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Merge pull request #9 from awenisko/patch-2

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Update wiring_digital.c
This commit is contained in:
Erik Tylek Kettenburg 2015-10-10 02:13:12 -07:00
commit 836e363726
1 changed files with 10 additions and 3 deletions
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13
digistump-avr/cores/tiny/wiring_digital.c
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@ -35,21 +35,28 @@ void pinMode(uint8_t pin, uint8_t mode)
{
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
volatile uint8_t *reg;
volatile uint8_t *reg, *out;
if (port == NOT_A_PIN) return;
// JWS: can I let the optimizer do this?
reg = portModeRegister(port);
out = portOutputRegister(port);
if (mode == INPUT) {
uint8_t oldSREG = SREG;
cli();
cli();
*reg &= ~bit;
SREG = oldSREG;
} else if (mode == INPUT_PULLUP) {
uint8_t oldSREG = SREG;
cli();
*reg &= ~bit;
*out |= bit;
SREG = oldSREG;
} else {
uint8_t oldSREG = SREG;
cli();
cli();
*reg |= bit;
SREG = oldSREG;
}