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stm32: support pin input interrupts

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This commit is contained in:
Kenneth Bell
2021-05-31 17:45:49 -07:00
committed by Ron Evans
parent c017ed2242
commit 5f9e339cf3
16 changed files with 527 additions and 0 deletions
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src/machine/machine_stm32l4.go
+54
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@@ -203,6 +203,60 @@ func enableAltFuncClock(bus unsafe.Pointer) {
}
}
func handlePinInterrupt(pin uint8) {
if stm32.EXTI.PR1.HasBits(1 << pin) {
// Writing 1 to the pending register clears the
// pending flag for that bit
stm32.EXTI.PR1.Set(1 << pin)
callback := pinCallbacks[pin]
if callback != nil {
callback(interruptPins[pin])
}
}
}
func (p Pin) registerInterrupt() interrupt.Interrupt {
pin := uint8(p) % 16
switch pin {
case 0:
return interrupt.New(stm32.IRQ_EXTI0, func(interrupt.Interrupt) { handlePinInterrupt(0) })
case 1:
return interrupt.New(stm32.IRQ_EXTI1, func(interrupt.Interrupt) { handlePinInterrupt(1) })
case 2:
return interrupt.New(stm32.IRQ_EXTI2, func(interrupt.Interrupt) { handlePinInterrupt(2) })
case 3:
return interrupt.New(stm32.IRQ_EXTI3, func(interrupt.Interrupt) { handlePinInterrupt(3) })
case 4:
return interrupt.New(stm32.IRQ_EXTI4, func(interrupt.Interrupt) { handlePinInterrupt(4) })
case 5:
return interrupt.New(stm32.IRQ_EXTI9_5, func(interrupt.Interrupt) { handlePinInterrupt(5) })
case 6:
return interrupt.New(stm32.IRQ_EXTI9_5, func(interrupt.Interrupt) { handlePinInterrupt(6) })
case 7:
return interrupt.New(stm32.IRQ_EXTI9_5, func(interrupt.Interrupt) { handlePinInterrupt(7) })
case 8:
return interrupt.New(stm32.IRQ_EXTI9_5, func(interrupt.Interrupt) { handlePinInterrupt(8) })
case 9:
return interrupt.New(stm32.IRQ_EXTI9_5, func(interrupt.Interrupt) { handlePinInterrupt(9) })
case 10:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(10) })
case 11:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(11) })
case 12:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(12) })
case 13:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(13) })
case 14:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(14) })
case 15:
return interrupt.New(stm32.IRQ_EXTI15_10, func(interrupt.Interrupt) { handlePinInterrupt(15) })
}
return interrupt.Interrupt{}
}
//---------- SPI related types and code
// SPI on the STM32Fxxx using MODER / alternate function pins