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isl29125: added interrupt configuration register

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martinheusmann 2016-11-14 13:39:21 +01:00 committed by Cenk Gündoğan
parent 9a3589dcfe
commit 9d199d5d09
2 changed files with 135 additions and 2 deletions
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61
drivers/include/isl29125.h
View File

@ -1,5 +1,6 @@
/*
* Copyright 2015 Ludwig Knüpfer
* Copyright 2017 HAW Hamburg
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
@ -40,6 +41,8 @@
* @brief Device driver interface for the ISL29125 RGB light sensor
*
* @author Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de
* @author Martin Heusmann <martin.heusmann@haw-hamburg.de>
* @author Cenk Gündoğan <mail-github@cgundogan.de>
*/
#ifndef ISL29125_H
@ -106,6 +109,34 @@ typedef struct {
isl29125_resolution_t res; /**< sensor resolution */
} isl29125_t;
/**
* @brief Configuration-3 Register 0x03 B1:0
*/
typedef enum {
ISL29125_INTERRUPT_STATUS_NONE = 0x00, /**< No interrupt */
ISL29125_INTERRUPT_STATUS_GREEN = 0x01, /**< GREEN interrupt */
ISL29125_INTERRUPT_STATUS_RED = 0x02, /**< RED interrupt */
ISL29125_INTERRUPT_STATUS_BLUE = 0x03 /**< BLUE interrupt */
} isl29125_interrupt_status_t;
/**
* @brief Configuration-3 Register 0x03 B3:2
*/
typedef enum {
ISL29125_INTERRUPT_PERSIST_1 = (0x00 << 2), /**< Int. Persist: Number of integration cycle 1 */
ISL29125_INTERRUPT_PERSIST_2 = (0x01 << 2), /**< Int. Persist: Number of integration cycle 2 */
ISL29125_INTERRUPT_PERSIST_4 = (0x02 << 2), /**< Int. Persist: Number of integration cycle 4 */
ISL29125_INTERRUPT_PERSIST_8 = (0x03 << 2) /**< Int. Persist: Number of integration cycle 8 */
} isl29125_interrupt_persist_t;
/**
* @brief Configuration-3 Register 0x03 B4
*/
typedef enum {
ISL29125_INTERRUPT_CONV_DIS = (0x0 << 4), /**< RGB Conversion done to ~INT Control disable */
ISL29125_INTERRUPT_CONV_EN = (0x1 << 4), /**< RGB Conversion done to ~INT Control enable */
} isl29125_interrupt_conven_t;
/**
* @brief initialize a new ISL29125 device
*
@ -123,6 +154,27 @@ int isl29125_init(isl29125_t *dev, i2c_t i2c, gpio_t gpio,
isl29125_mode_t mode, isl29125_range_t range,
isl29125_resolution_t resolution);
/**
* @brief initialize interrupts
*
* @param[in] dev device descriptor of an ISL29125 device
* @param[in] interrupt_status Interrupt status
* @param[in] interrupt_persist Interrupt persistency
* @param[in] interrupt_conven RGB conversion done to interrupt control, enable
* @param[in] lower_threshold Lower interrupt threshold
* @param[in] higher_threshold Higher interrupt threshold
* @param[in] cb Callback function on interrupts
* @param[in] arg Argument passed to the callback function
*
* @return 0 on success
* @return -1 on error
*/
int isl29125_init_int(isl29125_t *dev, isl29125_interrupt_status_t interrupt_status,
isl29125_interrupt_persist_t interrupt_persist,
isl29125_interrupt_conven_t interrupt_conven,
uint16_t lower_threshold, uint16_t higher_threshold,
gpio_cb_t cb, void *arg);
/**
* @brief read RGB values from device
*
@ -147,6 +199,15 @@ void isl29125_read_rgb_color(isl29125_t *dev, color_rgb_t *dest);
*/
void isl29125_set_mode(isl29125_t *dev, isl29125_mode_t mode);
/**
* @brief read isl29125 interrupt status
*
* @param[in] dev device descriptor of an ISL29125 device
*
* @return interrupt status
*/
int isl29125_read_irq_status(isl29125_t *dev);
#ifdef __cplusplus
}
#endif

76
drivers/isl29125/isl29125.c
View File

@ -1,5 +1,6 @@
/*
* Copyright 2015 Ludwig Knüpfer
* Copyright 2017 HAW Hamburg
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
@ -14,6 +15,8 @@
* @brief Device driver implementation for the ISL29125 RGB light sensor
*
* @author Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
* @author Martin Heusmann <martin.heusmann@haw-hamburg.de>
* @author Cenk Gündoğan <mail-github@cgundogan.de>
*
* @}
*/
@ -54,8 +57,6 @@ int isl29125_init(isl29125_t *dev, i2c_t i2c, gpio_t gpio,
/* TODO: implement configuration 2: infrared compensation configuration */
/* TODO: implement configuration 3: interrupt mode configuration */
/* acquire exclusive access to the bus */
DEBUG("isl29125_init: i2c_acquire\n");
(void) i2c_acquire(dev->i2c);
@ -92,6 +93,61 @@ int isl29125_init(isl29125_t *dev, i2c_t i2c, gpio_t gpio,
return 0;
}
int isl29125_init_int(isl29125_t *dev, isl29125_interrupt_status_t interrupt_status,
isl29125_interrupt_persist_t interrupt_persist,
isl29125_interrupt_conven_t interrupt_conven,
uint16_t lower_threshold, uint16_t higher_threshold,
gpio_cb_t cb, void *arg)
{
/* configuration 3: interrupt mode configuration */
uint8_t conf3 = 0x00;
conf3 |= interrupt_status;
conf3 |= interrupt_persist;
conf3 |= interrupt_conven;
/* Lower and higher interrupt threshold registers. */
uint8_t lthlb = 0x00;
uint8_t lthhb = 0x00;
uint8_t hthlb = 0x00;
uint8_t hthhb = 0x00;
uint16_t max_range = 10000;
if (dev->range == 0x00) {
max_range = 375;
}
if ((higher_threshold <= max_range) && (lower_threshold < higher_threshold)) {
lower_threshold *= (uint16_t) (65535 / max_range);
lthlb = (uint8_t)(lower_threshold & 0xff);
lthhb = (uint8_t)(lower_threshold >> 8);
higher_threshold *= (uint16_t) (65535 / max_range);
hthlb = (uint8_t)(higher_threshold & 0xff);
hthhb = (uint8_t)(higher_threshold >> 8);
}
DEBUG("isl29125_init: i2c_write_reg(ISL29125_REG_CONF3)\n");
(void) i2c_write_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_CONF3, conf3);
DEBUG("isl29125_init: i2c_write_reg(ISL29125_REG_LTHLB)\n");
(void) i2c_write_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_LTHLB, lthlb);
DEBUG("isl29125_init: i2c_write_reg(ISL29125_REG_LTHHB)\n");
(void) i2c_write_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_LTHHB, lthhb);
DEBUG("isl29125_init: i2c_write_reg(ISL29125_REG_HTHLB)\n");
(void) i2c_write_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_HTHLB, hthlb);
DEBUG("isl29125_init: i2c_write_reg(ISL29125_REG_HTHHB)\n");
(void) i2c_write_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_HTHHB, hthhb);
if (gpio_init_int(dev->gpio, GPIO_IN, GPIO_FALLING, cb, arg) < 0) {
DEBUG("error: gpio_init_int failed\n");
return -1;
}
return 0;
}
void isl29125_read_rgb_lux(isl29125_t *dev, isl29125_rgb_t *dest)
{
/* acquire exclusive access to the bus */
@ -153,3 +209,19 @@ void isl29125_set_mode(isl29125_t *dev, isl29125_mode_t mode)
(void) i2c_release(dev->i2c);
}
int isl29125_read_irq_status(isl29125_t *dev)
{
/* acquire exclusive access to the bus */
(void) i2c_acquire(dev->i2c);
/* read status register */
uint8_t irq_status;
(void) i2c_read_reg(dev->i2c, ISL29125_I2C_ADDRESS, ISL29125_REG_STATUS, &irq_status);
/* release the I2C bus */
(void) i2c_release(dev->i2c);
/* return bit 0 (RGBTHF)*/
return (irq_status & 0x01);
}