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USB: sleep_ms can't be used for DFU detach (in an interrupt)

This commit is contained in:
King Kévin 2018-03-01 17:45:29 +01:00
parent d8934dc4c5
commit 41976d0af8
1 changed files with 6 additions and 3 deletions
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9
lib/usb_cdcacm.c
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@ -250,14 +250,17 @@ static void usb_disconnect(void)
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_set(GPIOB, GPIO9);
sleep_ms(20); // pull D+ low for at least 10 ms
gpio_clear(GPIOB, GPIO9);
for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
__asm__("nop");
}
#else
// pull USB D+ low for a short while
rcc_periph_clock_enable(RCC_GPIOA);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
gpio_clear(GPIOA, GPIO12);
sleep_ms(20); // pull D+ low for at least 10 ms
for (uint32_t i = 0; i < 0x2000; i++) { // wait for at least 10 ms
__asm__("nop");
}
#endif
}