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