converted FW3A to new API

(my FW3A dev host is dead though, so the DD FET channel
 isn't 100% confirmed to work ... will have to solder together
 a new dev host at some point)

3 files changed, 176 insertions, 51 deletions

diff --git a/hwdef-FW3A.h b/hwdef-FW3A.h
deleted file mode 100644
index f2b5c8d..0000000
--- a/hwdef-FW3A.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// BLF/TLF FW3A driver layout
-// Copyright (C) 2018-2023 Selene ToyKeeper
-// SPDX-License-Identifier: GPL-3.0-or-later
-#pragma once
-
-/*
- *           ----
- *   Reset -|1  8|- VCC
- * eswitch -|2  7|- optic nerve
- *     FET -|3  6|- 7x7135
- *     GND -|4  5|- 1x7135
- *           ----
- */
-
-#define PWM_CHANNELS 3
-
-#ifndef SWITCH_PIN
-#define SWITCH_PIN   PB3    // pin 2
-#define SWITCH_PCINT PCINT3 // pin 2 pin change interrupt
-#endif
-
-#ifndef PWM1_PIN
-#define PWM1_PIN PB0        // pin 5, 1x7135 PWM
-#define PWM1_LVL OCR0A      // OCR0A is the output compare register for PB0
-#endif
-#ifndef PWM2_PIN
-#define PWM2_PIN PB1        // pin 6, 7x7135 PWM
-#define PWM2_LVL OCR0B      // OCR0B is the output compare register for PB1
-#endif
-#ifndef PWM3_PIN
-#define PWM3_PIN PB4        // pin 3, FET PWM
-#define PWM3_LVL OCR1B      // OCR1B is the output compare register for PB4
-#endif
-
-#ifndef VISION_PIN
-#define VISION_PIN PB2      // pin 7, optic nerve
-//#define ADC_CHANNEL 0x01    // MUX 01 corresponds with PB2
-//#define ADC_DIDR    ADC1D   // Digital input disable bit corresponding with PB2
-#endif
-#define ADC_PRSCL   0x07    // clk/128
-
-// average drop across diode on this hardware
-#ifndef VOLTAGE_FUDGE_FACTOR
-#define VOLTAGE_FUDGE_FACTOR 5  // add 0.25V
-#endif
-
-#define FAST 0xA3           // fast PWM both channels
-#define PHASE 0xA1          // phase-correct PWM both channels
-
-#define LAYOUT_DEFINED
-
diff --git a/hwdef-fw3a.c b/hwdef-fw3a.c
new file mode 100644
index 0000000..b20969d
--- /dev/null
+++ b/hwdef-fw3a.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
+}
+
diff --git a/hwdef-fw3a.h b/hwdef-fw3a.h
new file mode 100644
index 0000000..519fb97
--- /dev/null
+++ b/hwdef-fw3a.h
@@ -0,0 +1,105 @@
+// BLF/TLF FW3A driver layout
+// Copyright (C) 2018-2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+/*
+ *           ----
+ *   Reset -|1  8|- VCC
+ * eswitch -|2  7|- optic nerve
+ *     FET -|3  6|- 7x7135
+ *     GND -|4  5|- 1x7135
+ *           ----
+ */
+
+#define ATTINY 85
+#include <avr/io.h>
+
+#define HWDEF_C_FILE hwdef-fw3a.c
+
+// channel modes
+// * 0. FET+7+1 stacked
+#define NUM_CHANNEL_MODES   1
+enum CHANNEL_MODES {
+    CM_MAIN = 0,
+};
+
+#define DEFAULT_CHANNEL_MODE  CM_MAIN
+
+// right-most bit first, modes are in fedcba9876543210 order
+#define CHANNEL_MODES_ENABLED 0b00000001
+
+
+#define PWM_CHANNELS 3  // old, remove this
+
+#define PWM_BITS      8       // attiny85 only supports up to 8 bits
+#define PWM_GET       PWM_GET8
+#define PWM_DATATYPE  uint8_t
+#define PWM_DATATYPE2 uint16_t
+#define PWM1_DATATYPE uint8_t   // 1x7135 ramp
+#define PWM2_DATATYPE uint8_t   // 7x7135 ramp
+#define PWM3_DATATYPE uint8_t   // DD FET ramp
+
+#define PWM_TOP_INIT  255    // highest value used in top half of ramp
+
+// 1x7135 channel
+#define CH1_PIN  PB0        // pin 5, 1x7135 PWM
+#define CH1_PWM  OCR0A      // OCR0A is the output compare register for PB0
+
+// 7x7135 channel
+#define CH2_PIN  PB1        // pin 6, 7x7135 PWM
+#define CH2_PWM  OCR0B      // OCR0B is the output compare register for PB1
+
+// DD FET channel
+#define CH3_PIN  PB4        // pin 3, FET PWM
+#define CH3_PWM  OCR1B      // OCR1B is the output compare register for PB4
+
+// e-switch
+#ifndef SWITCH_PIN
+#define SWITCH_PIN   PB3    // pin 2
+#define SWITCH_PCINT PCINT3 // pin 2 pin change interrupt
+#endif
+
+#ifndef VISION_PIN
+#define VISION_PIN PB2      // pin 7, optic nerve
+//#define ADC_CHANNEL 0x01    // MUX 01 corresponds with PB2
+//#define ADC_DIDR    ADC1D   // Digital input disable bit corresponding with PB2
+#endif
+#define ADC_PRSCL   0x07    // clk/128
+
+// average drop across diode on this hardware
+#ifndef VOLTAGE_FUDGE_FACTOR
+#define VOLTAGE_FUDGE_FACTOR 5  // add 0.25V
+#endif
+
+#define FAST 0xA3           // fast PWM both channels
+#define PHASE 0xA1          // phase-correct PWM both channels
+
+
+inline void hwdef_setup() {
+
+    // configure PWM channels
+    DDRB = (1 << CH1_PIN)
+         | (1 << CH2_PIN)
+         | (1 << CH3_PIN);
+
+    // configure PWM channels
+    TCCR0B = 0x01; // pre-scaler for timer (1 => 1, 2 => 8, 3 => 64...)
+    TCCR0A = PHASE;
+
+    // Second PWM counter is ... weird
+    TCCR1 = _BV (CS10);
+    GTCCR = _BV (COM1B1) | _BV (PWM1B);
+    OCR1C = PWM_TOP_INIT;  // Set ceiling value to maximum
+
+    // configure e-switch
+    PORTB = (1 << SWITCH_PIN);  // e-switch is the only input
+    PCMSK = (1 << SWITCH_PIN);  // pin change interrupt uses this pin
+
+    // TODO: set up the vision pin
+
+}
+
+
+#define LAYOUT_DEFINED
+