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add USB disconnect functionnality for maple mini to force re-enumerate

This commit is contained in:
King Kévin 2016-01-29 00:35:54 +01:00
parent 3a76222050
commit 9c19273ecd
1 changed files with 13 additions and 1 deletions
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14
lib/usb_cdcacm.c
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@ -295,12 +295,24 @@ static void cdcacm_set_config(usbd_device *usbd_dev, uint16_t wValue)
void cdcacm_setup(void)
{
/* short USB disconnect to force re-enumerate */
#ifdef SYSTEM_BOARD
// 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);
for (uint32_t i = 0; i < 0x1000; i++) {
for (uint32_t i = 0; i < 0x8000; i++) {
__asm__("nop");
}
#elif MAPLE_MINI
// disconnect USB D+ using dedicated DISC line/circuit on PB9
rcc_periph_clock_enable(RCC_GPIOB);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
gpio_set(GPIOB, GPIO9);
for (uint32_t i = 0; i < 0x800; i++) {
__asm__("nop");
}
gpio_clear(GPIOB, GPIO9);
#endif
/* initialize USB */
usb_device = usbd_init(&st_usbfs_v1_usb_driver, &device_descriptor, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));