From 7ba1753f4c2bdd08f9fd88445ecc988100605199 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 24 Jun 2018 16:34:16 +0200
Subject: [PATCH] A hacky USB reset

---
 Src/main.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Src/main.c b/Src/main.c
index 1c016c3..1810399 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -102,6 +102,18 @@ int main(void)
 
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
+
+  // A hack to let USB host reset us
+  LL_GPIO_InitTypeDef gpio;
+  gpio.Pin = LL_GPIO_PIN_12 | LL_GPIO_PIN_13;
+  gpio.Mode = LL_GPIO_MODE_OUTPUT;
+  gpio.Speed = LL_GPIO_SPEED_FREQ_HIGH;
+  gpio.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
+  LL_GPIO_Init(GPIOA, &gpio);
+  LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_12);
+  LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_13);
+  LL_mDelay(1000);
+
   MX_I2C1_Init();
   MX_I2C2_Init();
   MX_USB_PCD_Init();
-- 
2.39.2