter SPI mode == */
	buf[0] = 0x01;	/* Enter raw SPI mode */
	buspirate_send_bin(pgm, buf, 1);
	memset(buf, 0, sizeof(buf));
	buspirate_recv_bin(pgm, buf, 4);
	if (sscanf(buf, "SPI%d", &PDATA(pgm)->bin_spi_version) != 1) {
		fprintf(stderr, "SPI mode not confirmed: '%s'\n", buf);
		buspirate_reset_from_binmode(pgm);
		return -1;
	}
	if (verbose)
		fprintf(stderr, "BusPirate SPI version: %d\n",
			PDATA(pgm)->bin_spi_version);

	/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups/aux2, y=AUX, z=CS
	 * we want power (0x48) and all reset pins high. */
	PDATA(pgm)->current_peripherals_config  = 0x48;
	PDATA(pgm)->current_peripherals_config |= BP_RESET_CS;
	PDATA(pgm)->current_peripherals_config |= BP_RESET_AUX;
	if (buspirate_has_aux2(pgm))
		PDATA(pgm)->current_peripherals_config |= BP_RESET_AUX2;
	buspirate_expect_bin_byte(pgm, PDATA(pgm)->current_peripherals_config, 0x01);
	usleep(50000);	// sleep for 50ms after power up

	/* 01100xxx -  SPI speed
	 * xxx = 000=30kHz, 001=125kHz, 010=250kHz, 011=1MHz,
	 *       100=2MHz, 101=2.6MHz, 110=4MHz, 111=8MHz
	 * use 30kHz = 0x60 */
	buspirate_expect_bin_byte(pgm, 0x60 | PDATA(pgm)->spifreq, 0x01);

	/* 1000wxyz - SPI config, w=HiZ(0)/3.3v(1), x=CLK idle, y=CLK edge, z=SMP sample
	 * we want: 3.3V(1), idle low(0), data change on trailing edge (1),
	 *          sample in the middle of the pulse (0)
	 *       => 0b10001010 = 0x8a */
	buspirate_expect_bin_byte(pgm, 0x8A, 0x01);

	return 0;
}
Ejemplo n.º 2
0
static int buspirate_program_enable(struct programmer_t *pgm, AVRPART * p)
{
	unsigned char cmd[4];
	unsigned char res[4];

	if (pgm->flag & BP_FLAG_IN_BINMODE) {
		/* Clear configured reset pin(s): CS and/or AUX and/or AUX2 */
		PDATA(pgm)->current_peripherals_config &= ~PDATA(pgm)->reset;
		buspirate_expect_bin_byte(pgm, PDATA(pgm)->current_peripherals_config, 0x01);
	}
	else
		buspirate_expect(pgm, "{\n", "CS ENABLED", 1);

	if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
		fprintf(stderr,
			"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;
}
Ejemplo n.º 3
0
static void buspirate_powerdown(struct programmer_t *pgm)
{
	if (pgm->flag & BP_FLAG_IN_BINMODE) {
		/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups, y=AUX, z=CS
		 * we want everything off -- 0b01000000 = 0x40 */
		if (buspirate_expect_bin_byte(pgm, 0x40, 0x01))
			return;
	} else
		if (buspirate_expect(pgm, "w\n", "POWER SUPPLIES OFF", 1))
			return;

	fprintf(stderr, "%s: warning: did not get a response to PowerDown command.\n", progname);
}
Ejemplo n.º 4
0
static int buspirate_cmd_bin(struct programmer_t *pgm,
				unsigned char cmd[4],
				unsigned char res[4])
{
	/* 0001xxxx - Bulk SPI transfer, send/read 1-16 bytes (0=1byte!)
	 * we are sending 4 bytes -> 0x13 */
	if (!buspirate_expect_bin_byte(pgm, 0x13, 0x01))
		return -1;

	buspirate_send_bin(pgm, (char *)cmd, 4);
	buspirate_recv_bin(pgm, (char *)res, 4);

	return 0;
}
Ejemplo n.º 5
0
static void buspirate_powerdown(struct programmer_t *pgm)
{
	if (pgm->flag & BP_FLAG_IN_BINMODE) {
		/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups, y=AUX, z=CS
		 * we want everything off -- 0b01000000 = 0x40 */
		if (buspirate_expect_bin_byte(pgm, 0x40, 0x01))
			return;
	} else {
		if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
			if (!buspirate_expect(pgm, "g\n", "PWM disabled", 1)) {
				fprintf(stderr, "%s: warning: did not get a response to stop PWM command.\n", progname);
			}
		}
		if (buspirate_expect(pgm, "w\n", "Power supplies OFF", 1))
			return;
	}

	fprintf(stderr, "%s: warning: did not get a response to PowerDown command.\n", progname);
}
Ejemplo n.º 6
0
static int buspirate_start_spi_mode_bin(struct programmer_t *pgm)
{
	char buf[20] = { '\0' };

	/* == Switch to binmode - send 20x '\0' == */
	buspirate_send_bin(pgm, buf, sizeof(buf));

	/* Expecting 'BBIOx' reply */
	memset(buf, 0, sizeof(buf));
	buspirate_recv_bin(pgm, buf, 5);
	if (sscanf(buf, "BBIO%d", &PDATA(pgm)->binmode_version) != 1) {
		fprintf(stderr, "Binary mode not confirmed: '%s'\n", buf);
		buspirate_reset_from_binmode(pgm);
		return -1;
	}
	if (verbose)
		fprintf(stderr, "BusPirate binmode version: %d\n",
			PDATA(pgm)->binmode_version);

	pgm->flag |= BP_FLAG_IN_BINMODE;

	/* == Enter SPI mode == */
	buf[0] = 0x01;	/* Enter raw SPI mode */
	buspirate_send_bin(pgm, buf, 1);
	memset(buf, 0, sizeof(buf));
	buspirate_recv_bin(pgm, buf, 4);
	if (sscanf(buf, "SPI%d", &PDATA(pgm)->bin_spi_version) != 1) {
		fprintf(stderr, "SPI mode not confirmed: '%s'\n", buf);
		buspirate_reset_from_binmode(pgm);
		return -1;
	}
	if (verbose)
		fprintf(stderr, "BusPirate SPI version: %d\n",
			PDATA(pgm)->bin_spi_version);

	if (pgm->flag & BP_FLAG_NOPAGEDWRITE) {
		if (verbose)
			fprintf(stderr, "%s: Paged flash write disabled.\n", progname);
	} else {
		/* Check for write-then-read without !CS/CS and disable paged_write if absent: */
		strncpy(buf, "\x5\x0\x0\x0\x0", 5);
		buspirate_send_bin(pgm, buf, 5);
		buspirate_recv_bin(pgm, buf, 1);
		if (buf[0] != 0x01) {

			/* Disable paged write: */
			pgm->flag |= BP_FLAG_NOPAGEDWRITE;

			/* Return to SPI mode (0x00s have landed us back in binary bitbang mode): */
			buf[0] = 0x1;
			buspirate_send_bin(pgm, buf, 1);

			if (verbose)
				fprintf(stderr, "%s: Disabling paged flash write. (Need BusPirate firmware >=v5.10.)\n", progname);

			/* Flush serial buffer: */
			serial_drain(&pgm->fd, 0);
		} else {
			if (verbose)
				fprintf(stderr, "%s: Paged flash write enabled.\n", progname);
		}
	}

	/* 0b0100wxyz - Configure peripherals w=power, x=pull-ups/aux2, y=AUX, z=CS
	 * we want power (0x48) and all reset pins high. */
	PDATA(pgm)->current_peripherals_config  = 0x48 | PDATA(pgm)->reset;
	buspirate_expect_bin_byte(pgm, PDATA(pgm)->current_peripherals_config, 0x01);
	usleep(50000);	// sleep for 50ms after power up

	/* 01100xxx -  SPI speed
	 * xxx = 000=30kHz, 001=125kHz, 010=250kHz, 011=1MHz,
	 *       100=2MHz, 101=2.6MHz, 110=4MHz, 111=8MHz
	 * use 30kHz = 0x60 */
	buspirate_expect_bin_byte(pgm, 0x60 | PDATA(pgm)->spifreq, 0x01);

	/* 1000wxyz - SPI config, w=HiZ(0)/3.3v(1), x=CLK idle, y=CLK edge, z=SMP sample
	 * we want: 3.3V(1), idle low(0), data change on trailing edge (1),
	 *          sample in the middle of the pulse (0)
	 *       => 0b10001010 = 0x8a */
	buspirate_expect_bin_byte(pgm, 0x8A, 0x01);

	return 0;
}