mirror of https://github.com/ARMmbed/mbed-os.git
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbed_assert.h"
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#include "gpio_api.h"
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#include "pinmap.h"
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#include "fsl_gpio.h"
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uint32_t gpio_set(PinName pin)
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{
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MBED_ASSERT(pin != (PinName)NC);
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pin_function(pin, 0);
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return (1 << ((int)pin & 0x1F));
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}
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void gpio_init(gpio_t *obj, PinName pin)
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{
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obj->pin = pin;
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if (pin == (PinName)NC)
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return;
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pin_function(pin, 0);
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}
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void gpio_mode(gpio_t *obj, PinMode mode)
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{
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pin_mode(obj->pin, mode);
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}
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void gpio_dir(gpio_t *obj, PinDirection direction)
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{
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MBED_ASSERT(obj->pin != (PinName)NC);
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uint32_t pin_number = obj->pin & 0x1F;
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uint8_t port_number = obj->pin / 32;
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switch (direction) {
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case PIN_INPUT:
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GPIO->DIR[port_number] &= ~(1U << pin_number);
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break;
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case PIN_OUTPUT:
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GPIO->DIR[port_number] |= (1U << pin_number);
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break;
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}
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}
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void gpio_write(gpio_t *obj, int value)
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{
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MBED_ASSERT(obj->pin != (PinName)NC);
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uint32_t pin_number = obj->pin & 0x1F;
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uint8_t port_number = obj->pin / 32;
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GPIO_WritePinOutput(GPIO, port_number, pin_number, value);
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}
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int gpio_read(gpio_t *obj)
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{
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MBED_ASSERT(obj->pin != (PinName)NC);
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uint32_t pin_number = obj->pin & 0x1F;
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uint8_t port_number = obj->pin / 32;
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return (int)GPIO_ReadPinInput(GPIO, port_number, pin_number);
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}
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