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cpu/ezr32wg/gpio: do not clear output pin on init

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This commit is contained in:
Hauke Petersen 2017-06-12 17:32:54 +02:00
parent be456915e9
commit 7342974b17
1 changed files with 6 additions and 2 deletions
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8
cpu/ezr32wg/periph/gpio.c
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@ -60,17 +60,21 @@ int gpio_init(gpio_t pin, gpio_mode_t mode)
GPIO_P_TypeDef *port = _port(pin); GPIO_P_TypeDef *port = _port(pin);
uint32_t pin_pos = _pin_pos(pin); uint32_t pin_pos = _pin_pos(pin);
if (mode == GPIO_IN_PD) {
return -1;
}
/* enable power for the GPIO module */ /* enable power for the GPIO module */
CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO; CMU->HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
/* configure the mode */ /* configure the mode */
port->MODE[pin_pos >> 3] &= ~(0xf << ((pin_pos & 0x7) * 4)); port->MODE[pin_pos >> 3] &= ~(0xf << ((pin_pos & 0x7) * 4));
port->MODE[pin_pos >> 3] |= (mode << ((pin_pos & 0x7) * 4)); port->MODE[pin_pos >> 3] |= (mode << ((pin_pos & 0x7) * 4));
/* reset output register */
port->DOUTCLR = (1 << pin_pos);
/* if input with pull-up, set the data out register */ /* if input with pull-up, set the data out register */
if (mode == GPIO_IN_PU) { if (mode == GPIO_IN_PU) {
port->DOUTSET = (1 << pin_pos); port->DOUTSET = (1 << pin_pos);
} else if (mode == GPIO_IN) {
port->DOUTCLR = (1 << pin_pos);
} }
return 0; return 0;