Fit Tiny Relay Companion while retaining GPIO and storage

test/test_ed25519_compact_field.py

@@ -233,6 +233,7 @@ int main(void) {
                     profiles.append((ini.parent.name, section))
         self.assertEqual(sorted(profiles), [
             ("rak3x72", "[env:RAK_3x72_companion_radio_usb]"),
+            ("tiny_relay", "[env:Tiny_Relay_companion_radio_usb]"),
             ("wio-e5-dev", "[env:wio-e5_companion_radio_usb]"),
             ("wio-e5-mini", "[env:wio-e5-mini_companion_radio_usb]"),
         ])

test/test_ed25519_compact_scalar.py

@@ -139,6 +139,7 @@ int main(void) {
                     profiles.append((ini.parent.name, section))
         self.assertEqual(sorted(profiles), [
             ("rak3x72", "[env:RAK_3x72_companion_radio_usb]"),
+            ("tiny_relay", "[env:Tiny_Relay_companion_radio_usb]"),
             ("wio-e5-dev", "[env:wio-e5_companion_radio_usb]"),
             ("wio-e5-mini", "[env:wio-e5-mini_companion_radio_usb]"),
         ])

test/test_stm32_companion_profile.py

@@ -61,6 +61,18 @@ class STM32CompanionProfileTest(unittest.TestCase):
                              r"-D\s+ED25519_COMPACT_" + definition + r"=1\b")
 
 
+class TinyRelaySTM32CompanionProfileTest(STM32CompanionProfileTest):
+    variant = "tiny_relay"
+    target = "Tiny_Relay_companion_radio_usb"
+    base = "Tiny_Relay"
+
+    def test_relay_gpio_and_adc_monitor_are_retained(self):
+        header = (ROOT / "variants" / self.variant / "target.h").read_text()
+        self.assertIn("digitalWrite(PA0, values & 1)", header)
+        self.assertIn("digitalWrite(PA1, (values & 2) >> 1)", header)
+        self.assertIn("analogRead(PIN_VBAT_READ)", header)
+
+
 class WioDevSTM32CompanionProfileTest(STM32CompanionProfileTest):
     variant = "wio-e5-dev"
     target = "wio-e5_companion_radio_usb"

variants/tiny_relay/platformio.ini

@@ -72,7 +72,12 @@ extends = Tiny_Relay
 platform_packages = platformio/toolchain-gccarmnoneeabi@^1.140201.0
 build_unflags = -Os
 build_flags = ${Tiny_Relay.build_flags}
+  ; GPIO relay controls and ADC monitoring do not use PWM/tone timers.
+  -D RADIOLIB_TONE_UNSUPPORTED
+  -D HAL_TIM_MODULE_ONLY
   -D ED25519_COMPACT_SHA512=1 ; same hash rounds, compact loop preserves the filesystem boundary
+  -D ED25519_COMPACT_SCALAR=1 ; equivalent fixed-loop arithmetic preserves Companion capacities
+  -D ED25519_COMPACT_FIELD=1 ; share field products without moving the filesystem boundary
   -Oz
   -flto
   -fno-inline-small-functions