embed: fix sdcard issue

embed/boardloader/lowlevel.c

@@ -32,6 +32,7 @@
     #define WANT_WRP_SECTORS (0)
 #endif
 
+// BOR LEVEL 3: Reset level threshold is around 2.5 V
 #define WANT_BOR_LEVEL (OB_BOR_LEVEL3)
 
 // reference RM0090 section 3.9.10; SPRMOD is 0 meaning PCROP disabled.; DB1M is 0 because we use 2MB dual-bank; BFB2 is 0 allowing boot from flash;

embed/trezorhal/sdcard.c

@@ -70,16 +70,9 @@ static inline void sdcard_default_pin_state(void) {
     HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
 
     // configure SD GPIO
-#if 1
     GPIO_InitStructure.Mode  = GPIO_MODE_OUTPUT_PP;
     GPIO_InitStructure.Pull  = GPIO_NOPULL;
     GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-#else
-    GPIO_InitStructure.Mode      = GPIO_MODE_AF_PP;
-    GPIO_InitStructure.Pull      = GPIO_PULLUP;
-    GPIO_InitStructure.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
-    GPIO_InitStructure.Alternate = GPIO_AF12_SDIO;
-#endif
     GPIO_InitStructure.Pin   = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
     HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
     GPIO_InitStructure.Pin   = GPIO_PIN_2;
@@ -95,6 +88,7 @@ static inline void sdcard_default_pin_state(void) {
 
 static inline void sdcard_active_pin_state(void) {
     HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0,  GPIO_PIN_RESET);  // SD_ON/PC0
+    HAL_Delay(10); // we need to wait until the circuit fully kicks-in
 
     GPIO_InitTypeDef GPIO_InitStructure;
 

embed/trezorhal/touch.c

@@ -60,6 +60,8 @@ static inline void touch_default_pin_state(void) {
 
 static inline void touch_active_pin_state(void) {
     HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10, GPIO_PIN_RESET);  // CTP_ON/PB10
+    HAL_Delay(10); // we need to wait until the circuit fully kicks-in
+
     HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_SET);     // CTP_REST/PC5
 
     GPIO_InitTypeDef GPIO_InitStructure;