Diff: main.cpp

Revision:

0:d229bc2fa375

Child:

1:f1d2d02d724d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Dec 02 23:29:32 2019 +0000
@@ -0,0 +1,110 @@
+#include "mbed.h"
+#include "HWsetup.h"
+
+//MicroLab, simplified. No DSA.
+
+
+DigitalOut ledpin(LED1);              // LED output 
+AnalogOut dac_1(PA_4);                // DAC output pin
+DigitalOut comp_time(PA_12);           // D2
+DigitalOut ref_trig(D6);
+
+
+
+Serial pc(PA_2, PA_3);
+int Lcount = 0;
+float U_ref = 0.0f;
+float U = 0.0f;
+float Uv = 0.0f;
+float Y = 0.0f;
+int Yint = 0;
+float ctrl_error = 0.0f;
+
+
+extern "C" void TIM1_UP_TIM16_IRQHandler(void) {
+  
+  if (TIM1->SR & TIM_SR_UIF ) {
+    //comp_time = 1;
+    if ( TIM1->CR1 & TIM_CR1_DIR ) {
+    
+    comp_time = 1;
+        
+        while ((ADC1->ISR) & ADC_ISR_EOC == 0 ) {}       //   wait til ADC finishes conversion
+        DAC->DHR12R1 = (ADC1->DR);                       //   set ADC value to DAC
+        
+        //set reference
+        if (Lcount == 250) {            U_ref = 1.0f; ref_trig = 1;}
+        if (Lcount == 500) {Lcount = 0, U_ref = 0.5f; ref_trig = 0;}
+        Lcount++;
+        
+        
+        // fix these
+        float ADC_gain = 1.0f;
+        float Current_gain = 1.0f;  
+        Uv = int(ADC1->DR) * ADC_gain;              //   get ADC input in volts
+        U = Uv * Current_gain;                         //   get U in amps, divide by resistor divider gain
+        
+        
+
+        //controller
+        ctrl_error = U_ref-U; 
+
+        // Bang-bang controller is written below. Replace this with your PI controller.
+        
+        if (U > 4096*0.5f) { Y = 0.1f*1440.0f; }   // ADC readings scaled correctly
+        if (U < 4096*0.2f) { Y = 0.9f*1440.0f; }
+        
+        
+        // end controller
+
+        float PWM_gain = 1.0f;      // fix this
+
+        Yint = Y*PWM_gain;           //convert Y to integer and scale
+        if (Yint > 1430) { Yint = 1430; }  // constrain
+        if (Yint < 0) { Yint = 0; }        
+        
+        TIM1->CCR1 = Yint;  // set duty cycle
+    
+        
+
+
+        }
+    comp_time = 0;
+    }
+  TIM1->SR = 0x0;
+}
+
+
+int main() {
+    
+    wait_ms(200);
+    pc.baud(115200);
+    pc.printf(" bumping clock  ");       // set micro freq to 72MHz
+    BumpClock();   // must be done before PWM setup, otherwise RCC gets confused
+    pc.baud(102400);                     // actually 115200
+    pc.printf(" clock ready ");
+    wait_ms(50);
+    Init_All_HW();                     // Setup PWM, ADC
+    wait_ms(50);
+    Init_ADC_Tim_Sync(); 
+    wait_ms(5);
+    TIM1->BDTR |= TIM_BDTR_MOE;    // enable switching
+    TIM1->DIER |= TIM_DIER_UIE;    // start interrupt
+    wait_ms(5);
+    
+    while(1) {
+        //while(1) {}
+        
+        
+        ledpin = !ledpin; // toggle LED
+        pc.printf(" ADC raw: %i ",ADC1->DR);
+        pc.printf("U, amps: %f ",U);
+          pc.printf(" Y, volts: %f ",Y);
+          pc.printf(" Y, PWM counts: %i ",Yint);
+          pc.printf(" \r\n");
+
+
+
+        
+    }
+}