diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/stm32f1/usbserial.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/stm32f1/usbserial.c b/src/stm32f1/usbserial.c index 067bba07..f9e46d8c 100644 --- a/src/stm32f1/usbserial.c +++ b/src/stm32f1/usbserial.c @@ -10,6 +10,8 @@ #include "board/usb_cdc_ep.h" // USB_CDC_EP_BULK_IN #include "sched.h" // DECL_INIT #include "stm32f1xx.h" // USB +#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetOutputPin +#include "stm32f1xx_ll_utils.h" // LL_mDelay /**************************************************************** @@ -218,6 +220,12 @@ usb_set_configure(void) void usb_init(void) { + // Pull the D+ pin low briefly to signal a new connection + LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_12); + LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_OUTPUT); + LL_mDelay(5); + LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_FLOATING); + // Setup USB packet memory btable_configure(); |