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revision: modify proposed pin HAL.

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2025-09-16 20:33:50 +02:00
parent f55c0b1853
commit dcf53ac04a
38 changed files with 554 additions and 554 deletions
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internal/legacy/pinhal.go
-75
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@@ -1,75 +0,0 @@
package legacy
import "errors"
// PinOutput represents a pin hardware abstraction layer for a pin that can output a digital signal.
// This is an alternative to drivers.PinOutput abstraction which is a function type. Pros and cons
// of both approaches have been discussed in the [relevant issue]. PinOutput should only be used
// to expose an initialization function of a driver that receives pins of this type. Ideally
// driver developers should also expose the initialization with drivers.Pin type:
//
// func New(p1, p2, p3 legacy.PinOutput) *Device {
// return NewWithPinfuncs(p1.Set, p2.Set, p3.Set)
// }
//
// func NewWithPinfuncs(p1, p2, p3 drivers.PinOutput) *Device {
// return &Device{p1:p1, p2:p2, p3:p3}
// }
//
// [relevant issue]: https://github.com/tinygo-org/drivers/pull/749/files
type PinOutput interface {
Set(level bool)
}
// PinInput represents a pin hardware abstraction layer. See [PinOutput] for
// more information on why this is "legacy".
type PinInput interface {
Get() (level bool)
}
// ConfigurePinOut is a legacy function used to configure pins as outputs.
//
// Deprecated: Do not configure pins in drivers.
// This is a legacy feature and should only be used by drivers that
// previously configured pins in initialization to avoid breaking users.
func ConfigurePinOut(po PinOutput) {
configurePinOut(po)
}
// ConfigurePinInput is a legacy function used to configure pins as inputs.
//
// Deprecated: Do not configure pins in drivers.
// This is a legacy feature and should only be used by drivers that
// previously configured pins in initialization to avoid breaking users.
func ConfigurePinInputPulldown(pi PinInput) {
configurePinInputPulldown(pi)
}
// ConfigurePinInput is a legacy function used to configure pins as inputs.
//
// Deprecated: Do not configure pins in drivers.
// This is a legacy feature and should only be used by drivers that
// previously configured pins in initialization to avoid breaking users.
func ConfigurePinInput(pi PinInput) {
configurePinInput(pi)
}
// ConfigurePinInput is a legacy function used to configure pins as inputs.
//
// Deprecated: Do not configure pins in drivers.
// This is a legacy feature and should only be used by drivers that
// previously configured pins in initialization to avoid breaking users.
func ConfigurePinInputPullup(pi PinInput) {
configurePinInputPullup(pi)
}
// PinIsNoPin returns true if the argument is a machine.Pin type and is the machine.NoPin predeclared type.
//
// Deprecated: Drivers do not require pin knowledge from now on.
func PinIsNoPin(pin any) bool {
return pinIsNoPin(pin)
}
var (
ErrConfigBeforeInstantiated = errors.New("device must be instantiated with New before calling Configure method")
)
internal/legacy/pinhal_go.go
-9
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//go:build !baremetal
package legacy
func configurePinOut(p PinOutput) {}
func configurePinInput(p PinInput) {}
func configurePinInputPulldown(p PinInput) {}
func configurePinInputPullup(p PinInput) {}
func pinIsNoPin(a any) bool { return false }
internal/legacy/pinhal_nopulls.go
-10
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@@ -1,10 +0,0 @@
//go:build baremetal && fe310
package legacy
import "machine"
const (
pulldown = machine.PinInput
pullup = machine.PinInput
)
internal/legacy/pinhal_pulls.go
-13
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//go:build baremetal && !fe310
package legacy
import "machine"
// If you are getting a build error here you then we missed adding
// your CPU build tag to the list of CPUs that do not have pulldown/pullups.
// Add it above and in pinhal_nopulls! You should also add a smoketest for it :)
const (
pulldown = machine.PinInputPulldown
pullup = machine.PinInputPullup
)
internal/legacy/pinhal_tinygo.go
-33
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@@ -1,33 +0,0 @@
//go:build baremetal
package legacy
import "machine"
func configurePinOut(p PinOutput) {
configurePin(p, machine.PinOutput)
}
func configurePinInputPulldown(p PinInput) {
configurePin(p, pulldown) // some chips do not have pull down, in which case pulldown==machine.PinInput.
}
func configurePinInput(p PinInput) {
configurePin(p, machine.PinInput)
}
func configurePinInputPullup(p PinInput) {
configurePin(p, pullup) // some chips do not have pull up, in which case pullup==machine.PinInput.
}
func pinIsNoPin(a any) bool {
p, ok := a.(machine.Pin)
return ok && p == machine.NoPin
}
func configurePin(p any, mode machine.PinMode) {
machinePin, ok := p.(machine.Pin)
if ok {
machinePin.Configure(machine.PinConfig{Mode: mode})
}
}