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machine/atsamd21: add GPIO_INPUT_PULLUP and GPIO_INPUT_PULLDOWN GPIO pin config options

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Signed-off-by: Ron Evans <ron@hybridgroup.com>
This commit is contained in:
Ron Evans
2019-02-24 21:19:12 +01:00
parent c56b2a45fa
commit 34939ab422
1 changed files with 36 additions and 13 deletions
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src/machine/machine_atsamd21.go
+23
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@@ -34,6 +34,7 @@ const (
GPIO_OUTPUT = 11 GPIO_OUTPUT = 11
GPIO_PWM = GPIO_TIMER GPIO_PWM = GPIO_TIMER
GPIO_PWM_ALT = GPIO_TIMER_ALT GPIO_PWM_ALT = GPIO_TIMER_ALT
GPIO_INPUT_PULLDOWN = 12
) )
// Hardware pins // Hardware pins
@@ -127,6 +128,28 @@ func (p GPIO) Configure(config GPIOConfig) {
p.setPinCfg(sam.PORT_PINCFG0_INEN) p.setPinCfg(sam.PORT_PINCFG0_INEN)
} }
case GPIO_INPUT_PULLDOWN:
if p.Pin < 32 {
sam.PORT.DIRCLR0 = (1 << p.Pin)
sam.PORT.OUTCLR0 = (1 << p.Pin)
p.setPinCfg(sam.PORT_PINCFG0_INEN | sam.PORT_PINCFG0_PULLEN)
} else {
sam.PORT.DIRCLR1 = (1<<p.Pin - 32)
sam.PORT.OUTCLR1 = (1<<p.Pin - 32)
p.setPinCfg(sam.PORT_PINCFG0_INEN | sam.PORT_PINCFG0_PULLEN)
}
case GPIO_INPUT_PULLUP:
if p.Pin < 32 {
sam.PORT.DIRCLR0 = (1 << p.Pin)
sam.PORT.OUTSET0 = (1 << p.Pin)
p.setPinCfg(sam.PORT_PINCFG0_INEN | sam.PORT_PINCFG0_PULLEN)
} else {
sam.PORT.DIRCLR1 = (1<<p.Pin - 32)
sam.PORT.OUTSET1 = (1<<p.Pin - 32)
p.setPinCfg(sam.PORT_PINCFG0_INEN | sam.PORT_PINCFG0_PULLEN)
}
case GPIO_SERCOM: case GPIO_SERCOM:
if p.Pin&1 > 0 { if p.Pin&1 > 0 {
// odd pin, so save the even pins // odd pin, so save the even pins