Disable Wire slave interrupt on ::end (#621)

Fixes #620

Disable Wire slave interrupt on ::end (#621)
Fixes #620
c4623f42 · Earle F. Philhower, III · GitHub · 1c85a1ca · c4623f42
Unverified Commit c4623f42 authored Jun 10, 2022 by Earle F. Philhower, III Committed by GitHub Jun 10, 2022
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libraries/Wire/src/Wire.cpp libraries/Wire/src/Wire.cpp +8 -1

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--- a/libraries/Wire/src/Wire.cpp
+++ b/libraries/Wire/src/Wire.cpp
@@ -132,7 +132,6 @@ void TwoWire::begin(uint8_t addr) {
    irq_set_exclusive_handler(irqNo, i2c_hw_index(_i2c) == 0 ? _handler0 : _handler1);
    irq_set_enabled(irqNo, true);

-
    gpio_set_function(_sda, GPIO_FUNC_I2C);
    gpio_pull_up(_sda);
    gpio_set_function(_scl, GPIO_FUNC_I2C);
@@ -192,7 +191,15 @@ void TwoWire::end() {
        // ERROR
        return;
    }
+
+    if (_slave) {
+        int irqNo = I2C0_IRQ + i2c_hw_index(_i2c);
+        irq_remove_handler(irqNo, i2c_hw_index(_i2c) == 0 ? _handler0 : _handler1);
+        irq_set_enabled(irqNo, false);
+    }
+
    i2c_deinit(_i2c);
+
    pinMode(_sda, INPUT);
    pinMode(_scl, INPUT);
    _running = false;