131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/*
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* gpio.c
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*
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* Created on: Jun 19, 2023
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* Author: Doug
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*
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* Copyright (C) 2011-2023 Doug Brown
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#include "../gpio.h"
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#include "nuvoton/NuMicro.h"
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/// The GPIO ports available on the M258KE
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static GPIO_T * const gpioRegs[] = {
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PA,
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PB,
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PC,
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PD,
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PE,
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PF
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};
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/** Sets the direction of a GPIO pin.
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*
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* @param pin The pin
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* @param output True if it should be an output, false if it should be an input
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*/
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void GPIO_SetDirection(GPIOPin pin, bool output)
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{
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if (output)
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{
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uint32_t tmp = gpioRegs[pin.port]->MODE;
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tmp &= ~(2UL << 2*pin.pin);
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tmp |= (1UL << 2*pin.pin);
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gpioRegs[pin.port]->MODE = tmp;
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}
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else
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{
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gpioRegs[pin.port]->MODE &= ~(3UL << 2*pin.pin);
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}
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}
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/** Sets whether an input GPIO pin is pulled up
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*
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* @param pin The pin
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* @param pullup True if it should be pulled up, false if not
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*/
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void GPIO_SetPullup(GPIOPin pin, bool pullup)
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{
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if (pullup)
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{
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uint32_t tmp = gpioRegs[pin.port]->PUSEL;
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tmp |= (1UL << 2*pin.pin);
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gpioRegs[pin.port]->PUSEL = tmp;
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}
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else
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{
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gpioRegs[pin.port]->PUSEL &= ~(1UL << 2*pin.pin);
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}
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}
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/** Sets whether an input GPIO pin is pulled down
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*
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* @param pin The pin
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* @param pulldown True if it should be pulled down, false if not
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*/
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void GPIO_SetPulldown(GPIOPin pin, bool pulldown)
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{
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if (pulldown)
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{
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uint32_t tmp = gpioRegs[pin.port]->PUSEL;
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tmp |= (2UL << 2*pin.pin);
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gpioRegs[pin.port]->PUSEL = tmp;
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}
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else
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{
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gpioRegs[pin.port]->PUSEL &= ~(2UL << 2*pin.pin);
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}
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}
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/** Turns a GPIO pin on (sets it high)
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*
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* @param pin The pin
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*/
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void GPIO_SetOn(GPIOPin pin)
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{
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gpioRegs[pin.port]->DOUT |= (1 << pin.pin);
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}
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/** Turns a GPIO pin off (sets it low)
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*
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* @param pin The pin
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*/
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void GPIO_SetOff(GPIOPin pin)
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{
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gpioRegs[pin.port]->DOUT &= ~(1 << pin.pin);
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}
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/** Toggles a GPIO pin
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*
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* @param pin The pin
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*/
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void GPIO_Toggle(GPIOPin pin)
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{
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gpioRegs[pin.port]->DOUT ^= (1 << pin.pin);
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}
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/** Reads the input status of a GPIO pin
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*
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* @param pin The pin
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* @return True if it's high, false if it's low
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*/
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bool GPIO_Read(GPIOPin pin)
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{
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return gpioRegs[pin.port]->PIN & (1 << pin.pin);
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}
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