1 files changed, 67 insertions, 0 deletions
diff --git a/hw/hank/emisar-d4sv2/hwdef.c b/hw/hank/emisar-d4sv2/hwdef.c
new file mode 100644
index 0000000..6399fb8
--- /dev/null
+++ b/hw/hank/emisar-d4sv2/hwdef.c
@@ -0,0 +1,67 @@
+// Emisar D4Sv2 PWM helper functions
+// Copyright (C) 2019-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "chan-rgbaux.c"
+
+void set_level_zero();
+
+void set_level_main(uint8_t level);
+bool gradual_tick_main(uint8_t gt);
+
+
+Channel channels[] = {
+    { // main LEDs
+        .set_level    = set_level_main,
+        .gradual_tick = gradual_tick_main
+    },
+    RGB_AUX_CHANNELS
+};
+
+
+void set_level_zero() {
+    CH1_PWM = 0;
+    CH2_PWM = 0;
+    CH3_PWM = 0;
+    PWM_CNT = 0;  // reset phase
+}
+
+// single set of LEDs with 3 stacked power channels, DDFET+3+1
+void set_level_main(uint8_t level) {
+    PWM_DATATYPE ch1_pwm = PWM_GET(pwm1_levels, level);
+    PWM_DATATYPE ch2_pwm = PWM_GET(pwm2_levels, level);
+    PWM_DATATYPE ch3_pwm = PWM_GET(pwm3_levels, level);
+    // pulse frequency modulation, a.k.a. dynamic PWM
+    uint16_t top = PWM_GET16(pwm_tops, level);
+
+    CH1_PWM = ch1_pwm;
+    CH2_PWM = ch2_pwm;
+    CH3_PWM = ch3_pwm;
+    // wait to sync the counter and avoid flashes
+    while(actual_level && (PWM_CNT > (top - 32))) {}
+    PWM_TOP = top;
+    // force reset phase when turning on from zero
+    // (because otherwise the initial response is inconsistent)
+    if (! actual_level) PWM_CNT = 0;
+}
+
+bool gradual_tick_main(uint8_t gt) {
+    PWM_DATATYPE pwm1 = PWM_GET(pwm1_levels, gt);
+    PWM_DATATYPE pwm2 = PWM_GET(pwm2_levels, gt);
+    PWM_DATATYPE pwm3 = PWM_GET(pwm3_levels, gt);
+
+    GRADUAL_ADJUST_STACKED(pwm1, CH1_PWM, PWM_TOP_INIT);
+    GRADUAL_ADJUST_STACKED(pwm2, CH2_PWM, PWM_TOP_INIT);
+    GRADUAL_ADJUST_SIMPLE (pwm3, CH3_PWM);
+
+    if (   (pwm1 == CH1_PWM)
+        && (pwm2 == CH2_PWM)
+        && (pwm3 == CH3_PWM)
+       ) {
+        return true;  // done
+    }
+    return false;  // not done yet
+}
+