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pigpio/x_pigpiod_if.c

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/*
gcc -Wall -pthread -o x_pigpiod_if x_pigpiod_if.c -lpigpiod_if
./x_pigpiod_if
*** WARNING ************************************************
* *
* All the tests make extensive use of gpio 25 (pin 22). *
* Ensure that either nothing or just a LED is connected to *
* gpio 25 before running any of the tests. *
* *
* Some tests are statistical in nature and so may on *
* occasion fail. Repeated failures on the same test or *
* many failures in a group of tests indicate a problem. *
************************************************************
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include "pigpiod_if.h"
#define GPIO 25
void CHECK(int t, int st, int got, int expect, int pc, char *desc)
{
if ((got >= (((1E2-pc)*expect)/1E2)) && (got <= (((1E2+pc)*expect)/1E2)))
{
printf("TEST %2d.%-2d PASS (%s: %d)\n", t, st, desc, expect);
}
else
{
fprintf(stderr,
"TEST %2d.%-2d FAILED got %d (%s: %d)\n",
t, st, got, desc, expect);
}
}
void t0()
{
printf("\nTesting pigpiod C I/F 1\n");
printf("pigpio version %d.\n", get_pigpio_version());
printf("Hardware revision %d.\n", get_hardware_revision());
}
void t1()
{
int v;
printf("Mode/PUD/read/write tests.\n");
set_mode(GPIO, PI_INPUT);
v = get_mode(GPIO);
CHECK(1, 1, v, 0, 0, "set mode, get mode");
set_pull_up_down(GPIO, PI_PUD_UP);
v = gpio_read(GPIO);
CHECK(1, 2, v, 1, 0, "set pull up down, read");
set_pull_up_down(GPIO, PI_PUD_DOWN);
v = gpio_read(GPIO);
CHECK(1, 3, v, 0, 0, "set pull up down, read");
gpio_write(GPIO, PI_LOW);
v = get_mode(GPIO);
CHECK(1, 4, v, 1, 0, "write, get mode");
v = gpio_read(GPIO);
CHECK(1, 5, v, 0, 0, "read");
gpio_write(GPIO, PI_HIGH);
v = gpio_read(GPIO);
CHECK(1, 6, v, 1, 0, "write, read");
}
int t2_count=0;
void t2cb(unsigned gpio, unsigned level, uint32_t tick)
{
t2_count++;
}
void t2()
{
int dc, f, r, rr, oc;
printf("PWM dutycycle/range/frequency tests.\n");
set_PWM_range(GPIO, 255);
set_PWM_frequency(GPIO, 0);
f = get_PWM_frequency(GPIO);
CHECK(2, 1, f, 10, 0, "set PWM range, set/get PWM frequency");
callback(GPIO, EITHER_EDGE, t2cb);
set_PWM_dutycycle(GPIO, 0);
dc = get_PWM_dutycycle(GPIO);
CHECK(2, 2, dc, 0, 0, "get PWM dutycycle");
time_sleep(0.5); /* allow old notifications to flush */
oc = t2_count;
time_sleep(2);
f = t2_count - oc;
CHECK(2, 3, f, 0, 0, "set PWM dutycycle, callback");
set_PWM_dutycycle(GPIO, 128);
dc = get_PWM_dutycycle(GPIO);
CHECK(2, 4, dc, 128, 0, "get PWM dutycycle");
time_sleep(0.2);
oc = t2_count;
time_sleep(2);
f = t2_count - oc;
CHECK(2, 5, f, 40, 5, "set PWM dutycycle, callback");
set_PWM_frequency(GPIO, 100);
f = get_PWM_frequency(GPIO);
CHECK(2, 6, f, 100, 0, "set/get PWM frequency");
time_sleep(0.2);
oc = t2_count;
time_sleep(2);
f = t2_count - oc;
CHECK(2, 7, f, 400, 1, "callback");
set_PWM_frequency(GPIO, 1000);
f = get_PWM_frequency(GPIO);
CHECK(2, 8, f, 1000, 0, "set/get PWM frequency");
time_sleep(0.2);
oc = t2_count;
time_sleep(2);
f = t2_count - oc;
CHECK(2, 9, f, 4000, 1, "callback");
r = get_PWM_range(GPIO);
CHECK(2, 10, r, 255, 0, "get PWM range");
rr = get_PWM_real_range(GPIO);
CHECK(2, 11, rr, 200, 0, "get PWM real range");
set_PWM_range(GPIO, 2000);
r = get_PWM_range(GPIO);
CHECK(2, 12, r, 2000, 0, "set/get PWM range");
rr = get_PWM_real_range(GPIO);
CHECK(2, 13, rr, 200, 0, "get PWM real range");
set_PWM_dutycycle(GPIO, 0);
}
int t3_reset=1;
int t3_count=0;
uint32_t t3_tick=0;
float t3_on=0.0;
float t3_off=0.0;
void t3cbf(unsigned gpio, unsigned level, uint32_t tick)
{
uint32_t td;
if (t3_reset)
{
t3_count = 0;
t3_on = 0.0;
t3_off = 0.0;
t3_reset = 0;
}
else
{
td = tick - t3_tick;
if (level == 0) t3_on += td;
else t3_off += td;
}
t3_count ++;
t3_tick = tick;
}
void t3()
{
int pw[3]={500, 1500, 2500};
int dc[4]={20, 40, 60, 80};
int f, rr, v;
float on, off;
int t;
printf("PWM/Servo pulse accuracy tests.\n");
callback(GPIO, EITHER_EDGE, t3cbf);
for (t=0; t<3; t++)
{
set_servo_pulsewidth(GPIO, pw[t]);
v = get_servo_pulsewidth(GPIO);
CHECK(3, t+t+1, v, pw[t], 0, "get servo pulsewidth");
time_sleep(1);
t3_reset = 1;
time_sleep(4);
on = t3_on;
off = t3_off;
CHECK(3, t+t+2, (1000.0*(on+off))/on, 20000000.0/pw[t], 1,
"set servo pulsewidth");
}
set_servo_pulsewidth(GPIO, 0);
set_PWM_frequency(GPIO, 1000);
f = get_PWM_frequency(GPIO);
CHECK(3, 7, f, 1000, 0, "set/get PWM frequency");
rr = set_PWM_range(GPIO, 100);
CHECK(3, 8, rr, 200, 0, "set PWM range");
for (t=0; t<4; t++)
{
set_PWM_dutycycle(GPIO, dc[t]);
v = get_PWM_dutycycle(GPIO);
CHECK(3, t+t+9, v, dc[t], 0, "get PWM dutycycle");
time_sleep(1);
t3_reset = 1;
time_sleep(2);
on = t3_on;
off = t3_off;
CHECK(3, t+t+10, (1000.0*on)/(on+off), 10.0*dc[t], 1,
"set PWM dutycycle");
}
set_PWM_dutycycle(GPIO, 0);
}
void t4()
{
int h, e, f, n, s, b, l, seq_ok, toggle_ok;
gpioReport_t r;
char p[32];
printf("Pipe notification tests.\n");
set_PWM_frequency(GPIO, 0);
set_PWM_dutycycle(GPIO, 0);
set_PWM_range(GPIO, 100);
h = notify_open();
e = notify_begin(h, (1<<GPIO));
CHECK(4, 1, e, 0, 0, "notify open/begin");
time_sleep(1);
sprintf(p, "/dev/pigpio%d", h);
f = open(p, O_RDONLY);
set_PWM_dutycycle(GPIO, 50);
time_sleep(4);
set_PWM_dutycycle(GPIO, 0);
e = notify_pause(h);
CHECK(4, 2, e, 0, 0, "notify pause");
e = notify_close(h);
CHECK(4, 3, e, 0, 0, "notify close");
n = 0;
s = 0;
l = 0;
seq_ok = 1;
toggle_ok = 1;
while (1)
{
b = read(f, &r, 12);
if (b == 12)
{
if (s != r.seqno) seq_ok = 0;
if (n) if (l != (r.level&(1<<GPIO))) toggle_ok = 0;
if (r.level&(1<<GPIO)) l = 0;
else l = (1<<GPIO);
s++;
n++;
// printf("%d %d %d %X\n", r.seqno, r.flags, r.tick, r.level);
}
else break;
}
close(f);
CHECK(4, 4, seq_ok, 1, 0, "sequence numbers ok");
CHECK(4, 5, toggle_ok, 1, 0, "gpio toggled ok");
CHECK(4, 6, n, 80, 10, "number of notifications");
}
int t5_count = 0;
void t5cbf(unsigned gpio, unsigned level, uint32_t tick)
{
t5_count++;
}
void t5()
{
int BAUD=4800;
char *TEXT=
"\n\
Now is the winter of our discontent\n\
Made glorious summer by this sun of York;\n\
And all the clouds that lour'd upon our house\n\
In the deep bosom of the ocean buried.\n\
Now are our brows bound with victorious wreaths;\n\
Our bruised arms hung up for monuments;\n\
Our stern alarums changed to merry meetings,\n\
Our dreadful marches to delightful measures.\n\
Grim-visaged war hath smooth'd his wrinkled front;\n\
And now, instead of mounting barded steeds\n\
To fright the souls of fearful adversaries,\n\
He capers nimbly in a lady's chamber\n\
To the lascivious pleasing of a lute.\n\
";
gpioPulse_t wf[] =
{
{1<<GPIO, 0, 10000},
{0, 1<<GPIO, 30000},
{1<<GPIO, 0, 60000},
{0, 1<<GPIO, 100000},
};
int e, oc, c, wid;
char text[2048];
printf("Waveforms & serial read/write tests.\n");
callback(GPIO, FALLING_EDGE, t5cbf);
set_mode(GPIO, PI_OUTPUT);
e = wave_clear();
CHECK(5, 1, e, 0, 0, "callback, set mode, wave clear");
e = wave_add_generic(4, wf);
CHECK(5, 2, e, 4, 0, "pulse, wave add generic");
wid = wave_create();
e = wave_send_repeat(wid);
if (e < 14) CHECK(5, 3, e, 9, 0, "wave tx repeat");
else CHECK(5, 3, e, 19, 0, "wave tx repeat");
oc = t5_count;
time_sleep(5.05);
c = t5_count - oc;
CHECK(5, 4, c, 50, 2, "callback");
e = wave_tx_stop();
CHECK(5, 5, e, 0, 0, "wave tx stop");
e = bb_serial_read_open(GPIO, BAUD, 8);
CHECK(5, 6, e, 0, 0, "serial read open");
wave_clear();
e = wave_add_serial(GPIO, BAUD, 8, 2, 5000000, strlen(TEXT), TEXT);
CHECK(5, 7, e, 3405, 0, "wave clear, wave add serial");
wid = wave_create();
e = wave_send_once(wid);
if (e < 6964) CHECK(5, 8, e, 6811, 0, "wave tx start");
else CHECK(5, 8, e, 7116, 0, "wave tx start");
oc = t5_count;
time_sleep(3);
c = t5_count - oc;
CHECK(5, 9, c, 0, 0, "callback");
oc = t5_count;
while (wave_tx_busy()) time_sleep(0.1);
time_sleep(0.1);
c = t5_count - oc;
CHECK(5, 10, c, 1702, 0, "wave tx busy, callback");
c = bb_serial_read(GPIO, text, sizeof(text)-1);
if (c > 0) text[c] = 0; /* null terminate string */
CHECK(5, 11, strcmp(TEXT, text), 0, 0, "wave tx busy, serial read");
e = bb_serial_read_close(GPIO);
CHECK(5, 12, e, 0, 0, "serial read close");
c = wave_get_micros();
CHECK(5, 13, c, 6158148, 0, "wave get micros");
c = wave_get_high_micros();
if (c > 6158148) c = 6158148;
CHECK(5, 14, c, 6158148, 0, "wave get high micros");
c = wave_get_max_micros();
CHECK(5, 15, c, 1800000000, 0, "wave get max micros");
c = wave_get_pulses();
CHECK(5, 16, c, 3405, 0, "wave get pulses");
c = wave_get_high_pulses();
CHECK(5, 17, c, 3405, 0, "wave get high pulses");
c = wave_get_max_pulses();
CHECK(5, 18, c, 12000, 0, "wave get max pulses");
c = wave_get_cbs();
if (c < 6963) CHECK(5, 19, c, 6810, 0, "wave get cbs");
else CHECK(5, 19, c, 7115, 0, "wave get cbs");
c = wave_get_high_cbs();
if (c < 6963) CHECK(5, 20, c, 6810, 0, "wave get high cbs");
else CHECK(5, 20, c, 7115, 0, "wave get high cbs");
c = wave_get_max_cbs();
CHECK(5, 21, c, 25016, 0, "wave get max cbs");
}
int t6_count=0;
int t6_on=0;
uint32_t t6_on_tick=0;
void t6cbf(unsigned gpio, unsigned level, uint32_t tick)
{
if (level == 1)
{
t6_on_tick = tick;
t6_count++;
}
else
{
if (t6_on_tick) t6_on += (tick - t6_on_tick);
}
}
void t6()
{
int tp, t, p;
printf("Trigger tests.\n");
gpio_write(GPIO, PI_LOW);
tp = 0;
callback(GPIO, EITHER_EDGE, t6cbf);
time_sleep(0.2);
for (t=0; t<5; t++)
{
time_sleep(0.1);
p = 10 + (t*10);
tp += p;
gpio_trigger(GPIO, p, 1);
}
time_sleep(0.5);
CHECK(6, 1, t6_count, 5, 0, "gpio trigger count");
CHECK(6, 2, t6_on, tp, 25, "gpio trigger pulse length");
}
int t7_count=0;
void t7cbf(unsigned gpio, unsigned level, uint32_t tick)
{
if (level == PI_TIMEOUT) t7_count++;
}
void t7()
{
int c, oc;
printf("Watchdog tests.\n");
/* type of edge shouldn't matter for watchdogs */
callback(GPIO, FALLING_EDGE, t7cbf);
set_watchdog(GPIO, 50); /* 50 ms, 20 per second */
time_sleep(0.5);
oc = t7_count;
time_sleep(2);
c = t7_count - oc;
CHECK(7, 1, c, 39, 5, "set watchdog on count");
set_watchdog(GPIO, 0); /* 0 switches watchdog off */
time_sleep(0.5);
oc = t7_count;
time_sleep(2);
c = t7_count - oc;
CHECK(7, 2, c, 0, 1, "set watchdog off count");
}
void t8()
{
int v;
printf("Bank read/write tests.\n");
gpio_write(GPIO, 0);
v = read_bank_1() & (1<<GPIO);
CHECK(8, 1, v, 0, 0, "read bank 1");
gpio_write(GPIO, 1);
v = read_bank_1() & (1<<GPIO);
CHECK(8, 2, v, (1<<GPIO), 0, "read bank 1");
clear_bank_1(1<<GPIO);
v = gpio_read(GPIO);
CHECK(8, 3, v, 0, 0, "clear bank 1");
set_bank_1(1<<GPIO);
v = gpio_read(GPIO);
CHECK(8, 4, v, 1, 0, "set bank 1");
v = read_bank_2();
if (v) v = 0; else v = 1;
CHECK(8, 5, v, 0, 0, "read bank 2");
v = clear_bank_2(0);
CHECK(8, 6, v, 0, 0, "clear bank 2");
v = clear_bank_2(0xffffff);
CHECK(8, 7, v, PI_SOME_PERMITTED, 0, "clear bank 2");
v = set_bank_2(0);
CHECK(8, 8, v, 0, 0, "set bank 2");
v = set_bank_2(0xffffff);
CHECK(8, 9, v, PI_SOME_PERMITTED, 0, "set bank 2");
}
int t9_count = 0;
void t9cbf(unsigned gpio, unsigned level, uint32_t tick)
{
t9_count++;
}
void t9()
{
int s, oc, c, e;
uint32_t p[10];
printf("Script store/run/status/stop/delete tests.\n");
gpio_write(GPIO, 0); /* need known state */
/*
100 loops per second
p0 number of loops
p1 GPIO
*/
char *script="\
ld p9 p0\
tag 0\
w p1 1\
mils 5\
w p1 0\
mils 5\
dcr p9\
jp 0";
callback(GPIO, RISING_EDGE, t9cbf);
s = store_script(script);
/* Wait for script to finish initing. */
while (1)
{
time_sleep(0.1);
e = script_status(s, p);
if (e != PI_SCRIPT_INITING) break;
}
oc = t9_count;
p[0] = 99;
p[1] = GPIO;
run_script(s, 2, p);
time_sleep(2);
c = t9_count - oc;
CHECK(9, 1, c, 100, 0, "store/run script");
oc = t9_count;
p[0] = 200;
p[1] = GPIO;
run_script(s, 2, p);
while (1)
{
time_sleep(0.1);
e = script_status(s, p);
if (e != PI_SCRIPT_RUNNING) break;
}
c = t9_count - oc;
time_sleep(0.1);
CHECK(9, 2, c, 201, 0, "run script/script status");
oc = t9_count;
p[0] = 2000;
p[1] = GPIO;
run_script(s, 2, p);
while (1)
{
time_sleep(0.1);
e = script_status(s, p);
if (e != PI_SCRIPT_RUNNING) break;
if (p[9] < 1600) stop_script(s);
}
c = t9_count - oc;
time_sleep(0.1);
CHECK(9, 3, c, 410, 10, "run/stop script/script status");
e = delete_script(s);
CHECK(9, 4, e, 0, 0, "delete script");
}
void ta()
{
int h, b, e;
char *TEXT;
char text[2048];
printf("Serial link tests.\n");
/* this test needs RXD and TXD to be connected */
h = serial_open("/dev/ttyAMA0", 57600, 0);
CHECK(10, 1, h, 0, 0, "serial open");
time_sleep(0.1); /* allow time for transmission */
b = serial_read(h, text, sizeof(text)); /* flush buffer */
b = serial_data_available(h);
CHECK(10, 2, b, 0, 0, "serial data available");
TEXT = "\
To be, or not to be, that is the question-\
Whether 'tis Nobler in the mind to suffer\
The Slings and Arrows of outrageous Fortune,\
Or to take Arms against a Sea of troubles,\
";
e = serial_write(h, TEXT, strlen(TEXT));
CHECK(10, 3, e, 0, 0, "serial write");
e = serial_write_byte(h, 0xAA);
e = serial_write_byte(h, 0x55);
e = serial_write_byte(h, 0x00);
e = serial_write_byte(h, 0xFF);
CHECK(10, 4, e, 0, 0, "serial write byte");
time_sleep(0.1); /* allow time for transmission */
b = serial_data_available(h);
CHECK(10, 5, b, strlen(TEXT)+4, 0, "serial data available");
b = serial_read(h, text, strlen(TEXT));
CHECK(10, 6, b, strlen(TEXT), 0, "serial read");
if (b >= 0) text[b] = 0;
CHECK(10, 7, strcmp(TEXT, text), 0, 0, "serial read");
b = serial_read_byte(h);
CHECK(10, 8, b, 0xAA, 0, "serial read byte");
b = serial_read_byte(h);
CHECK(10, 9, b, 0x55, 0, "serial read byte");
b = serial_read_byte(h);
CHECK(10, 10, b, 0x00, 0, "serial read byte");
b = serial_read_byte(h);
CHECK(10, 11, b, 0xFF, 0, "serial read byte");
b = serial_data_available(h);
CHECK(10, 12, b, 0, 0, "serial data availabe");
e = serial_close(h);
CHECK(10, 13, e, 0, 0, "serial close");
}
void tb()
{
int h, e, b, len;
char *exp;
char buf[128];
printf("SMBus / I2C tests.");
/* this test requires an ADXL345 on I2C bus 1 addr 0x53 */
h = i2c_open(1, 0x53, 0);
CHECK(11, 1, h, 0, 0, "i2c open");
e = i2c_write_device(h, "\x00", 1); /* move to known register */
CHECK(11, 2, e, 0, 0, "i2c write device");
b = i2c_read_device(h, buf, 1);
CHECK(11, 3, b, 1, 0, "i2c read device");
CHECK(11, 4, buf[0], 0xE5, 0, "i2c read device");
b = i2c_read_byte(h);
CHECK(11, 5, b, 0xE5, 0, "i2c read byte");
b = i2c_read_byte_data(h, 0);
CHECK(11, 6, b, 0xE5, 0, "i2c read byte data");
b = i2c_read_byte_data(h, 48);
CHECK(11, 7, b, 2, 0, "i2c read byte data");
exp = "\x1D[aBcDeFgHjKM]";
len = strlen(exp);
e = i2c_write_device(h, exp, len);
CHECK(11, 8, e, 0, 0, "i2c write device");
e = i2c_write_device(h, "\x1D", 1);
b = i2c_read_device(h, buf, len-1);
CHECK(11, 9, b, len-1, 0, "i2c read device");
CHECK(11, 10, strncmp(buf, exp+1, len-1), 0, 0, "i2c read device");
if (strncmp(buf, exp+1, len-1))
printf("got [%.*s] expected [%.*s]\n", len-1, buf, len-1, exp+1);
e = i2c_write_byte_data(h, 0x1d, 0xAA);
CHECK(11, 11, e, 0, 0, "i2c write byte data");
b = i2c_read_byte_data(h, 0x1d);
CHECK(11, 12, b, 0xAA, 0, "i2c read byte data");
e = i2c_write_byte_data(h, 0x1d, 0x55);
CHECK(11, 13, e, 0, 0, "i2c write byte data");
b = i2c_read_byte_data(h, 0x1d);
CHECK(11, 14, b, 0x55, 0, "i2c read byte data");
exp = "[1234567890#]";
len = strlen(exp);
e = i2c_write_block_data(h, 0x1C, exp, len);
CHECK(11, 15, e, 0, 0, "i2c write block data");
e = i2c_write_device(h, "\x1D", 1);
b = i2c_read_device(h, buf, len);
CHECK(11, 16, b, len, 0, "i2c read device");
CHECK(11, 17, strncmp(buf, exp, len), 0, 0, "i2c read device");
if (strncmp(buf, exp, len))
printf("got [%.*s] expected [%.*s]\n", len, buf, len, exp);
b = i2c_read_i2c_block_data(h, 0x1D, buf, len);
CHECK(11, 18, b, len, 0, "i2c read i2c block data");
CHECK(11, 19, strncmp(buf, exp, len), 0, 0, "i2c read i2c block data");
if (strncmp(buf, exp, len))
printf("got [%.*s] expected [%.*s]\n", len, buf, len, exp);
exp = "(-+=;:,<>!%)";
len = strlen(exp);
e = i2c_write_i2c_block_data(h, 0x1D, exp, len);
CHECK(11, 20, e, 0, 0, "i2c write i2c block data");
b = i2c_read_i2c_block_data(h, 0x1D, buf, len);
CHECK(11, 21, b, len, 0, "i2c read i2c block data");
CHECK(11, 22, strncmp(buf, exp, len), 0, 0, "i2c read i2c block data");
if (strncmp(buf, exp, len))
printf("got [%.*s] expected [%.*s]\n", len, buf, len, exp);
e = i2c_close(h);
CHECK(11, 23, e, 0, 0, "i2c close");
}
void tc()
{
int h, x, b, e;
char buf[128];
printf("SPI tests.");
/* this test requires a MCP3202 on SPI channel 1 */
h = spi_open(1, 50000, 0);
CHECK(12, 1, h, 0, 0, "spi open");
for (x=0; x<5; x++)
{
sprintf(buf, "\x01\x80");
b = spi_xfer(h, buf, buf, 3);
CHECK(12, 2, b, 3, 0, "spi xfer");
if (b == 3)
{
time_sleep(1.0);
printf("%d ", ((buf[1]&0x0F)*256)|buf[2]);
}
}
e = spi_close(h);
CHECK(12, 99, e, 0, 0, "spi close");
}
int main(int argc, char *argv[])
{
int i, t, c, status;
char test[64];
if (argc > 1)
{
t = 0;
for (i=0; i<strlen(argv[1]); i++)
{
c = tolower(argv[1][i]);
if (!strchr(test, c))
{
test[t++] = c;
test[t] = 0;
}
}
}
else strcat(test, "0123456789");
status = pigpio_start(0, 0);
if (status < 0)
{
fprintf(stderr, "pigpio initialisation failed.\n");
return 1;
}
printf("Connected to pigpio daemon.\n");
if (strchr(test, '0')) t0();
if (strchr(test, '1')) t1();
if (strchr(test, '2')) t2();
if (strchr(test, '3')) t3();
if (strchr(test, '4')) t4();
if (strchr(test, '5')) t5();
if (strchr(test, '6')) t6();
if (strchr(test, '7')) t7();
if (strchr(test, '8')) t8();
if (strchr(test, '9')) t9();
if (strchr(test, 'a')) ta();
if (strchr(test, 'b')) tb();
if (strchr(test, 'c')) tc();
pigpio_stop();
return 0;
}
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