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-rw-r--r--src/gpio/gpio.c261
-rw-r--r--src/gpio/gpio_private.h44
-rw-r--r--src/gpio/meson.build10
-rw-r--r--src/meson.build4
4 files changed, 1 insertions, 318 deletions
diff --git a/src/gpio/gpio.c b/src/gpio/gpio.c
deleted file mode 100644
index 0507769..0000000
--- a/src/gpio/gpio.c
+++ /dev/null
@@ -1,261 +0,0 @@
-/*
- * The Rin Library – gpio module
- *
- * Copyright (C) 2016 Gediminas Jakutis
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1
- * of the License.
- *
- * 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "rin/gpio.h"
-#include "gpio_private.h"
-
-unsigned int rin_gpio_open(const unsigned int num, const enum rin_gpiotype type)
-{
- struct stat st;
- struct timespec grace = { 0, 1 * 1000 * 1000 }; /* 1 ms */
- char buf[48] = { 0 };
- int fd;
- unsigned int timeout;
-
- init();
-
- if (type == rin_gpio_closed || !rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_closed) {
- return 1;
- }
-
- fd = open("/sys/class/gpio/export", O_WRONLY | O_DSYNC);
- sprintf(buf, "%u", num);
- write(fd, buf, strlen(buf));
- close(fd);
- sprintf(buf, "/sys/class/gpio/gpio%u/direction", num);
- timeout = 500; /* 500 ms, if it takes longer, something ain't right. */
- while (stat(buf, &st)) {
- nanosleep(&grace, NULL);
- if (!(--timeout)) {
- return 1;
- }
- }
- fd = open(buf, O_WRONLY | O_DSYNC);
- if (type == rin_gpio_in) {
- write(fd, "in", 2);
- } else {
- write(fd, "out", 3);
- }
- close(fd);
- gpio[num].type = type;
- sprintf(buf, "/sys/class/gpio/gpio%u/value", num);
- if (type == rin_gpio_in) {
- gpio[num].fd = open(buf, O_RDONLY);
- } else {
- gpio[num].fd = open(buf, O_WRONLY);
- }
-
- return 0;
-}
-
-unsigned int rin_gpio_close(const unsigned int num)
-{
- char buf[32] = { 0 };
- struct stat st;
- int fd;
-
- init();
- sprintf(buf, "/sys/class/gpio/gpio%u", num);
- if (stat(buf, &st)) {
- return 0;
- }
- close(gpio[num].fd);
- gpio[num].fd = -1;
- fd = open("/sys/class/gpio/unexport", O_WRONLY);
- sprintf(buf, "%u", num);
- write(fd, buf, strlen(buf));
- close(fd);
- gpio[num].type = rin_gpio_closed;
- return 0;
-}
-
-unsigned int rin_gpio_setval(const unsigned int num, const unsigned int val)
-{
- char buf[8] = { 0 };
-
- init();
- if (!rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_out) {
- return 1;
- }
- sprintf(buf, "%u", val);
- lseek(gpio[num].fd, 0, SEEK_SET);
- write(gpio[num].fd, buf, strlen(buf));
- return 0;
-}
-
-unsigned int rin_gpio_readval(const unsigned int num, unsigned int * const val)
-{
- init();
-
- if (!rin_gpio_num_exists(num) || gpio[num].type != rin_gpio_in) {
- exit(EXIT_FAILURE);
- }
-
- lseek(gpio[num].fd, 0, SEEK_SET);
- read(gpio[num].fd, val, 1);
-
- if (*val >= '0') {
- *val -= '0';
- }
-
- return 0;
-}
-
-
-unsigned int rin_gpio_writesequence(const struct rin_gpio_dataset * const dataset)
-{
- unsigned char *data;
- size_t i;
-
- if (!dataset || !dataset->data) {
- return 1;
- }
- data = dataset->data;
- for (i = 0; i < dataset->len; ++i) {
- unsigned char a;
- unsigned char bit;
-
- a = data[i / CHAR_BIT];
- bit = !(!(a & (1 << (i % CHAR_BIT))));
- rin_gpio_setval(dataset->signalnum, bit);
- rin_gpio_pulse(dataset->clocknum, dataset->pulseduration);
- if (dataset->delay) {
- nanosleep(dataset->delay, NULL);
- }
- }
- return 0;
-}
-
-unsigned int rin_gpio_on(const unsigned int num)
-{
- return rin_gpio_setval(1, num);
-}
-
-unsigned int rin_gpio_off(const unsigned int num)
-{
- return rin_gpio_setval(0, num);
-}
-
-unsigned int rin_gpio_pulse(const unsigned int num, const struct timespec * const pulselen)
-{
- unsigned int ret;
-
- ret = rin_gpio_on(num);
- if (ret) {
- return ret;
- }
- if (pulselen) {
- nanosleep(pulselen, NULL);
- }
- ret = rin_gpio_off(num);
- return ret;
-}
-
-/*
- * right now is rpi V1 specific, should be rewritten when/if we support
- * other platforms.
- */
-unsigned int rin_gpio_num_exists(const unsigned int num)
-{
- switch (num) {
- case 2:
- case 3:
- case 4:
- case 7:
- case 8:
- case 9:
- case 10:
- case 11:
- case 14:
- case 15:
- case 17:
- case 18:
- case 22:
- case 23:
- case 24:
- case 25:
- return 1;
- default:
- return 0;
- }
-}
-
-/*
- * in case we ever support hardware other than the V1 Raspberry,
- * we need this to get the pin usable pin count
- */
-unsigned int rin_gpio_get_numcount(void)
-{
- return 16;
-}
-
-unsigned int rin_gpio_get_pincount(void)
-{
- return 26;
-}
-
-unsigned int rin_gpio_pin_to_num(const unsigned int pin)
-{
- static const unsigned int pinmap[] = { 0, /* nonexistent zeroth index */
- 0, 0, 2, 0,
- 3, 0, 4, 14,
- 0, 15, 17, 18,
- 27, 0, 22, 23,
- 0, 24, 10, 0,
- 9, 25, 11, 8, 7};
-
- if (pin <= rin_gpio_get_pincount()) {
- return pinmap[pin];
- } else {
- return 0;
- }
-}
-
-unsigned int rin_gpio_num_to_pin(const unsigned int num)
-{
- static const unsigned int nummap[] = { 0, /* zeroth */
- 0, 3, 5, 7,
- 0, 0, 26, 24,
- 21, 19, 23, 0,
- 0, 8, 10, 0,
- 11, 12, 0, 0,
- 0, 15, 16, 18, 22};
-
- if (num <= 26) {
- return nummap[num];
- } else {
- return 0;
- }
-}
-
-static void init(void)
-{
- size_t i;
- static unsigned int firstrun = 1;
-
- if (firstrun) {
- firstrun = 0;
- for (i = 0; i < gpio_count; ++i) {
- gpio[i].num = i;
- gpio[i].type = rin_gpio_closed;
- gpio[i].fd = -1;
- }
- }
-}
diff --git a/src/gpio/gpio_private.h b/src/gpio/gpio_private.h
deleted file mode 100644
index 4a22570..0000000
--- a/src/gpio/gpio_private.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * The Rin Library – gpio module
- *
- * Copyright (C) 2016 Gediminas Jakutis
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1
- * of the License.
- *
- * 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#ifndef GPIO_PRIVATE_H_INCLUDED
-#define GPIO_PRIVATE_H_INCLUDED
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <time.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-/* TODO: make this platform-dependent */
-#define gpio_count 32
-
-static struct gpio {
- unsigned int num;
- enum rin_gpiotype type;
- int fd;
-} gpio[gpio_count];
-
-static void init(void);
-
-#endif /* GPIO_PRIVATE_H_INCLUDED */
diff --git a/src/gpio/meson.build b/src/gpio/meson.build
deleted file mode 100644
index 82887cb..0000000
--- a/src/gpio/meson.build
+++ /dev/null
@@ -1,10 +0,0 @@
-if get_option('gpio')
- gpio_filenames = [
- 'gpio.c',
- 'gpio_private.h',
- ]
-else
- gpio_filenames = []
-endif
-
-gpio_sources = files(gpio_filenames)
diff --git a/src/meson.build b/src/meson.build
index 8bd83b7..108f4b8 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,7 +1,5 @@
subdir('float')
-subdir('gpio')
subdir('diagnostic')
subdir('time')
-sources = [float_sources, gpio_sources, diagnostic_sources, time_sources]
-
+sources = [float_sources, diagnostic_sources, time_sources]
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-22 03:14:02 +0000