Merge branch 'emisar-d3aa' into trunk

Added support for new Emisar D3AA torch.

* emisar-d3aa:
  d3aa: fixed voltage calculation to use 0.02V units instead of 0.025V
  d3aa weak battery test: blink 3x instead of 2x, and omit number readout
  weak battery detection: use different thresholds for AA and Li-Ion (also, fixed bug where a totally empty li-ion didn't get limited)
  d3aa: got weak battery detection actually working, and not letting the magic smoke out of updi adapters any more (probably)
  dammit, got alkaline detection half working and then my flashing adapter died (saving progress here so I can work on a different branch)
  d3aa fine-tuning: - new ramp - production style config defaults (simple mode, Hank config) - candle tuning - fixed way-too-fast thermal regulation   (might still be a bit fast, but it's a lot better)
  d3aa: fixed voltage measurement
  d3aa: made it easy to switch between vddio2 and external voltage divider
  emisar-d3aa: new model number, since this is a new product line
  added initial code for emisar-d3aa torch

1 files changed, 202 insertions, 0 deletions

diff --git a/hw/hank/emisar-d3aa/hwdef.c b/hw/hank/emisar-d3aa/hwdef.c
new file mode 100644
index 0000000..be673e1
--- /dev/null
+++ b/hw/hank/emisar-d3aa/hwdef.c
@@ -0,0 +1,202 @@
+// Emisar D3AA helper functions
+// Copyright (C) 2023 Selene ToyKeeper
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+#include "fsm/chan-rgbaux.c"
+#include "fsm/ramping.h"
+#include "ui/anduril/misc.h"
+
+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() {
+    DAC_LVL  = 0;  // DAC off
+    DAC_VREF = V10;  // low Vref
+    HDR_ENABLE_PORT &= ~(1 << HDR_ENABLE_PIN);  // HDR off
+
+    // prevent post-off flash
+    IN_NFET_ENABLE_PORT |= (1 << IN_NFET_ENABLE_PIN);
+    delay_4ms(IN_NFET_DELAY_TIME/4);
+    IN_NFET_ENABLE_PORT &= ~(1 << IN_NFET_ENABLE_PIN);
+
+    // turn off boost last
+    BST_ENABLE_PORT &= ~(1 << BST_ENABLE_PIN);  // BST off
+}
+
+// single set of LEDs with 1 regulated power channel
+// and low/high HDR plus low/high Vref as different "gears"
+void set_level_main(uint8_t level) {
+    uint8_t noflash = 0;
+
+    // when turning on from off, use IN_NFET to prevent a flash
+    if ((! actual_level) && (level < HDR_ENABLE_LEVEL_MIN)) {
+        noflash = 1;
+        IN_NFET_ENABLE_PORT |= (1 << IN_NFET_ENABLE_PIN);
+    }
+
+    // BST on first, to give it a few extra microseconds to spin up
+    BST_ENABLE_PORT |= (1 << BST_ENABLE_PIN);
+
+    // pre-load ramp data so it can be assigned faster later
+    // DAC level register is left-aligned
+    PWM1_DATATYPE dac_lvl  = PWM1_GET(level) << 6;
+    PWM2_DATATYPE dac_vref = PWM2_GET(level);
+
+    // enable HDR on top half of ramp
+    if (level >= (HDR_ENABLE_LEVEL_MIN-1))
+        HDR_ENABLE_PORT |= (1 << HDR_ENABLE_PIN);
+    else
+        HDR_ENABLE_PORT &= ~(1 << HDR_ENABLE_PIN);
+
+    // set these in successive clock cycles to avoid getting out of sync
+    // (minimizes ramp bumps when changing gears)
+    DAC_LVL  = dac_lvl;
+    DAC_VREF = dac_vref;
+
+    if (noflash) {
+        // wait for flash prevention to finish
+        delay_4ms(IN_NFET_DELAY_TIME/4);
+        IN_NFET_ENABLE_PORT &= ~(1 << IN_NFET_ENABLE_PIN);
+    }
+}
+
+bool gradual_tick_main(uint8_t gt) {
+    // if HDR and Vref "engine gear" is the same, do a small adjustment...
+    // otherwise, simply jump to the next ramp level
+    //   and let set_level() handle any gear changes
+
+    // different gear = full adjustment
+    PWM2_DATATYPE vref_next = PWM2_GET(gt);
+    if (vref_next != DAC_VREF) return true;  // let parent set_level() for us
+
+    // same gear = small adjustment
+    PWM1_DATATYPE dac_now  = DAC_LVL >> 6;  // register is left-aligned
+    PWM1_DATATYPE dac_next = PWM1_GET(gt);
+
+    // only adjust 1 dac level, max is 1023
+    // (but speed it up with "#define GRADUAL_ADJUST_SPEED  4" elsewhere)
+    GRADUAL_ADJUST_SIMPLE(dac_next, dac_now);
+
+    DAC_LVL = dac_now << 6;
+
+    if (dac_next == dac_now) return true;  // done
+
+    return false;  // not done yet
+}
+
+
+#ifdef USE_VOLTAGE_DIVIDER
+uint8_t voltage_raw2cooked(uint16_t measurement) {
+    // In : 65535 * BATTLVL / 1.024V
+    // Out: uint8_t: Vbat * 50
+    // BATTLVL = Vbat * (100.0/(330+100)) = Vbat / 4.3
+    // So, Out = In * 4.3 / 1280
+    uint8_t result = (uint32_t)(measurement + (65535 * 4 / 1024))
+                     * 43 / 12800;
+    return result;
+}
+#endif
+
+#ifdef USE_WEAK_BATTERY_PROTECTION
+uint8_t quick_volt_measurement() {
+    // wait for next hardware measurement
+    irq_adc = 0;
+    while (! irq_adc) {}
+    uint16_t m = adc_raw[0];
+    return voltage_raw2cooked(m);
+}
+
+void detect_weak_battery() {
+    // guess at the cell strength with a load test...
+    // - measure voltage with LEDs off
+    // - measure again with LEDs on
+    // - determine how much to limit power
+    //   (ramp up until battery becomes unstable)
+    // - blink to indicate weak battery mode, if active
+
+    ramp_level_hard_limit = 0;
+
+    uint16_t resting, loaded;
+
+    // baseline unloaded measurement
+    set_level(0);
+    for (uint8_t i=0; i<32; i++) { delay_zero(); }  // wait about 10ms
+    //resting = voltage_raw2cooked(adc_smooth[0]);  // probably not settled yet
+    resting = quick_volt_measurement();
+
+    // set thresholds per cell type
+    uint8_t sag_limit, crit_voltage;
+    if (resting > DUAL_VOLTAGE_FLOOR) {
+        sag_limit    = WEAK_BATTERY_SAG_THRESHOLD_LIION;
+        crit_voltage = VOLTAGE_LOW;
+    } else {
+        sag_limit    = WEAK_BATTERY_SAG_THRESHOLD_AA;
+        crit_voltage = DUAL_VOLTAGE_LOW_LOW;
+    }
+
+    // progressively turn up the power until sag threshold is hit,
+    // or critical voltage, or max testing level is reached
+    for (uint8_t l=1; l<WEAK_BATTERY_TEST_MAX_LEVEL; l++) {
+        set_level(l);
+        loaded = quick_volt_measurement();
+        int16_t sag = resting - loaded;
+        if ( (loaded <= crit_voltage) || (sag > sag_limit) ) {
+            // battery empty or weak
+            ramp_level_hard_limit = l;
+            break;
+        }
+    }
+    set_level(0);
+
+    // Blink again if not in full-power mode:
+    // - 1 blink total: Strong Li-ion cell, full power enabled
+    // - 2 blinks: Strong AA cell, max AA power enabled
+    //   (not used on this driver, strong AA uses mode 1)
+    // - 3 blinks: Weak battery, power severely limited
+
+    uint8_t extra_blinks = 0;
+    if (ramp_level_hard_limit) extra_blinks += 2;
+
+    for (uint8_t i=0; i<extra_blinks; i++) {
+        delay_4ms(300/4);
+        blink_once();
+    }
+
+    #ifdef USE_WEAK_BATTERY_PROTECTION_READOUT
+    // this numeric display isn't really needed by default,
+    // but the code remains in case anyone wants to use it
+    if (ramp_level_hard_limit) {
+        delay_4ms(255);
+        // not booted far enough for this to work yet
+        //blink_num(ramp_level_hard_limit);
+        uint8_t tens, ones;
+        tens = ramp_level_hard_limit / 10;
+        ones = ramp_level_hard_limit % 10;
+        for (uint8_t i=0; i<tens; i++) {
+            delay_4ms(300/4);
+            blink_once();
+        }
+        delay_4ms(600/4);
+        for (uint8_t i=0; i<ones; i++) {
+            delay_4ms(300/4);
+            blink_once();
+        }
+    }
+    #endif  // ifdef USE_WEAK_BATTERY_PROTECTION_READOUT
+
+}
+#endif  // ifdef USE_WEAK_BATTERY_PROTECTION
+