b03baa4687
- add second pcb board_control, currently copy of previous board - not enough pins -> board_control handle ui send motorcommands via uart board_motorctl handle motors
331 lines
11 KiB
C++
331 lines
11 KiB
C++
#include "motorctl.hpp"
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//tag for logging
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static const char * TAG = "motor-control";
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//=============================
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//======== constructor ========
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//=============================
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//constructor, simultaniously initialize instance of motor driver 'motor' and current sensor 'cSensor' with provided config (see below lines after ':')
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controlledMotor::controlledMotor(single100a_config_t config_driver, motorctl_config_t config_control):
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motor(config_driver),
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cSensor(config_control.currentSensor_adc, config_control.currentSensor_ratedCurrent) {
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//copy parameters for controlling the motor
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config = config_control;
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//copy configured default fading durations to actually used variables
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msFadeAccel = config.msFadeAccel;
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msFadeDecel = config.msFadeDecel;
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init();
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//TODO: add currentsensor object here
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//currentSensor cSensor(config.currentSensor_adc, config.currentSensor_ratedCurrent);
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}
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//============================
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//========== init ============
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//============================
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void controlledMotor::init(){
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commandQueue = xQueueCreate( 1, sizeof( struct motorCommand_t ) );
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//cSensor.calibrateZeroAmpere(); //currently done in currentsensor constructor TODO do this regularly e.g. in idle?
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}
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//----------------
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//----- fade -----
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//----------------
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//local function that fades a variable
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//- increments a variable (pointer) by given value
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//- sets to target if already closer than increment
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//TODO this needs testing
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void fade(float * dutyNow, float dutyTarget, float dutyIncrement){
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float dutyDelta = dutyTarget - *dutyNow;
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if ( fabs(dutyDelta) > fabs(dutyIncrement) ) { //check if already close to target
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*dutyNow = *dutyNow + dutyIncrement;
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}
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//already closer to target than increment
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else {
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*dutyNow = dutyTarget;
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}
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}
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//----------------------------
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//----- getStateFromDuty -----
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//----------------------------
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//local function that determines motor the direction from duty range -100 to 100
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motorstate_t getStateFromDuty(float duty){
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if(duty > 0) return motorstate_t::FWD;
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if (duty < 0) return motorstate_t::REV;
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return motorstate_t::IDLE;
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}
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//==============================
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//=========== handle ===========
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//==============================
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//function that controls the motor driver and handles fading/ramp, current limit and deadtime
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void controlledMotor::handle(){
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//TODO: History: skip fading when motor was running fast recently / alternatively add rot-speed sensor
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//--- receive commands from queue ---
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if( xQueueReceive( commandQueue, &commandReceive, ( TickType_t ) 0 ) )
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{
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ESP_LOGD(TAG, "Read command from queue: state=%s, duty=%.2f", motorstateStr[(int)commandReceive.state], commandReceive.duty);
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state = commandReceive.state;
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dutyTarget = commandReceive.duty;
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//--- convert duty ---
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//define target duty (-100 to 100) from provided duty and motorstate
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//this value is more suitable for the fading algorithm
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switch(commandReceive.state){
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case motorstate_t::BRAKE:
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//update state
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state = motorstate_t::BRAKE;
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dutyTarget = 0;
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break;
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case motorstate_t::IDLE:
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dutyTarget = 0;
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break;
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case motorstate_t::FWD:
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dutyTarget = fabs(commandReceive.duty);
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break;
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case motorstate_t::REV:
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dutyTarget = - fabs(commandReceive.duty);
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break;
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}
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}
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//--- calculate increment ---
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//calculate increment for fading UP with passed time since last run and configured fade time
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int64_t usPassed = esp_timer_get_time() - timestampLastRunUs;
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if (msFadeAccel > 0){
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dutyIncrementAccel = ( usPassed / ((float)msFadeAccel * 1000) ) * 100; //TODO define maximum increment - first run after startup (or long) pause can cause a very large increment
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} else {
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dutyIncrementAccel = 100;
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}
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//calculate increment for fading DOWN with passed time since last run and configured fade time
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if (msFadeDecel > 0){
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dutyIncrementDecel = ( usPassed / ((float)msFadeDecel * 1000) ) * 100;
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} else {
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dutyIncrementDecel = 100;
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}
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//--- BRAKE ---
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//brake immediately, update state, duty and exit this cycle of handle function
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if (state == motorstate_t::BRAKE){
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motor.set(motorstate_t::BRAKE, 0);
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dutyNow = 0;
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return; //no need to run the fade algorithm
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}
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//--- calculate difference ---
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dutyDelta = dutyTarget - dutyNow;
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//positive: need to increase by that value
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//negative: need to decrease
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//----- FADING -----
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//fade duty to target (up and down)
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//TODO: this needs optimization (can be more clear and/or simpler)
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if (dutyDelta > 0) { //difference positive -> increasing duty (-100 -> 100)
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if (dutyNow < 0) { //reverse, decelerating
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fade(&dutyNow, dutyTarget, dutyIncrementDecel);
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}
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else if (dutyNow >= 0) { //forward, accelerating
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fade(&dutyNow, dutyTarget, dutyIncrementAccel);
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}
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}
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else if (dutyDelta < 0) { //difference negative -> decreasing duty (100 -> -100)
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if (dutyNow <= 0) { //reverse, accelerating
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fade(&dutyNow, dutyTarget, - dutyIncrementAccel);
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}
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else if (dutyNow > 0) { //forward, decelerating
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fade(&dutyNow, dutyTarget, - dutyIncrementDecel);
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}
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}
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//----- CURRENT LIMIT -----
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if ((config.currentLimitEnabled) && (dutyDelta != 0)){
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currentNow = cSensor.read();
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if (fabs(currentNow) > config.currentMax){
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float dutyOld = dutyNow;
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//adaptive decrement:
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//Note current exceeded twice -> twice as much decrement: TODO: decrement calc needs finetuning, currently random values
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dutyIncrementDecel = (currentNow/config.currentMax) * ( usPassed / ((float)msFadeDecel * 1500) ) * 100;
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float currentLimitDecrement = ( (float)usPassed / ((float)1000 * 1000) ) * 100; //1000ms from 100 to 0
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if (dutyNow < -currentLimitDecrement) {
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dutyNow += currentLimitDecrement;
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} else if (dutyNow > currentLimitDecrement) {
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dutyNow -= currentLimitDecrement;
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}
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ESP_LOGW(TAG, "current limit exceeded! now=%.3fA max=%.1fA => decreased duty from %.3f to %.3f", currentNow, config.currentMax, dutyOld, dutyNow);
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}
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}
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//--- define new motorstate --- (-100 to 100 => direction)
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state=getStateFromDuty(dutyNow);
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//--- DEAD TIME ----
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//ensure minimum idle time between direction change to prevent driver overload
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//FWD -> IDLE -> FWD continue without waiting
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//FWD -> IDLE -> REV wait for dead-time in IDLE
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//TODO check when changed only?
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if ( //not enough time between last direction state
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( state == motorstate_t::FWD && (esp_log_timestamp() - timestampsModeLastActive[(int)motorstate_t::REV] < config.deadTimeMs))
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|| (state == motorstate_t::REV && (esp_log_timestamp() - timestampsModeLastActive[(int)motorstate_t::FWD] < config.deadTimeMs))
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){
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ESP_LOGD(TAG, "waiting dead-time... dir change %s -> %s", motorstateStr[(int)statePrev], motorstateStr[(int)state]);
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if (!deadTimeWaiting){ //log start
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deadTimeWaiting = true;
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ESP_LOGW(TAG, "starting dead-time... %s -> %s", motorstateStr[(int)statePrev], motorstateStr[(int)state]);
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}
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//force IDLE state during wait
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state = motorstate_t::IDLE;
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dutyNow = 0;
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} else {
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if (deadTimeWaiting){ //log end
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deadTimeWaiting = false;
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ESP_LOGW(TAG, "dead-time ended - continue with %s", motorstateStr[(int)state]);
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}
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ESP_LOGV(TAG, "deadtime: no change below deadtime detected... dir=%s, duty=%.1f", motorstateStr[(int)state], dutyNow);
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}
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//--- save current actual motorstate and timestamp ---
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//needed for deadtime
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timestampsModeLastActive[(int)getStateFromDuty(dutyNow)] = esp_log_timestamp();
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//(-100 to 100 => direction)
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statePrev = getStateFromDuty(dutyNow);
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//--- apply new target to motor ---
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motor.set(state, fabs(dutyNow));
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//note: BRAKE state is handled earlier
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//--- update timestamp ---
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timestampLastRunUs = esp_timer_get_time(); //update timestamp last run with current timestamp in microseconds
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}
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//===============================
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//========== setTarget ==========
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//===============================
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//function to set the target mode and duty of a motor
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//puts the provided command in a queue for the handle function running in another task
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void controlledMotor::setTarget(motorstate_t state_f, float duty_f){
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commandSend = {
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.state = state_f,
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.duty = duty_f
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};
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ESP_LOGD(TAG, "Inserted command to queue: state=%s, duty=%.2f", motorstateStr[(int)commandSend.state], commandSend.duty);
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//send command to queue (overwrite if an old command is still in the queue and not processed)
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xQueueOverwrite( commandQueue, ( void * )&commandSend);
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//xQueueSend( commandQueue, ( void * )&commandSend, ( TickType_t ) 0 );
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}
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//===============================
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//========== getStatus ==========
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//===============================
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//function which returns the current status of the motor in a motorCommand_t struct
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motorCommand_t controlledMotor::getStatus(){
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motorCommand_t status = {
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.state = state,
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.duty = dutyNow
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};
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//TODO: mutex
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return status;
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};
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//===============================
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//=========== setFade ===========
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//===============================
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//function for editing or enabling the fading/ramp of the motor control
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//set/update fading duration/amount
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void controlledMotor::setFade(fadeType_t fadeType, uint32_t msFadeNew){
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//TODO: mutex for msFade variable also used in handle function
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switch(fadeType){
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case fadeType_t::ACCEL:
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msFadeAccel = msFadeNew;
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break;
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case fadeType_t::DECEL:
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msFadeDecel = msFadeNew;
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break;
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}
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}
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//enable (set to default value) or disable fading
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void controlledMotor::setFade(fadeType_t fadeType, bool enabled){
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uint32_t msFadeNew = 0; //define new fade time as default disabled
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if(enabled){ //enable
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//set to default/configured value
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switch(fadeType){
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case fadeType_t::ACCEL:
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msFadeNew = config.msFadeAccel;
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break;
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case fadeType_t::DECEL:
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msFadeNew = config.msFadeDecel;
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break;
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}
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}
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//apply new Fade value
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setFade(fadeType, msFadeNew);
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}
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//==================================
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//=========== toggleFade ===========
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//==================================
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//toggle fading between OFF and default value
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bool controlledMotor::toggleFade(fadeType_t fadeType){
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uint32_t msFadeNew = 0;
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bool enabled = false;
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switch(fadeType){
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case fadeType_t::ACCEL:
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if (msFadeAccel == 0){
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msFadeNew = config.msFadeAccel;
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enabled = true;
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} else {
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msFadeNew = 0;
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}
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break;
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case fadeType_t::DECEL:
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if (msFadeDecel == 0){
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msFadeNew = config.msFadeAccel;
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enabled = true;
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} else {
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msFadeNew = 0;
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}
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break;
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}
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//apply new Fade value
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setFade(fadeType, msFadeNew);
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//return new state (fading enabled/disabled)
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return enabled;
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}
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