inky73: Add busy wait timeout.

Add a timeout to fix Inky 7.3" hanging on batteries.

Basically assumes the update has finished if it takes > 45s, and allows a subsequent attempt
rather than hanging indefinitely.

Raised, texted and fixed by w3stbam: https://github.com/pimoroni/pimoroni-pico/pull/900

Rewritten as mentioned in the PR.

libraries/cosmic_unicorn/cosmic_unicorn.cpp

@@ -494,14 +494,11 @@ namespace pimoroni {
   void CosmicUnicorn::set_brightness(float value) {
     value = value < 0.0f ? 0.0f : value;
     value = value > 1.0f ? 1.0f : value;
-    // Max brightness is - in fact - 256 since it's applied with:
-    // result = (channel * brightness) >> 8
-    // eg: (255 * 256) >> 8 == 255
     this->brightness = floor(value * 256.0f);
   }
 
   float CosmicUnicorn::get_brightness() {
-    return this->brightness / 256.0f;
+    return this->brightness / 255.0f;
   }
 
   void CosmicUnicorn::adjust_brightness(float delta) {

libraries/galactic_unicorn/galactic_unicorn.cpp

@@ -488,14 +488,11 @@ namespace pimoroni {
   void GalacticUnicorn::set_brightness(float value) {
     value = value < 0.0f ? 0.0f : value;
     value = value > 1.0f ? 1.0f : value;
-    // Max brightness is - in fact - 256 since it's applied with:
-    // result = (channel * brightness) >> 8
-    // eg: (255 * 256) >> 8 == 255
     this->brightness = floor(value * 256.0f);
   }
 
   float GalacticUnicorn::get_brightness() {
-    return this->brightness / 256.0f;
+    return this->brightness / 255.0f;
   }
 
   void GalacticUnicorn::adjust_brightness(float delta) {

libraries/stellar_unicorn/stellar_unicorn.cpp

@@ -485,14 +485,11 @@ namespace pimoroni {
   void StellarUnicorn::set_brightness(float value) {
     value = value < 0.0f ? 0.0f : value;
     value = value > 1.0f ? 1.0f : value;
-    // Max brightness is - in fact - 256 since it's applied with:
-    // result = (channel * brightness) >> 8
-    // eg: (255 * 256) >> 8 == 255
     this->brightness = floor(value * 256.0f);
   }
 
   float StellarUnicorn::get_brightness() {
-    return this->brightness / 256.0f;
+    return this->brightness / 255.0f;
   }
 
   void StellarUnicorn::adjust_brightness(float delta) {

micropython/examples/breakout_ltr559/interrupt.py

@@ -1,30 +0,0 @@
-import time
-from machine import Pin
-from pimoroni_i2c import PimoroniI2C
-from breakout_ltr559 import BreakoutLTR559
-
-PINS_BREAKOUT_GARDEN = {"sda": 4, "scl": 5}
-PINS_PICO_EXPLORER = {"sda": 20, "scl": 21}
-PIN_INTERRUPT = 22  # 3 for Breakout Garden
-
-i2c = PimoroniI2C(**PINS_PICO_EXPLORER)
-ltr = BreakoutLTR559(i2c, interrupt=PIN_INTERRUPT)
-interrupt = Pin(PIN_INTERRUPT, Pin.IN, Pin.PULL_DOWN)
-
-ltr.light_threshold(0, 10)  # COUNTS, NOT LUX!!!
-ltr.proximity_threshold(0, 10)
-
-
-def read(pin):
-    reading = ltr.get_reading()
-    if reading is not None:
-        print("T: ", time.ticks_ms(), " Lux: ", reading[BreakoutLTR559.LUX], " Prox: ", reading[BreakoutLTR559.PROXIMITY])
-
-
-interrupt.irq(trigger=Pin.IRQ_RISING, handler=read)
-
-part_id = ltr.part_id()
-print("Found LTR559. Part ID: 0x", '{:02x}'.format(part_id), sep="")
-
-while True:
-    pass