Add ARDUINO_STM32L4_DOSFS_SDCARD to allow microSD override on SPI1

Author: GrumpyOldPizza

Diff for: variants/dragonfly/variant.cpp

@@ -30,6 +30,8 @@
 #include "wiring_private.h"
 #include "dosfs_api.h"
 
+//#define ARDUINO_STM32L4_DOSFS_SDCARD
+
 /*
  * Pins descriptions
  */
@@ -46,10 +48,17 @@ const PinDescription g_APinDescription[NUM_TOTAL_PINS] =
     { GPIOC, GPIO_PIN_MASK(GPIO_PIN_PC8),  GPIO_PIN_PC8_TIM3_CH3,   (PIN_ATTR_PWM | PIN_ATTR_EXTI),                PWM_INSTANCE_TIM3, PWM_CHANNEL_3,    ADC_INPUT_NONE },
     { GPIOA, GPIO_PIN_MASK(GPIO_PIN_PA3),  GPIO_PIN_PA3_TIM5_CH4,   (PIN_ATTR_PWM | PIN_ATTR_EXTI),                PWM_INSTANCE_TIM5, PWM_CHANNEL_4,    ADC_INPUT_NONE },
     { GPIOA, GPIO_PIN_MASK(GPIO_PIN_PA2),  GPIO_PIN_PA2_TIM5_CH3,   (PIN_ATTR_PWM | PIN_ATTR_EXTI),                PWM_INSTANCE_TIM5, PWM_CHANNEL_3,    ADC_INPUT_NONE },
+#if defined(ARDUINO_STM32L4_DOSFS_SDCARD)
+    { NULL,  GPIO_PIN_MASK(GPIO_PIN_PD2),  GPIO_PIN_PD2,            0,                                             PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
+    { NULL,  GPIO_PIN_MASK(GPIO_PIN_PC12), GPIO_PIN_PC12,           0,                                             PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
+    { NULL,  GPIO_PIN_MASK(GPIO_PIN_PC11), GPIO_PIN_PC11,           0,                                             PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
+    { NULL,  GPIO_PIN_MASK(GPIO_PIN_PC10), GPIO_PIN_PC10,           0,                                             PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
+#else /* ARDUINO_STM32L4_DOSFS_SDCARD */
     { GPIOD, GPIO_PIN_MASK(GPIO_PIN_PD2),  GPIO_PIN_PD2,            (PIN_ATTR_EXTI),                               PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
     { GPIOC, GPIO_PIN_MASK(GPIO_PIN_PC12), GPIO_PIN_PC12,           (PIN_ATTR_EXTI),                               PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
     { GPIOC, GPIO_PIN_MASK(GPIO_PIN_PC11), GPIO_PIN_PC11,           (PIN_ATTR_EXTI),                               PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
     { GPIOC, GPIO_PIN_MASK(GPIO_PIN_PC10), GPIO_PIN_PC10,           (PIN_ATTR_EXTI),                               PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_NONE },
+#endif /* ARDUINO_STM32L4_DOSFS_SDCARD */
 
     // 14..19 - Analog pins
     { GPIOA, GPIO_PIN_MASK(GPIO_PIN_PA4),  GPIO_PIN_PA4,            (PIN_ATTR_ADC | PIN_ATTR_DAC | PIN_ATTR_EXTI), PWM_INSTANCE_NONE, PWM_CHANNEL_NONE, ADC_INPUT_9    },
@@ -107,6 +116,10 @@ void initVariant(void)
 {
   USBD_Attach(STM32L4_USB_IRQ_PRIORITY);
 
+#if defined(ARDUINO_STM32L4_DOSFS_SDCARD)
+  f_initvolume(&dosfs_sdcard_init, 0);
+#else /* ARDUINO_STM32L4_DOSFS_SDCARD */
   f_initvolume(&dosfs_sflash_init, 0);
+#endif /* ARDUINO_STM32L4_DOSFS_SDCARD */
   f_checkvolume();
 }