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86 lines
2.3 KiB
86 lines
2.3 KiB
/* |
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* Copyright (c), 2023 Basalte bv |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#ifndef ZEPHYR_DRIVERS_I2C_I2C_SC18IM704_H_ |
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#define ZEPHYR_DRIVERS_I2C_I2C_SC18IM704_H_ |
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#include <stdint.h> |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define SC18IM704_CMD_STOP 0x50 |
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#define SC18IM704_CMD_I2C_START 0x53 |
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#define SC18IM704_CMD_READ_REG 0x52 |
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#define SC18IM704_CMD_WRITE_REG 0x57 |
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#define SC18IM704_CMD_READ_GPIO 0x49 |
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#define SC18IM704_CMD_WRITE_GPIO 0x4f |
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#define SC18IM704_CMD_POWER_DOWN 0x5a |
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#define SC18IM704_REG_BRG0 0x00 |
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#define SC18IM704_REG_BRG1 0x01 |
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#define SC18IM704_REG_GPIO_CONF1 0x02 |
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#define SC18IM704_REG_GPIO_CONF2 0x03 |
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#define SC18IM704_REG_GPIO_STATE 0x04 |
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#define SC18IM704_REG_I2C_ADDR 0x06 |
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#define SC18IM704_REG_I2C_CLK_L 0x07 |
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#define SC18IM704_REG_I2C_CLK_H 0x08 |
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#define SC18IM704_REG_I2C_TIMEOUT 0x09 |
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#define SC18IM704_REG_I2C_STAT 0x0a |
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#define SC18IM704_I2C_STAT_OK 0xf0 |
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#define SC18IM704_I2C_STAT_NACK_ADDR 0xf1 |
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#define SC18IM704_I2C_STAT_NACK_DATA 0xf2 |
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#define SC18IM704_I2C_STAT_TIMEOUT 0xf8 |
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/** |
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* @brief Claim the SC18IM704 device. |
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* |
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* @warning After calling this routine, the device cannot be used by any other |
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* thread until the sc18im704_release routine is called. |
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* |
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* @param dev SC18IM704 device. |
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* |
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* @retval 0 Device claimed. |
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* @retval -EBUSY The device could not be claimed. |
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*/ |
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int sc18im704_claim(const struct device *dev); |
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/** |
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* @brief Release the SC18IM704 device claim. |
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* |
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* @warning This routine must only be used after a sc18im704_claim. |
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* |
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* @param dev SC18IM704 device. |
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* |
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* @retval 0 Device claim to release. |
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* @retval -EPERM The current thread hasn't claimed the device. |
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* @retval -EINVAL The device has no active claims. |
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*/ |
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int sc18im704_release(const struct device *dev); |
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/** |
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* @brief Exchange data with the SC18IM704 device. |
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* |
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* @param dev SC18IM704 device. |
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* @param tx_data The data buffer to write from. |
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* @param tx_len The length of the tx_data buffer. |
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* @param rx_data The data buffer to read to. |
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* @param rx_len The length of the rx_data buffer. |
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* |
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* @retval 0 If successful. |
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* @retval -EAGAIN The device did not respond in time (1 second timeout). |
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*/ |
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int sc18im704_transfer(const struct device *dev, |
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const uint8_t *tx_data, uint8_t tx_len, |
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uint8_t *rx_data, uint8_t rx_len); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* ZEPHYR_DRIVERS_I2C_I2C_SC18IM704_H_ */
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