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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-10-04 03:50:19 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-10-11 10:50:51 -0400 |
| commit | b8745bc97361fc21e708a0079fe0e808b0b0d010 (patch) | |
| tree | bba7ae9fba7451d881f8efc5fc7fad003f210138 | |
| parent | bc5e961d735f2994fab8f13cb2c39190c515774d (diff) | |
| download | kutter-b8745bc97361fc21e708a0079fe0e808b0b0d010.tar.gz kutter-b8745bc97361fc21e708a0079fe0e808b0b0d010.tar.xz kutter-b8745bc97361fc21e708a0079fe0e808b0b0d010.zip | |
stm32f1: Pull the USB D+ line low briefly to signal a device connect
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
| -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(); |