/*****************************************************************************/
/*                                    Pins                                   */
/*****************************************************************************/

// columns
constexpr int KD1 = 0;
constexpr int KD2 = 1;
constexpr int KD3 = 2;
constexpr int KD4 = 3;
constexpr int KD5 = 4;
constexpr int KD6 = 5;
constexpr int KD7 = 6;
constexpr int KD8 = 7;

// row selectors
constexpr int SA1 = 8;
constexpr int SA2 = 9;
constexpr int SA3 = 14;

constexpr int SEL_A = SA1;
constexpr int SEL_B = SA2;
constexpr int SEL_C = SA3;

// range selector
constexpr int SA4 = 15;
constexpr int SA5 = 16;

constexpr int RS1 = SA4;
constexpr int RS2 = SA5;

// sustain
constexpr int SSTE = 21;