diff options
Diffstat (limited to 'src/jtag/drivers/arm-jtag-ew.c')
| -rw-r--r-- | src/jtag/drivers/arm-jtag-ew.c | 837 |
1 files changed, 837 insertions, 0 deletions
diff --git a/src/jtag/drivers/arm-jtag-ew.c b/src/jtag/drivers/arm-jtag-ew.c new file mode 100644 index 00000000..46c31070 --- /dev/null +++ b/src/jtag/drivers/arm-jtag-ew.c @@ -0,0 +1,837 @@ +/*************************************************************************** + * Copyright (C) 2009 by Dimitar Dimitrov <dinuxbg@gmail.com> * + * based on Dominic Rath's and Benedikt Sauter's usbprog.c * + * * + * 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, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "interface.h" +#include "commands.h" +#include <usb.h> +#include "usb_common.h" + + +#define USB_VID 0x15ba +#define USB_PID 0x001e + +#define ARMJTAGEW_EPT_BULK_OUT 0x01u +#define ARMJTAGEW_EPT_BULK_IN 0x82u + +#define ARMJTAGEW_USB_TIMEOUT 2000 + +#define ARMJTAGEW_IN_BUFFER_SIZE (4*1024) +#define ARMJTAGEW_OUT_BUFFER_SIZE (4*1024) + + +/* USB command request codes. */ +#define CMD_GET_VERSION 0x00 +#define CMD_SELECT_DPIMPL 0x10 +#define CMD_SET_TCK_FREQUENCY 0x11 +#define CMD_GET_TCK_FREQUENCY 0x12 +#define CMD_MEASURE_MAX_TCK_FREQ 0x15 +#define CMD_MEASURE_RTCK_RESPONSE 0x16 +#define CMD_TAP_SHIFT 0x17 +#define CMD_SET_TAPHW_STATE 0x20 +#define CMD_GET_TAPHW_STATE 0x21 +#define CMD_TGPWR_SETUP 0x22 + +/* Global USB buffers */ +static uint8_t usb_in_buffer[ARMJTAGEW_IN_BUFFER_SIZE]; +static uint8_t usb_out_buffer[ARMJTAGEW_OUT_BUFFER_SIZE]; + +/* Queue command functions */ +static void armjtagew_end_state(tap_state_t state); +static void armjtagew_state_move(void); +static void armjtagew_path_move(int num_states, tap_state_t *path); +static void armjtagew_runtest(int num_cycles); +static void armjtagew_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command); +static void armjtagew_reset(int trst, int srst); +//static void armjtagew_simple_command(uint8_t command); +static int armjtagew_get_status(void); + +/* tap buffer functions */ +static void armjtagew_tap_init(void); +static int armjtagew_tap_execute(void); +static void armjtagew_tap_ensure_space(int scans, int bits); +static void armjtagew_tap_append_step(int tms, int tdi); +static void armjtagew_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command); + +/* ARM-JTAG-EW lowlevel functions */ +struct armjtagew { + struct usb_dev_handle* usb_handle; +}; + +static struct armjtagew *armjtagew_usb_open(void); +static void armjtagew_usb_close(struct armjtagew *armjtagew); +static int armjtagew_usb_message(struct armjtagew *armjtagew, int out_length, int in_length); +static int armjtagew_usb_write(struct armjtagew *armjtagew, int out_length); +static int armjtagew_usb_read(struct armjtagew *armjtagew, int exp_in_length); + +/* helper functions */ +static int armjtagew_get_version_info(void); + +#ifdef _DEBUG_USB_COMMS_ +static void armjtagew_debug_buffer(uint8_t *buffer, int length); +#endif + +static struct armjtagew* armjtagew_handle; + + + +/***************************************************************************/ +/* External interface implementation */ + +static int armjtagew_execute_queue(void) +{ + struct jtag_command *cmd = jtag_command_queue; + int scan_size; + enum scan_type type; + uint8_t *buffer; + + while (cmd != NULL) + { + switch (cmd->type) + { + case JTAG_RUNTEST: + DEBUG_JTAG_IO("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, \ + cmd->cmd.runtest->end_state); + + armjtagew_end_state(cmd->cmd.runtest->end_state); + armjtagew_runtest(cmd->cmd.runtest->num_cycles); + break; + + case JTAG_STATEMOVE: + DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state); + + armjtagew_end_state(cmd->cmd.statemove->end_state); + armjtagew_state_move(); + break; + + case JTAG_PATHMOVE: + DEBUG_JTAG_IO("pathmove: %i states, end in %i", \ + cmd->cmd.pathmove->num_states, \ + cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]); + + armjtagew_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path); + break; + + case JTAG_SCAN: + DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state); + + armjtagew_end_state(cmd->cmd.scan->end_state); + + scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer); + DEBUG_JTAG_IO("scan input, length = %d", scan_size); + +#ifdef _DEBUG_USB_COMMS_ + armjtagew_debug_buffer(buffer, (scan_size + 7) / 8); +#endif + type = jtag_scan_type(cmd->cmd.scan); + armjtagew_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan); + break; + + case JTAG_RESET: + DEBUG_JTAG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst); + + armjtagew_tap_execute(); + + if (cmd->cmd.reset->trst == 1) + { + tap_set_state(TAP_RESET); + } + armjtagew_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst); + break; + + case JTAG_SLEEP: + DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us); + armjtagew_tap_execute(); + jtag_sleep(cmd->cmd.sleep->us); + break; + + default: + LOG_ERROR("BUG: unknown JTAG command type encountered"); + exit(-1); + } + cmd = cmd->next; + } + + return armjtagew_tap_execute(); +} + + +/* Sets speed in kHz. */ +static int armjtagew_speed(int speed) +{ + int result; + int speed_real; + + + usb_out_buffer[0] = CMD_SET_TCK_FREQUENCY; + buf_set_u32(usb_out_buffer + 1, 0, 32, speed); + + result = armjtagew_usb_message(armjtagew_handle, 4, 4); + + if (result < 0) + { + LOG_ERROR("ARM-JTAG-EW setting speed failed (%d)", result); + return ERROR_JTAG_DEVICE_ERROR; + } + + usb_out_buffer[0] = CMD_GET_TCK_FREQUENCY; + result = armjtagew_usb_message(armjtagew_handle, 1, 4); + speed_real = (int)buf_get_u32(usb_in_buffer,0,32); + if (result < 0) + { + LOG_ERROR("ARM-JTAG-EW getting speed failed (%d)", result); + return ERROR_JTAG_DEVICE_ERROR; + } + else + { + LOG_INFO("Requested speed %dkHz, emulator reported %dkHz.", speed, speed_real); + } + + return ERROR_OK; +} + + +static int armjtagew_khz(int khz, int *jtag_speed) +{ + *jtag_speed = khz; + + return ERROR_OK; +} + +static int armjtagew_init(void) +{ + int check_cnt; + + armjtagew_handle = armjtagew_usb_open(); + + if (armjtagew_handle == 0) + { + LOG_ERROR("Cannot find ARM-JTAG-EW Interface! Please check connection and permissions."); + return ERROR_JTAG_INIT_FAILED; + } + + check_cnt = 0; + while (check_cnt < 3) + { + if (armjtagew_get_version_info() == ERROR_OK) + { + /* attempt to get status */ + armjtagew_get_status(); + break; + } + + check_cnt++; + } + + if (check_cnt == 3) + { + LOG_INFO("ARM-JTAG-EW initial read failed, don't worry"); + } + + LOG_INFO("ARM-JTAG-EW JTAG Interface ready"); + + armjtagew_reset(0, 0); + armjtagew_tap_init(); + + return ERROR_OK; +} + +static int armjtagew_quit(void) +{ + armjtagew_usb_close(armjtagew_handle); + return ERROR_OK; +} + +/***************************************************************************/ +/* Queue command implementations */ + +static void armjtagew_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. */ +static void armjtagew_state_move(void) +{ + int i; + int tms = 0; + uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state()); + int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state()); + + for (i = 0; i < tms_count; i++) + { + tms = (tms_scan >> i) & 1; + armjtagew_tap_append_step(tms, 0); + } + + tap_set_state(tap_get_end_state()); +} + +static void armjtagew_path_move(int num_states, tap_state_t *path) +{ + int i; + + for (i = 0; i < num_states; i++) + { + /* + * TODO: The ARM-JTAG-EW hardware delays TDI with 3 TCK cycles when in RTCK mode. + * Either handle that here, or update the documentation with examples + * how to fix that in the configuration files. + */ + if (path[i] == tap_state_transition(tap_get_state(), false)) + { + armjtagew_tap_append_step(0, 0); + } + else if (path[i] == tap_state_transition(tap_get_state(), true)) + { + armjtagew_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()); +} + +static void armjtagew_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) + { + armjtagew_end_state(TAP_IDLE); + armjtagew_state_move(); + } + + /* execute num_cycles */ + for (i = 0; i < num_cycles; i++) + { + armjtagew_tap_append_step(0, 0); + } + + /* finish in end_state */ + armjtagew_end_state(saved_end_state); + if (tap_get_state() != tap_get_end_state()) + { + armjtagew_state_move(); + } +} + +static void armjtagew_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command) +{ + tap_state_t saved_end_state; + + armjtagew_tap_ensure_space(1, scan_size + 8); + + saved_end_state = tap_get_end_state(); + + /* Move to appropriate scan state */ + armjtagew_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT); + + armjtagew_state_move(); + armjtagew_end_state(saved_end_state); + + /* Scan */ + armjtagew_tap_append_scan(scan_size, buffer, command); + + /* We are in Exit1, go to Pause */ + armjtagew_tap_append_step(0, 0); + + tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE); + + if (tap_get_state() != tap_get_end_state()) + { + armjtagew_state_move(); + } +} + +static void armjtagew_reset(int trst, int srst) +{ + const uint8_t trst_mask = (1u << 5); + const uint8_t srst_mask = (1u << 6); + uint8_t val = 0; + uint8_t outp_en = 0; + uint8_t change_mask = 0; + int result; + + LOG_DEBUG("trst: %i, srst: %i", trst, srst); + + if (srst == 0) + { + val |= srst_mask; + outp_en &= ~srst_mask; /* tristate */ + change_mask |= srst_mask; + } + else if (srst == 1) + { + val &= ~srst_mask; + outp_en |= srst_mask; + change_mask |= srst_mask; + } + + if (trst == 0) + { + val |= trst_mask; + outp_en &= ~trst_mask; /* tristate */ + change_mask |= trst_mask; + } + else if (trst == 1) + { + val &= ~trst_mask; + outp_en |= trst_mask; + change_mask |= trst_mask; + } + + usb_out_buffer[0] = CMD_SET_TAPHW_STATE; + usb_out_buffer[1] = val; + usb_out_buffer[2] = outp_en; + usb_out_buffer[3] = change_mask; + result = armjtagew_usb_write(armjtagew_handle, 4); + if (result != 4) + { + LOG_ERROR("ARM-JTAG-EW TRST/SRST pin set failed failed (%d)", result); + } +} + + +static int armjtagew_get_status(void) +{ + int result; + + usb_out_buffer[0] = CMD_GET_TAPHW_STATE; + result = armjtagew_usb_message(armjtagew_handle, 1, 12); + + if (result == 0) + { + unsigned int u_tg = buf_get_u32(usb_in_buffer, 0, 16); + LOG_INFO("U_tg = %d mV, U_aux = %d mV, U_tgpwr = %d mV, I_tgpwr = %d mA, D1 = %d, Target power %s %s\n", + (int)(buf_get_u32(usb_in_buffer + 0, 0, 16)), + (int)(buf_get_u32(usb_in_buffer + 2, 0, 16)), + (int)(buf_get_u32(usb_in_buffer + 4, 0, 16)), + (int)(buf_get_u32(usb_in_buffer + 6, 0, 16)), + usb_in_buffer[9], + usb_in_buffer[11] ? "OVERCURRENT" : "OK", + usb_in_buffer[10] ? "enabled" : "disabled"); + + if (u_tg < 1500) + { + LOG_ERROR("Vref too low. Check Target Power\n"); + } + } + else + { + LOG_ERROR("ARM-JTAG-EW command CMD_GET_TAPHW_STATE failed (%d)\n", result); + } + + return ERROR_OK; +} + +static int armjtagew_get_version_info(void) +{ + int result; + char sn[16]; + char auxinfo[257]; + + /* query hardware version */ + usb_out_buffer[0] = CMD_GET_VERSION; + result = armjtagew_usb_message(armjtagew_handle, 1, 4 + 15 + 256); + + if (result != 0) + { + LOG_ERROR("ARM-JTAG-EW command CMD_GET_VERSION failed (%d)\n", result); + return ERROR_JTAG_DEVICE_ERROR; + } + + + memcpy(sn, usb_in_buffer + 4, 15); + sn[15] = '\0'; + memcpy(auxinfo, usb_in_buffer + 4+15, 256); + auxinfo[256] = '\0'; + + LOG_INFO("ARM-JTAG-EW firmware version %d.%d, hardware revision %c, SN=%s, Additional info: %s", \ + usb_in_buffer[1], usb_in_buffer[0], \ + isgraph(usb_in_buffer[2]) ? usb_in_buffer[2] : 'X', \ + sn, auxinfo); + return ERROR_OK; +} + +COMMAND_HANDLER(armjtagew_handle_armjtagew_info_command) +{ + if (armjtagew_get_version_info() == ERROR_OK) + { + /* attempt to get status */ + armjtagew_get_status(); + } + + return ERROR_OK; +} + +static const struct command_registration armjtagew_command_handlers[] = { + { + .name = "armjtagew_info", + .handler = &armjtagew_handle_armjtagew_info_command, + .mode = COMMAND_EXEC, + .help = "query armjtagew info", + }, + COMMAND_REGISTRATION_DONE +}; + +struct jtag_interface armjtagew_interface = { + .name = "arm-jtag-ew", + + .commands = armjtagew_command_handlers, + + .execute_queue = &armjtagew_execute_queue, + .speed = &armjtagew_speed, + .khz = &armjtagew_khz, + + .init = &armjtagew_init, + .quit = &armjtagew_quit, + }; + +/***************************************************************************/ +/* ARM-JTAG-EW tap functions */ + +/* 2048 is the max value we can use here */ +#define ARMJTAGEW_TAP_BUFFER_SIZE 2048 + +static int tap_length; +static uint8_t tms_buffer[ARMJTAGEW_TAP_BUFFER_SIZE]; +static uint8_t tdi_buffer[ARMJTAGEW_TAP_BUFFER_SIZE]; +static uint8_t tdo_buffer[ARMJTAGEW_TAP_BUFFER_SIZE]; + +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; +}; + +#define MAX_PENDING_SCAN_RESULTS 256 + +static int pending_scan_results_length; +static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS]; + +static int last_tms; + +static void armjtagew_tap_init(void) +{ + tap_length = 0; + pending_scan_results_length = 0; +} + +static void armjtagew_tap_ensure_space(int scans, int bits) +{ + int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length; + int available_bits = ARMJTAGEW_TAP_BUFFER_SIZE * 8 - tap_length; + + if (scans > available_scans || bits > available_bits) + { + armjtagew_tap_execute(); + } +} + +static void armjtagew_tap_append_step(int tms, int tdi) +{ + last_tms = tms; + int index = tap_length / 8; + + if (index < ARMJTAGEW_TAP_BUFFER_SIZE) + { + int bit_index = tap_length % 8; + uint8_t bit = 1 << bit_index; + + if (tms) + { + tms_buffer[index] |= bit; + } + else + { + tms_buffer[index] &= ~bit; + } + + if (tdi) + { + tdi_buffer[index] |= bit; + } + else + { + tdi_buffer[index] &= ~bit; + } + + tap_length++; + } + else + { + LOG_ERROR("armjtagew_tap_append_step, overflow"); + } +} + +void armjtagew_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command) +{ + 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++) + { + armjtagew_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. */ +static int armjtagew_tap_execute(void) +{ + int byte_length; + int tms_offset; + int tdi_offset; + int i; + int result; + + if (tap_length > 0) + { + /* Pad last byte so that tap_length is divisible by 8 */ + while (tap_length % 8 != 0) + { + /* More of the last TMS value keeps us in the same state, + * analogous to free-running JTAG interfaces. */ + armjtagew_tap_append_step(last_tms, 0); + } + + byte_length = tap_length / 8; + + usb_out_buffer[0] = CMD_TAP_SHIFT; + buf_set_u32(usb_out_buffer + 1, 0, 16, byte_length); + + tms_offset = 3; + for (i = 0; i < byte_length; i++) + { + usb_out_buffer[tms_offset + i] = flip_u32(tms_buffer[i],8); + } + + tdi_offset = tms_offset + byte_length; + for (i = 0; i < byte_length; i++) + { + usb_out_buffer[tdi_offset + i] = flip_u32(tdi_buffer[i],8); + } + + result = armjtagew_usb_message(armjtagew_handle, 3 + 2 * byte_length, byte_length + 4); + + if (result == 0) + { + int stat; + + stat = (int)buf_get_u32(usb_in_buffer + byte_length, 0, 32); + if (stat) { + LOG_ERROR("armjtagew_tap_execute, emulator returned error code %d for a CMD_TAP_SHIFT command", stat); + return ERROR_JTAG_QUEUE_FAILED; + } + + for (i = 0; i < byte_length; i++) + { + tdo_buffer[i] = flip_u32(usb_in_buffer[i],8); + } + + 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); + + DEBUG_JTAG_IO("pending scan result, length = %d", length); + +#ifdef _DEBUG_USB_COMMS_ + armjtagew_debug_buffer(buffer, byte_length); +#endif + + if (jtag_read_buffer(buffer, command) != ERROR_OK) + { + armjtagew_tap_init(); + return ERROR_JTAG_QUEUE_FAILED; + } + + if (pending_scan_result->buffer != NULL) + { + free(pending_scan_result->buffer); + } + } + } + else + { + LOG_ERROR("armjtagew_tap_execute, wrong result %d, expected %d", result, byte_length); + return ERROR_JTAG_QUEUE_FAILED; + } + + armjtagew_tap_init(); + } + + return ERROR_OK; +} + +/*****************************************************************************/ +/* JLink USB low-level functions */ + +static struct armjtagew* armjtagew_usb_open() +{ + usb_init(); + + const uint16_t vids[] = { USB_VID, 0 }; + const uint16_t pids[] = { USB_PID, 0 }; + struct usb_dev_handle *dev; + if (jtag_usb_open(vids, pids, &dev) != ERROR_OK) + return NULL; + + struct armjtagew *result = malloc(sizeof(struct armjtagew)); + result->usb_handle = dev; + +#if 0 + /* usb_set_configuration required under win32 */ + usb_set_configuration(dev, dev->config[0].bConfigurationValue); +#endif + usb_claim_interface(dev, 0); +#if 0 + /* + * This makes problems under Mac OS X. And is not needed + * under Windows. Hopefully this will not break a linux build + */ + usb_set_altinterface(dev, 0); +#endif + return result; +} + +static void armjtagew_usb_close(struct armjtagew *armjtagew) +{ + usb_close(armjtagew->usb_handle); + free(armjtagew); +} + +/* Send a message and receive the reply. */ +static int armjtagew_usb_message(struct armjtagew *armjtagew, int out_length, int in_length) +{ + int result; + + result = armjtagew_usb_write(armjtagew, out_length); + if (result == out_length) + { + result = armjtagew_usb_read(armjtagew, in_length); + if (result != in_length) + { + 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; + } + return 0; +} + +/* Write data from out_buffer to USB. */ +static int armjtagew_usb_write(struct armjtagew *armjtagew, int out_length) +{ + int result; + + if (out_length > ARMJTAGEW_OUT_BUFFER_SIZE) + { + LOG_ERROR("armjtagew_write illegal out_length=%d (max=%d)", out_length, ARMJTAGEW_OUT_BUFFER_SIZE); + return -1; + } + + result = usb_bulk_write(armjtagew->usb_handle, ARMJTAGEW_EPT_BULK_OUT, \ + (char*)usb_out_buffer, out_length, ARMJTAGEW_USB_TIMEOUT); + + DEBUG_JTAG_IO("armjtagew_usb_write, out_length = %d, result = %d", out_length, result); + +#ifdef _DEBUG_USB_COMMS_ + armjtagew_debug_buffer(usb_out_buffer, out_length); +#endif + return result; +} + +/* Read data from USB into in_buffer. */ +static int armjtagew_usb_read(struct armjtagew *armjtagew, int exp_in_length) +{ + int result = usb_bulk_read(armjtagew->usb_handle, ARMJTAGEW_EPT_BULK_IN, \ + (char*)usb_in_buffer, exp_in_length, ARMJTAGEW_USB_TIMEOUT); + + DEBUG_JTAG_IO("armjtagew_usb_read, result = %d", result); + +#ifdef _DEBUG_USB_COMMS_ + armjtagew_debug_buffer(usb_in_buffer, result); +#endif + return result; +} + + +#ifdef _DEBUG_USB_COMMS_ +#define BYTES_PER_LINE 16 + +static void armjtagew_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 + |