parameters.cpp

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/**
 * @file parameters.cpp
 *
 * @author Beat Kueng <beat-kueng@gmx.net>
 */

#include "parameters.h"

#include <px4_platform_common/log.h>
#include <px4_platform_common/px4_config.h>
#include <drivers/drv_adc.h>

namespace battery_status
{

void initialize_parameter_handles(ParameterHandles &parameter_handles)
{
    parameter_handles.battery_voltage_scaling = param_find("BAT_CNT_V_VOLT");
    parameter_handles.battery_current_scaling = param_find("BAT_CNT_V_CURR");
    parameter_handles.battery_current_offset = param_find("BAT_V_OFFS_CURR");
    parameter_handles.battery_v_div = param_find("BAT_V_DIV");
    parameter_handles.battery_a_per_v = param_find("BAT_A_PER_V");
    parameter_handles.battery_source = param_find("BAT_SOURCE");
    parameter_handles.battery_adc_channel = param_find("BAT_ADC_CHANNEL");
}

int update_parameters(const ParameterHandles &parameter_handles, Parameters &parameters)
{
    int ret = PX4_OK;

    const char *paramerr = "FAIL PARM LOAD";

    /* scaling of ADC ticks to battery voltage */
    if (param_get(parameter_handles.battery_voltage_scaling, &(parameters.battery_voltage_scaling)) != OK) {
        PX4_WARN("%s", paramerr);

    } else if (parameters.battery_voltage_scaling < 0.0f) {
        /* apply scaling according to defaults if set to default */
        parameters.battery_voltage_scaling = (BOARD_ADC_POS_REF_V_FOR_VOLTAGE_CHAN / px4_arch_adc_dn_fullcount());
        param_set_no_notification(parameter_handles.battery_voltage_scaling, &parameters.battery_voltage_scaling);
    }

    /* scaling of ADC ticks to battery current */
    if (param_get(parameter_handles.battery_current_scaling, &(parameters.battery_current_scaling)) != OK) {
        PX4_WARN("%s", paramerr);

    } else if (parameters.battery_current_scaling < 0.0f) {
        /* apply scaling according to defaults if set to default */
        parameters.battery_current_scaling = (BOARD_ADC_POS_REF_V_FOR_CURRENT_CHAN / px4_arch_adc_dn_fullcount());
        param_set_no_notification(parameter_handles.battery_current_scaling, &parameters.battery_current_scaling);
    }

    if (param_get(parameter_handles.battery_current_offset, &(parameters.battery_current_offset)) != OK) {
        PX4_WARN("%s", paramerr);

    }

    if (param_get(parameter_handles.battery_v_div, &(parameters.battery_v_div)) != OK) {
        PX4_WARN("%s", paramerr);
        parameters.battery_v_div = 0.0f;

    } else if (parameters.battery_v_div <= 0.0f) {
        /* apply scaling according to defaults if set to default */

        parameters.battery_v_div = BOARD_BATTERY1_V_DIV;
        param_set_no_notification(parameter_handles.battery_v_div, &parameters.battery_v_div);
    }

    if (param_get(parameter_handles.battery_a_per_v, &(parameters.battery_a_per_v)) != OK) {
        PX4_WARN("%s", paramerr);
        parameters.battery_a_per_v = 0.0f;

    } else if (parameters.battery_a_per_v <= 0.0f) {
        /* apply scaling according to defaults if set to default */

        parameters.battery_a_per_v = BOARD_BATTERY1_A_PER_V;
        param_set_no_notification(parameter_handles.battery_a_per_v, &parameters.battery_a_per_v);
    }

    param_get(parameter_handles.battery_source,      &(parameters.battery_source));
    param_get(parameter_handles.battery_adc_channel, &(parameters.battery_adc_channel));

    return ret;
}

} /* namespace battery_status */