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https://github.com/Sani7/remote-ui.git
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Add gpio class
This commit is contained in:
@@ -0,0 +1,176 @@
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#include "gpio.hpp"
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#include "spdlog/spdlog.h"
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#include <errno.h>
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#if __aarch64__
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#else
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struct gpiod_chip *gpiod_chip_open(const char *path){return NULL;}
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struct gpiod_line_settings *gpiod_line_settings_new(void){}
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int gpiod_line_settings_set_direction(struct gpiod_line_settings *settings,
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enum gpiod_line_direction direction){return 0;}
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int gpiod_line_settings_set_output_value(struct gpiod_line_settings *settings,
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enum gpiod_line_value value){return 0;}
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struct gpiod_line_config *gpiod_line_config_new(void){return NULL;}
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int gpiod_line_config_add_line_settings(struct gpiod_line_config *config,
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const unsigned int *offsets,
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size_t num_offsets,
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struct gpiod_line_settings *settings){return 0;}
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struct gpiod_request_config *gpiod_request_config_new(void){}
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void gpiod_request_config_set_consumer(struct gpiod_request_config *config,
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const char *consumer){}
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struct gpiod_line_request *
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gpiod_chip_request_lines(struct gpiod_chip *chip,
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struct gpiod_request_config *req_cfg,
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struct gpiod_line_config *line_cfg){return NULL;}
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int gpiod_line_request_set_value(struct gpiod_line_request *request,
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unsigned int offset,
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enum gpiod_line_value value){}
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enum gpiod_line_value
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gpiod_line_request_get_value(struct gpiod_line_request *request,
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unsigned int offset) {}
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void gpiod_request_config_free(struct gpiod_request_config *config){}
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void gpiod_line_config_free(struct gpiod_line_config *config){}
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void gpiod_line_settings_free(struct gpiod_line_settings *settings){}
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void gpiod_chip_close(struct gpiod_chip *chip){}
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#endif
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GPIO::GPIO(Direction dir, uint8_t gpio, bool state, QObject* parent)
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: QObject(parent), m_offset(gpio)
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{
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if (dir == Direction::Output)
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{
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m_request = request_output_line("/dev/gpiochip0", gpio, (enum gpiod_line_value)state, "Consumer");
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if (!m_request) {
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SPDLOG_ERROR("failed to request line: {}",
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strerror(errno));
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}
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return;
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}
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if (dir == Direction::Input)
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{
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m_request = request_input_line("/dev/gpiochip0", gpio, "get-line-value");
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if (!m_request) {
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fprintf(stderr, "failed to request line: %s\n",
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strerror(errno));
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}
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}
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}
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void GPIO::set_value(bool value)
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{
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gpiod_line_request_set_value(m_request, m_offset, (enum gpiod_line_value)value);
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}
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bool GPIO::value()
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{
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return (bool)gpiod_line_request_get_value(m_request, m_offset);
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}
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struct gpiod_line_request *
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GPIO::request_output_line(const char *chip_path, unsigned int offset,
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enum gpiod_line_value value, const char *consumer)
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{
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struct gpiod_request_config *req_cfg = NULL;
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struct gpiod_line_request *request = NULL;
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struct gpiod_line_settings *settings;
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struct gpiod_line_config *line_cfg;
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struct gpiod_chip *chip;
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int ret;
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chip = gpiod_chip_open(chip_path);
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if (!chip)
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return NULL;
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settings = gpiod_line_settings_new();
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if (!settings)
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goto close_chip;
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gpiod_line_settings_set_direction(settings,
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GPIOD_LINE_DIRECTION_OUTPUT);
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gpiod_line_settings_set_output_value(settings, value);
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line_cfg = gpiod_line_config_new();
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if (!line_cfg)
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goto free_settings;
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ret = gpiod_line_config_add_line_settings(line_cfg, &offset, 1,
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settings);
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if (ret)
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goto free_line_config;
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if (consumer) {
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req_cfg = gpiod_request_config_new();
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if (!req_cfg)
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goto free_line_config;
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gpiod_request_config_set_consumer(req_cfg, consumer);
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}
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request = gpiod_chip_request_lines(chip, req_cfg, line_cfg);
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gpiod_request_config_free(req_cfg);
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free_line_config:
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gpiod_line_config_free(line_cfg);
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free_settings:
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gpiod_line_settings_free(settings);
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close_chip:
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gpiod_chip_close(chip);
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return request;
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}
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struct gpiod_line_request *GPIO::request_input_line(const char *chip_path,
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unsigned int offset,
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const char *consumer)
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{
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struct gpiod_request_config *req_cfg = NULL;
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struct gpiod_line_request *request = NULL;
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struct gpiod_line_settings *settings;
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struct gpiod_line_config *line_cfg;
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struct gpiod_chip *chip;
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int ret;
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chip = gpiod_chip_open(chip_path);
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if (!chip)
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return NULL;
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settings = gpiod_line_settings_new();
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if (!settings)
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goto close_chip;
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gpiod_line_settings_set_direction(settings, GPIOD_LINE_DIRECTION_INPUT);
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line_cfg = gpiod_line_config_new();
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if (!line_cfg)
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goto free_settings;
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ret = gpiod_line_config_add_line_settings(line_cfg, &offset, 1,
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settings);
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if (ret)
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goto free_line_config;
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if (consumer) {
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req_cfg = gpiod_request_config_new();
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if (!req_cfg)
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goto free_line_config;
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gpiod_request_config_set_consumer(req_cfg, consumer);
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}
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request = gpiod_chip_request_lines(chip, req_cfg, line_cfg);
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gpiod_request_config_free(req_cfg);
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free_line_config:
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gpiod_line_config_free(line_cfg);
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free_settings:
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gpiod_line_settings_free(settings);
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close_chip:
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gpiod_chip_close(chip);
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return request;
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}
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@@ -0,0 +1,55 @@
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#ifndef GPIO_HPP
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#define GPIO_HPP
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#include <QObject>
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#ifdef __aarch64__
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#include <gpiod.h>
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#else
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struct gpiod_line_request{};
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struct gpiod_request_config{};
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struct gpiod_line_settings{};
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struct gpiod_line_config{};
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struct gpiod_chip{};
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enum gpiod_line_value {
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GPIOD_LINE_VALUE_ERROR = -1,
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/**< Returned to indicate an error when reading the value. */
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GPIOD_LINE_VALUE_INACTIVE = 0,
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/**< Line is logically inactive. */
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GPIOD_LINE_VALUE_ACTIVE = 1,
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/**< Line is logically active. */
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};
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enum gpiod_line_direction {
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GPIOD_LINE_DIRECTION_AS_IS = 1,
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/**< Request the line(s), but don't change direction. */
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GPIOD_LINE_DIRECTION_INPUT,
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/**< Direction is input - for reading the value of an externally driven
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* GPIO line. */
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GPIOD_LINE_DIRECTION_OUTPUT,
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/**< Direction is output - for driving the GPIO line. */
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};
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#endif
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class GPIO : public QObject {
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Q_OBJECT
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public:
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enum Direction {
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Input,
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Output
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};
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explicit GPIO(Direction dir, uint8_t gpio, bool state = false, QObject* parent = nullptr);
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void set_value(bool val);
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bool value();
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private:
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struct gpiod_line_request *
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request_output_line(const char *chip_path, unsigned int offset,
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enum gpiod_line_value value, const char *consumer);
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struct gpiod_line_request *request_input_line(const char *chip_path,
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unsigned int offset,
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const char *consumer);
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struct gpiod_line_request *m_request;
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unsigned int m_offset;
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};
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#endif // GPIO_HPP
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