Bringing Massdrop keyboard hardware configuration to keyboard level (#4593)

MCU Pins for debugging, LED, boot tracing, and shift registers are now configurable at keyboard level.
Macros led_* replaced by DBG_LED_*
Macros m15_* replaced by DBG_1_*
Macros m27_* replaced by DBG_2_*
Macros m28_* replaced by DBG_3_*
For CTRL and ALT keyboards, debug boot tracing pin default now set to pad M27 instead of M28 since although M28 is not being used, it is technically a signal for USB port detection.
m15_print(...) renamed to dbg_print(...) to get away from hard coded port names.
dbg_print function now follows similar pattern to debug led output.

2 files changed, 52 insertions, 5 deletions

diff --git a/keyboards/massdrop/ctrl/config.h b/keyboards/massdrop/ctrl/config.h
index 1ab7f93cd..31eccda87 100644
--- a/keyboards/massdrop/ctrl/config.h
+++ b/keyboards/massdrop/ctrl/config.h
@@ -32,17 +32,64 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROWS 11
 #define MATRIX_COLS 8
 
+/* MCU Port name definitions */
 #define PA 0
 #define PB 1
 
+/* Port and Pin definition of key row hardware configuration */
 #define MATRIX_ROW_PORTS PB, PB, PB, PB, PB, PB, PA, PA, PB, PB, PB
 #define MATRIX_ROW_PINS   4,  5,  6,  7,  8,  9, 10, 11, 10, 11, 12
 
+/* Port and Pin definition of key column hardware configuration */
 #define MATRIX_COL_PORTS PA, PA, PA, PA, PA, PA, PA, PA
 #define MATRIX_COL_PINS   0,  1,  2,  3,  4,  5,  6,  7
 
-/* Print boot debug codes using debug LED when M28 and M30 shorted */
-#define DEBUG_BOOT_TRACING
+/* This Shift Register expands available hardware output lines to control additional peripherals */
+/* It uses four lines from the MCU to provide 16 output lines */
+/* Shift Register Clock configuration (MCU to ShiftRegister.RCLK) */
+#define SR_EXP_RCLK_PORT            PB
+#define SR_EXP_RCLK_PIN             14
+/* Shift Register Output Enable configuration (MCU to ShiftRegister.OE_N) */
+#define SR_EXP_OE_N_PORT            PB
+#define SR_EXP_OE_N_PIN             15
+/* SERCOM port to use for Shift Register SPI */
+/* DATAOUT and SCLK must be configured to use hardware pins of this port */
+#define SR_EXP_SERCOM               SERCOM2
+/* Shift Register SPI Data Out configuration (MCU.SERCOMx.PAD[0] to ShiftRegister.SER) */
+#define SR_EXP_DATAOUT_PORT         PA
+#define SR_EXP_DATAOUT_PIN          12
+#define SR_EXP_DATAOUT_MUX          2
+/* Shift Register SPI Serial Clock configuration (MCU.SERCOMx.PAD[1] to ShiftRegister.SRCLK) */
+#define SR_EXP_SCLK_PORT            PA
+#define SR_EXP_SCLK_PIN             13
+#define SR_EXP_SCLK_MUX             2
+
+/* Debug LED (Small LED Located near MCU) */
+#define DEBUG_LED_ENABLE            1
+#define DEBUG_LED_PORT              PA
+#define DEBUG_LED_PIN               27
+
+/* Additional debugging ports */
+/* PCB M21 */
+#define DEBUG_PORT1_ENABLE          1
+#define DEBUG_PORT1_PORT            PB
+#define DEBUG_PORT1_PIN             3
+/* PCB M23 */
+#define DEBUG_PORT2_ENABLE          1
+#define DEBUG_PORT2_PORT            PB
+#define DEBUG_PORT2_PIN             17
+/* PCB M25 */
+#define DEBUG_PORT3_ENABLE          1
+#define DEBUG_PORT3_PORT            PA
+#define DEBUG_PORT3_PIN             20
+
+/* Debug Boot Tracing - During boot sequence, ground this pin to halt and display debug code using Debug LED */
+/* This is useful in determining which hardware device may have malfunctioned or is improperly configured */
+/* Feature is automatically disabled after successful boot */
+/* PCB M27 */
+#define DEBUG_BOOT_TRACING_ENABLE   1
+#define DEBUG_BOOT_TRACING_PORT     PB
+#define DEBUG_BOOT_TRACING_PIN      23
 
 /* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
 #define DEBOUNCING_DELAY 5
diff --git a/keyboards/massdrop/ctrl/matrix.c b/keyboards/massdrop/ctrl/matrix.c
index 6f306962e..3580577dc 100644
--- a/keyboards/massdrop/ctrl/matrix.c
+++ b/keyboards/massdrop/ctrl/matrix.c
@@ -75,7 +75,7 @@ void matrix_init(void)
         PORT->Group[col_ports[col]].DIRSET.reg = 1 << col_pins[col]; //Output
         PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; //Low
     }
-    
+
     matrix_init_quantum();
 }
 
@@ -91,7 +91,7 @@ uint8_t matrix_scan(void)
 
     if (CLK_get_ms() < mdebouncing) return 1; //mdebouncing == 0 when no debouncing active
 
-    //m15_off; //Profiling scans
+    //DBG_1_OFF; //Profiling scans
 
     memset(mlatest, 0, MATRIX_ROWS * sizeof(matrix_row_t)); //Zero the result buffer
 
@@ -135,7 +135,7 @@ uint8_t matrix_scan(void)
         mdebouncing = CLK_get_ms() + DEBOUNCING_DELAY;
     }
 
-    //m15_on; //Profiling scans
+    //DBG_1_ON; //Profiling scans
 
     matrix_scan_quantum();