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fix example-cdc/sample.c

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NIIBE Yutaka
2013-06-19 09:14:40 +09:00
parent 7f2415f3a2
commit b656357563
2 changed files with 21 additions and 4 deletions
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5
ChangeLog
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@@ -1,3 +1,8 @@
2013-06-19 Niibe Yutaka <gniibe@fsij.org>
* example-cdc/sample.c (usb_intr): No disable/enable interrupt,
but call the handler.
2013-06-13 Niibe Yutaka <gniibe@fsij.org>
* chopstx.c (chopstx_usec_wait_var): Rename (was:

20
example-cdc/sample.c
View File

@@ -66,12 +66,24 @@ usb_intr (void *arg)
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");
/*
* When USB interrupt occurs between usb_lld_init (which assumes
* ISR) and chopstx_claim_irq (which clears pending interrupt),
* invocation of usb_interrupt_handler won't occur.
*
* We can't call usb_lld_init after chopstx_claim_irq, as
* usb_lld_init does its own setting for NVIC. Calling
* chopstx_claim_irq after usb_lld_init overrides that.
*
* Calling usb_interrupt_handler is no harm even if there were no
* interrupts, thus, we call it unconditionally here, just in case
* if there is a request.
*
*/
usb_interrupt_handler ();
while (1)
{