Refactor Drop boards to custom matrix lite (#13468)

2 files changed, 37 insertions, 143 deletions

diff --git a/keyboards/massdrop/alt/matrix.c b/keyboards/massdrop/alt/matrix.c
index f635f37f23..181f223e40 100644
--- a/keyboards/massdrop/alt/matrix.c
+++ b/keyboards/massdrop/alt/matrix.c
@@ -16,167 +16,61 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "alt.h"
-
 #include "d51_util.h"
-#include "debug.h"
-#include "clks.h"
-#include <string.h>
-
-#ifndef MATRIX_IO_DELAY
-#    define MATRIX_IO_DELAY 1
-#endif
-
-matrix_row_t mlatest[MATRIX_ROWS];
-matrix_row_t mlast[MATRIX_ROWS];
-matrix_row_t mdebounced[MATRIX_ROWS];
-
-uint8_t row_ports[] = { MATRIX_ROW_PORTS };
-uint8_t row_pins[] = { MATRIX_ROW_PINS };
-uint8_t col_ports[] = { MATRIX_COL_PORTS };
-uint8_t col_pins[] = { MATRIX_COL_PINS };
-uint32_t row_masks[2]; //NOTE: If more than PA PB used in the future, adjust code to accomodate
 
-__attribute__((weak)) void matrix_io_delay(void) { wait_us(MATRIX_IO_DELAY); }
-
-__attribute__ ((weak))
-void matrix_init_kb(void) {
-    matrix_init_user();
-}
-
-__attribute__ ((weak))
-void matrix_scan_kb(void) {
-    matrix_scan_user();
-}
-
-__attribute__ ((weak))
-void matrix_init_user(void) {
-}
-
-__attribute__ ((weak))
-void matrix_scan_user(void) {
-}
-
-void matrix_init(void)
-{
-    memset(mlatest, 0, MATRIX_ROWS * sizeof(matrix_row_t));
-    memset(mlast, 0, MATRIX_ROWS * sizeof(matrix_row_t));
-    memset(mdebounced, 0, MATRIX_ROWS * sizeof(matrix_row_t));
+const uint8_t row_ports[] = {MATRIX_ROW_PORTS};
+const uint8_t row_pins[]  = {MATRIX_ROW_PINS};
+const uint8_t col_ports[] = {MATRIX_COL_PORTS};
+const uint8_t col_pins[]  = {MATRIX_COL_PINS};
+uint32_t      row_masks[2];  // NOTE: If more than PA PB used in the future, adjust code to accommodate
 
+void matrix_init_custom(void) {
     row_masks[PA] = 0;
     row_masks[PB] = 0;
 
-    uint8_t row;
-    for (row = 0; row < MATRIX_ROWS; row++)
-    {
-        PORT->Group[row_ports[row]].DIRCLR.reg = 1 << row_pins[row]; //Input
-        PORT->Group[row_ports[row]].OUTCLR.reg = 1 << row_pins[row]; //Low
-        PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.INEN = 1; //Input Enable,
-        PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.PULLEN = 1; //Pull Enable
-        row_masks[row_ports[row]] |= 1 << row_pins[row]; //Add pin to proper row mask
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        PORT->Group[row_ports[row]].DIRCLR.reg                       = 1 << row_pins[row];  // Input
+        PORT->Group[row_ports[row]].OUTCLR.reg                       = 1 << row_pins[row];  // Low
+        PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.INEN   = 1;                   // Input Enable,
+        PORT->Group[row_ports[row]].PINCFG[row_pins[row]].bit.PULLEN = 1;                   // Pull Enable
+        row_masks[row_ports[row]] |= 1 << row_pins[row];                                    // Add pin to proper row mask
     }
 
-    uint8_t col;
-    for (col = 0; col < MATRIX_COLS; col++)
-    {
-        PORT->Group[col_ports[col]].DIRSET.reg = 1 << col_pins[col]; //Output
-        PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; //Low
+    for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+        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();
 }
 
-uint64_t mdebouncing = 0;
-uint8_t matrix_scan(void)
-{
-    uint8_t mchanged;
-    uint8_t row;
-    uint8_t col;
-    uint32_t scans[2]; //PA PB
-
-    if (timer_read64() < mdebouncing) return 1; //mdebouncing == 0 when no debouncing active
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+    matrix_row_t raw[MATRIX_ROWS] = {0};
+    uint32_t     scans[2];  // PA PB
 
-    memset(mlatest, 0, MATRIX_ROWS * sizeof(matrix_row_t)); //Zero the result buffer
+    for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+        PORT->Group[col_ports[col]].OUTSET.reg = 1 << col_pins[col];  // Set col output
 
-    for (col = 0; col < MATRIX_COLS; col++)
-    {
-        PORT->Group[col_ports[col]].OUTSET.reg = 1 << col_pins[col]; //Set col output
+        matrix_io_delay();  // Delay for output
 
-        matrix_io_delay(); //Delay for output
+        scans[PA] = PORT->Group[PA].IN.reg & row_masks[PA];  // Read PA row pins data
+        scans[PB] = PORT->Group[PB].IN.reg & row_masks[PB];  // Read PB row pins data
 
-        scans[PA] = PORT->Group[PA].IN.reg & row_masks[PA]; //Read PA row pins data
-        scans[PB] = PORT->Group[PB].IN.reg & row_masks[PB]; //Read PB row pins data
+        PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col];  // Clear col output
 
-        PORT->Group[col_ports[col]].OUTCLR.reg = 1 << col_pins[col]; //Clear col output
-
-        for (row = 0; row < MATRIX_ROWS; row++)
-        {
-            //Move scan bits from scans array into proper row bit locations
-            if (scans[row_ports[row]] & (1 << row_pins[row]))
-                mlatest[row] |= 1 << col;
+        for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+            // Move scan bits from scans array into proper row bit locations
+            if (scans[row_ports[row]] & (1 << row_pins[row])) {
+                raw[row] |= 1 << col;
+            }
         }
     }
 
-    mchanged = 0; //Default to no matrix change since last
-
-    for (row = 0; row < MATRIX_ROWS; row++)
-    {
-        if (mlast[row] != mlatest[row])
-            mchanged = 1;
-        mlast[row] = mlatest[row];
-    }
-
-    if (!mchanged)
-    {
-        for (row = 0; row < MATRIX_ROWS; row++)
-            mdebounced[row] = mlatest[row];
-        mdebouncing = 0;
-    }
-    else
-    {
-        //Begin or extend debounce on change
-        mdebouncing = timer_read64() + DEBOUNCE;
-    }
-
-    matrix_scan_quantum();
-
-    return 1;
-}
-
-matrix_row_t matrix_get_row(uint8_t row)
-{
-    return mdebounced[row];
-}
-
-void matrix_print(void)
-{
-    char buf[(MATRIX_COLS+8)*(MATRIX_ROWS+1)] = "R C";
-    char *pbuf = buf+3;
-    uint32_t cols;
-    uint32_t rows;
-    matrix_row_t row;
-
-    for (cols = 1; cols <= MATRIX_COLS; cols++)
-    {
-        *pbuf = (cols%10)+48;
-        pbuf++;
-    }
-    *pbuf = '\r'; pbuf++;
-    *pbuf = '\n'; pbuf++;
-
-    for (rows = 1; rows <= MATRIX_ROWS; rows++)
-    {
-        row = matrix_get_row(rows-1);
-        if (rows < 10) { *pbuf = rows+48; pbuf++; *pbuf = ' '; pbuf++; *pbuf = ' '; pbuf++; }
-        else { *pbuf = (rows/10)+48; pbuf++; *pbuf = (rows%10)+48; pbuf++; *pbuf = ' '; pbuf++; }
-        for (cols = 0; cols < MATRIX_COLS; cols++)
-        {
-            if (row & 1 << cols) *pbuf = 'X';
-            else                 *pbuf = '.';
-            pbuf++;
+    bool changed = false;
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        if (current_matrix[row] != raw[row]) {
+            current_matrix[row] = raw[row];
+            changed             = true;
         }
-        *pbuf = '\r'; pbuf++;
-        *pbuf = '\n'; pbuf++;
     }
-    *pbuf = 0;
-    dprint(buf);
+
+    return changed;
 }
diff --git a/keyboards/massdrop/alt/rules.mk b/keyboards/massdrop/alt/rules.mk
index 538df480bd..86403d830d 100644
--- a/keyboards/massdrop/alt/rules.mk
+++ b/keyboards/massdrop/alt/rules.mk
@@ -6,7 +6,7 @@ SRC += config_led.c
 ARM_ATSAM = SAMD51J18A
 MCU = cortex-m4
 
-CUSTOM_MATRIX = yes
+CUSTOM_MATRIX = lite
 
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 #   comment out to disable the options.