go-packages/go-rpio
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Support Pi3 and earlier boards

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This commit is contained in:
Walt Drummond 2019-11-28 11:39:57 -08:00
parent be82a08f8a
commit 9f58572951
1 changed files with 4 additions and 3 deletions
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7
rpio.go
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@ -98,7 +98,7 @@ const (
memLength = 4096
)
// BCM 2711 has a differnet mechanism for pin pull-up/pull-down/enable
// BCM 2711 has a different mechanism for pull-up/pull-down/enable
const (
GPPUPPDN0 = 57 // Pin pull-up/down for pins 15:0
GPPUPPDN1 = 58 // Pin pull-up/down for pins 31:16
@ -145,6 +145,7 @@ const (
PullOff Pull = iota
PullDown
PullUp
PullNone
)
// Edge events
@ -252,7 +253,7 @@ func (pin Pin) PullOff() {
func (pin Pin) ReadPull() Pull {
if !isBCM2711() {
return PullOff // TODO: Can you read pull state on other Pi boards?
return PullNone // Can't read pull-up/pull-down state on other Pi boards
}
reg := GPPUPPDN0 + (uint8(pin) >> 4)
@ -265,7 +266,7 @@ func (pin Pin) ReadPull() Pull {
case 2:
return PullDown
default:
return PullOff
return PullNone // Invalid
}
}