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buspirate.c
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buspirate.c
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/*
* avrdude - A Downloader/Uploader for AVR device programmers
*
* avrdude support for The Bus Pirate - universal serial interface
*
* Copyright (C) 2009 Michal Ludvig <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* BusPirate AVR Chip
* --------- --------
* GND <-> GND
* +5V <-> Vcc
* CS <-> RESET
* MOSI <-> MOSI
* MISO <-> MISO
* SCL/CLK <-> SCK
* ( AUX <-> XTAL1 )
*
* Tested with BusPirate PTH, firmware version 2.1 programming ATmega328P
*/
/* $Id$ */
#include "ac_cfg.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if defined(WIN32NATIVE)
# include <malloc.h> /* for alloca() */
#endif
#include "avrdude.h"
#include "libavrdude.h"
#include "bitbang.h"
#include "buspirate.h"
/* ====== Private data structure ====== */
/* CS and AUX pin bitmasks in
* 0100wxyz - Configure peripherals command */
#define BP_RESET_CS 0x01
#define BP_RESET_AUX 0x02
#define BP_RESET_AUX2 0x04
#define BP_FLAG_IN_BINMODE (1<<0)
#define BP_FLAG_XPARM_FORCE_ASCII (1<<1)
#define BP_FLAG_XPARM_RESET (1<<2)
#define BP_FLAG_XPARM_SPIFREQ (1<<3)
#define BP_FLAG_NOPAGEDWRITE (1<<4)
#define BP_FLAG_XPARM_CPUFREQ (1<<5)
#define BP_FLAG_XPARM_RAWFREQ (1<<6)
#define BP_FLAG_NOPAGEDREAD (1<<7)
struct pdata
{
int binmode_version;
int submode_version;
int current_peripherals_config;
int spifreq; /* For "set speed" commands */
int cpufreq; /* (125)..4000 kHz - see buspirate manual */
int serial_recv_timeout; /* timeout in ms, default 100 */
int reset; /* See BP_RESET_* above */
unsigned char pin_dir; /* Last written pin direction for bitbang mode */
unsigned char pin_val; /* Last written pin values for bitbang mode */
int unread_bytes; /* How many bytes we expected, but ignored */
};
#define PDATA(pgm) ((struct pdata *)(pgm->cookie))
/* ====== Feature checks ====== */
static inline int
buspirate_uses_ascii(struct programmer_t *pgm)
{
return (pgm->flag & BP_FLAG_XPARM_FORCE_ASCII);
}
/* ====== Serial talker functions - binmode ====== */
static void dump_mem(const int msglvl, const unsigned char *buf, size_t len)
{
size_t i;
for (i = 0; i<len; i++) {
if (i % 8 == 0)
avrdude_message(msglvl, "\t");
avrdude_message(msglvl, "0x%02x ", buf[i]);
if (i % 8 == 3)
avrdude_message(msglvl, " ");
else if (i % 8 == 7)
avrdude_message(msglvl, "\n");
}
if (i % 8 != 7)
avrdude_message(msglvl, "\n");
}
static int buspirate_send_bin(struct programmer_t *pgm, const unsigned char *data, size_t len)
{
int rc;
avrdude_message(MSG_DEBUG, "%s: buspirate_send_bin():\n", progname);
dump_mem(MSG_DEBUG, data, len);
rc = serial_send(&pgm->fd, data, len);
return rc;
}
static int buspirate_recv_bin(struct programmer_t *pgm, unsigned char *buf, size_t len)
{
int rc;
rc = serial_recv(&pgm->fd, buf, len);
if (rc < 0)
return EOF;
avrdude_message(MSG_DEBUG, "%s: buspirate_recv_bin():\n", progname);
dump_mem(MSG_DEBUG, buf, len);
return len;
}
static int buspirate_expect_bin(struct programmer_t *pgm,
unsigned char *send_data, size_t send_len,
unsigned char *expect_data, size_t expect_len)
{
unsigned char *recv_buf = alloca(expect_len);
if ((pgm->flag & BP_FLAG_IN_BINMODE) == 0) {
avrdude_message(MSG_INFO, "BusPirate: Internal error: buspirate_send_bin() called from ascii mode\n");
return -1;
}
buspirate_send_bin(pgm, send_data, send_len);
buspirate_recv_bin(pgm, recv_buf, expect_len);
if (memcmp(expect_data, recv_buf, expect_len) != 0)
return 0;
return 1;
}
static int buspirate_expect_bin_byte(struct programmer_t *pgm,
unsigned char send_byte, unsigned char expect_byte)
{
return buspirate_expect_bin(pgm, &send_byte, 1, &expect_byte, 1);
}
/* ====== Serial talker functions - ascii mode ====== */
static int buspirate_getc(struct programmer_t *pgm)
{
int rc;
unsigned char ch = 0;
if (pgm->flag & BP_FLAG_IN_BINMODE) {
avrdude_message(MSG_INFO, "BusPirate: Internal error: buspirate_getc() called from binmode\n");
return EOF;
}
rc = serial_recv(&pgm->fd, &ch, 1);
if (rc < 0)
return EOF;
return ch;
}
static char *buspirate_readline_noexit(struct programmer_t *pgm, char *buf, size_t len)
{
char *buf_p;
long orig_serial_recv_timeout = serial_recv_timeout;
/* Static local buffer - this may come handy at times */
static char buf_local[100];
if (buf == NULL) {
buf = buf_local;
len = sizeof(buf_local);
}
buf_p = buf;
memset(buf, 0, len);
while (buf_p < (buf + len - 1)) { /* keep the very last byte == 0 */
*buf_p = buspirate_getc(pgm);
if (*buf_p == '\r')
continue;
if (*buf_p == '\n')
break;
if (*buf_p == EOF) {
*buf_p = '\0';
break;
}
buf_p++;
serial_recv_timeout = PDATA(pgm)->serial_recv_timeout;
}
serial_recv_timeout = orig_serial_recv_timeout;
avrdude_message(MSG_DEBUG, "%s: buspirate_readline(): %s%s",
progname, buf,
buf[strlen(buf) - 1] == '\n' ? "" : "\n");
if (! buf[0])
return NULL;
return buf;
}
static char *buspirate_readline(struct programmer_t *pgm, char *buf, size_t len)
{
char *ret;
ret = buspirate_readline_noexit(pgm, buf, len);
if (! ret) {
avrdude_message(MSG_INFO, "%s: buspirate_readline(): programmer is not responding\n",
progname);
return NULL;
}
return ret;
}
static int buspirate_send(struct programmer_t *pgm, const char *str)
{
int rc;
const char * readline;
avrdude_message(MSG_DEBUG, "%s: buspirate_send(): %s", progname, str);
if (pgm->flag & BP_FLAG_IN_BINMODE) {
avrdude_message(MSG_INFO, "BusPirate: Internal error: buspirate_send() called from binmode\n");
return -1;
}
rc = serial_send(&pgm->fd, (const unsigned char*)str, strlen(str));
if (rc)
return rc;
do {
readline = buspirate_readline(pgm, NULL, 0);
if (readline == NULL)
return -1;
/* keep reading until we get what we sent there */
} while (strcmp(readline, str) != 0);
/* by now we should be in sync */
return 0;
}
static int buspirate_is_prompt(const char *str)
{
int strlen_str = strlen(str);
/* Prompt ends with '>' or '> '
* all other input probably ends with '\n' */
return (str[strlen_str - 1] == '>' || str[strlen_str - 2] == '>');
}
static int buspirate_expect(struct programmer_t *pgm, char *send,
char *expect, int wait_for_prompt)
{
int got_it = 0;
size_t expect_len = strlen(expect);
char *rcvd;
buspirate_send(pgm, send);
while (1) {
rcvd = buspirate_readline(pgm, NULL, 0);
if (rcvd == NULL) {
return -1;
}
if (strncmp(rcvd, expect, expect_len) == 0) {
if (! wait_for_prompt) {
serial_drain(&pgm->fd, 0);
return 1;
} else {
got_it = 1;
}
}
if (buspirate_is_prompt(rcvd))
break;
}
return got_it;
}
/* ====== Do-nothing functions ====== */
static void buspirate_dummy_6(struct programmer_t *pgm, const char *p)
{
}
/* ====== Config / parameters handling functions ====== */
static int
buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
{
LNODEID ln;
const char *extended_param;
char reset[10];
char *preset = reset; /* for strtok() */
unsigned int spifreq;
unsigned int rawfreq;
unsigned int cpufreq;
int serial_recv_timeout;
for (ln = lfirst(extparms); ln; ln = lnext(ln)) {
extended_param = ldata(ln);
if (strcmp(extended_param, "ascii") == 0) {
pgm->flag |= BP_FLAG_XPARM_FORCE_ASCII;
continue;
}
if (sscanf(extended_param, "spifreq=%u", &spifreq) == 1) {
if (spifreq & (~0x07)) {
avrdude_message(MSG_INFO, "BusPirate: spifreq must be between 0 and 7.\n");
avrdude_message(MSG_INFO, "BusPirate: see BusPirate manual for details.\n");
return -1;
}
if (pgm->flag & BP_FLAG_XPARM_RAWFREQ) {
avrdude_message(MSG_INFO, "BusPirate: set either spifreq or rawfreq\n");
return -1;
}
pgm->flag |= BP_FLAG_XPARM_SPIFREQ;
PDATA(pgm)->spifreq = spifreq;
continue;
}
if (sscanf(extended_param, "rawfreq=%u", &rawfreq) == 1) {
if (rawfreq >= 4) {
avrdude_message(MSG_INFO, "BusPirate: rawfreq must be "
"between 0 and 3.\n");
return -1;
}
if (pgm->flag & BP_FLAG_XPARM_SPIFREQ) {
avrdude_message(MSG_INFO, "BusPirate: set either spifreq or rawfreq\n");
return -1;
}
pgm->flag |= BP_FLAG_XPARM_RAWFREQ;
PDATA(pgm)->spifreq = rawfreq;
continue;
}
if (sscanf(extended_param, "cpufreq=%u", &cpufreq) == 1) {
/* lower limit comes from 'cpufreq > 4 * spifreq', spifreq in ascii mode is 30kHz. */
if (cpufreq < 125 || cpufreq > 4000) {
avrdude_message(MSG_INFO, "BusPirate: cpufreq must be between 125 and 4000 kHz.\n");
avrdude_message(MSG_INFO, "BusPirate: see BusPirate manual for details.\n");
return -1;
}
PDATA(pgm)->cpufreq = cpufreq;
pgm->flag |= BP_FLAG_XPARM_CPUFREQ;
continue;
}
if (sscanf(extended_param, "reset=%9s", reset) == 1) {
char *resetpin;
while ((resetpin = strtok(preset, ","))) {
preset = NULL; /* for subsequent strtok() calls */
if (strcasecmp(resetpin, "cs") == 0)
PDATA(pgm)->reset |= BP_RESET_CS;
else if (strcasecmp(resetpin, "aux") == 0 || strcasecmp(reset, "aux1") == 0)
PDATA(pgm)->reset |= BP_RESET_AUX;
else if (strcasecmp(resetpin, "aux2") == 0)
PDATA(pgm)->reset |= BP_RESET_AUX2;
else {
avrdude_message(MSG_INFO, "BusPirate: reset must be either CS or AUX.\n");
return -1;
}
}
pgm->flag |= BP_FLAG_XPARM_RESET;
continue;
}
if (strcmp(extended_param, "nopagedwrite") == 0) {
pgm->flag |= BP_FLAG_NOPAGEDWRITE;
continue;
}
if (strcmp(extended_param, "nopagedread") == 0) {
pgm->flag |= BP_FLAG_NOPAGEDREAD;
continue;
}
if (sscanf(extended_param, "serial_recv_timeout=%d", &serial_recv_timeout) == 1) {
if (serial_recv_timeout < 1) {
avrdude_message(MSG_INFO, "BusPirate: serial_recv_timeout must be greater 0.\n");
return -1;
}
PDATA(pgm)->serial_recv_timeout = serial_recv_timeout;
continue;
}
avrdude_message(MSG_INFO, "BusPirate: do not understand extended param '%s'.\n", extended_param);
return -1;
}
return 0;
}
static int
buspirate_verifyconfig(struct programmer_t *pgm)
{
/* Default reset pin is CS */
if (PDATA(pgm)->reset == 0x00)
PDATA(pgm)->reset |= BP_RESET_CS;
if ((PDATA(pgm)->reset != BP_RESET_CS) && buspirate_uses_ascii(pgm)) {
avrdude_message(MSG_INFO, "BusPirate: RESET pin other than CS is not supported in ASCII mode\n");
return -1;
}
if ( ((pgm->flag & BP_FLAG_XPARM_SPIFREQ) || (pgm->flag & BP_FLAG_XPARM_RAWFREQ))
&& buspirate_uses_ascii(pgm)) {
avrdude_message(MSG_INFO, "BusPirate: SPI speed selection is not supported in ASCII mode\n");
return -1;
}
return 0;
}
/* ====== Programmer methods ======= */
static int buspirate_open(struct programmer_t *pgm, char * port)
{
union pinfo pinfo;
/* BusPirate runs at 115200 by default */
if(pgm->baudrate == 0)
pgm->baudrate = 115200;
pinfo.baud = pgm->baudrate;
strcpy(pgm->port, port);
if (serial_open(port, pinfo, &pgm->fd)==-1) {
return -1;
}
/* drain any extraneous input */
serial_drain(&pgm->fd, 0);
return 0;
}
static void buspirate_close(struct programmer_t *pgm)
{
serial_close(&pgm->fd);
pgm->fd.ifd = -1;
}
static void buspirate_reset_from_binmode(struct programmer_t *pgm)
{
unsigned char buf[10];
buf[0] = 0x00; /* BinMode: revert to raw bitbang mode */
buspirate_send_bin(pgm, buf, 1);
buspirate_recv_bin(pgm, buf, 5);
if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
/* disable pwm */
if (buspirate_expect_bin_byte(pgm, 0x13, 0x01) != 1) {
avrdude_message(MSG_INFO, "%s: warning: did not get a response to stop PWM command.\n", progname);
}
}
/* 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, 0x00) == 1) {
avrdude_message(MSG_INFO, "%s: warning: did not get a response to power off command.\n", progname);
}
buf[0] = 0x0F; /* BinMode: reset */
buspirate_send_bin(pgm, buf, 1);
/* read back all output */
memset(buf, '\0', sizeof(buf));
for (;;) {
int rc;
rc = buspirate_recv_bin(pgm, buf, sizeof(buf) - 1);
if (buspirate_is_prompt((const char*)buf)) {
pgm->flag &= ~BP_FLAG_IN_BINMODE;
break;
}
if (rc == EOF)
break;
memset(buf, '\0', sizeof(buf));
}
if (pgm->flag & BP_FLAG_IN_BINMODE) {
avrdude_message(MSG_INFO, "BusPirate reset failed. You may need to powercycle it.\n");
return;
}
avrdude_message(MSG_NOTICE, "BusPirate is back in the text mode\n");
}
static int buspirate_start_mode_bin(struct programmer_t *pgm)
{
const struct submode {
const char *name; /* Name of mode for user messages */
char enter; /* Command to enter from base binary mode */
const char *entered_format; /* Response, for "scanf" */
char config; /* Command to setup submode parameters */
} *submode;
if (pgm->flag & BP_FLAG_XPARM_RAWFREQ) {
submode = &(const struct submode){
.name = "Raw-wire",
.enter = 0x05,
.entered_format = "RAW%1d",
.config = 0x8C,
};
pgm->flag |= BP_FLAG_NOPAGEDWRITE;
pgm->flag |= BP_FLAG_NOPAGEDREAD;
} else {
submode = &(const struct submode){
.name = "SPI",
.enter = 0x01,
.entered_format = "SPI%1d",
/* 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 */
.config = 0x8A,
};
}
unsigned 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((const char*)buf, "BBIO%1d", &PDATA(pgm)->binmode_version) != 1) {
avrdude_message(MSG_INFO, "Binary mode not confirmed: '%s'\n", buf);
buspirate_reset_from_binmode(pgm);
return -1;
}
avrdude_message(MSG_NOTICE, "BusPirate binmode version: %d\n",
PDATA(pgm)->binmode_version);
pgm->flag |= BP_FLAG_IN_BINMODE;
if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
unsigned short pwm_duty;
unsigned short pwm_period;
pwm_period = 16000/(PDATA(pgm)->cpufreq) - 1; // oscillator runs at 32MHz, we don't use a prescaler
pwm_duty = pwm_period/2; // 50% duty cycle
avrdude_message(MSG_NOTICE, "Setting up PWM for cpufreq\n");
avrdude_message(MSG_DEBUG, "PWM settings: Prescaler=1, Duty Cycle=%hd, Period=%hd\n", pwm_duty, pwm_period);
buf[0] = 0x12; // pwm setup
buf[1] = 0; // prescaler 1
buf[2] = (char) ((pwm_duty >> 8) & 0xff); // duty cycle register, high byte
buf[3] = (char) pwm_duty & 0xff; // duty cycle register, low byte
buf[4] = (char) ((pwm_period >> 8) & 0xff); // period register, high byte
buf[5] = (char) pwm_period & 0xff; // period register, low byte
buspirate_send_bin(pgm, buf, 6);
buspirate_recv_bin(pgm, buf, 1);
if (buf[0] != 0x01)
avrdude_message(MSG_INFO, "cpufreq (PWM) setup failed\n");
}
/* == Set protocol sub-mode of binary mode == */
buf[0] = submode->enter;
buspirate_send_bin(pgm, buf, 1);
memset(buf, 0, sizeof(buf));
buspirate_recv_bin(pgm, buf, 4);
if (sscanf((const char*)buf, submode->entered_format, &PDATA(pgm)->submode_version) != 1) {
avrdude_message(MSG_INFO, "%s mode not confirmed: '%s'\n",
submode->name, buf);
buspirate_reset_from_binmode(pgm);
return -1;
}
avrdude_message(MSG_NOTICE, "BusPirate %s version: %d\n",
submode->name, PDATA(pgm)->submode_version);
if (pgm->flag & BP_FLAG_NOPAGEDWRITE) {
avrdude_message(MSG_NOTICE, "%s: Paged flash write disabled.\n", progname);
pgm->paged_write = NULL;
} else {
/* Check for write-then-read without !CS/CS and disable paged_write if absent: */
static const unsigned char buf2[] = {5,0,0,0,0};
buspirate_send_bin(pgm, buf2, sizeof(buf2));
buspirate_recv_bin(pgm, buf, 1);
if (buf[0] != 0x01) {
/* Disable paged write: */
pgm->flag |= BP_FLAG_NOPAGEDWRITE;
pgm->paged_write = NULL;
/* Return to SPI mode (0x00s have landed us back in binary bitbang mode): */
buf[0] = 0x1;
buspirate_send_bin(pgm, buf, 1);
avrdude_message(MSG_NOTICE, "%s: Disabling paged flash write. (Need BusPirate firmware >=v5.10.)\n", progname);
/* Flush serial buffer: */
serial_drain(&pgm->fd, 0);
} else {
avrdude_message(MSG_INFO, "%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;
if (buspirate_expect_bin_byte(pgm, PDATA(pgm)->current_peripherals_config, 0x01) < 0)
return -1;
usleep(50000); // sleep for 50ms after power up
/* 01100xxx - Set speed */
if (buspirate_expect_bin_byte(pgm, 0x60 | PDATA(pgm)->spifreq, 0x01) < 0)
return -1;
/* Submode config */
if (buspirate_expect_bin_byte(pgm, submode->config, 0x01) < 0)
return -1;
/* AVR Extended Commands - test for existence */
if (pgm->flag & BP_FLAG_NOPAGEDREAD) {
avrdude_message(MSG_NOTICE, "%s: Paged flash read disabled.\n", progname);
pgm->paged_load = NULL;
} else {
int rv = buspirate_expect_bin_byte(pgm, 0x06, 0x01);
if (rv < 0)
return -1;
if (rv) {
unsigned int ver = 0;
static const unsigned char buf2[] = {1};
buspirate_send_bin(pgm, buf2, sizeof(buf2));
buspirate_recv_bin(pgm, buf, 3);
ver = buf[1] << 8 | buf[2];
avrdude_message(MSG_NOTICE, "AVR Extended Commands version %d\n", ver);
} else {
avrdude_message(MSG_NOTICE, "AVR Extended Commands not found.\n");
pgm->flag |= BP_FLAG_NOPAGEDREAD;
pgm->paged_load = NULL;
}
}
return 0;
}
static int buspirate_start_spi_mode_ascii(struct programmer_t *pgm)
{
int spi_cmd = -1;
int cmd;
char *rcvd;
char buf[5];
char mode[11];
buspirate_send(pgm, "m\n");
while(1) {
rcvd = buspirate_readline(pgm, NULL, 0);
if (rcvd == NULL) {
return -1;
}
if (spi_cmd == -1 && sscanf(rcvd, "%2d. %10s", &cmd, mode)) {
if (strcmp(mode, "SPI") == 0)
spi_cmd = cmd;
}
if (buspirate_is_prompt(rcvd))
break;
}
if (spi_cmd == -1) {
avrdude_message(MSG_INFO, "%s: SPI mode number not found. Does your BusPirate support SPI?\n",
progname);
avrdude_message(MSG_INFO, "%s: Try powercycling your BusPirate and try again.\n",
progname);
return -1;
}
snprintf(buf, sizeof(buf), "%d\n", spi_cmd);
buspirate_send(pgm, buf);
buf[0] = '\0';
while (1) {
rcvd = buspirate_readline(pgm, NULL, 0);
if (rcvd == NULL) {
return -1;
}
if (strstr(rcvd, "Normal (H=3.3V, L=GND)")) {
/* BP firmware 2.1 defaults to Open-drain output.
* That doesn't work on my board, even with pull-up
* resistors. Select 3.3V output mode instead. */
sscanf(rcvd, " %2d.", &cmd);
snprintf(buf, sizeof(buf), "%d\n", cmd);
}
if (buspirate_is_prompt(rcvd)) {
if (strncmp(rcvd, "SPI>", 4) == 0) {
avrdude_message(MSG_INFO, "BusPirate is now configured for SPI\n");
break;
}
/* Not yet 'SPI>' prompt */
if (buf[0]) {
buspirate_send(pgm, buf);
buf[0] = '\0';
} else
buspirate_send(pgm, "\n");
}
}
return 0;
}
static void buspirate_enable(struct programmer_t *pgm)
{
static const char *reset_str = "#\n";
static const char *accept_str = "y\n";
char *rcvd;
int rc, print_banner = 0;
/* Ensure configuration is self-consistant: */
if (buspirate_verifyconfig(pgm)<0)
return; /* XXX should handle error */
/* Attempt to start binary SPI mode unless explicitly told otherwise: */
if (!buspirate_uses_ascii(pgm)) {
avrdude_message(MSG_INFO, "Attempting to initiate BusPirate binary mode...\n");
/* Send two CRs to ensure we're not in a sub-menu of the UI if we're in ASCII mode: */
buspirate_send_bin(pgm, (const unsigned char*)"\n\n", 2);
/* Clear input buffer: */
serial_drain(&pgm->fd, 0);
/* Attempt to enter binary mode: */
if (buspirate_start_mode_bin(pgm) >= 0)
return;
else
avrdude_message(MSG_INFO, "%s: Failed to start binary mode, falling back to ASCII...\n", progname);
}
avrdude_message(MSG_INFO, "Attempting to initiate BusPirate ASCII mode...\n");
/* Call buspirate_send_bin() instead of buspirate_send()
* because we don't know if BP is in text or bin mode */
rc = buspirate_send_bin(pgm, (const unsigned char*)reset_str, strlen(reset_str));
if (rc) {
avrdude_message(MSG_INFO, "BusPirate is not responding. Serial port error: %d\n", rc);
return;
}
while(1) {
rcvd = buspirate_readline_noexit(pgm, NULL, 0);
if (! rcvd) {
avrdude_message(MSG_INFO, "%s: Fatal: Programmer is not responding.\n", progname);
return;
}
if (strncmp(rcvd, "Are you sure?", 13) == 0) {
buspirate_send_bin(pgm, (const unsigned char*)accept_str, strlen(accept_str));
}
if (strncmp(rcvd, "RESET", 5) == 0) {
print_banner = 1;
continue;
}
if (buspirate_is_prompt(rcvd)) {
avrdude_message(MSG_DEBUG, "**\n");
break;
}
if (print_banner)
avrdude_message(MSG_DEBUG, "** %s", rcvd);
}
if (!(pgm->flag & BP_FLAG_IN_BINMODE)) {
avrdude_message(MSG_INFO, "BusPirate: using ASCII mode\n");
if (buspirate_start_spi_mode_ascii(pgm) < 0) {
avrdude_message(MSG_INFO, "%s: Failed to start ascii SPI mode\n", progname);
return;
}
}
}
static void buspirate_disable(struct programmer_t *pgm)
{
if (pgm->flag & BP_FLAG_IN_BINMODE) {
serial_recv_timeout = 100;
buspirate_reset_from_binmode(pgm);
} else {
buspirate_expect(pgm, "#\n", "RESET", 1);
}
}
static int buspirate_initialize(struct programmer_t *pgm, AVRPART * p)
{
pgm->powerup(pgm);
return pgm->program_enable(pgm, p);
}
static void buspirate_powerup(struct programmer_t *pgm)
{
if (pgm->flag & BP_FLAG_IN_BINMODE) {
/* Powerup in BinMode is handled in binary mode init */
return;
} else {
if (buspirate_expect(pgm, "W\n", "POWER SUPPLIES ON", 1)) {
if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
char buf[25];
int ok = 0;
snprintf(buf, sizeof(buf), "%d\n", PDATA(pgm)->cpufreq);
if (buspirate_expect(pgm, "g\n", "Frequency in kHz", 1)) {
if (buspirate_expect(pgm, buf, "Duty cycle in %", 1)) {
if (buspirate_expect(pgm, "50\n", "PWM active", 1)) {
ok = 1;
}
}
}
if(!ok) {
avrdude_message(MSG_INFO, "%s: warning: did not get a response to start PWM command.\n", progname);
}
}
return;
}
}
avrdude_message(MSG_INFO, "%s: warning: did not get a response to PowerUp command.\n", progname);
avrdude_message(MSG_INFO, "%s: warning: Trying to continue anyway...\n", progname);
}
static void buspirate_powerdown(struct programmer_t *pgm)
{
if (pgm->flag & BP_FLAG_IN_BINMODE) {
/* Powerdown in BinMode is handled in binary mode init */
return;
} else {
if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
if (!buspirate_expect(pgm, "g\n", "PWM disabled", 1)) {
avrdude_message(MSG_INFO, "%s: warning: did not get a response to stop PWM command.\n", progname);
}
}
if (buspirate_expect(pgm, "w\n", "POWER SUPPLIES OFF", 1))
return;
}
avrdude_message(MSG_INFO, "%s: warning: did not get a response to PowerDown command.\n", progname);
}
static int buspirate_cmd_bin(struct programmer_t *pgm,
const unsigned char *cmd,
unsigned char *res)
{
/* 0001xxxx - Bulk transfer, send/read 1-16 bytes (0=1byte!)
* we are sending 4 bytes -> 0x13 */
int rv = buspirate_expect_bin_byte(pgm, 0x13, 0x01);
if (rv < 0)
return -1;
if (rv == 0)
return -1;
buspirate_send_bin(pgm, cmd, 4);
buspirate_recv_bin(pgm, res, 4);
return 0;
}
static int buspirate_cmd_ascii(struct programmer_t *pgm,
const unsigned char *cmd,
unsigned char *res)
{
char buf[25];
char *rcvd;
int spi_write, spi_read, i = 0;
snprintf(buf, sizeof(buf), "0x%02x 0x%02x 0x%02x 0x%02x\n",
cmd[0], cmd[1], cmd[2], cmd[3]);
buspirate_send(pgm, buf);
while (i < 4) {
rcvd = buspirate_readline(pgm, NULL, 0);
if (rcvd == NULL) {
return -1;
}
/* WRITE: 0xAC READ: 0x04 */
if (sscanf(rcvd, "WRITE: 0x%2x READ: 0x%2x", &spi_write, &spi_read) == 2) {
res[i++] = spi_read;
}
if (buspirate_is_prompt(rcvd))
break;
}
if (i != 4) {
avrdude_message(MSG_INFO, "%s: error: SPI has not read 4 bytes back\n", progname);
return -1;
}
/* wait for prompt */
while (buspirate_getc(pgm) != '>')
/* do nothing */;
return 0;
}
static int buspirate_cmd(struct programmer_t *pgm,
const unsigned char *cmd,
unsigned char *res)
{
if (pgm->flag & BP_FLAG_IN_BINMODE)
return buspirate_cmd_bin(pgm, cmd, res);
else
return buspirate_cmd_ascii(pgm, cmd, res);
}
/* Paged load function which utilizes the AVR Extended Commands set */
static int buspirate_paged_load(
PROGRAMMER *pgm,
AVRPART *p,
AVRMEM *m,
unsigned int page_size,
unsigned int address,
unsigned int n_bytes)
{
unsigned char commandbuf[10];
unsigned char buf[275];
unsigned int addr = 0;
avrdude_message(MSG_NOTICE, "BusPirate: buspirate_paged_load(..,%s,%d,%d,%d)\n",m->desc,m->page_size,address,n_bytes);
// This should never happen, but still...
if (pgm->flag & BP_FLAG_NOPAGEDREAD) {
avrdude_message(MSG_INFO, "BusPirate: buspirate_paged_load() called while in nopagedread mode!\n");
return -1;
}
// determine what type of memory to read, only flash is supported
if (strcmp(m->desc, "flash") != 0) {
return -1;
}
// send command to read data
commandbuf[0] = 6;
commandbuf[1] = 2;
// send start address (in WORDS, not bytes!)
commandbuf[2] = (address >> 1 >> 24) & 0xff;
commandbuf[3] = (address >> 1>> 16) & 0xff;
commandbuf[4] = (address >> 1 >> 8) & 0xff;
commandbuf[5] = (address >> 1) & 0xff;
// send number of bytes to fetch (in BYTES)
commandbuf[6] = (n_bytes >> 24) & 0xff;
commandbuf[7] = (n_bytes >> 16) & 0xff;
commandbuf[8] = (n_bytes >> 8) & 0xff;
commandbuf[9] = (n_bytes) & 0xff;
buspirate_send_bin(pgm, commandbuf, 10);
buspirate_recv_bin(pgm, buf, 1);
buspirate_recv_bin(pgm, buf, 1);
if (buf[0] != 0x01) {
avrdude_message(MSG_INFO, "BusPirate: Paged Read command returned zero.\n");
return -1;
}
for (addr = 0; addr < n_bytes; addr++) {
buspirate_recv_bin(pgm, &m->buf[addr+address], 1);
}
return n_bytes;
}
/* Paged write function which utilizes the Bus Pirate's "Write then Read" binary SPI instruction */
static int buspirate_paged_write(struct programmer_t *pgm,
AVRPART *p,
AVRMEM *m,
unsigned int page_size,
unsigned int base_addr,
unsigned int n_data_bytes)
{
int page, i;
int addr = base_addr;
int n_page_writes;
int this_page_size;
unsigned char cmd_buf[4096] = {'\0'};
unsigned char send_byte, recv_byte;
if (!(pgm->flag & BP_FLAG_IN_BINMODE)) {
/* Return if we are not in binary mode. */
return -1;
}
if (pgm->flag & BP_FLAG_NOPAGEDWRITE) {
/* Return if we've nominated not to use paged writes. */
return -1;
}
if (page_size>1024) {
/* Page sizes greater than 1kB not yet supported. */
return -1;
}
if (strcmp(m->desc,"flash") != 0) {
/* Only flash memory currently supported. */
return -1;
}
/* pre-check opcodes */
if (m->op[AVR_OP_LOADPAGE_LO] == NULL) {
avrdude_message(MSG_INFO, "%s failure: %s command not defined for %s\n",
progname, "AVR_OP_LOADPAGE_LO", p->desc);