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#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <chopstx.h>
#include "sys.h" /* for set_led */
#include "usb_lld.h" /* for set_led */
static chopstx_mutex_t mtx;
static chopstx_cond_t cnd0;
static chopstx_cond_t cnd1;
chopstx_mutex_t usb_mtx;
chopstx_cond_t cnd_usb;
static uint8_t u, v;
static uint8_t m; /* 0..100 */
static void *
pwm (void *arg)
{
(void)arg;
chopstx_mutex_lock (&mtx);
chopstx_cond_wait (&cnd0, &mtx);
chopstx_mutex_unlock (&mtx);
while (1)
{
set_led (u&v);
chopstx_usec_wait (m);
set_led (0);
chopstx_usec_wait (100-m);
}
return NULL;
}
static void *
blk (void *arg)
{
(void)arg;
chopstx_mutex_lock (&mtx);
chopstx_cond_wait (&cnd1, &mtx);
chopstx_mutex_unlock (&mtx);
while (1)
{
v = 0;
chopstx_usec_wait (200*1000);
v = 1;
chopstx_usec_wait (200*1000);
}
return NULL;
}
#define INTR_REQ_USB 20
static void *
usb_intr (void *arg)
{
extern void usb_lld_init (uint8_t feature);
extern void usb_interrupt_handler (void);
chopstx_intr_t interrupt;
(void)arg;
asm volatile ("cpsid i" : : : "memory");
/* Disable because of usb_lld_init assumes interrupt handler. */
usb_lld_init (0x80); /* Bus powered. */
chopstx_claim_irq (&interrupt, INTR_REQ_USB);
/* Enable */
asm volatile ("cpsie i" : : : "memory");
while (1)
{
chopstx_intr_wait (&interrupt);
/* Process interrupt. */
usb_interrupt_handler ();
}
chopstx_release_irq (&interrupt);
return NULL;
}
#define PRIO_PWM 3
#define PRIO_BLK 2
#define PRIO_INTR 4
extern uint8_t __process1_stack_base__, __process1_stack_size__;
extern uint8_t __process2_stack_base__, __process2_stack_size__;
extern uint8_t __process3_stack_base__, __process3_stack_size__;
const uint32_t __stackaddr_pwm = (uint32_t)&__process1_stack_base__;
const size_t __stacksize_pwm = (size_t)&__process1_stack_size__;
const uint32_t __stackaddr_blk = (uint32_t)&__process2_stack_base__;
const size_t __stacksize_blk = (size_t)&__process2_stack_size__;
const uint32_t __stackaddr_intr = (uint32_t)&__process3_stack_base__;
const size_t __stacksize_intr = (size_t)&__process3_stack_size__;
static char hexchar (uint8_t x)
{
if (x <= 0x09)
return '0' + x;
else if (x <= 0x0f)
return 'a' + x - 10;
else
return '?';
}
int
main (int argc, const char *argv[])
{
uint8_t count;
(void)argc;
(void)argv;
chopstx_mutex_init (&mtx);
chopstx_cond_init (&cnd0);
chopstx_cond_init (&cnd1);
chopstx_mutex_init (&usb_mtx);
chopstx_cond_init (&cnd_usb);
m = 10;
chopstx_create (PRIO_PWM, __stackaddr_pwm, __stacksize_pwm, pwm, NULL);
chopstx_create (PRIO_BLK, __stackaddr_blk, __stacksize_blk, blk, NULL);
chopstx_create (PRIO_INTR, __stackaddr_intr, __stacksize_intr,
usb_intr, NULL);
chopstx_usec_wait (200*1000);
chopstx_mutex_lock (&mtx);
chopstx_cond_signal (&cnd0);
chopstx_cond_signal (&cnd1);
chopstx_mutex_unlock (&mtx);
while (1)
{
extern uint8_t connected;
count= 0;
u = 1;
/* waiting USB connection */
chopstx_mutex_lock (&usb_mtx);
if (!connected)
chopstx_cond_wait (&cnd_usb, &usb_mtx);
chopstx_mutex_unlock (&usb_mtx);
while (1)
{
char s[32];
u ^= 1;
chopstx_usec_wait (200*1000*6);
memcpy (s, "xx: Hello, World with Chopstx!\r\n", 32);
s[0] = hexchar (count >> 4);
s[1] = hexchar (count & 0x0f);
count++;
chopstx_mutex_lock (&usb_mtx);
if (connected)
{
usb_lld_write (ENDP1, s, 32);
chopstx_cond_wait (&cnd_usb, &usb_mtx);
}
else
break;
chopstx_mutex_unlock (&usb_mtx);
}
chopstx_mutex_unlock (&usb_mtx);
}
return 0;
}
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