Add picocalc stm32 i2c keyboard code

Code/picocalc_keyboard/pins.h

@@ -0,0 +1,21 @@
+#ifndef PINS_H
+#define PINS_H
+
+#include "keyboard.h"
+
+const uint8_t row_pins[NUM_OF_ROWS] =
+{
+  PA0,PA1,PA2,PA3,PA4,PA5,PA6
+};
+
+const uint8_t col_pins[NUM_OF_COLS] =
+{
+  PC0,PC1,PC2,PC3,PC4,PC5,PC6,PC7
+};
+
+const uint8_t btn_pins[NUM_OF_BTNS] =
+{
+  PB0,PB1,PB2,PB3,PB4,PB5,PB6,PB7,PB12,PB13,PB14,PB15
+};
+
+#endif