cl step dev

2020-06_ucbus-stepper-melted/eagle.epf

@@ -9,17 +9,17 @@ AutoSaveProject=1
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2020-06_ucbus-stepper-module/eagle.epf

@@ -352,15 +352,15 @@ UsedLibraryUrn="urn:adsk.eagle:library:146"
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firmware/cl-step-controller/src/drivers/enc_as5047.cpp

@@ -75,22 +75,20 @@ void ENC_AS5047::init(void){
     // AS5047 datasheet says CPOL = 1, CPHA = 0, msb first, and parity checks 
     // bit: func 
     // 15: parity, 14: 0/read, 1/write, 13:0 address to read or write 
-    ENC_SER_SPI.CTRLA.reg = //SERCOM_SPI_CTRLA_CPOL | // CPOL = 1
-                            SERCOM_SPI_CTRLA_CPHA | // ?
+    ENC_SER_SPI.CTRLA.reg = SERCOM_SPI_CTRLA_CPOL | // CPOL = 1
+                            //SERCOM_SPI_CTRLA_CPHA | // ?
                             SERCOM_SPI_CTRLA_DIPO(3) | // pad 3 is data input 
                             SERCOM_SPI_CTRLA_DOPO(0) | // pad 0 is data output, 1 is clk  
                             SERCOM_SPI_CTRLA_MODE(3);  // mode 3: head operation 
     ENC_SER_SPI.CTRLB.reg = SERCOM_SPI_CTRLB_RXEN; // enable rx, char size is 8, etc 
-    ENC_SER_SPI.BAUD.reg = SERCOM_SPI_BAUD_BAUD(2); // f_baud = f_ref / ((2*BAUD) + 1) 
+    ENC_SER_SPI.BAUD.reg = SERCOM_SPI_BAUD_BAUD(14); // f_baud = f_ref / ((2*BAUD) + 1) 
                                                     // BAUD = 2 ~= 8MHz / 124ns clock period 
                                                     // BAUD = 3 ~= 6MHz / 164ns clock period: AS5047 min period is 100ns
-    
+                                                    // BAUD = 7 ~= 3MHz, less noisy... 
+                                                    // BAUD = 14 ~= 1.6MHz, much less noisy, reads are about 25us. 
     // enable interrupts 
-    NVIC_EnableIRQ(SERCOM4_0_IRQn);
     NVIC_EnableIRQ(SERCOM4_1_IRQn);
     NVIC_EnableIRQ(SERCOM4_2_IRQn);
-    NVIC_EnableIRQ(SERCOM4_3_IRQn);
-
     // turn it back on 
     while(ENC_SER_SPI.SYNCBUSY.bit.ENABLE);
     ENC_SER_SPI.CTRLA.bit.ENABLE = 1;
@@ -167,4 +165,30 @@ boolean ENC_AS5047::is_read_complete(void){
 
 uint16_t ENC_AS5047::get_reading(void){
     return result;
+}
+
+uint16_t ENC_AS5047::read_field_mag(void){
+    start_spi_interaction(AS5047_SPI_READ_MAG);
+    while(!readComplete);
+    return result;
+}
+
+String ENC_AS5047::read_enc_diagnostics(void){
+    start_spi_interaction(AS5047_SPI_READ_DIAG);
+    while(!readComplete);
+    uint16_t res = result;
+    boolean magHi = false;
+    boolean magLo = false;
+    boolean cordicOvf = false;
+    boolean compComplete = false;
+    if(res & (1 << 11)) magHi = true; // maghi 
+    if(res & (1 << 10)) magLo = true; // maglo 
+    if(res & (1 << 9)) cordicOvf = true; // cordic overflow 
+    if(res & (1 << 8)) compComplete = true; // offset compensation completed 
+    uint16_t agc = res & 0b0000000001111111;
+    return "magHi: " + String(magHi) 
+            + "\nmagLo: " + String(magLo)
+            + "\ncordicOverflow: " + String(cordicOvf)
+            + "\ncompensationComplete: " + String(compComplete)
+            + "\nautomaticGainCorrection: " + String(agc);
 }
\ No newline at end of file

firmware/cl-step-controller/src/drivers/enc_as5047.h

@@ -42,8 +42,12 @@ is; no warranty is provided, and users accept all liability.
 #define ENC_SER_GCLKNUM 8
 
 #define AS5047_SPI_READ_POS (0b1100000000000000 | 0x3FFF)
+#define AS5047_SPI_READ_POS_UNC (0b1100000000000000 | 0x3FFE)
 #define AS5047_SPI_NO_OP (0b1000000000000000)
 
+#define AS5047_SPI_READ_MAG (0b1100000000000000 | 0x3FFD)
+#define AS5047_SPI_READ_DIAG (0b1100000000000000 | 0x3FFC)
+
 class ENC_AS5047 {
     private:
         // is singleton
@@ -70,6 +74,9 @@ class ENC_AS5047 {
         boolean is_read_complete(void);
         uint16_t get_reading(void);
         void on_read_complete(uint16_t pos);
+        // *blocking*
+        uint16_t read_field_mag(void);
+        String read_enc_diagnostics(void);
 };
 
 extern ENC_AS5047* enc_as5047;

firmware/cl-step-controller/src/drivers/step_cl.cpp

@@ -73,9 +73,9 @@ void flash_write_init(void){
 }
 
 void flash_write_page(void){
-    sysError("erasing 0x" + String((uint32_t)block_ptr));
+    //sysError("erasing 0x" + String((uint32_t)block_ptr));
     flashClass.erase(block_ptr, BYTES_PER_BLOCK);
-    sysError("writing 0x" + String((uint32_t)block_ptr));
+    //sysError("writing 0x" + String((uint32_t)block_ptr));
     flashClass.write(block_ptr, (const uint8_t*)buffer, BYTES_PER_BLOCK);
     delay(1);
 }
@@ -115,7 +115,7 @@ float Step_CL::get_torque(void){
 void Step_CL::run_torque_loop(void){
     if(is_calibrating) return;
     // mark time 
-    DEBUG1PIN_ON;
+    //DEBUG1PIN_ON;
     // ok, first we read the encoder 
     enc_as5047->trigger_read();
     // this kicks off the party, proceeds below
@@ -124,34 +124,36 @@ void Step_CL::run_torque_loop(void){
 #define MAP_7p2_TO_1 (1.0F / 7.2F)
 #define TICKS_PER_SEC 50000.0F
 #define SECS_PER_TICK 1.0F / TICKS_PER_SEC
-volatile float q = 0.05F;//0.125F;      // process noise covariance  
-volatile float r = 1.0F;        // measurement noise covariance 
-volatile float measurement;     // the measurement... 
-volatile float a = 0.0F;        // the estimate on a 
-volatile float p = 100.0F;        // estimation error covariance 
-volatile float k;               // kalman gain 
-
-volatile float _deg_s;      // real angle / sec 
+
+volatile float a_measurement = 0.0F;
+volatile float last_measurement = 0.0F;
+volatile float a_est = 0.0F;
+volatile float a_last_est = 0.0F;
+volatile float a_alpha = 0.9F;       // trust in measurement 
+
 volatile float _pa;         // phase angle 
 
-float Step_CL::get_deg_sec(void){
-    return _deg_s;
+float Step_CL::get_last_pos_est(void){
+    return a_est;
+}
+
+float Step_CL::get_last_reading(void){
+    return a_measurement;
 }
 
 void ENC_AS5047::on_read_complete(uint16_t result){
     if(step_cl->is_calibrating) return;
-
-    // (1) get the new measurement,
-    measurement = lut[result * 2]; 
-
-    p = p + q;
-
-    k = p / (p + r);
-    a = a + k * (measurement - a);
-    p = (1 - k) * p;
-
-    // write a 'real' speed value 
-    _deg_s = measurement;
+    last_measurement = a_measurement;
+    a_measurement = lut[result * 2]; 
+    // wtf ?? 
+    // a_est = (a_measurement * a_alpha) + (a_last_est * (1 - a_alpha));
+    // a_last_est = a_est;
+    // or like 
+    // I am completely confused by the noise that this generates ? seems like it's taking a difference?
+    // should just be averaging? 
+    // something about getting the variables out, under interrupt? 
+    a_est = 0.5 * a_measurement + 0.5 * last_measurement;
+    //output = alpha * (input - output) + output 
 
     _pa = lut[result * 2 + 1];      // the phase angle (0 - 1 in a sweep of 4 steps)
     // this is the phase angle we want to apply, 90 degs off & wrap't to 1 
@@ -170,7 +172,6 @@ void ENC_AS5047::on_read_complete(uint16_t result){
     // with the *amount* commanded by our _tc torque ask 
     step_a4950->point(_pa, abs(step_cl->get_torque()));
     // debug loop completion 
-    DEBUG1PIN_OFF;
 }
 
 // the calib routine 

firmware/cl-step-controller/src/drivers/step_cl.h

@@ -33,7 +33,8 @@ class Step_CL {
         void print_table(void);
         void set_torque(float tc);
         float get_torque(void);
-        float get_deg_sec(void);
+        float get_last_pos_est(void);
+        float get_last_reading(void);
         void run_torque_loop(void);
         boolean calibrate(void);
         boolean is_calibrating;

firmware/cl-step-controller/src/drivers/ucbus_drop.cpp

@@ -100,6 +100,10 @@ void UCBus_Drop::init(boolean useDipPick, uint8_t ID) {
 	NVIC_EnableIRQ(SERCOM1_2_IRQn); // rx, 
   NVIC_EnableIRQ(SERCOM1_1_IRQn); // txc ?
   NVIC_EnableIRQ(SERCOM1_0_IRQn); // tx, 
+  // priority
+  NVIC_SetPriority(SERCOM1_2_IRQn, 1);
+  NVIC_SetPriority(SERCOM1_1_IRQn, 1);
+  NVIC_SetPriority(SERCOM1_0_IRQn, 1);
 	// set baud 
   UBD_SER_USART.BAUD.reg = UBD_BAUD_VAL;
   // and finally, a kickoff

firmware/cl-step-controller/src/drivers/ucbus_drop.h

@@ -105,7 +105,6 @@ class UCBus_Drop {
     // handlers 
     void onRxISR(void);
     void onPacketARx(void);
-    //void onPacketBRx(void);
     // our physical bus address, 
     volatile uint8_t id = 0;
     // the api, eh 

firmware/cl-step-controller/src/main.cpp

@@ -35,7 +35,7 @@ VPort* replyBlankVp;
 uint16_t replyBlankVpi = 0;
 uint16_t lastQueueSpaceTxd = 0;
 
-#define BUS_DROP 1    // Z: 1, YL: 2, X: 3, YR: 4
+#define BUS_DROP 4    // Z: 1, YL: 2, X: 3, YR: 4
 #define AXIS_PICK 2   // Z: 2, Y: 1, X: 0
 #define AXIS_INVERT false  // Z: false, YL: true, YR: false, X: false
 #define SPU 3200.0F // always positive! Z: 3200, XY: 400 
@@ -58,82 +58,48 @@ void setup() {
   d51_clock_boss->start_50kHz_ticker_tc0();
 }
 
-uint8_t bChPck[64];
+// 50kHz control tick 
+void TC0_Handler(void){
+  TC0->COUNT32.INTFLAG.bit.MC0 = 1;
+  TC0->COUNT32.INTFLAG.bit.MC1 = 1;
+  step_cl->run_torque_loop();
+}
 
+uint8_t bChPck[64];
 volatile float current_floating_pos = 0.0F;
 volatile int32_t current_step_pos = 0;
 volatile uint32_t delta_steps = 0;
-
 volatile float vel = 0.0F; 
 volatile float move_counter = 0.0F;
-
 volatile boolean setBlock = false;
-
 uint16_t tick = 0;
 
-void TC0_Handler(void){
-  TC0->COUNT32.INTFLAG.bit.MC0 = 1;
-  TC0->COUNT32.INTFLAG.bit.MC1 = 1;
-  step_cl->run_torque_loop();
-}
-
 // async loop 
 void loop() {
   osap->loop();
   step_a4950->dacRefresh();
-  /*
-  tick++;
-  if(tick > 500){
-    tick = 0;
-    enc_as5047->trigger_read();
-    while(!enc_as5047->is_read_complete());
-    uint16_t reading = 0b0011111111111111 & enc_as5047->get_reading();
-    //sysError(String(reading));
-  }
-  */
-  // do packet B grab / handle 
-  /*
+  // check chb packes 
   if(ucBusDrop->ctr_b()){
     uint16_t len = ucBusDrop->read_b(bChPck);
     uint16_t ptr = 0;
     switch(bChPck[ptr]){
-      case AK_SETCURRENT: {
-        // get currents 
-        ptr ++;
-        chunk_float32 currentChunks[3];
-        currentChunks[0] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        currentChunks[1] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        currentChunks[2] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        // set current
-        step_a4950->setCurrent(currentChunks[AXIS_PICK].f);
-        // bug here 
-        // I noticed that setcurrent commands to the z motor seem to fail: the motor drops to a low current no matter the value transmitted
-        // I've checked (by inserting a flag to pick y-values) here, and those values work well, so it's nothing with the motor driver itself
-        // so, I suspect the b-channel bus packets are coming out of those structures one byte short - makes sense there would be some bug in/around delineation 
-        break;
+      case AK_SET_TC: {
+          ptr ++;
+          chunk_float32 tcs = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] }};
+          step_cl->set_torque(tcs.f);
         }
-      case AK_SETPOS: {
-        // get posns, 
-        ptr ++;
-        chunk_float32 posChunks[3];
-        posChunks[0] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        posChunks[1] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        posChunks[2] = { .bytes = { bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++], bChPck[ptr ++] } };
-        float target_current_pos = posChunks[AXIS_PICK].f;
-        int32_t target_current_steps = lroundf(target_current_pos * SPU);
-        setBlock = true; // don't do step work while these are modified 
-        current_floating_pos = target_current_pos;
-        current_step_pos = target_current_steps;
-        setBlock = false;
-      }
-      default:
-        // noop,
         break;
+      case AK_RUNCALIB:
+        step_cl->calibrate();
+        break;
+      default:
+        // noop 
+        break;  
     }
   }
-  */
 } // end loop 
 
+// usb packets 
 void OSAP::handleAppPacket(uint8_t *pck, uint16_t pl, uint16_t ptr, uint16_t segsize, VPort* vp, uint16_t vpi, uint8_t pwp){
   // track end of header, to reply with 
   uint16_t replyPtr = ptr;
@@ -154,6 +120,19 @@ void OSAP::handleAppPacket(uint8_t *pck, uint16_t pl, uint16_t ptr, uint16_t seg
   // do the reading:
   ptr ++; // walk appcode DK_APP
   switch(pck[ptr]){
+    case AK_READ_MAG:{
+      ptr ++;
+      reply[rl ++] = AK_READ_MAG;
+      enc_as5047->read_enc_diagnostics();
+      uint16_t mag = enc_as5047->read_field_mag();
+      ts_writeUint16(mag, reply, &rl);
+      break;
+    }
+    case AK_READ_DIAG:
+      ptr ++;
+      reply[rl ++] = AK_READ_DIAG;
+      ts_writeString(enc_as5047->read_enc_diagnostics(), reply, &rl);
+      break;
     case AK_RUNCALIB:
       ptr ++; // walk stepcode 
       reply[rl ++] = AK_RUNCALIB;
@@ -175,8 +154,10 @@ void OSAP::handleAppPacket(uint8_t *pck, uint16_t pl, uint16_t ptr, uint16_t seg
         reply[rl ++] = AK_SET_TC;
         chunk_float32 tcs = { .bytes = { pck[ptr ++], pck[ptr ++], pck[ptr ++], pck[ptr ++] }};
         step_cl->set_torque(tcs.f);
-        float deg_sec = step_cl->get_deg_sec();
-        ts_writeFloat32(deg_sec, reply, &rl);
+        float pos_est = step_cl->get_last_pos_est();
+        float last_reading = step_cl->get_last_reading();
+        ts_writeFloat32(pos_est, reply, &rl);
+        ts_writeFloat32(last_reading, reply, &rl);
         break;
       }
     default:
@@ -194,92 +175,14 @@ void OSAP::handleAppPacket(uint8_t *pck, uint16_t pl, uint16_t ptr, uint16_t seg
   vp->clearPacket(pwp);
 }
 
+// on words rx'd from bus, 
 void UCBus_Drop::onRxISR(void){
-  /*
-  if(setBlock) return;
-  //DEBUG2PIN_TOGGLE;
-  move_counter += vel;
-  boolean move_check = (move_counter > 1.0F);
-  //DEBUG2PIN_TOGGLE;
-  if(move_check){
-    move_counter -= 1.0F;
-    if(delta_steps == 0){
-      // nothing 
-    } else {
-      //DEBUG1PIN_TOGGLE;
-      step_a4950->step();
-      delta_steps --;
-      if(step_a4950->getDir()){
-        current_step_pos ++;
-      } else {
-        current_step_pos --;
-      }
-    }
-  }
-  */
+
 }
 
+// on timed (interrupt) rx of bus packet, channel A 
+// this is where we will eventually read-in positions, and target them
 void UCBus_Drop::onPacketARx(void){
-  /*
-  if(setBlock) return;
-  //DEBUG2PIN_TOGGLE;
-  // last move is done, convert back steps -> float,
-  current_floating_pos = current_step_pos / SPU;
-  vel = 0.0F; // reset zero in case packet is not move 
-  uint8_t bptr = 0;
-  // switch bus packet types 
-  switch(inBufferA[0]){
-    case UB_AK_GOTOPOS:
-      {
-        bptr = AXIS_PICK * 4 + 1;
-        chunk_float32 target = {
-          .bytes = { inBufferA[bptr], inBufferA[bptr + 1], inBufferA[bptr + 2], inBufferA[bptr + 3] }
-        };
-        // chunk_float64 target = { 
-        //   .bytes = { inBuffer[bptr], inBuffer[bptr + 1], inBuffer[bptr + 2], inBuffer[bptr + 3],
-        //             inBuffer[bptr + 4], inBuffer[bptr + 5], inBuffer[bptr + 6], inBuffer[bptr + 7] }};
-        float delta = target.f - current_floating_pos;
-        // update,
-        //move_counter = 0.0F; // shouldn't need this ? try deleting 
-        // direction swop,
-        if(delta > 0){
-          step_a4950->dir(true);
-        } else {
-          step_a4950->dir(false);
-        }
-        // how many steps, 
-        delta_steps = lroundf(abs(delta * SPU));
-        // what speed 
-        vel = abs(delta * SPU) / TICKS_PER_PACKET;
-        // for str8 r8 
-        // if(delta_steps == 0){
-        //   vel = 0.0F;
-        // } else {
-        //   vel = abs(delta * SPU) / TICKS_PER_PACKET;
-        // }
-        break; // end gotopos 
-      }