AnalogAxisProcessing.cpp

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/*
 * AnalogAxisProcessing.cpp
 *
 *  Created on: Jun 29, 2022
 *      Author: Yannick
 */
 
#include "AnalogAxisProcessing.h"
#include "CommandHandler.h"
 
AnalogAxisProcessing::AnalogAxisProcessing(const uint32_t axisAmount,AnalogSource* analogSource,CommandHandler* cmdHandler,bool allowFilters,bool allowAutoscale,bool allowRawValues,bool allowManualScale) : axisAmount(axisAmount),analogSource(analogSource), modes({allowFilters,allowAutoscale,allowRawValues,allowManualScale}){
 
    if(allowAutoscale || allowManualScale){
        minMaxVals.resize(axisAmount); // We need min/max pairs if autoscaling or manual scaling is allowed
    }
 
    if(allowFilters){
        filters = std::vector<Biquad>(axisAmount); // Allocate filter
        // Activate command
        if(cmdHandler)
            cmdHandler->registerCommand("filter", AnalogAxisProcessing_commands::filter, "Enable lowpass filters",CMDFLAG_GET|CMDFLAG_SET);
 
    }else{
        conf.filtersEnabled = false;
    }
 
 
    if(allowAutoscale){
        if(cmdHandler)
            cmdHandler->registerCommand("autocal", AnalogAxisProcessing_commands::autoscale, "Autoranging",CMDFLAG_GET|CMDFLAG_SET);
    }else{
        conf.autorange = false;
    }
 
    if(analogSource)
        cmdHandler->registerCommand("values", AnalogAxisProcessing_commands::values, "Analog output values",CMDFLAG_GET);
 
    if(allowRawValues)
        cmdHandler->registerCommand("rawval", AnalogAxisProcessing_commands::rawvalues, "All raw values",CMDFLAG_GET);
 
    if(allowManualScale && cmdHandler){
        cmdHandler->registerCommand("min", AnalogAxisProcessing_commands::min, "Min value limit (adr=chan)",CMDFLAG_GETADR|CMDFLAG_SETADR);
        cmdHandler->registerCommand("max", AnalogAxisProcessing_commands::max, "Max value limit (adr=chan)",CMDFLAG_GETADR|CMDFLAG_SETADR);
        conf.raw = false;
    }
    setupFilters(); // Initialize filters
}
 
void registerCommands(CommandHandler* cmdhandler){
 
}
 
AnalogAxisProcessing::~AnalogAxisProcessing() {
 
}
 
 
void AnalogAxisProcessing::setupFilters(){
    for(Biquad& filter : filters){
        filter.setBiquad(BiquadType::lowpass, filterF, filterQ, 0.0);
    }
    filterSamples = 0;
}
 
AnalogProcessingConfig& AnalogAxisProcessing::getAnalogProcessingConfig(){
    return this->conf;
}
 
void AnalogAxisProcessing::setAnalogProcessingConfig(AnalogProcessingConfig conf){
    this->conf = conf;
}
 
void AnalogAxisProcessing::processAxes(std::vector<int32_t>& buf){
    if(modes.allowRawvalues){
        this->rawValues = buf;
    }
 
    for(uint32_t i = 0 ; i < std::min<uint32_t>(this->axisAmount , buf.size()) ; i++){
        // Modify values in vector directly
        int32_t val = buf[i];
        // Apply filter
        if(conf.filtersEnabled && i < filters.size()){
            val = filters[i].process(val);
            if(filterSamples <= waitFilterSamples){
                filterSamples++;
            }
        }
 
 
        // Only process if minMaxVals are available
        if(i < minMaxVals.size()){
 
            // If filter and autoranging enabled wait for enough samples to update min/max
            if(conf.autorange && (filterSamples > waitFilterSamples || !conf.filtersEnabled)){
                minMaxVals[i].max = std::max(minMaxVals[i].max,val);
                minMaxVals[i].min = std::min(minMaxVals[i].min,val);
            }
 
            int32_t range = (minMaxVals[i].max - minMaxVals[i].min);
            if(range > 1 && range <= 0xffff && !conf.raw){
                float scaler = ((float)0xffff / (float)range)*(autorangeScale);
                val *= scaler;
                val = val - ((scaler*(float)minMaxVals[i].min) + 0x7fff);
            }
        }
        val = clip(val,-0x7fff,0x7fff); // Clip if slightly out of range because of inaccuracy
        buf[i] = val; // Store in buffer
    }
 
}
 
 
CommandStatus AnalogAxisProcessing::command(const ParsedCommand& cmd,std::vector<CommandReply>& replies){
    switch(static_cast<AnalogAxisProcessing_commands>(cmd.cmdId))
    {
    case AnalogAxisProcessing_commands::values:
        if(cmd.type == CMDtype::get){
            std::vector<int32_t>* axes = this->analogSource->getAxes();
 
            for(int32_t val : *axes){
                replies.emplace_back(val);
            }
 
        }else{
            return CommandStatus::ERR;
        }
        break;
 
    case AnalogAxisProcessing_commands::rawvalues:
        if(cmd.type == CMDtype::get){
            for(int32_t val : this->rawValues){
                replies.emplace_back(val);
            }
 
        }else{
            return CommandStatus::ERR;
        }
        break;
 
    case AnalogAxisProcessing_commands::autoscale:
        if( (cmd.type == CMDtype::set && cmd.val != 0) || !modes.allowManualScale){
            // Reset autorange
            for(uint8_t i = 0 ; i<minMaxVals.size() ; i++){
                minMaxVals[i] = MinMaxPair(); // Reset minmax
            }
        }
        return CommandHandler::handleGetSet(cmd, replies, this->conf.autorange);
 
    case AnalogAxisProcessing_commands::filter:
        if(cmd.type == CMDtype::set)
            setupFilters(); // Reset filters
        return CommandHandler::handleGetSet(cmd, replies, this->conf.filtersEnabled);
 
    case AnalogAxisProcessing_commands::max:
        // Valid if address is in pin range and value is 16b int
        if(cmd.adr >= 0 && cmd.adr <= axisAmount && cmd.val >= -0x7fff && cmd.val <= 0x7fff){
            if(cmd.type == CMDtype::getat){
                replies.emplace_back(minMaxVals[cmd.adr].max);
                break;
            }else if(cmd.type == CMDtype::setat){
                minMaxVals[cmd.adr].max = cmd.val;
                break;
            }
        }
        return CommandStatus::ERR; // Invalid
 
    case AnalogAxisProcessing_commands::min:
        // Valid if address is in pin range and value is 16b int
        if(cmd.adr >= 0 && cmd.adr <= axisAmount && cmd.val >= -0x7fff && cmd.val <= 0x7fff){
            if(cmd.type == CMDtype::getat){
                replies.emplace_back(minMaxVals[cmd.adr].min);
                break;
            }else if(cmd.type == CMDtype::setat){
                minMaxVals[cmd.adr].min = cmd.val;
                break;
            }
        }
        return CommandStatus::ERR; // Invalid
 
    default:
    return CommandStatus::NOT_FOUND;
    }
    return CommandStatus::OK;
}
 
 
 
AnalogProcessingConfig AnalogAxisProcessing::decodeAnalogProcessingConfFromInt(uint16_t val){
    AnalogProcessingConfig aconf;
    aconf.autorange = (val) & 0x1;
    aconf.filtersEnabled = (val >> 1) & 0x1;
    return aconf;
}
 
uint16_t AnalogAxisProcessing::encodeAnalogProcessingConfToInt(AnalogProcessingConfig& conf){
    uint16_t val = 0;
    val |= (conf.autorange & 0x1);
    val |= (conf.filtersEnabled & 0x1) << 1;
    return val;
}