1 files changed, 71 insertions, 0 deletions
diff --git a/hw/lumintop/fw3a/hwdef.c b/hw/lumintop/fw3a/hwdef.c
new file mode 100644
index 0000000..b20969d
--- /dev/null
+++ b/hw/lumintop/fw3a/hwdef.c
@@ -0,0 +1,71 @@
+// BLF/TLF FW3A PWM helper functions
+// Copyright (C) 2019-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+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
+    },
+};
+
+
+void set_level_zero() {
+    CH1_PWM = 0;
+    CH2_PWM = 0;
+    #ifdef CH3_PIN
+        CH3_PWM = 0;
+    #endif
+}
+
+// TODO: implement delta-sigma modulation for better low modes
+
+// single set of LEDs with 3 stacked power channels, FET+N+1
+// (or just use N+1 on the no-FET model or FET+1 model)
+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);
+    #ifdef CH3_PIN
+        PWM_DATATYPE ch3_pwm = PWM_GET(pwm3_levels, level);
+    #endif
+
+    CH1_PWM = ch1_pwm;
+    CH2_PWM = ch2_pwm;
+    #ifdef CH3_PIN
+        CH3_PWM = ch3_pwm;
+    #endif
+}
+
+bool gradual_tick_main(uint8_t gt) {
+    PWM_DATATYPE pwm1 = PWM_GET(pwm1_levels, gt);
+    PWM_DATATYPE pwm2 = PWM_GET(pwm2_levels, gt);
+    #ifdef CH3_PIN
+        PWM_DATATYPE pwm3 = PWM_GET(pwm3_levels, gt);
+    #endif
+
+    GRADUAL_ADJUST_STACKED(pwm1, CH1_PWM, PWM_TOP_INIT);
+    #ifdef CH3_PIN
+        GRADUAL_ADJUST_STACKED(pwm2, CH2_PWM, PWM_TOP_INIT);
+        GRADUAL_ADJUST_SIMPLE (pwm3, CH3_PWM);
+    #else
+        GRADUAL_ADJUST_SIMPLE (pwm2, CH2_PWM);
+    #endif
+
+    if (   (pwm1 == CH1_PWM)
+        && (pwm2 == CH2_PWM)
+        #ifdef CH3_PIN
+            && (pwm3 == CH3_PWM)
+        #endif
+       ) {
+        return true;  // done
+    }
+    return false;  // not done yet
+}
+