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Only sleep mode can be used for USB suspend on STM32F103.

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This commit is contained in:
NIIBE Yutaka
2017-11-16 12:19:25 +09:00
parent 3552fc5615
commit d745c9fdb9
2 changed files with 33 additions and 23 deletions
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15
mcu/usb-stm32f103.c
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@@ -29,7 +29,6 @@
#include <stdint.h>
#include <stdlib.h>
#include "mcu/stm32f103.h"
#include "sys-stm32f103.h"
#include "usb_lld.h"
#include "usb_lld_driver.h"
@@ -343,9 +342,19 @@ void usb_lld_init (struct usb_dev *dev, uint8_t feature)
st103_set_cntr (CNTR_CTRM | CNTR_OVRM | CNTR_ERRM
| CNTR_WKUPM | CNTR_SUSPM | CNTR_RESETM);
/* Setting of EXTI wakeup event to break sleep on WFE. */
EXTI->RTSR |= (1 << 18); /* Rising trigger selection */
#if 0
/*
* Since stop mode makes PLL, HSI & HES oscillators stop, USB clock is
* not supplied in stop mode. Thus, USB wakeup can't occur.
*
* So, only sleep mode can be supported with USB, which doesn't
* require use of EXTI.
*/
#include "mcu/stm32f103.h"
/* Setting of EXTI wakeup event to break stop mode. */
EXTI->EMR |= (1 << 18); /* Event mask cleared */
EXTI->RTSR |= (1 << 18); /* Rising trigger selection */
#endif
}
void usb_lld_prepare_shutdown (void)