add mppt test code

tests/mpptTest/README.md

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+# MPPT test
+
+De MPPT test wordt grootendeels handmatig uitgevoerdt. Er wordt een arduino gebruikt om de initalisatie te starten.
+
+## setup
+
+### CC3220S
+
+In debugmode met de orginaile code.
+
+#### breakboints
+
+* mppt.c: mppt_start(): last usleep
+
+### Arduino
+
+De arduino wordt gebuikt voor het simuleeren van de volgende signaalen:
+
+* start initialisatie
+* start
+* SPI (direct naar de CC3220S ipv met I2C via de MSP)
+
+### dingen die gemeten worden
+
+* vermogen uit de motor
+* PWM signaal

tests/mpptTest/mpptTest.ino

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+#include <Wire.h>
+#include <SPI.h>
+#include <stdint.h>
+
+#define I2C Wire
+
+#define startInit_PIN 9
+#define startSys_PIN  8
+#define ready_PIN     7
+#define noodstop_PIN  6
+
+#define CSK_PIN   13
+#define MISO_PIN  12
+#define MOSI_PIN  11
+#define CSMSP_PIN 10
+
+typedef enum {
+  SPIPARM_maxVermogen,
+  SPIPARM_maxSnelheid,
+  SPIPARM_maxTemperatuur,
+  SPIPARM_setpoint,
+  SPIPARM_vermogen,
+  SPIPARM_snelheid,
+  SPIPARM_temperatuur,
+  SPIPARM_count
+} SPI_Register_t;
+uint8_t SPI_RxBuffer[4];
+uint8_t * SPI_TxBuffer;
+uint8_t SPI_Params[SPIPARM_count][2];
+uint8_t pos;
+
+void setSetpoint(uint8_t v){
+  SPI_Params[SPIPARM_setpoint][0] = v;
+}
+void setMaxVermogen(uint8_t v){
+  SPI_Params[SPIPARM_maxVermogen][0] = v;
+}
+void setMaxTemperatuur(uint8_t v){
+  SPI_Params[SPIPARM_maxTemperatuur][0] = v;
+}
+void setMaxSnelheid(uint16_t v){
+  SPI_Params[SPIPARM_maxSnelheid][0] = v & 0x0FF;
+  SPI_Params[SPIPARM_maxSnelheid][1] = v > 8;
+}
+
+void setup(){
+  Serial.begin(115200);
+  Serial.println("The Fantastic Five - Belasting regelaar - MPPT Test");
+  Serial.println("Init Arduino");
+
+  // init GPIO
+  pinMode(noodstop_PIN, INPUT);
+  digitalWrite(startInit_PIN, LOW);
+  pinMode(startInit_PIN, OUTPUT);
+  digitalWrite(startSys_PIN, LOW);
+  pinMode(startSys_PIN, OUTPUT);
+
+  // init I2C
+  I2C.begin();
+
+  // init SPI
+  pinMode(MISO_PIN, OUTPUT);
+  SPCR |= _BV(SPE); // set SPI in slave mode
+  SPI.attachInterrupt();
+
+  Serial.println("Init CC3220S");
+
+  // set all SPI params to 0
+  memset(&SPI_Params[0][0], 0x00, sizeof(SPI_Params));
+
+  // set max limits
+  setMaxVermogen(250);    // deci watts; 0 to 250
+  setMaxTemperatuur(120); // deg c; 60 to 120
+  setMaxSnelheid(60000);  // RPM; 0 to 60000
+
+  // set inital setpoint
+  setSetpoint(50); // deci watt; 0 to 250
+
+  // trigger the initalisation
+  digitalWrite(startInit_PIN, HIGH);
+
+  // sync paramaters until the CC3220S is ready
+  uint16_t timer = millis();
+  while(!digitalRead(ready_PIN)){
+    spiRun();
+  }
+
+  Serial.println("Start CC3220S");
+
+  // start the system
+  digitalWrite(startSys_PIN, 1);
+}
+
+ISR(SPI_STC_vect){
+  SPI_RxBuffer[pos] = SPDR;
+  if(pos == 0)
+    SPDR = *(SPI_TxBuffer);
+  else
+    SPDR = *(SPI_TxBuffer + 1);
+  pos--;
+}
+
+void spiRun(){
+  while(pos == 3)
+    continue;
+  
+  SPI_TxBuffer = &SPI_Params[SPI_RxBuffer[3]][0];
+
+  while(!digitalRead(CSMSP_PIN))
+    continue;
+  
+  pos = 3;
+}
+
+void loop(){
+  spiRun();
+
+  switch(SPI_RxBuffer[3]){
+    case SPIPARM_vermogen:
+      Serial.print("vermogen: ");
+      Serial.print(SPI_RxBuffer[1], DEC);
+      Serial.println(" deci watt");
+      if(SPI_RxBuffer[1] > 3 == SPI_Params[SPIPARM_setpoint][0] > 3){
+        Serial.println("reached setpoint :)");
+        setSetpoint((SPI_Params[SPIPARM_setpoint][0] == 50) ? 100 : 50);
+      }
+      break;
+    case SPIPARM_snelheid:
+      Serial.print("snelheid: ");
+      Serial.print(SPI_RxBuffer[1] + SPI_RxBuffer[0]*0x100, DEC);
+      Serial.println(" RPM");
+      break;
+    case SPIPARM_temperatuur:
+      Serial.print("temperatuur: ");
+      Serial.print(SPI_RxBuffer[1], DEC);
+      Serial.println(" dec c");
+      break;
+  }
+}

tests/mpptTest/pinout.md

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+# pinout Arduino
+
+## GPIO
+
+| lable      | pin |
+|------------|----:|
+| start init |   9 |
+| start sys  |   8 |
+| ready      |   7 |
+| noodstop   |   6 |
+
+## I2C
+
+| lable | pin |
+|-------|----:|
+| SDA   | A4  |
+| SCL   | A5  |
+
+## SPI
+
+| lable  | pin |
+|--------|----:|
+| CSK    |  13 |
+| MISO   |  12 |
+| MOSI   |  11 |
+| CS MSP |  10 |