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2026-05-24 19:56:38 +03:00
parent c03cfc23fb
commit 8d5af0b70c
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+#ifndef SERVO2350_DRIVERS_MULTIPLEXER_CD74HC4067_H_
+#define SERVO2350_DRIVERS_MULTIPLEXER_CD74HC4067_H_
+
+#include <stdint.h>
+
+#include <zephyr/device.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Select one of the 16 multiplexed channels.
+ *
+ * @param dev      CD74HC4067 device instance.
+ * @param channel  Channel number to route (0-15).
+ *
+ * @retval 0 If the channel was selected.
+ * @retval -EINVAL If the channel number is out of range.
+ * @retval -ENODEV If one of the selection GPIOs is not ready.
+ * @retval other Negative errno value from the GPIO driver.
+ */
+int cd74hc4067_select_channel(const struct device *dev, uint8_t channel);
+
+/**
+ * @brief Enable the multiplexer output (drives the /EN pin low).
+ *
+ * If the instance does not provide an enable GPIO, this call is a no-op.
+ *
+ * @param dev CD74HC4067 device instance.
+ *
+ * @retval 0 On success.
+ * @retval -ENODEV If the enable GPIO is not ready.
+ * @retval negative errno on GPIO failures.
+ */
+int cd74hc4067_enable(const struct device *dev);
+
+/**
+ * @brief Disable the multiplexer output (drives the /EN pin high).
+ *
+ * @param dev CD74HC4067 device instance.
+ *
+ * @retval 0 On success.
+ * @retval -ENOTSUP If the instance does not expose an enable GPIO.
+ * @retval -ENODEV If the enable GPIO is not ready.
+ * @retval negative errno on GPIO failures.
+ */
+int cd74hc4067_disable(const struct device *dev);
+
+/**
+ * @brief Return the last channel value written to the device.
+ *
+ * @param dev CD74HC4067 device instance.
+ *
+ * @return Channel number in the range [0, 15].
+ */
+uint8_t cd74hc4067_get_current_channel(const struct device *dev);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SERVO2350_DRIVERS_MULTIPLEXER_CD74HC4067_H_ */
+