133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
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/*
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* Copyright (c) 2020 Peter Johanson
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*
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* SPDX-License-Identifier: MIT
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*/
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#define DT_DRV_COMPAT alps_ec11
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#include <device.h>
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#include <drivers/gpio.h>
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#include <sys/util.h>
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#include <kernel.h>
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#include <drivers/sensor.h>
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#include <sys/__assert.h>
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#include <logging/log.h>
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#include "ec11.h"
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LOG_MODULE_REGISTER(EC11, CONFIG_SENSOR_LOG_LEVEL);
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static int ec11_sample_fetch(struct device *dev, enum sensor_channel chan)
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{
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struct ec11_data *drv_data = dev->driver_data;
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const struct ec11_config *drv_cfg = dev->config_info;
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u8_t val;
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u8_t delta;
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__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_ROTATION);
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val = (gpio_pin_get(drv_data->a, drv_cfg->a_pin) << 1) | gpio_pin_get(drv_data->b, drv_cfg->b_pin);
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LOG_DBG("prev: %d, new: %d", drv_data->ab_state, val);
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switch(val | (drv_data->ab_state << 2)) {
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case 0b0001: case 0b0111: case 0b1110:
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LOG_DBG("+1");
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delta = 1;
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break;
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default:
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LOG_DBG("FIGURE IT OUT!");
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break;
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}
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LOG_DBG("Delta: %d", delta);
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// if (ec11_reg_read(drv_data, EC11_REG_TOBJ, &val) < 0) {
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// return -EIO;
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// }
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// if (val & EC11_DATA_INVALID_BIT) {
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// return -EIO;
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// }
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// drv_data->sample = arithmetic_shift_right((s16_t)val, 2);
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return 0;
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}
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static int ec11_channel_get(struct device *dev,
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enum sensor_channel chan,
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struct sensor_value *val)
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{
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struct ec11_data *drv_data = dev->driver_data;
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// s32_t uval;
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// if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
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// return -ENOTSUP;
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// }
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// uval = (s32_t)drv_data->sample * EC11_TEMP_SCALE;
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// val->val1 = uval / 1000000;
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// val->val2 = uval % 1000000;
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return 0;
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}
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static const struct sensor_driver_api ec11_driver_api = {
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#ifdef CONFIG_EC11_TRIGGER
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.trigger_set = ec11_trigger_set,
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#endif
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.sample_fetch = ec11_sample_fetch,
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.channel_get = ec11_channel_get,
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};
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int ec11_init(struct device *dev)
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{
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struct ec11_data *drv_data = dev->driver_data;
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const struct ec11_config *drv_cfg = dev->config_info;
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LOG_DBG("resolution %d", drv_cfg->resolution);
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drv_data->a = device_get_binding(drv_cfg->a_label);
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if (drv_data->a == NULL) {
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LOG_ERR("Failed to get pointer to A GPIO device");
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return -EINVAL;
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}
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drv_data->b = device_get_binding(drv_cfg->b_label);
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if (drv_data->b == NULL) {
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LOG_ERR("Failed to get pointer to B GPIO device");
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return -EINVAL;
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}
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#ifdef CONFIG_EC11_TRIGGER
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if (ec11_init_interrupt(dev) < 0) {
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LOG_DBG("Failed to initialize interrupt!");
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return -EIO;
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}
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#endif
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return 0;
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}
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struct ec11_data ec11_data;
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const struct ec11_config ec11_cfg = {
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.a_label = DT_INST_GPIO_LABEL(0, a_gpios),
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.a_pin = DT_INST_GPIO_PIN(0, a_gpios),
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.a_flags = DT_INST_GPIO_FLAGS(0, a_gpios),
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.b_label = DT_INST_GPIO_LABEL(0, b_gpios),
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.b_pin = DT_INST_GPIO_PIN(0, b_gpios),
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.b_flags = DT_INST_GPIO_FLAGS(0, b_gpios),
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COND_CODE_0(DT_INST_NODE_HAS_PROP(0, resolution), (1), (DT_INST_PROP(0, resolution))),
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};
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DEVICE_AND_API_INIT(ec11, DT_INST_LABEL(0), ec11_init,
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&ec11_data,
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&ec11_cfg, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY,
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&ec11_driver_api);
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