mirror of https://github.com/ARMmbed/mbed-os.git
144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/* 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 "port_api.h"
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#include "mbed_assert.h"
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#include "mbed_error.h"
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#include "txz_gpio.h"
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#include "pinmap.h"
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#define PORT_PIN_NUM (8)
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#define ALT_FUNC_GPIO (0)
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extern _gpio_t gpio_port_add;
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static void gpio_pin_dir(port_t *obj, PinDirection dir, uint32_t pin_num);
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PinName port_pin(PortName port, int pin_n)
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{
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PinName pin = NC;
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pin = (PinName)((port << 3) | pin_n);
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return pin;
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}
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void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
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{
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uint8_t i = 0;
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// Assert that port is valid
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MBED_ASSERT(port <= PortY);
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// Store port and port mask for future use
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obj->port = port;
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obj->mask = mask;
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// Enable the clock for particular port
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_gpio_init(&gpio_port_add, obj->port);
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// Set port function and port direction
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for (i = 0; i < PORT_PIN_NUM; i++) {
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// If the pin is used
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if (obj->mask & (1 << i)) {
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pin_function(port_pin(obj->port, i), dir);
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}
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}
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}
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void port_mode(port_t *obj, PinMode mode)
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{
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uint8_t i = 0;
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// Assert that port is valid
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MBED_ASSERT(obj->port <= PortY);
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// Set mode for masked pins
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for (i = 0; i < PORT_PIN_NUM; i++) {
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// If the pin is used
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if (obj->mask & (1 << i)) {
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pin_mode(port_pin(obj->port, i), mode);
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}
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}
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}
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void port_dir(port_t *obj, PinDirection dir)
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{
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uint8_t i = 0;
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// Assert that port is valid
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MBED_ASSERT(obj->port <= PortY);
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for (i = 0; i < PORT_PIN_NUM; i++) {
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// Set direction for masked pins
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if (obj->mask & (1 << i)) {
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gpio_pin_dir(obj, dir, i);
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}
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}
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}
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void port_write(port_t *obj, int value)
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{
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uint32_t port_data = 0;
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uint32_t data = 0;
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// Assert that port is valid
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MBED_ASSERT(obj->port <= PortY);
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// Get current data of port
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gpio_read_mode(&gpio_port_add, obj->port, GPIO_Mode_DATA, &port_data);
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// Calculate data to write to masked pins
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data = (port_data & ~obj->mask) | (value & obj->mask);
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// Write data to masked pins of the port
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gpio_write_mode(&gpio_port_add, obj->port, GPIO_Mode_DATA, data);
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}
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int port_read(port_t *obj)
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{
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uint32_t port_data = 0;
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uint32_t data = 0;
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// Assert that port is valid
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MBED_ASSERT(obj->port <= PortY);
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// Get current data of port
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gpio_read_mode(&gpio_port_add, obj->port, GPIO_Mode_DATA, &port_data);
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// Calculate data of masked pins
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data = port_data & obj->mask;
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return data;
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}
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static void gpio_pin_dir(port_t *obj, PinDirection dir, uint32_t pin_num)
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{
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switch (dir) {
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case PIN_INPUT:
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// Set pin input
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gpio_func(&gpio_port_add, (gpio_gr_t)obj->port, (gpio_num_t)pin_num, (uint32_t)ALT_FUNC_GPIO, GPIO_PIN_INPUT);
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break;
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case PIN_OUTPUT:
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// Set pin output
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gpio_func(&gpio_port_add, (gpio_gr_t)obj->port, (gpio_num_t)pin_num, (uint32_t)ALT_FUNC_GPIO, GPIO_PIN_OUTPUT);
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break;
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case PIN_INOUT:
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// Set pin both input and output
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gpio_func(&gpio_port_add, (gpio_gr_t)obj->port, (gpio_num_t)pin_num, (uint32_t)ALT_FUNC_GPIO, GPIO_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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