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|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* *
* Copyright (C) 2009 by Cahya Wirawan <cahya@gmx.at> *
* Based on opendous driver by Vladimir Fonov *
* *
* Copyright (C) 2009 by Vladimir Fonov <vladimir.fonov@gmai.com> *
* Based on J-link driver by Juergen Stuber *
* *
* Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
* based on Dominic Rath's and Benedikt Sauter's usbprog.c *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jtag/interface.h>
#include <jtag/commands.h>
#include "libusb_helper.h"
#include <string.h>
#include <time.h>
#define OPENDOUS_MAX_VIDS_PIDS 4
/* define some probes with similar interface */
struct opendous_probe {
const char *name;
uint16_t VID[OPENDOUS_MAX_VIDS_PIDS];
uint16_t PID[OPENDOUS_MAX_VIDS_PIDS];
uint8_t READ_EP;
uint8_t WRITE_EP;
uint8_t CONTROL_TRANSFER;
int BUFFERSIZE;
};
static const struct opendous_probe opendous_probes[] = {
{"usbprog-jtag", {0x1781, 0}, {0x0C63, 0}, 0x82, 0x02, 0x00, 510 },
{"opendous", {0x1781, 0x03EB, 0}, {0xC0C0, 0x204F, 0}, 0x81, 0x02, 0x00, 360 },
{"usbvlab", {0x16C0, 0}, {0x05DC, 0}, 0x81, 0x02, 0x01, 360 },
{NULL, {0x0000}, {0x0000}, 0x00, 0x00, 0x00, 0 }
};
#define OPENDOUS_WRITE_ENDPOINT (opendous_probe->WRITE_EP)
#define OPENDOUS_READ_ENDPOINT (opendous_probe->READ_EP)
static unsigned int opendous_hw_jtag_version = 1;
#define OPENDOUS_USB_TIMEOUT 1000
#define OPENDOUS_USB_BUFFER_SIZE (opendous_probe->BUFFERSIZE)
#define OPENDOUS_IN_BUFFER_SIZE (OPENDOUS_USB_BUFFER_SIZE)
#define OPENDOUS_OUT_BUFFER_SIZE (OPENDOUS_USB_BUFFER_SIZE)
/* Global USB buffers */
static uint8_t *usb_in_buffer;
static uint8_t *usb_out_buffer;
/* Constants for OPENDOUS command */
#define OPENDOUS_MAX_SPEED 66
#define OPENDOUS_MAX_TAP_TRANSMIT ((opendous_probe->BUFFERSIZE)-10)
#define OPENDOUS_MAX_INPUT_DATA (OPENDOUS_MAX_TAP_TRANSMIT*4)
/* TAP */
#define OPENDOUS_TAP_BUFFER_SIZE 65536
struct pending_scan_result {
int first; /* First bit position in tdo_buffer to read */
int length; /* Number of bits to read */
struct scan_command *command; /* Corresponding scan command */
uint8_t *buffer;
};
static int pending_scan_results_length;
static struct pending_scan_result *pending_scan_results_buffer;
#define MAX_PENDING_SCAN_RESULTS (OPENDOUS_MAX_INPUT_DATA)
/* JTAG usb commands */
#define JTAG_CMD_TAP_OUTPUT 0x0
#define JTAG_CMD_SET_TRST 0x1
#define JTAG_CMD_SET_SRST 0x2
#define JTAG_CMD_READ_INPUT 0x3
#define JTAG_CMD_TAP_OUTPUT_EMU 0x4
#define JTAG_CMD_SET_DELAY 0x5
#define JTAG_CMD_SET_SRST_TRST 0x6
#define JTAG_CMD_READ_CONFIG 0x7
/* usbvlab control transfer */
#define FUNC_START_BOOTLOADER 30
#define FUNC_WRITE_DATA 0x50
#define FUNC_READ_DATA 0x51
static char *opendous_type;
static const struct opendous_probe *opendous_probe;
/* External interface functions */
static int opendous_execute_queue(void);
static int opendous_init(void);
static int opendous_quit(void);
/* Queue command functions */
static void opendous_end_state(tap_state_t state);
static void opendous_state_move(void);
static void opendous_path_move(int num_states, tap_state_t *path);
static void opendous_runtest(int num_cycles);
static void opendous_scan(int ir_scan, enum scan_type type, uint8_t *buffer,
int scan_size, struct scan_command *command);
static void opendous_reset(int trst, int srst);
static void opendous_simple_command(uint8_t command, uint8_t _data);
static int opendous_get_status(void);
/* opendous tap buffer functions */
static void opendous_tap_init(void);
static int opendous_tap_execute(void);
static void opendous_tap_ensure_space(int scans, int bits);
static void opendous_tap_append_step(int tms, int tdi);
static void opendous_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command);
/* opendous lowlevel functions */
struct opendous_jtag {
struct libusb_device_handle *usb_handle;
};
static struct opendous_jtag *opendous_usb_open(void);
static void opendous_usb_close(struct opendous_jtag *opendous_jtag);
static int opendous_usb_message(struct opendous_jtag *opendous_jtag, int out_length, int in_length);
static int opendous_usb_write(struct opendous_jtag *opendous_jtag, int out_length);
static int opendous_usb_read(struct opendous_jtag *opendous_jtag);
/* helper functions */
static int opendous_get_version_info(void);
#ifdef _DEBUG_USB_COMMS_
static void opendous_debug_buffer(uint8_t *buffer, int length);
#endif
static struct opendous_jtag *opendous_jtag_handle;
/***************************************************************************/
/* External interface implementation */
COMMAND_HANDLER(opendous_handle_opendous_type_command)
{
if (CMD_ARGC == 0)
return ERROR_OK;
/* only if the cable name wasn't overwritten by cmdline */
if (!opendous_type) {
/* REVISIT first verify that it's listed in cables[] ... */
opendous_type = strdup(CMD_ARGV[0]);
}
/* REVISIT it's probably worth returning the current value ... */
return ERROR_OK;
}
COMMAND_HANDLER(opendous_handle_opendous_info_command)
{
if (opendous_get_version_info() == ERROR_OK) {
/* attempt to get status */
opendous_get_status();
}
return ERROR_OK;
}
COMMAND_HANDLER(opendous_handle_opendous_hw_jtag_command)
{
switch (CMD_ARGC) {
case 0:
command_print(CMD, "opendous hw jtag %i", opendous_hw_jtag_version);
break;
case 1: {
int request_version = atoi(CMD_ARGV[0]);
switch (request_version) {
case 2:
case 3:
opendous_hw_jtag_version = request_version;
break;
default:
return ERROR_COMMAND_SYNTAX_ERROR;
}
break;
}
default:
return ERROR_COMMAND_SYNTAX_ERROR;
}
return ERROR_OK;
}
static const struct command_registration opendous_command_handlers[] = {
{
.name = "opendous_info",
.handler = &opendous_handle_opendous_info_command,
.mode = COMMAND_EXEC,
.help = "show opendous info",
.usage = "",
},
{
.name = "opendous_hw_jtag",
.handler = &opendous_handle_opendous_hw_jtag_command,
.mode = COMMAND_EXEC,
.help = "access opendous HW JTAG command version",
.usage = "[2|3]",
},
{
.name = "opendous_type",
.handler = &opendous_handle_opendous_type_command,
.mode = COMMAND_CONFIG,
.help = "set opendous type",
.usage = "[usbvlab|usbprog-jtag|opendous]",
},
COMMAND_REGISTRATION_DONE
};
static struct jtag_interface opendous_interface = {
.execute_queue = opendous_execute_queue,
};
struct adapter_driver opendous_adapter_driver = {
.name = "opendous",
.transports = jtag_only,
.commands = opendous_command_handlers,
.init = opendous_init,
.quit = opendous_quit,
.jtag_ops = &opendous_interface,
};
static int opendous_execute_queue(void)
{
struct jtag_command *cmd = jtag_command_queue;
int scan_size;
enum scan_type type;
uint8_t *buffer;
while (cmd) {
switch (cmd->type) {
case JTAG_RUNTEST:
LOG_DEBUG_IO("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles,
cmd->cmd.runtest->end_state);
if (cmd->cmd.runtest->end_state != -1)
opendous_end_state(cmd->cmd.runtest->end_state);
opendous_runtest(cmd->cmd.runtest->num_cycles);
break;
case JTAG_TLR_RESET:
LOG_DEBUG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
if (cmd->cmd.statemove->end_state != -1)
opendous_end_state(cmd->cmd.statemove->end_state);
opendous_state_move();
break;
case JTAG_PATHMOVE:
LOG_DEBUG_IO("pathmove: %i states, end in %i",
cmd->cmd.pathmove->num_states,
cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
opendous_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
break;
case JTAG_SCAN:
LOG_DEBUG_IO("scan end in %i", cmd->cmd.scan->end_state);
if (cmd->cmd.scan->end_state != -1)
opendous_end_state(cmd->cmd.scan->end_state);
scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
LOG_DEBUG_IO("scan input, length = %d", scan_size);
#ifdef _DEBUG_USB_COMMS_
opendous_debug_buffer(buffer, (scan_size + 7) / 8);
#endif
type = jtag_scan_type(cmd->cmd.scan);
opendous_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan);
break;
case JTAG_RESET:
LOG_DEBUG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
opendous_tap_execute();
if (cmd->cmd.reset->trst == 1)
tap_set_state(TAP_RESET);
opendous_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
break;
case JTAG_SLEEP:
LOG_DEBUG_IO("sleep %" PRIu32, cmd->cmd.sleep->us);
opendous_tap_execute();
jtag_sleep(cmd->cmd.sleep->us);
break;
default:
LOG_ERROR("BUG: unknown JTAG command type encountered");
exit(-1);
}
cmd = cmd->next;
}
return opendous_tap_execute();
}
static int opendous_init(void)
{
int check_cnt;
const struct opendous_probe *cur_opendous_probe;
cur_opendous_probe = opendous_probes;
if (!opendous_type) {
opendous_type = strdup("opendous");
LOG_WARNING("No opendous_type specified, using default 'opendous'");
}
while (cur_opendous_probe->name) {
if (strcmp(cur_opendous_probe->name, opendous_type) == 0) {
opendous_probe = cur_opendous_probe;
break;
}
cur_opendous_probe++;
}
if (!opendous_probe) {
LOG_ERROR("No matching cable found for %s", opendous_type);
return ERROR_JTAG_INIT_FAILED;
}
usb_in_buffer = malloc(opendous_probe->BUFFERSIZE);
usb_out_buffer = malloc(opendous_probe->BUFFERSIZE);
pending_scan_results_buffer = malloc(
MAX_PENDING_SCAN_RESULTS * sizeof(*pending_scan_results_buffer));
opendous_jtag_handle = opendous_usb_open();
if (opendous_jtag_handle == 0) {
LOG_ERROR("Cannot find opendous Interface! Please check connection and permissions.");
return ERROR_JTAG_INIT_FAILED;
}
check_cnt = 0;
while (check_cnt < 3) {
if (opendous_get_version_info() == ERROR_OK) {
/* attempt to get status */
opendous_get_status();
break;
}
check_cnt++;
}
LOG_INFO("opendous JTAG Interface ready");
opendous_reset(0, 0);
opendous_tap_init();
return ERROR_OK;
}
static int opendous_quit(void)
{
opendous_usb_close(opendous_jtag_handle);
free(usb_out_buffer);
usb_out_buffer = NULL;
free(usb_in_buffer);
usb_in_buffer = NULL;
free(pending_scan_results_buffer);
pending_scan_results_buffer = NULL;
free(opendous_type);
opendous_type = NULL;
return ERROR_OK;
}
/***************************************************************************/
/* Queue command implementations */
void opendous_end_state(tap_state_t state)
{
if (tap_is_state_stable(state))
tap_set_end_state(state);
else {
LOG_ERROR("BUG: %i is not a valid end state", state);
exit(-1);
}
}
/* Goes to the end state. */
void opendous_state_move(void)
{
int i;
int tms = 0;
uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
for (i = 0; i < tms_scan_bits; i++) {
tms = (tms_scan >> i) & 1;
opendous_tap_append_step(tms, 0);
}
tap_set_state(tap_get_end_state());
}
void opendous_path_move(int num_states, tap_state_t *path)
{
int i;
for (i = 0; i < num_states; i++) {
if (path[i] == tap_state_transition(tap_get_state(), false))
opendous_tap_append_step(0, 0);
else if (path[i] == tap_state_transition(tap_get_state(), true))
opendous_tap_append_step(1, 0);
else {
LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
tap_state_name(tap_get_state()), tap_state_name(path[i]));
exit(-1);
}
tap_set_state(path[i]);
}
tap_set_end_state(tap_get_state());
}
void opendous_runtest(int num_cycles)
{
int i;
tap_state_t saved_end_state = tap_get_end_state();
/* only do a state_move when we're not already in IDLE */
if (tap_get_state() != TAP_IDLE) {
opendous_end_state(TAP_IDLE);
opendous_state_move();
}
/* execute num_cycles */
for (i = 0; i < num_cycles; i++)
opendous_tap_append_step(0, 0);
/* finish in end_state */
opendous_end_state(saved_end_state);
if (tap_get_state() != tap_get_end_state())
opendous_state_move();
}
void opendous_scan(int ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command)
{
tap_state_t saved_end_state;
opendous_tap_ensure_space(1, scan_size + 8);
saved_end_state = tap_get_end_state();
/* Move to appropriate scan state */
opendous_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
if (tap_get_state() != tap_get_end_state())
opendous_state_move();
opendous_end_state(saved_end_state);
/* Scan */
opendous_tap_append_scan(scan_size, buffer, command);
/* We are in Exit1, go to Pause */
opendous_tap_append_step(0, 0);
tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
if (tap_get_state() != tap_get_end_state())
opendous_state_move();
}
void opendous_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
/* Signals are active low */
#if 0
if (srst == 0)
opendous_simple_command(JTAG_CMD_SET_SRST, 1);
else if (srst == 1)
opendous_simple_command(JTAG_CMD_SET_SRST, 0);
if (trst == 0)
opendous_simple_command(JTAG_CMD_SET_TRST, 1);
else if (trst == 1)
opendous_simple_command(JTAG_CMD_SET_TRST, 0);
#endif
srst = srst ? 0 : 1;
trst = trst ? 0 : 2;
opendous_simple_command(JTAG_CMD_SET_SRST_TRST, srst | trst);
}
void opendous_simple_command(uint8_t command, uint8_t _data)
{
int result;
LOG_DEBUG_IO("0x%02x 0x%02x", command, _data);
usb_out_buffer[0] = 2;
usb_out_buffer[1] = 0;
usb_out_buffer[2] = command;
usb_out_buffer[3] = _data;
result = opendous_usb_message(opendous_jtag_handle, 4, 1);
if (result != 1)
LOG_ERROR("opendous command 0x%02x failed (%d)", command, result);
}
int opendous_get_status(void)
{
return ERROR_OK;
}
static int opendous_get_version_info(void)
{
return ERROR_OK;
}
/***************************************************************************/
/* Estick tap functions */
static int tap_length;
static uint8_t tms_buffer[OPENDOUS_TAP_BUFFER_SIZE];
static uint8_t tdo_buffer[OPENDOUS_TAP_BUFFER_SIZE];
static int last_tms;
void opendous_tap_init(void)
{
tap_length = 0;
pending_scan_results_length = 0;
}
void opendous_tap_ensure_space(int scans, int bits)
{
int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
int available_bits = OPENDOUS_TAP_BUFFER_SIZE / 2 - tap_length;
if ((scans > available_scans) || (bits > available_bits))
opendous_tap_execute();
}
void opendous_tap_append_step(int tms, int tdi)
{
last_tms = tms;
unsigned char _tms = tms ? 1 : 0;
unsigned char _tdi = tdi ? 1 : 0;
opendous_tap_ensure_space(0, 1);
int tap_index = tap_length / 4;
int bits = (tap_length % 4) * 2;
if (tap_length < OPENDOUS_TAP_BUFFER_SIZE) {
if (!bits)
tms_buffer[tap_index] = 0;
tms_buffer[tap_index] |= (_tdi << bits)|(_tms << (bits + 1));
tap_length++;
} else
LOG_ERROR("opendous_tap_append_step, overflow");
}
void opendous_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command)
{
LOG_DEBUG_IO("append scan, length = %d", length);
struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
int i;
pending_scan_result->first = tap_length;
pending_scan_result->length = length;
pending_scan_result->command = command;
pending_scan_result->buffer = buffer;
for (i = 0; i < length; i++)
opendous_tap_append_step((i < length-1 ? 0 : 1), (buffer[i / 8] >> (i % 8)) & 1);
pending_scan_results_length++;
}
/* Pad and send a tap sequence to the device, and receive the answer.
* For the purpose of padding we assume that we are in idle or pause state. */
int opendous_tap_execute(void)
{
int byte_length;
int i, j;
int result;
#ifdef _DEBUG_USB_COMMS_
int byte_length_out;
#endif
if (tap_length > 0) {
/* memset(tdo_buffer,0,OPENDOUS_TAP_BUFFER_SIZE); */
/* LOG_INFO("OPENDOUS tap execute %d",tap_length); */
byte_length = (tap_length + 3) / 4;
#ifdef _DEBUG_USB_COMMS_
byte_length_out = (tap_length + 7) / 8;
LOG_DEBUG("opendous is sending %d bytes", byte_length);
#endif
for (j = 0, i = 0; j < byte_length;) {
int receive;
int transmit = byte_length - j;
if (transmit > OPENDOUS_MAX_TAP_TRANSMIT) {
transmit = OPENDOUS_MAX_TAP_TRANSMIT;
receive = (OPENDOUS_MAX_TAP_TRANSMIT) / 2;
usb_out_buffer[2] = JTAG_CMD_TAP_OUTPUT;
} else {
usb_out_buffer[2] = JTAG_CMD_TAP_OUTPUT | ((tap_length % 4) << 4);
receive = (transmit + 1) / 2;
}
usb_out_buffer[0] = (transmit + 1) & 0xff;
usb_out_buffer[1] = ((transmit + 1) >> 8) & 0xff;
memmove(usb_out_buffer + 3, tms_buffer + j, transmit);
result = opendous_usb_message(opendous_jtag_handle, 3 + transmit, receive);
if (result != receive) {
LOG_ERROR("opendous_tap_execute, wrong result %d, expected %d", result, receive);
return ERROR_JTAG_QUEUE_FAILED;
}
memmove(tdo_buffer + i, usb_in_buffer, receive);
i += receive;
j += transmit;
}
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("opendous tap result %d", byte_length_out);
opendous_debug_buffer(tdo_buffer, byte_length_out);
#endif
/* LOG_INFO("eStick tap execute %d",tap_length); */
for (i = 0; i < pending_scan_results_length; i++) {
struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i];
uint8_t *buffer = pending_scan_result->buffer;
int length = pending_scan_result->length;
int first = pending_scan_result->first;
struct scan_command *command = pending_scan_result->command;
/* Copy to buffer */
buf_set_buf(tdo_buffer, first, buffer, 0, length);
LOG_DEBUG_IO("pending scan result, length = %d", length);
#ifdef _DEBUG_USB_COMMS_
opendous_debug_buffer(buffer, byte_length_out);
#endif
if (jtag_read_buffer(buffer, command) != ERROR_OK) {
opendous_tap_init();
return ERROR_JTAG_QUEUE_FAILED;
}
free(pending_scan_result->buffer);
}
opendous_tap_init();
}
return ERROR_OK;
}
/*****************************************************************************/
/* Estick USB low-level functions */
struct opendous_jtag *opendous_usb_open(void)
{
struct opendous_jtag *result;
struct libusb_device_handle *devh;
if (jtag_libusb_open(opendous_probe->VID, opendous_probe->PID, &devh, NULL) != ERROR_OK)
return NULL;
jtag_libusb_set_configuration(devh, 0);
libusb_claim_interface(devh, 0);
result = malloc(sizeof(*result));
result->usb_handle = devh;
return result;
}
void opendous_usb_close(struct opendous_jtag *opendous_jtag)
{
jtag_libusb_close(opendous_jtag->usb_handle);
free(opendous_jtag);
}
/* Send a message and receive the reply. */
int opendous_usb_message(struct opendous_jtag *opendous_jtag, int out_length, int in_length)
{
int result;
result = opendous_usb_write(opendous_jtag, out_length);
if (result == out_length) {
result = opendous_usb_read(opendous_jtag);
if (result == in_length)
return result;
else {
LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result);
return -1;
}
} else {
LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result);
return -1;
}
}
/* Write data from out_buffer to USB. */
int opendous_usb_write(struct opendous_jtag *opendous_jtag, int out_length)
{
int result;
if (out_length > OPENDOUS_OUT_BUFFER_SIZE) {
LOG_ERROR("opendous_jtag_write illegal out_length=%d (max=%d)", out_length, OPENDOUS_OUT_BUFFER_SIZE);
return -1;
}
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("USB write begin");
#endif
if (opendous_probe->CONTROL_TRANSFER) {
result = jtag_libusb_control_transfer(opendous_jtag->usb_handle,
LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_OUT,
FUNC_WRITE_DATA, 0, 0, (char *) usb_out_buffer, out_length, OPENDOUS_USB_TIMEOUT);
} else {
jtag_libusb_bulk_write(opendous_jtag->usb_handle, OPENDOUS_WRITE_ENDPOINT,
(char *)usb_out_buffer, out_length, OPENDOUS_USB_TIMEOUT, &result);
}
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("USB write end: %d bytes", result);
#endif
LOG_DEBUG_IO("opendous_usb_write, out_length = %d, result = %d", out_length, result);
#ifdef _DEBUG_USB_COMMS_
opendous_debug_buffer(usb_out_buffer, out_length);
#endif
return result;
}
/* Read data from USB into in_buffer. */
int opendous_usb_read(struct opendous_jtag *opendous_jtag)
{
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("USB read begin");
#endif
int result;
if (opendous_probe->CONTROL_TRANSFER) {
result = jtag_libusb_control_transfer(opendous_jtag->usb_handle,
LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_DEVICE | LIBUSB_ENDPOINT_IN,
FUNC_READ_DATA, 0, 0, (char *) usb_in_buffer, OPENDOUS_IN_BUFFER_SIZE, OPENDOUS_USB_TIMEOUT);
} else {
jtag_libusb_bulk_read(opendous_jtag->usb_handle, OPENDOUS_READ_ENDPOINT,
(char *)usb_in_buffer, OPENDOUS_IN_BUFFER_SIZE, OPENDOUS_USB_TIMEOUT, &result);
}
#ifdef _DEBUG_USB_COMMS_
LOG_DEBUG("USB read end: %d bytes", result);
#endif
LOG_DEBUG_IO("opendous_usb_read, result = %d", result);
#ifdef _DEBUG_USB_COMMS_
opendous_debug_buffer(usb_in_buffer, result);
#endif
return result;
}
#ifdef _DEBUG_USB_COMMS_
#define BYTES_PER_LINE 16
void opendous_debug_buffer(uint8_t *buffer, int length)
{
char line[81];
char s[4];
int i;
int j;
for (i = 0; i < length; i += BYTES_PER_LINE) {
snprintf(line, 5, "%04x", i);
for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
snprintf(s, 4, " %02x", buffer[j]);
strcat(line, s);
}
LOG_DEBUG("%s", line);
}
}
#endif
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