mirror of https://github.com/ARMmbed/mbed-os.git
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/* mbed Microcontroller Library
|
|
* Copyright (c) 2006-2015 ARM Limited
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
#include "mbed_assert.h"
|
|
#include "gpio_api.h"
|
|
#include "pinmap.h"
|
|
|
|
uint32_t gpio_set(PinName pin) {
|
|
LPC_SC->SCS |= 1; // High speed GPIO is enabled on ports 0 and 1
|
|
|
|
pin_function(pin, 0);
|
|
|
|
return (1 << ((int)pin & 0x1F));
|
|
}
|
|
|
|
void gpio_init(gpio_t *obj, PinName pin) {
|
|
if (pin == (PinName)NC)
|
|
return;
|
|
obj->pin = pin;
|
|
if (pin == (PinName)NC)
|
|
return;
|
|
|
|
obj->mask = gpio_set(pin);
|
|
|
|
LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *) ((int)pin & ~0x1F);
|
|
|
|
obj->reg_set = &port_reg->FIOSET;
|
|
obj->reg_mask = &port_reg->FIOMASK;
|
|
obj->reg_clr = &port_reg->FIOCLR;
|
|
obj->reg_in = &port_reg->FIOPIN;
|
|
obj->reg_dir = &port_reg->FIODIR;
|
|
}
|
|
|
|
void gpio_mode(gpio_t *obj, PinMode mode) {
|
|
pin_mode(obj->pin, mode);
|
|
}
|
|
|
|
void gpio_dir(gpio_t *obj, PinDirection direction) {
|
|
if (obj->pin == (PinName)NC)
|
|
return;
|
|
switch (direction) {
|
|
case PIN_INPUT : *obj->reg_dir &= ~obj->mask; break;
|
|
case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
|
|
}
|
|
}
|