mirror of https://github.com/ARMmbed/mbed-os.git
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
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/* mbed Microcontroller Library
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* (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2018 All rights reserved
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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 "gpio_api.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "gpio_include.h"
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extern const PinMap PinMap_GPIO_IRQ[];
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void gpio_init(gpio_t *obj, PinName pin)
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{
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// Store above pin mask, pin name into GPIO object
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obj->pin = pin;
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obj->mask = gpio_set(pin);
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obj->port = (PortName)(pin >> 3);
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TSB_CG->FSYSENA |= (1 << (obj->port));
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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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uint32_t gpio_set(PinName pin)
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{
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// Check that pin is valid
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MBED_ASSERT(pin != (PinName)NC);
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// Set pin function as GPIO pin
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pin_function(pin, GPIO_DATA);
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// Return pin mask
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return (1 << (pin & 0x07));
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}
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// Set gpio object pin direction
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void gpio_dir(gpio_t *obj, PinDirection direction)
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{
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// Set direction
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switch (direction) {
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case PIN_INPUT:
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pin_function(obj->pin, PIN_INPUT);
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break;
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case PIN_OUTPUT:
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pin_function(obj->pin, PIN_OUTPUT);
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break;
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case PIN_INOUT:
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pin_function(obj->pin, PIN_INOUT);
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break;
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default:
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error("Invalid direction\n");
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break;
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}
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}
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// Write gpio object pin data
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void gpio_write(gpio_t *obj, int value)
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{
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int port = 0;
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uint8_t bit = 0;
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uint32_t base = 0;
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// Calculate port and pin position
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port = PIN_PORT(obj->pin);
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bit = PIN_POS(obj->pin);
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base = BITBAND_PORT_BASE(port);
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base = BITBAND_PORT_MODE_BASE(base, GPIO_Mode_DATA);
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if (value == GPIO_PIN_SET) {
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BITBAND_PORT_SET(base, bit);
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} else if (value == GPIO_PIN_RESET) {
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BITBAND_PORT_CLR(base, bit);
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} else {
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error("Invalid value\n");
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}
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}
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// Read gpio object pin data
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int gpio_read(gpio_t *obj)
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{
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int port = 0;
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uint8_t bit = 0;
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uint32_t base = 0;
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uint32_t val = 0;
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int BitValue = 0;
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// Calculate port and pin position
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port = PIN_PORT(obj->pin);
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bit = PIN_POS(obj->pin);
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base = BITBAND_PORT_BASE(port);
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base = BITBAND_PORT_MODE_BASE(base, GPIO_Mode_DATA);
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BITBAND_PORT_READ(val, base, bit);
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if (val == GPIO_PIN_RESET) {
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BitValue = GPIO_PIN_RESET;
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} else {
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BitValue = GPIO_PIN_SET;
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}
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return (BitValue);
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}
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