Update variant.h so override pins_arduino files

Author: MCUdude

variants/Generic_F401Rx/variant.h

@@ -86,7 +86,6 @@ extern "C" {
 #define NUM_DIGITAL_PINS        50
 #define NUM_ANALOG_INPUTS       16
 #define NUM_ANALOG_FIRST        0
-#define MAX_ANALOG_INPUTS       15
 #define AEND                    36
 
 // On-board LED pin number
@@ -96,6 +95,40 @@ extern "C" {
 // On-board user button
 #define USER_BTN                PC13
 
+// Analog pin definitions
+#define PIN_A0       PA0
+#define PIN_A1       PA1
+#define PIN_A2       PA2
+#define PIN_A3       PA3
+#define PIN_A4       PA4
+#define PIN_A5       PA5
+#define PIN_A6       PA6
+#define PIN_A7       PA7
+#define PIN_A8       PB0
+#define PIN_A9       PB1
+#define PIN_A10      PC0
+#define PIN_A11      PC1
+#define PIN_A12      PC2
+#define PIN_A13      PC3
+#define PIN_A14      PC4
+#define PIN_A15      PC5
+
+// Convert analog channel, analog pin or digital pin to digital pin
+#define analogInputToDigitalPin(p)  ((p <= 7)  ? (p) : (p <= 9)  ? (p + 8) : (p <= 15) ? (p + 21) : (p)) 
+
+// SPI definitions
+#define PIN_SPI_SS                  PA4
+#define PIN_SPI_SS1                 PA4
+#define PIN_SPI_SS2                 PB12
+#define PIN_SPI_SS3                 PA15
+#define PIN_SPI_MOSI                PA7
+#define PIN_SPI_MISO                PA6
+#define PIN_SPI_SCK                 PA5
+
+// I2C definitions
+#define PIN_WIRE_SDA                PB9
+#define PIN_WIRE_SCL                PB8
+
 // Timer Definitions
 #define TIMER_TONE              TIM10
 #define TIMER_SERVO             TIM11