mirror of
https://github.com/dougg3/mac-rom-simm-programmer.git
synced 2024-11-29 21:49:19 +00:00
131 lines
2.7 KiB
C
131 lines
2.7 KiB
C
/*
|
|
* gpio.c
|
|
*
|
|
* Created on: Jun 19, 2023
|
|
* Author: Doug
|
|
*
|
|
* Copyright (C) 2011-2023 Doug Brown
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include "../gpio.h"
|
|
#include "nuvoton/NuMicro.h"
|
|
|
|
/// The GPIO ports available on the M258KE
|
|
static GPIO_T * const gpioRegs[] = {
|
|
PA,
|
|
PB,
|
|
PC,
|
|
PD,
|
|
PE,
|
|
PF
|
|
};
|
|
|
|
/** Sets the direction of a GPIO pin.
|
|
*
|
|
* @param pin The pin
|
|
* @param output True if it should be an output, false if it should be an input
|
|
*/
|
|
void GPIO_SetDirection(GPIOPin pin, bool output)
|
|
{
|
|
if (output)
|
|
{
|
|
uint32_t tmp = gpioRegs[pin.port]->MODE;
|
|
tmp &= ~(2UL << 2*pin.pin);
|
|
tmp |= (1UL << 2*pin.pin);
|
|
gpioRegs[pin.port]->MODE = tmp;
|
|
}
|
|
else
|
|
{
|
|
gpioRegs[pin.port]->MODE &= ~(3UL << 2*pin.pin);
|
|
}
|
|
}
|
|
|
|
/** Sets whether an input GPIO pin is pulled up
|
|
*
|
|
* @param pin The pin
|
|
* @param pullup True if it should be pulled up, false if not
|
|
*/
|
|
void GPIO_SetPullup(GPIOPin pin, bool pullup)
|
|
{
|
|
if (pullup)
|
|
{
|
|
uint32_t tmp = gpioRegs[pin.port]->PUSEL;
|
|
tmp |= (1UL << 2*pin.pin);
|
|
gpioRegs[pin.port]->PUSEL = tmp;
|
|
}
|
|
else
|
|
{
|
|
gpioRegs[pin.port]->PUSEL &= ~(1UL << 2*pin.pin);
|
|
}
|
|
}
|
|
|
|
/** Sets whether an input GPIO pin is pulled down
|
|
*
|
|
* @param pin The pin
|
|
* @param pulldown True if it should be pulled down, false if not
|
|
*/
|
|
void GPIO_SetPulldown(GPIOPin pin, bool pulldown)
|
|
{
|
|
if (pulldown)
|
|
{
|
|
uint32_t tmp = gpioRegs[pin.port]->PUSEL;
|
|
tmp |= (2UL << 2*pin.pin);
|
|
gpioRegs[pin.port]->PUSEL = tmp;
|
|
}
|
|
else
|
|
{
|
|
gpioRegs[pin.port]->PUSEL &= ~(2UL << 2*pin.pin);
|
|
}
|
|
}
|
|
|
|
/** Turns a GPIO pin on (sets it high)
|
|
*
|
|
* @param pin The pin
|
|
*/
|
|
void GPIO_SetOn(GPIOPin pin)
|
|
{
|
|
gpioRegs[pin.port]->DOUT |= (1 << pin.pin);
|
|
}
|
|
|
|
/** Turns a GPIO pin off (sets it low)
|
|
*
|
|
* @param pin The pin
|
|
*/
|
|
void GPIO_SetOff(GPIOPin pin)
|
|
{
|
|
gpioRegs[pin.port]->DOUT &= ~(1 << pin.pin);
|
|
}
|
|
|
|
/** Toggles a GPIO pin
|
|
*
|
|
* @param pin The pin
|
|
*/
|
|
void GPIO_Toggle(GPIOPin pin)
|
|
{
|
|
gpioRegs[pin.port]->DOUT ^= (1 << pin.pin);
|
|
}
|
|
|
|
/** Reads the input status of a GPIO pin
|
|
*
|
|
* @param pin The pin
|
|
* @return True if it's high, false if it's low
|
|
*/
|
|
bool GPIO_Read(GPIOPin pin)
|
|
{
|
|
return gpioRegs[pin.port]->PIN & (1 << pin.pin);
|
|
}
|