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drivers/adcxx1c: add clear alert function

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This commit is contained in:
Vincent Dupont 2019-04-16 17:00:28 +02:00
parent 82ac139107
commit 8526e68b70
2 changed files with 44 additions and 0 deletions
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26
drivers/adcxx1c/adcxx1c.c
View File

@ -168,3 +168,29 @@ int adcxx1c_set_alert_parameters(const adcxx1c_t *dev, int16_t low_limit,
return ADCXX1C_OK;
}
int adcxx1c_get_and_clear_alert(const adcxx1c_t *dev)
{
int status;
uint8_t alert;
i2c_acquire(DEV);
status = i2c_read_reg(DEV, ADDR, ADCXX1C_ALERT_STATUS_ADDR, &alert, 0);
if (status < 0) {
i2c_release(DEV);
DEBUG("[adcxx1c] get_and_clear_alert - error: unable to read reg (%d)\n", status);
return ADCXX1C_NOI2C;
}
status = i2c_write_reg(DEV, ADDR, ADCXX1C_ALERT_STATUS_ADDR, alert, 0);
if (status < 0) {
i2c_release(DEV);
DEBUG("[adcxx1c] get_and_clear_alert - error: unable to write reg (%d)\n", status);
return ADCXX1C_NOI2C;
}
i2c_release(DEV);
return alert;
}

18
drivers/include/adcxx1c.h
View File

@ -87,6 +87,14 @@ enum {
ADCXX1C_NODATA = -3 /**< no data available */
};
/**
* @brief Alert values
*/
enum {
ADCXX1C_ALERT_UNDER_RANGE = 1, /**< Measured voltage fell below Vlow */
ADCXX1C_ALERT_OVER_RANGE = 2, /**< Measured voltage exceeded Vhigh */
};
/**
* @brief ADCxx1C params
*/
@ -159,6 +167,16 @@ int adcxx1c_enable_alert(adcxx1c_t *dev, adcxx1c_cb_t cb, void *arg);
int adcxx1c_set_alert_parameters(const adcxx1c_t *dev, int16_t low_limit,
int16_t high_limit, int16_t hysteresis);
/**
* @brief Get alert source and clear it
*
* @param[in,out] dev device descriptor
*
* @return a combination of ADCXX1C_ALERT_OVER_RANGE and ADCXX1C_ALERT_UNDER_RANGE on success
* @return negative error code on error
*/
int adcxx1c_get_and_clear_alert(const adcxx1c_t *dev);
#ifdef __cplusplus
}
#endif