test CV curve

simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/impedance_meter.h

@@ -604,7 +604,7 @@ static void DPVCurve(){
     return;
 }
 
-static void CVCurve(){
+static void CVCurve_tmp(){
     static uint8_t ramp0;
     static uint8_t ramp1;
     static int16_t outputV = VoltOrigin;
@@ -635,7 +635,6 @@ static void CVCurve(){
 
 
     // check if we reach the final volt
-    /* 
     if ( ramp >= VoltFinal) {
         Step = !Step; // reverse the Step direction
     }
@@ -665,8 +664,52 @@ static void CVCurve(){
     }
     ramp0  = ramp0 - Step; 
 
-    */
-   if((outputV == VoltFinal) || (outputV == VoltFinal) ) Step = !Step;
+
+}
+
+static void CVCurve(){
+    static uint8_t ramp0;
+    static uint8_t ramp1;
+    static int16_t outputV = VoltOrigin;
+    static bool first_cycle = true;
+    uint16_t ramp = 0;
+    float VoltValue;
+
+    // reset origin volt at the begin
+    if (DACreset){
+        if(!PeriodicEvent) PeriodicEvent = true;
+        ramp0 = (uint8_t) (VoltOrigin & 0x00FF); //right byte
+        ramp1 = (uint8_t) ((VoltOrigin>>8) & 0x00FF); //left byte
+        DACreset = false;
+        
+    }
+
+    // output a certain volt
+    ramp = ( (uint16_t) (ramp1)<<8 ) | ( (uint16_t) (ramp0) );
+
+    DAC_outputV(outputV);
+
+    // record the output voltage
+    int32_t Vout = 0;
+    int16_t decode = (int16_t)(ramp1 << 8) | (uint16_t)(ramp0); //ramp1 ramp0 
+    VoltValue = decode * (-2.9780379) + 5920.324416;
+    Vout = (int32_t) (VoltValue / 1);
+    // VoltValue = (ramp1*16 + ramp0/16) * 3.05;
+
+
+    if ( ramp >= VoltFinal) {
+        Step = !Step; // reverse the Step direction
+    }
+    else if (ramp <= VoltOrigin) {
+        Step = !Step;
+        if (INSTRUCTION.CycleNumber == 0) {
+            PeriodicEvent = false;  //periodic event end
+            first_cycle = true;
+            DACreset = true;
+            return;
+        }  
+        INSTRUCTION.CycleNumber--;
+    }
 
     outputV = outputV + Step;