circuitpython/ports/renesas-ra/ra/ra_gpio.c

186 lines
5.6 KiB
C

/*
* The MIT License (MIT)
*
* Copyright (c) 2021,2022 Renesas Electronics Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdint.h>
#include "hal_data.h"
#include "ra_config.h"
#include "ra_gpio.h"
void ra_gpio_config(uint32_t pin, uint32_t mode, uint32_t pull, uint32_t drive, uint32_t alt) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
pwpr_unprotect();
_PXXPFS(port, bit) &= ~(PMR_MASK | ASEL_MASK | NCODR_MASK | PCR_MASK | PDR_MASK | DSCR1_MASK | DSCR_MASK);
switch (mode) {
case GPIO_MODE_INPUT:
if (pull == GPIO_PULLUP) {
_PXXPFS(port, bit) |= PCR_MASK; // set pullup
}
break;
case GPIO_MODE_OUTPUT_PP:
_PXXPFS(port, bit) |= PDR_MASK; // output
break;
case GPIO_MODE_OUTPUT_OD:
_PXXPFS(port, bit) |= (PDR_MASK | NCODR_MASK);
break;
case GPIO_MODE_AF_PP:
_PXXPFS(port, bit) |= (PMR_MASK | PDR_MASK);
break;
case GPIO_MODE_AF_OD:
_PXXPFS(port, bit) |= (PMR_MASK | PDR_MASK | NCODR_MASK);
break;
case GPIO_MODE_ANALOG:
_PXXPFS(port, bit) |= ASEL_MASK;
break;
}
switch (drive) {
case GPIO_HIGH_POWER:
_PXXPFS(port, bit) |= (DSCR1_MASK | DSCR_MASK);
break;
case GPIO_MID_FAST_POWER:
_PXXPFS(port, bit) |= DSCR1_MASK;
break;
case GPIO_MID_POWER:
_PXXPFS(port, bit) |= DSCR_MASK;
break;
case GPIO_LOW_POWER:
default:
/* Bits are already cleared */
break;
}
_PXXPFS(port, bit) &= ~(uint32_t)(0x1f000000);
if (alt != 0) {
_PXXPFS(port, bit) |= (alt << 24); // Must set PSEL when PMR is 0
_PXXPFS(port, bit) |= PMR_MASK;
}
pwpr_protect();
}
void ra_gpio_mode_output(uint32_t pin) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
pwpr_unprotect();
_PXXPFS(port, bit) &= ~(PMR_MASK | ASEL_MASK | PCR_MASK); // GPIO
_PXXPFS(port, bit) |= PDR_MASK; // output
pwpr_protect();
}
void ra_gpio_mode_input(uint32_t pin) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
pwpr_unprotect();
_PXXPFS(port, bit) &= ~(PMR_MASK | ASEL_MASK); // GPIO
_PXXPFS(port, bit) &= ~PDR_MASK; // input
pwpr_protect();
}
void ra_gpio_toggle(uint32_t pin) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
pwpr_unprotect();
_PXXPFS(port, bit) ^= 1;
pwpr_protect();
}
void ra_gpio_write(uint32_t pin, uint32_t value) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
pwpr_unprotect();
if (value != 0) {
_PXXPFS(port, bit) |= 1;
} else {
_PXXPFS(port, bit) &= ~(uint32_t)1;
}
pwpr_protect();
}
uint32_t ra_gpio_read(uint32_t pin) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
return ((_PXXPFS(port, bit) & PIDR_MASK) != 0) ? 1 : 0;
}
uint32_t ra_gpio_get_mode(uint32_t pin) {
uint8_t mode = 0;
uint32_t pfs = _PXXPFS(GPIO_PORT(pin), GPIO_BIT(pin));
if ((pfs & ASEL_MASK) != 0) {
mode = GPIO_MODE_ANALOG;
} else if ((pfs & PMR_MASK) != 0) {
if ((pfs & NCODR_MASK) != 0) {
mode = GPIO_MODE_AF_OD;
} else {
mode = GPIO_MODE_AF_PP;
}
} else if ((pfs & PDR_MASK) != 0) {
if ((pfs & NCODR_MASK) != 0) {
mode = GPIO_MODE_OUTPUT_OD;
} else {
mode = GPIO_MODE_OUTPUT_PP;
}
} else {
mode = GPIO_MODE_INPUT;
}
return mode;
}
uint32_t ra_gpio_get_pull(uint32_t pin) {
uint8_t pull = 0;
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
if ((_PXXPFS(port, bit) & PCR_MASK) != 0) {
pull = GPIO_PULLUP;
} else {
pull = GPIO_NOPULL;
}
return pull;
}
uint32_t ra_gpio_get_af(uint32_t pin) {
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
return (_PXXPFS(port, bit) & PMR_MASK) != 0;
}
uint32_t ra_gpio_get_drive(uint32_t pin) {
uint8_t drive = 0;
uint32_t port = GPIO_PORT(pin);
uint32_t bit = GPIO_BIT(pin);
switch (_PXXPFS(port, bit) & (DSCR1_MASK | DSCR_MASK)) {
case (DSCR1_MASK | DSCR_MASK):
drive = GPIO_HIGH_POWER;
break;
case DSCR1_MASK:
drive = GPIO_MID_FAST_POWER;
break;
case DSCR_MASK:
drive = GPIO_MID_POWER;
break;
case 0:
default:
drive = GPIO_LOW_POWER;
break;
}
return drive;
}