Merge pull request adafruit#7865 from CanyonCasa/reset

tannewt · web-flow · commit ebfde5c3fa86 · 2023-04-18T08:42:23.000-07:00
Reset stuck low detection
diff --git a/shared-module/onewireio/OneWire.c b/shared-module/onewireio/OneWire.c
@@ -59,8 +59,10 @@ bool common_hal_onewireio_onewire_reset(onewireio_onewire_obj_t *self) {
     common_hal_mcu_delay_us(70);
     bool value = common_hal_digitalio_digitalinout_get_value(&self->pin);
     common_hal_mcu_delay_us(410);
+    // test if bus returned high (idle) and not stuck at low
+    bool idle = common_hal_digitalio_digitalinout_get_value(&self->pin);
     common_hal_mcu_enable_interrupts();
-    return value;
+    return value || !idle;
 }
 
 bool common_hal_onewireio_onewire_read_bit(onewireio_onewire_obj_t *self) {
