1 /***************************************************************************
2 * Copyright (C) 2010 by Michal Demin *
3 * based on usbprog.c and arm-jtag-ew.c *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
25 #include <jtag/interface.h>
26 #include <jtag/commands.h>
30 #include <sys/ioctl.h>
33 /*#define DEBUG_SERIAL */
34 static int buspirate_execute_queue(void);
35 static int buspirate_speed(int speed);
36 static int buspirate_khz(int khz, int *jtag_speed);
37 static int buspirate_init(void);
38 static int buspirate_quit(void);
40 static void buspirate_end_state(tap_state_t state);
41 static void buspirate_state_move(void);
42 static void buspirate_path_move(int num_states, tap_state_t *path);
43 static void buspirate_runtest(int num_cycles);
44 static void buspirate_scan(bool ir_scan, enum scan_type type,
45 uint8_t *buffer, int scan_size, struct scan_command *command);
48 #define CMD_UNKOWN 0x00
49 #define CMD_PORT_MODE 0x01
50 #define CMD_FEATURE 0x02
51 #define CMD_READ_ADCS 0x03
52 /*#define CMD_TAP_SHIFT 0x04 // old protocol */
53 #define CMD_TAP_SHIFT 0x05
54 #define CMD_ENTER_OOCD 0x06
55 #define CMD_UART_SPEED 0x07
56 #define CMD_JTAG_SPEED 0x08
60 MODE_JTAG = 1, /* push-pull outputs */
61 MODE_JTAG_OD = 2, /* open-drain outputs */
83 static int buspirate_fd = -1;
84 static int buspirate_pinmode = MODE_JTAG_OD;
85 static int buspirate_baudrate = SERIAL_NORMAL;
86 static int buspirate_vreg;
87 static int buspirate_pullup;
88 static char *buspirate_port;
92 static void buspirate_tap_init(void);
93 static int buspirate_tap_execute(void);
94 static void buspirate_tap_append(int tms, int tdi);
95 static void buspirate_tap_append_scan(int length, uint8_t *buffer,
96 struct scan_command *command);
97 static void buspirate_tap_make_space(int scan, int bits);
99 static void buspirate_reset(int trst, int srst);
101 /* low level interface */
102 static void buspirate_jtag_reset(int);
103 static void buspirate_jtag_enable(int);
104 static unsigned char buspirate_jtag_command(int, char *, int);
105 static void buspirate_jtag_set_speed(int, char);
106 static void buspirate_jtag_set_mode(int, char);
107 static void buspirate_jtag_set_feature(int, char, char);
108 static void buspirate_jtag_get_adcs(int);
110 /* low level HW communication interface */
111 static int buspirate_serial_open(char *port);
112 static int buspirate_serial_setspeed(int fd, char speed);
113 static int buspirate_serial_write(int fd, char *buf, int size);
114 static int buspirate_serial_read(int fd, char *buf, int size);
115 static void buspirate_serial_close(int fd);
116 static void buspirate_print_buffer(char *buf, int size);
118 static int buspirate_speed(int speed)
121 LOG_INFO("Want to set speed to %dkHz, but not implemented yet", speed);
125 static int buspirate_khz(int khz, int *jtag_speed)
131 static int buspirate_execute_queue(void)
133 /* currently processed command */
134 struct jtag_command *cmd = jtag_command_queue;
142 DEBUG_JTAG_IO("runtest %i cycles, end in %s",
143 cmd->cmd.runtest->num_cycles,
144 tap_state_name(cmd->cmd.runtest
146 buspirate_end_state(cmd->cmd.runtest
148 buspirate_runtest(cmd->cmd.runtest
152 DEBUG_JTAG_IO("statemove end in %s",
153 tap_state_name(cmd->cmd.statemove
155 buspirate_end_state(cmd->cmd.statemove
157 buspirate_state_move();
160 DEBUG_JTAG_IO("pathmove: %i states, end in %s",
161 cmd->cmd.pathmove->num_states,
162 tap_state_name(cmd->cmd.pathmove
163 ->path[cmd->cmd.pathmove
165 buspirate_path_move(cmd->cmd.pathmove
167 cmd->cmd.pathmove->path);
170 DEBUG_JTAG_IO("scan end in %s",
171 tap_state_name(cmd->cmd.scan
174 buspirate_end_state(cmd->cmd.scan
177 scan_size = jtag_build_buffer(cmd->cmd.scan,
179 type = jtag_scan_type(cmd->cmd.scan);
180 buspirate_scan(cmd->cmd.scan->ir_scan, type,
181 buffer, scan_size, cmd->cmd.scan);
185 DEBUG_JTAG_IO("reset trst: %i srst %i",
186 cmd->cmd.reset->trst, cmd->cmd.reset->srst);
188 /* flush buffers, so we can reset */
189 buspirate_tap_execute();
191 if (cmd->cmd.reset->trst == 1)
192 tap_set_state(TAP_RESET);
193 buspirate_reset(cmd->cmd.reset->trst,
194 cmd->cmd.reset->srst);
197 DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
198 buspirate_tap_execute();
199 jtag_sleep(cmd->cmd.sleep->us);
202 LOG_ERROR("BUG: unknown JTAG command type encountered");
209 return buspirate_tap_execute();
212 static int buspirate_init(void)
214 if (buspirate_port == NULL) {
215 LOG_ERROR("You need to specify port !");
216 return ERROR_JTAG_INIT_FAILED;
219 buspirate_fd = buspirate_serial_open(buspirate_port);
220 if (buspirate_fd == -1) {
221 LOG_ERROR("Could not open serial port.");
222 return ERROR_JTAG_INIT_FAILED;
225 buspirate_serial_setspeed(buspirate_fd, SERIAL_NORMAL);
227 buspirate_jtag_enable(buspirate_fd);
229 if (buspirate_baudrate != SERIAL_NORMAL)
230 buspirate_jtag_set_speed(buspirate_fd, SERIAL_FAST);
232 LOG_INFO("Buspirate Interface ready!");
234 buspirate_tap_init();
235 buspirate_jtag_set_mode(buspirate_fd, buspirate_pinmode);
236 buspirate_jtag_set_feature(buspirate_fd, FEATURE_VREG,
237 (buspirate_vreg == 1) ? ACTION_ENABLE : ACTION_DISABLE);
238 buspirate_jtag_set_feature(buspirate_fd, FEATURE_PULLUP,
239 (buspirate_pullup == 1) ? ACTION_ENABLE : ACTION_DISABLE);
240 buspirate_reset(0, 0);
245 static int buspirate_quit(void)
247 LOG_INFO("Shuting down buspirate ");
248 buspirate_jtag_set_mode(buspirate_fd, MODE_HIZ);
250 buspirate_jtag_set_speed(buspirate_fd, SERIAL_NORMAL);
251 buspirate_jtag_reset(buspirate_fd);
253 buspirate_serial_close(buspirate_fd);
255 if (buspirate_port) {
256 free(buspirate_port);
257 buspirate_port = NULL;
262 /* openocd command interface */
263 COMMAND_HANDLER(buspirate_handle_adc_command)
265 if (buspirate_fd == -1)
268 /* send the command */
269 buspirate_jtag_get_adcs(buspirate_fd);
275 COMMAND_HANDLER(buspirate_handle_vreg_command)
278 LOG_ERROR("usage: buspirate_vreg <1|0>");
282 if (atoi(CMD_ARGV[0]) == 1)
284 else if (atoi(CMD_ARGV[0]) == 0)
287 LOG_ERROR("usage: buspirate_vreg <1|0>");
293 COMMAND_HANDLER(buspirate_handle_pullup_command)
296 LOG_ERROR("usage: buspirate_pullup <1|0>");
300 if (atoi(CMD_ARGV[0]) == 1)
301 buspirate_pullup = 1;
302 else if (atoi(CMD_ARGV[0]) == 0)
303 buspirate_pullup = 0;
305 LOG_ERROR("usage: buspirate_pullup <1|0>");
311 COMMAND_HANDLER(buspirate_handle_led_command)
314 LOG_ERROR("usage: buspirate_led <1|0>");
318 if (atoi(CMD_ARGV[0]) == 1) {
320 buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
322 } else if (atoi(CMD_ARGV[0]) == 0) {
324 buspirate_jtag_set_feature(buspirate_fd, FEATURE_LED,
327 LOG_ERROR("usage: buspirate_led <1|0>");
334 COMMAND_HANDLER(buspirate_handle_mode_command)
337 LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
341 if (CMD_ARGV[0][0] == 'n')
342 buspirate_pinmode = MODE_JTAG;
343 else if (CMD_ARGV[0][0] == 'o')
344 buspirate_pinmode = MODE_JTAG_OD;
346 LOG_ERROR("usage: buspirate_mode <normal|open-drain>");
352 COMMAND_HANDLER(buspirate_handle_speed_command)
355 LOG_ERROR("usage: buspirate_speed <normal|fast>");
359 if (CMD_ARGV[0][0] == 'n')
360 buspirate_baudrate = SERIAL_NORMAL;
361 else if (CMD_ARGV[0][0] == 'f')
362 buspirate_baudrate = SERIAL_FAST;
364 LOG_ERROR("usage: buspirate_speed <normal|fast>");
370 COMMAND_HANDLER(buspirate_handle_port_command)
373 LOG_ERROR("usage: buspirate_port /dev/ttyUSB0");
377 if (buspirate_port == NULL)
378 buspirate_port = strdup(CMD_ARGV[0]);
384 static const struct command_registration buspirate_command_handlers[] = {
386 .name = "buspirate_adc",
387 .handler = &buspirate_handle_adc_command,
388 .mode = COMMAND_EXEC,
389 .help = "reads voltages on adc pins",
392 .name = "buspirate_vreg",
393 .handler = &buspirate_handle_vreg_command,
394 .mode = COMMAND_CONFIG,
395 .help = "changes the state of voltage regulators",
398 .name = "buspirate_pullup",
399 .handler = &buspirate_handle_pullup_command,
400 .mode = COMMAND_CONFIG,
401 .help = "changes the state of pullup",
404 .name = "buspirate_led",
405 .handler = &buspirate_handle_led_command,
406 .mode = COMMAND_EXEC,
407 .help = "changes the state of led",
410 .name = "buspirate_speed",
411 .handler = &buspirate_handle_speed_command,
412 .mode = COMMAND_CONFIG,
413 .help = "speed of the interface",
416 .name = "buspirate_mode",
417 .handler = &buspirate_handle_mode_command,
418 .mode = COMMAND_CONFIG,
419 .help = "pin mode of the interface",
422 .name = "buspirate_port",
423 .handler = &buspirate_handle_port_command,
424 .mode = COMMAND_CONFIG,
425 .help = "name of the serial port to open",
427 COMMAND_REGISTRATION_DONE
430 struct jtag_interface buspirate_interface = {
432 .execute_queue = buspirate_execute_queue,
433 .speed = buspirate_speed,
434 .khz = buspirate_khz,
435 .commands = buspirate_command_handlers,
436 .init = buspirate_init,
437 .quit = buspirate_quit
440 /*************** jtag execute commands **********************/
441 static void buspirate_end_state(tap_state_t state)
443 if (tap_is_state_stable(state))
444 tap_set_end_state(state);
446 LOG_ERROR("BUG: %i is not a valid end state", state);
451 static void buspirate_state_move(void)
454 uint8_t tms_scan = tap_get_tms_path(tap_get_state(),
455 tap_get_end_state());
456 int tms_count = tap_get_tms_path_len(tap_get_state(),
457 tap_get_end_state());
459 for (i = 0; i < tms_count; i++) {
460 tms = (tms_scan >> i) & 1;
461 buspirate_tap_append(tms, 0);
464 tap_set_state(tap_get_end_state());
467 static void buspirate_path_move(int num_states, tap_state_t *path)
471 for (i = 0; i < num_states; i++) {
472 if (tap_state_transition(tap_get_state(), false) == path[i]) {
473 buspirate_tap_append(0, 0);
474 } else if (tap_state_transition(tap_get_state(), true)
476 buspirate_tap_append(1, 0);
478 LOG_ERROR("BUG: %s -> %s isn't a valid "
480 tap_state_name(tap_get_state()),
481 tap_state_name(path[i]));
485 tap_set_state(path[i]);
488 tap_set_end_state(tap_get_state());
491 static void buspirate_runtest(int num_cycles)
495 tap_state_t saved_end_state = tap_get_end_state();
497 /* only do a state_move when we're not already in IDLE */
498 if (tap_get_state() != TAP_IDLE) {
499 buspirate_end_state(TAP_IDLE);
500 buspirate_state_move();
503 for (i = 0; i < num_cycles; i++)
504 buspirate_tap_append(0, 0);
506 DEBUG_JTAG_IO("runtest: cur_state %s end_state %s",
507 tap_state_name(tap_get_state()),
508 tap_state_name(tap_get_end_state()));
510 /* finish in end_state */
511 buspirate_end_state(saved_end_state);
512 if (tap_get_state() != tap_get_end_state())
513 buspirate_state_move();
516 static void buspirate_scan(bool ir_scan, enum scan_type type,
517 uint8_t *buffer, int scan_size, struct scan_command *command)
519 tap_state_t saved_end_state;
521 buspirate_tap_make_space(1, scan_size+8);
522 /* is 8 correct ? (2 moves = 16) */
524 saved_end_state = tap_get_end_state();
526 buspirate_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
527 buspirate_state_move();
529 buspirate_tap_append_scan(scan_size, buffer, command);
532 buspirate_tap_append(0, 0);
534 /* restore the saved state */
535 buspirate_end_state(saved_end_state);
536 tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
538 if (tap_get_state() != tap_get_end_state())
539 buspirate_state_move();
543 /************************* TAP related stuff **********/
545 #define BUSPIRATE_BUFFER_SIZE 1024
546 #define BUSPIRATE_MAX_PENDING_SCANS 32
548 static char tms_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
549 static char tdi_chain[BUSPIRATE_BUFFER_SIZE]; /* send */
550 static int tap_chain_index;
552 struct pending_scan_result /* this was stolen from arm-jtag-ew */
554 int first; /* First bit position in tdo_buffer to read */
555 int length; /* Number of bits to read */
556 struct scan_command *command; /* Corresponding scan command */
560 static struct pending_scan_result
561 tap_pending_scans[BUSPIRATE_MAX_PENDING_SCANS];
562 static int tap_pending_scans_num;
564 static void buspirate_tap_init(void)
567 tap_pending_scans_num = 0;
570 static int buspirate_tap_execute(void)
579 if (tap_chain_index <= 0)
582 LOG_DEBUG("executing tap num bits = %i scans = %i",
583 tap_chain_index, tap_pending_scans_num);
585 bytes_to_send = (tap_chain_index+7) / 8;
587 tmp[0] = CMD_TAP_SHIFT; /* this command expects number of bits */
588 tmp[1] = (char)(tap_chain_index >> 8); /* high */
589 tmp[2] = (char)(tap_chain_index); /* low */
592 for (i = 0; i < bytes_to_send; i++) {
593 tmp[fill_index] = tdi_chain[i];
595 tmp[fill_index] = tms_chain[i];
599 ret = buspirate_serial_write(buspirate_fd, tmp, 3 + bytes_to_send*2);
600 if (ret != bytes_to_send*2+3) {
601 LOG_ERROR("error writing :(");
602 return ERROR_JTAG_DEVICE_ERROR;
605 ret = buspirate_serial_read(buspirate_fd, tmp, bytes_to_send + 3);
606 in_buf = (uint8_t *)(&tmp[3]);
608 /* parse the scans */
609 for (i = 0; i < tap_pending_scans_num; i++) {
610 uint8_t *buffer = tap_pending_scans[i].buffer;
611 int length = tap_pending_scans[i].length;
612 int first = tap_pending_scans[i].first;
613 struct scan_command *command = tap_pending_scans[i].command;
615 /* copy bits from buffer */
616 buf_set_buf(in_buf, first, buffer, 0, length);
618 /* return buffer to higher level */
619 if (jtag_read_buffer(buffer, command) != ERROR_OK) {
620 buspirate_tap_init();
621 return ERROR_JTAG_QUEUE_FAILED;
626 tap_pending_scans_num = 0;
631 static void buspirate_tap_make_space(int scans, int bits)
633 int have_scans = BUSPIRATE_MAX_PENDING_SCANS - tap_pending_scans_num;
634 int have_bits = BUSPIRATE_BUFFER_SIZE * 8 - tap_chain_index;
636 if ((have_scans < scans) || (have_bits < bits))
637 buspirate_tap_execute();
640 static void buspirate_tap_append(int tms, int tdi)
644 buspirate_tap_make_space(0, 1);
645 chain_index = tap_chain_index / 8;
647 if (chain_index < BUSPIRATE_BUFFER_SIZE) {
648 int bit_index = tap_chain_index % 8;
649 uint8_t bit = 1 << bit_index;
652 tms_chain[chain_index] |= bit;
654 tms_chain[chain_index] &= ~bit;
657 tdi_chain[chain_index] |= bit;
659 tdi_chain[chain_index] &= ~bit;
663 LOG_ERROR("tap_chain overflow, Bad things will happen");
667 static void buspirate_tap_append_scan(int length, uint8_t *buffer,
668 struct scan_command *command)
671 tap_pending_scans[tap_pending_scans_num].length = length;
672 tap_pending_scans[tap_pending_scans_num].buffer = buffer;
673 tap_pending_scans[tap_pending_scans_num].command = command;
674 tap_pending_scans[tap_pending_scans_num].first = tap_chain_index;
676 for (i = 0; i < length; i++) {
677 int tms = (i < length-1 ? 0 : 1);
678 int tdi = (buffer[i/8] >> (i%8)) & 1;
679 buspirate_tap_append(tms, tdi);
681 tap_pending_scans_num++;
684 /*************** jtag wrapper functions *********************/
686 /* (1) assert or (0) deassert reset lines */
687 static void buspirate_reset(int trst, int srst)
689 LOG_DEBUG("trst: %i, srst: %i", trst, srst);
692 buspirate_jtag_set_feature(buspirate_fd,
693 FEATURE_TRST, ACTION_DISABLE);
695 buspirate_jtag_set_feature(buspirate_fd,
696 FEATURE_TRST, ACTION_ENABLE);
699 buspirate_jtag_set_feature(buspirate_fd,
700 FEATURE_SRST, ACTION_DISABLE);
702 buspirate_jtag_set_feature(buspirate_fd,
703 FEATURE_SRST, ACTION_ENABLE);
706 /*************** jtag lowlevel functions ********************/
707 static void buspirate_jtag_enable(int fd)
710 char tmp[21] = { [0 ... 20] = 0x00 };
714 LOG_DEBUG("Entering binary mode");
715 buspirate_serial_write(fd, tmp, 20);
718 /* reads 1 to n "BBIO1"s and one "OCD1" */
720 ret = buspirate_serial_read(fd, tmp, 4);
722 LOG_ERROR("Buspirate error. Is is binary/"
723 "/OpenOCD support enabled?");
726 if (strncmp(tmp, "BBIO", 4) == 0) {
727 ret = buspirate_serial_read(fd, tmp, 1);
729 LOG_ERROR("Buspirate did not correctly! "
730 "Do you have correct firmware?");
734 LOG_ERROR("Unsupported binary protocol ");
739 tmp[0] = CMD_ENTER_OOCD;
740 ret = buspirate_serial_write(fd, tmp, 1);
742 } else if (strncmp(tmp, "OCD1", 4) == 0)
745 LOG_ERROR("Buspirate did not correctly! "
746 "Do you have correct firmware?");
753 static void buspirate_jtag_reset(int fd)
758 tmp[0] = 0x00; /* exit OCD1 mode */
759 buspirate_serial_write(fd, tmp, 1);
761 ret = buspirate_serial_read(fd, tmp, 5);
762 if (strncmp(tmp, "BBIO1", 5) == 0) {
763 tmp[0] = 0x0F; /* reset BP */
764 buspirate_serial_write(fd, tmp, 1);
766 LOG_ERROR("Unable to restart buspirate!");
769 static void buspirate_jtag_set_speed(int fd, char speed)
778 tmp[0] = CMD_UART_SPEED;
780 buspirate_jtag_command(fd, tmp, 2);
782 /* here the adapter changes speed, we need follow */
783 buspirate_serial_setspeed(fd, speed);
785 buspirate_serial_write(fd, ack, 2);
786 ret = buspirate_serial_read(fd, tmp, 2);
788 LOG_ERROR("Buspirate did not ack speed change");
791 if ((tmp[0] != CMD_UART_SPEED) || (tmp[1] != speed)) {
792 LOG_ERROR("Buspirate didn't reply as expected");
795 LOG_INFO("Buspirate switched to %s mode",
796 (speed == SERIAL_NORMAL) ? "normal" : "FAST");
800 static void buspirate_jtag_set_mode(int fd, char mode)
803 tmp[0] = CMD_PORT_MODE;
805 buspirate_jtag_command(fd, tmp, 2);
808 static void buspirate_jtag_set_feature(int fd, char feat, char action)
811 tmp[0] = CMD_FEATURE;
812 tmp[1] = feat; /* what */
813 tmp[2] = action; /* action */
814 buspirate_jtag_command(fd, tmp, 3);
817 static void buspirate_jtag_get_adcs(int fd)
821 tmp[0] = CMD_READ_ADCS;
822 buspirate_jtag_command(fd, (char *)tmp, 1);
823 a = tmp[2] << 8 | tmp[3];
824 b = tmp[4] << 8 | tmp[5];
825 c = tmp[6] << 8 | tmp[7];
826 d = tmp[8] << 8 | tmp[9];
828 LOG_INFO("ADC: ADC_Pin = %.02f VPullup = %.02f V33 = %.02f "
830 ((float)a)/155.1515, ((float)b)/155.1515,
831 ((float)c)/155.1515, ((float)d)/155.1515);
834 static unsigned char buspirate_jtag_command(int fd,
835 char *cmd, int cmdlen)
840 res = buspirate_serial_write(fd, cmd, cmdlen);
842 if ((cmd[0] == CMD_UART_SPEED)
843 || (cmd[0] == CMD_PORT_MODE)
844 || (cmd[0] == CMD_FEATURE)
845 || (cmd[0] == CMD_JTAG_SPEED))
851 len = 10; /* 2*sizeof(char)+4*sizeof(uint16_t) */
859 res = buspirate_serial_read(fd, cmd, len);
861 return (unsigned char)cmd[1];
869 /* low level serial port */
870 /* TODO add support for WIN32 and others ! */
871 static int buspirate_serial_open(char *port)
874 fd = open(buspirate_port, O_RDWR | O_NOCTTY | O_NDELAY);
878 static int buspirate_serial_setspeed(int fd, char speed)
880 struct termios t_opt;
881 speed_t baud = (speed == SERIAL_FAST) ? B1000000 : B115200;
883 /* set the serial port parameters */
884 fcntl(fd, F_SETFL, 0);
885 tcgetattr(fd, &t_opt);
886 cfsetispeed(&t_opt, baud);
887 cfsetospeed(&t_opt, baud);
888 t_opt.c_cflag |= (CLOCAL | CREAD);
889 t_opt.c_cflag &= ~PARENB;
890 t_opt.c_cflag &= ~CSTOPB;
891 t_opt.c_cflag &= ~CSIZE;
892 t_opt.c_cflag |= CS8;
893 t_opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
894 t_opt.c_iflag &= ~(IXON | IXOFF | IXANY);
895 t_opt.c_oflag &= ~OPOST;
896 t_opt.c_cc[VMIN] = 0;
897 t_opt.c_cc[VTIME] = 10;
898 tcflush(fd, TCIFLUSH);
899 tcsetattr(fd, TCSANOW, &t_opt);
904 static int buspirate_serial_write(int fd, char *buf, int size)
908 ret = write(fd, buf, size);
910 LOG_DEBUG("size = %d ret = %d", size, ret);
911 buspirate_print_buffer(buf, size);
914 LOG_ERROR("Error sending data");
919 static int buspirate_serial_read(int fd, char *buf, int size)
926 ret = read(fd, buf+len, size-len);
942 LOG_DEBUG("should have read = %d actual size = %d", size, len);
943 buspirate_print_buffer(buf, len);
946 LOG_ERROR("Error reading data");
951 static void buspirate_serial_close(int fd)
957 #define BYTES_PER_LINE 16
958 static void buspirate_print_buffer(char *buf, int size)
960 char line[LINE_SIZE];
965 while (offset < size) {
966 snprintf(tmp, 5, "%02x ", (uint8_t)buf[offset]);
971 if (offset % BYTES_PER_LINE == 0) {
972 LOG_DEBUG("%s", line);
978 LOG_DEBUG("%s", line);