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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | /* sensor_isl29035.c - driver for ISL29035 light sensor */ /* * Copyright (c) 2016 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <arch/cpu.h> #include <device.h> #include <i2c.h> #include <init.h> #include <nanokernel.h> #include <sensor.h> #include <zephyr.h> #include <misc/__assert.h> #include "sensor_isl29035.h" static int isl29035_sample_fetch(struct device *dev, enum sensor_channel chan) { struct isl29035_driver_data *drv_data = dev->driver_data; uint8_t msb, lsb; __ASSERT(chan == SENSOR_CHAN_ALL); if (i2c_reg_read_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_DATA_MSB_REG, &msb) < 0) { return -EIO; } if (i2c_reg_read_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_DATA_LSB_REG, &lsb) < 0) { return -EIO; } drv_data->data_sample = (msb << 8) + lsb; return 0; } static int isl29035_channel_get(struct device *dev, enum sensor_channel chan, struct sensor_value *val) { struct isl29035_driver_data *drv_data = dev->driver_data; uint64_t tmp; #if CONFIG_ISL29035_MODE_ALS /* val = sample_val * lux_range / (2 ^ adc_data_bits) */ tmp = (uint64_t)drv_data->data_sample * ISL29035_LUX_RANGE; val->type = SENSOR_VALUE_TYPE_INT_PLUS_MICRO; val->val1 = tmp >> ISL29035_ADC_DATA_BITS; tmp = (tmp & ISL29035_ADC_DATA_MASK) * 1000000; val->val2 = tmp >> ISL29035_ADC_DATA_BITS; #elif CONFIG_ISL29035_MODE_IR ARG_UNUSED(tmp); val->type = SENSOR_VALUE_TYPE_INT; val->val1 = drv_data->data_sample; #endif return 0; } static struct sensor_driver_api isl29035_api = { #if CONFIG_ISL29035_TRIGGER .attr_set = &isl29035_attr_set, .trigger_set = &isl29035_trigger_set, #endif .sample_fetch = &isl29035_sample_fetch, .channel_get = &isl29035_channel_get, }; static int isl29035_init(struct device *dev) { struct isl29035_driver_data *drv_data = dev->driver_data; drv_data->i2c = device_get_binding(CONFIG_ISL29035_I2C_MASTER_DEV_NAME); if (drv_data->i2c == NULL) { SYS_LOG_DBG("Failed to get I2C device."); return -EINVAL; } drv_data->data_sample = 0; /* clear blownout status bit */ if (i2c_reg_update_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_ID_REG, ISL29035_BOUT_MASK, 0) < 0) { SYS_LOG_DBG("Failed to clear blownout status bit."); return -EIO; } /* set command registers to set default attributes */ if (i2c_reg_write_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_COMMAND_I_REG, 0) < 0) { SYS_LOG_DBG("Failed to clear COMMAND-I."); return -EIO; } if (i2c_reg_write_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_COMMAND_II_REG, 0) < 0) { SYS_LOG_DBG("Failed to clear COMMAND-II."); return -EIO; } /* set operation mode */ if (i2c_reg_update_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_COMMAND_I_REG, ISL29035_OPMODE_MASK, ISL29035_ACTIVE_OPMODE_BITS) < 0) { SYS_LOG_DBG("Failed to set opmode."); return -EIO; } /* set lux range */ if (i2c_reg_update_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_COMMAND_II_REG, ISL29035_LUX_RANGE_MASK, ISL29035_LUX_RANGE_BITS) < 0) { SYS_LOG_DBG("Failed to set lux range."); return -EIO; } /* set ADC resolution */ if (i2c_reg_update_byte(drv_data->i2c, ISL29035_I2C_ADDRESS, ISL29035_COMMAND_II_REG, ISL29035_ADC_RES_MASK, ISL29035_ADC_RES_BITS) < 0) { SYS_LOG_DBG("Failed to set ADC resolution."); return -EIO; } #ifdef CONFIG_ISL29035_TRIGGER if (isl29035_init_interrupt(dev) < 0) { SYS_LOG_DBG("Failed to initialize interrupt."); return -EIO; } #endif dev->driver_api = &isl29035_api; return 0; } struct isl29035_driver_data isl29035_data; DEVICE_INIT(isl29035_dev, CONFIG_ISL29035_NAME, &isl29035_init, &isl29035_data, NULL, SECONDARY, CONFIG_ISL29035_INIT_PRIORITY); |