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|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
* Copyright (C) 2009 by Dimitar Dimitrov <dinuxbg@gmail.com> *
* based on Dominic Rath's and Benedikt Sauter's usbprog.c *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jtag/interface.h>
#include <jtag/commands.h>
#include "helper/system.h"
#include "libusb_helper.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 libusb_device_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) {
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);
armjtagew_end_state(cmd->cmd.runtest->end_state);
armjtagew_runtest(cmd->cmd.runtest->num_cycles);
break;
case JTAG_TLR_RESET:
LOG_DEBUG_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:
LOG_DEBUG_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:
LOG_DEBUG_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);
LOG_DEBUG_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:
LOG_DEBUG_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:
LOG_DEBUG_IO("sleep %" PRIu32, 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*1000);
result = armjtagew_usb_message(armjtagew_handle, 5, 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) / 1000;
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_speed_div(int speed, int *khz)
{
*khz = speed;
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");
/* Initial JTAG speed (for reset and initialization): 32 kHz */
armjtagew_speed(32);
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);
/* Only move if we're not already there */
if (tap_get_state() != tap_get_end_state())
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",
(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");
} else
LOG_ERROR("ARM-JTAG-EW command CMD_GET_TAPHW_STATE failed (%d)", 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)", 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);
if (1 != usb_in_buffer[1] || 6 != usb_in_buffer[0])
LOG_WARNING(
"ARM-JTAG-EW firmware version %d.%d is untested with this version of OpenOCD. You might experience unexpected behavior.",
usb_in_buffer[1],
usb_in_buffer[0]);
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",
.usage = "",
},
COMMAND_REGISTRATION_DONE
};
static struct jtag_interface armjtagew_interface = {
.execute_queue = armjtagew_execute_queue,
};
struct adapter_driver armjtagew_adapter_driver = {
.name = "arm-jtag-ew",
.transports = jtag_only,
.commands = armjtagew_command_handlers,
.init = armjtagew_init,
.quit = armjtagew_quit,
.speed = armjtagew_speed,
.khz = armjtagew_khz,
.speed_div = armjtagew_speed_div,
.jtag_ops = &armjtagew_interface,
};
/**************************************************************************
* 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_local = tap_length / 8;
if (index_local < ARMJTAGEW_TAP_BUFFER_SIZE) {
int bit_index = tap_length % 8;
uint8_t bit = 1 << bit_index;
if (tms)
tms_buffer[index_local] |= bit;
else
tms_buffer[index_local] &= ~bit;
if (tdi)
tdi_buffer[index_local] |= bit;
else
tdi_buffer[index_local] &= ~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_local;
stat_local = (int)buf_get_u32(usb_in_buffer + byte_length, 0, 32);
if (stat_local) {
LOG_ERROR(
"armjtagew_tap_execute, emulator returned error code %d for a CMD_TAP_SHIFT command",
stat_local);
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);
LOG_DEBUG_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;
}
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(void)
{
const uint16_t vids[] = { USB_VID, 0 };
const uint16_t pids[] = { USB_PID, 0 };
struct libusb_device_handle *dev;
if (jtag_libusb_open(vids, pids, &dev, NULL) != ERROR_OK)
return NULL;
struct armjtagew *result = malloc(sizeof(struct armjtagew));
result->usb_handle = dev;
#if 0
/* libusb_set_configuration required under win32 */
struct libusb_config_descriptor *config;
struct libusb_device *usb_dev = libusb_get_device(dev);
libusb_get_config_descriptor(usb_dev, 0, &config);
libusb_set_configuration(dev, config->bConfigurationValue);
#endif
libusb_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
*/
libusb_set_interface_alt_setting(dev, 0, 0);
#endif
return result;
}
static void armjtagew_usb_close(struct armjtagew *armjtagew)
{
libusb_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("jtag_libusb_bulk_read failed (requested=%d, result=%d)",
in_length,
result);
return -1;
}
} else {
LOG_ERROR("jtag_libusb_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;
int transferred;
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 = jtag_libusb_bulk_write(armjtagew->usb_handle, ARMJTAGEW_EPT_BULK_OUT,
(char *)usb_out_buffer, out_length, ARMJTAGEW_USB_TIMEOUT, &transferred);
LOG_DEBUG_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
if (result != ERROR_OK)
return -1;
return transferred;
}
/* Read data from USB into in_buffer. */
static int armjtagew_usb_read(struct armjtagew *armjtagew, int exp_in_length)
{
int transferred;
int result = jtag_libusb_bulk_read(armjtagew->usb_handle, ARMJTAGEW_EPT_BULK_IN,
(char *)usb_in_buffer, exp_in_length, ARMJTAGEW_USB_TIMEOUT, &transferred);
LOG_DEBUG_IO("armjtagew_usb_read, result = %d", result);
#ifdef _DEBUG_USB_COMMS_
armjtagew_debug_buffer(usb_in_buffer, result);
#endif
if (result != ERROR_OK)
return -1;
return transferred;
}
#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);
/* Prevent GDB timeout (writing to log might take some time) */
keep_alive();
}
}
#endif
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