From 882567cd08e15d73aee0802fd1b1c31076801a02 Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Sat, 29 Apr 2023 02:50:03 -0600
Subject: converted KR4-nofet build

---
 hwdef-noctigon-kr4-nofet.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 hwdef-noctigon-kr4-nofet.c

(limited to 'hwdef-noctigon-kr4-nofet.c')

diff --git a/hwdef-noctigon-kr4-nofet.c b/hwdef-noctigon-kr4-nofet.c
new file mode 100644
index 0000000..ec984df
--- /dev/null
+++ b/hwdef-noctigon-kr4-nofet.c
@@ -0,0 +1,47 @@
+// Noctigon KR4 (no DD FET) PWM helper functions
+// Copyright (C) 2020-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "chan-rgbaux.c"
+
+// single set of LEDs with linear power channel
+void set_level_main(uint8_t level) {
+    if (level == 0) {
+        CH1_PWM = 0;
+        CH2_PWM = 0;
+        PWM_CNT = 0;  // reset phase
+        CH1_ENABLE_PORT &= ~(1 << CH1_ENABLE_PIN);  // disable opamp
+        return;
+    }
+
+    CH1_ENABLE_PORT |= (1 << CH1_ENABLE_PIN);  // enable opamp
+
+    level --;  // PWM array index = level - 1
+    PWM_DATATYPE ch1_pwm = PWM_GET(pwm1_levels, level);
+    // pulse frequency modulation, a.k.a. dynamic PWM
+    uint16_t top = PWM_GET16(pwm_tops, level);
+
+    CH1_PWM = ch1_pwm;
+    CH2_PWM = 0;
+    // 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);
+
+    GRADUAL_ADJUST_SIMPLE(pwm1, CH1_PWM);
+
+    if (   (pwm1 == CH1_PWM)
+       ) {
+        return true;  // done
+    }
+    return false;  // not done yet
+}
+
-- 
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