add USB disconnect functionnality for maple mini to force re-enumerate
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@ -295,12 +295,24 @@ static void cdcacm_set_config(usbd_device *usbd_dev, uint16_t wValue)
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void cdcacm_setup(void)
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void cdcacm_setup(void)
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{
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{
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/* short USB disconnect to force re-enumerate */
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/* short USB disconnect to force re-enumerate */
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#ifdef SYSTEM_BOARD
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// pull USB D+ low for a short while
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rcc_periph_clock_enable(RCC_GPIOA);
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rcc_periph_clock_enable(RCC_GPIOA);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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for (uint32_t i = 0; i < 0x1000; i++) {
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for (uint32_t i = 0; i < 0x8000; i++) {
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__asm__("nop");
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__asm__("nop");
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}
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}
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#elif MAPLE_MINI
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// disconnect USB D+ using dedicated DISC line/circuit on PB9
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rcc_periph_clock_enable(RCC_GPIOB);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO9);
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gpio_set(GPIOB, GPIO9);
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for (uint32_t i = 0; i < 0x800; i++) {
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__asm__("nop");
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}
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gpio_clear(GPIOB, GPIO9);
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#endif
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/* initialize USB */
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/* initialize USB */
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usb_device = usbd_init(&st_usbfs_v1_usb_driver, &device_descriptor, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
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usb_device = usbd_init(&st_usbfs_v1_usb_driver, &device_descriptor, &config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
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