From 9d9cdaaa2d035787b0b50c26f2975695fdbc16f4 Mon Sep 17 00:00:00 2001
From: Nick Brassel <nick@tzarc.org>
Date: Sun, 18 Feb 2024 21:17:15 +1100
Subject: Add encoder abstraction. (#21548)

---
 keyboards/planck/rev7/matrix.c | 86 ++++++------------------------------------
 1 file changed, 11 insertions(+), 75 deletions(-)

(limited to 'keyboards/planck/rev7/matrix.c')

diff --git a/keyboards/planck/rev7/matrix.c b/keyboards/planck/rev7/matrix.c
index c89c399a40..350ce93ce0 100644
--- a/keyboards/planck/rev7/matrix.c
+++ b/keyboards/planck/rev7/matrix.c
@@ -32,31 +32,16 @@
 #define STM32_IWDG_RL_MS(s) STM32_IWDG_RL_US(s * 1000.0)
 #define STM32_IWDG_RL_S(s) STM32_IWDG_RL_US(s * 1000000.0)
 
-#if !defined(PLANCK_ENCODER_RESOLUTION)
-#    define PLANCK_ENCODER_RESOLUTION 4
-#endif
-
 #if !defined(PLANCK_WATCHDOG_TIMEOUT)
 #   define PLANCK_WATCHDOG_TIMEOUT 1.0
 #endif
 
-#ifdef ENCODER_MAP_ENABLE
-#error "The encoder map feature is not currently supported by the Planck's encoder matrix"
-#endif
-
 /* matrix state(1:on, 0:off) */
 static pin_t matrix_row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
 static pin_t matrix_col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 
 static matrix_row_t matrix_inverted[MATRIX_COLS];
 
-#ifdef ENCODER_ENABLE
-int8_t  encoder_LUT[]     = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
-uint8_t encoder_state[8]  = {0};
-int8_t  encoder_pulses[8] = {0};
-uint8_t encoder_value[8]  = {0};
-#endif
-
 void matrix_init_custom(void) {
     // actual matrix setup - cols
     for (int i = 0; i < MATRIX_COLS; i++) {
@@ -84,31 +69,6 @@ void matrix_init_custom(void) {
 #endif
 }
 
-#ifdef ENCODER_ENABLE
-bool encoder_update(uint8_t index, uint8_t state) {
-    bool    changed = false;
-    uint8_t i       = index;
-
-    encoder_pulses[i] += encoder_LUT[state & 0xF];
-
-    if (encoder_pulses[i] >= PLANCK_ENCODER_RESOLUTION) {
-        encoder_value[index]++;
-        changed = true;
-        encoder_update_kb(index, false);
-    }
-    if (encoder_pulses[i] <= -PLANCK_ENCODER_RESOLUTION) {
-        encoder_value[index]--;
-        changed = true;
-        encoder_update_kb(index, true);
-    }
-    encoder_pulses[i] %= PLANCK_ENCODER_RESOLUTION;
-#ifdef ENCODER_DEFAULT_POS
-    encoder_pulses[i] = 0;
-#endif
-    return changed;
-}
-#endif
-
 bool matrix_scan_custom(matrix_row_t current_matrix[]) {
 #ifndef PLANCK_WATCHDOG_DISABLE
     // reset watchdog
@@ -149,40 +109,16 @@ bool matrix_scan_custom(matrix_row_t current_matrix[]) {
         changed |= old != current_matrix[row];
     }
 
-#ifdef ENCODER_ENABLE
-    // encoder-matrix functionality
-
-    // set up C/rows for encoder read
-    for (int i = 0; i < MATRIX_ROWS; i++) {
-        setPinOutput(matrix_row_pins[i]);
-        writePinHigh(matrix_row_pins[i]);
-    }
-
-    // set up A & B for reading
-    setPinInputHigh(B12);
-    setPinInputHigh(B13);
-
-    for (int i = 0; i < MATRIX_ROWS; i++) {
-        writePinLow(matrix_row_pins[i]);
-        wait_us(10);
-        uint8_t new_status = (palReadPad(GPIOB, 12) << 0) | (palReadPad(GPIOB, 13) << 1);
-        if ((encoder_state[i] & 0x3) != new_status) {
-            encoder_state[i] <<= 2;
-            encoder_state[i] |= new_status;
-            encoder_update(i, encoder_state[i]);
-        }
-        writePinHigh(matrix_row_pins[i]);
-    }
-
-    // revert A & B to matrix state
-    setPinInputLow(B12);
-    setPinInputLow(B13);
-
-    // revert C/rows to matrix state
-    for (int i = 0; i < MATRIX_ROWS; i++) {
-        setPinInputLow(matrix_row_pins[i]);
-    }
-#endif
-
     return changed;
 }
+
+uint8_t encoder_quadrature_read_pin(uint8_t index, bool pad_b) {
+    pin_t pin = pad_b ? B13: B12;
+    setPinInputHigh(pin);
+    writePinLow(matrix_row_pins[index]);
+    wait_us(10);
+    uint8_t ret = readPin(pin) ? 1 : 0;
+    setPinInputLow(matrix_row_pins[index]);
+    setPinInputLow(pin);
+    return ret;
+}
-- 
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