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sam: fix register access for interrupts pins in samd51 (#1141)

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* machine/samd51: fix register access for interrupts pins in samd51
This commit is contained in:
sago35
2020-05-31 01:03:46 +09:00
committed by GitHub
parent 5c8d4e54d6
commit b92fad8da6
1 changed files with 2 additions and 2 deletions
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src/machine/machine_atsamd51.go
+2 -2
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@@ -335,7 +335,7 @@ func (p Pin) SetInterrupt(change PinChange, callback func(Pin)) error {
pinCallbacks[extint] = callback
interruptPins[extint] = p
if (sam.EIC.CTRLA.Get() & 0x02) == 0 {
if !sam.EIC.CTRLA.HasBits(sam.EIC_CTRLA_ENABLE) {
// EIC peripheral has not yet been initialized. Initialize it now.
// The EIC needs two clocks: CLK_EIC_APB and GCLK_EIC. CLK_EIC_APB is
@@ -349,7 +349,7 @@ func (p Pin) SetInterrupt(change PinChange, callback func(Pin)) error {
}
// CONFIG register is enable-protected, so disable EIC.
sam.EIC.CTRLA.Set(0)
sam.EIC.CTRLA.ClearBits(sam.EIC_CTRLA_ENABLE)
// Configure this pin. Set the 4 bits of the EIC.CONFIGx register to the
// sense value (filter bit set to 0, sense bits set to the change value).