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stm32l4: Enable PWR module and USV-bit in CR2.

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NIIBE Yutaka
2019-04-18 19:13:23 +09:00
parent 359082f80a
commit 1d2aacd0a4
2 changed files with 8 additions and 1 deletions
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4
mcu/sys-stm32l4.c
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@@ -65,7 +65,9 @@ static struct CRS *const CRS = ((struct CRS *)(APB1PERIPH_BASE + 0x6000));
void
usb_lld_sys_init (void)
{
if ((RCC->APB1ENR1 & RCC_APB1_1_USB)
PWR->CR2 |= (1 << 10); /* USB supply valid */
if ((RCC->APB1ENR1 & RCC_APB1_1_USB)
&& (RCC->APB1RSTR1 & RCC_APB1_1_USB) == 0)
/* Make sure the device is disconnected, even after core reset. */
{