From c9bc24d8a77bd608023e656685ac4cf46ab9df71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lucas=20Ple=C3=9F?= <lucas@xleave.de>
Date: Wed, 12 Jun 2013 01:50:54 +0200
Subject: [PATCH] added first draft of overvoltage protection by using dump
 load

---
 display/software/.idea/workspace.xml   |  6 +-
 display/software/powerboard/src/main.c | 92 ++++++++++++++++----------
 2 files changed, 62 insertions(+), 36 deletions(-)

diff --git a/display/software/.idea/workspace.xml b/display/software/.idea/workspace.xml
index 4a28a62..887419c 100644
--- a/display/software/.idea/workspace.xml
+++ b/display/software/.idea/workspace.xml
@@ -2,12 +2,14 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="9fad4545-a424-4a82-86dc-76602cf3eef3" name="Default" comment="">
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/powerboard/src/main.c" afterPath="$PROJECT_DIR$/powerboard/src/main.c" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
     </list>
     <ignored path="bikegenerator.iws" />
     <ignored path=".idea/workspace.xml" />
     <file path="/Makefile" changelist="9fad4545-a424-4a82-86dc-76602cf3eef3" time="1370979337668" ignored="false" />
     <file path="/Dummy.txt" changelist="9fad4545-a424-4a82-86dc-76602cf3eef3" time="1370989840314" ignored="false" />
+    <file path="/main.c" changelist="9fad4545-a424-4a82-86dc-76602cf3eef3" time="1370991964646" ignored="false" />
     <option name="TRACKING_ENABLED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -80,7 +82,7 @@
       <file leaf-file-name="main.c" pinned="false" current="true" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/powerboard/src/main.c">
           <provider selected="true" editor-type-id="text-editor">
-            <state line="14" column="53" selection-start="265" selection-end="265" vertical-scroll-proportion="-1.0426009">
+            <state line="122" column="12" selection-start="2842" selection-end="2842" vertical-scroll-proportion="1.8497758">
               <folding />
             </state>
           </provider>
@@ -519,7 +521,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/powerboard/src/main.c">
       <provider selected="true" editor-type-id="text-editor">
-        <state line="14" column="53" selection-start="265" selection-end="265" vertical-scroll-proportion="-1.0426009">
+        <state line="122" column="12" selection-start="2842" selection-end="2842" vertical-scroll-proportion="1.8497758">
           <folding />
         </state>
       </provider>
diff --git a/display/software/powerboard/src/main.c b/display/software/powerboard/src/main.c
index 56a289e..2354dcf 100644
--- a/display/software/powerboard/src/main.c
+++ b/display/software/powerboard/src/main.c
@@ -22,10 +22,15 @@
 #define DUMP_ON		PORT_SW |= _BV(DUMPSW)
 #define DUMP_OFF	PORT_SW &= ~_BV(DUMPSW)
 
-typedef enum {
-	generated,
-	consumed
-} power_source;
+#define OVERVOLTAGE1    144
+#define OVERVOLTAGE2    150
+#define OVERVOLTAGE_TIMEOUT1    20
+#define OVERVOLTAGE_TIMEOUT2    20
+
+#define CURRENT_OFFSET  511
+#define CURRENT_PER_TICK    72
+#define TICKS_PER_VOLTAGE   6.6
+
 
 
 volatile uint16_t syscounter = 0;
@@ -33,6 +38,10 @@ uint16_t voltage = 0;
 int16_t current_in = 0;
 int16_t current_out = 0;
 
+uint16_t overvoltage_counter = 0;
+uint16_t overvoltage_off_counter = 0;
+
+
 void timer_init(void) {
 	// clock is 8MHz
 	TCCR1B |= _BV(WGM12) | _BV(CS11) | _BV(CS10) ; // CTC Mode for Timer 1 (16Bit) with prescale of 64
@@ -47,15 +56,15 @@ void ports_init(void) {
 }
 
 void measure(void) {
-    voltage = adc_read_avg(AD_V, 4) / 6.6;
+    voltage = adc_read_avg(AD_V, 4) / TICKS_PER_VOLTAGE;
 
     current_in = adc_read_avg(AD_I_GEN, 4);
-    current_in -= 510;
-    current_in *= 72;
+    current_in -= VOLTAGE_OFFSET;
+    current_in *= CURRENT_PER_TICK;
 
     current_out = adc_read_avg(AD_I_LOAD, 4);
-    current_out -= 511;
-    current_out *= 72;
+    current_out -= VOLTAGE_OFFSET;
+    current_out *= CURRENT_PER_TICK;
 }
 
 uint8_t get_power(uint16_t voltage, int16_t currents) {
@@ -79,41 +88,55 @@ int main(void) {
 	
 	while(1) {
 
-	    measure();
+        if((syscounter % 100) == 0) {
 
-        uart_puts_P("Voltage:   ");
-        uart_puts ( itoa ( voltage, s, 10 ) );
-        uart_puts_P("dV\r\n");
+            measure();
 
-        uart_puts_P("Load:      ");
-        uart_puts ( itoa ( current_out, s, 10 ) );
-        uart_puts_P("mA  ");
+            uart_puts_P("Voltage:   ");
+            uart_puts ( itoa ( voltage, s, 10 ) );
+            uart_puts_P("dV\r\n");
 
-        uart_puts ( itoa ( get_power(voltage, current_out), s, 10 ) );
-        uart_puts_P("W\r\n");
+            uart_puts_P("Load:      ");
+            uart_puts ( itoa ( current_out, s, 10 ) );
+            uart_puts_P("mA  ");
+
+            uart_puts ( itoa ( get_power(voltage, current_out), s, 10 ) );
+            uart_puts_P("W\r\n");
 
 
-        uart_puts_P("Generator: ");
-        uart_puts ( itoa ( current_in, s, 10 ) );
-        uart_puts_P("mA  ");
+            uart_puts_P("Generator: ");
+            uart_puts ( itoa ( current_in, s, 10 ) );
+            uart_puts_P("mA  ");
 
-        uart_puts ( itoa ( get_power(voltage, current_in), s, 10 ) );
-        uart_puts_P("W\r\n");
+            uart_puts ( itoa ( get_power(voltage, current_in), s, 10 ) );
+            uart_puts_P("W\r\n");
 
 
+            if(voltage > OVERVOLTAGE1) {
+                overvoltage_off_counter = 0;
+                overvoltage_counter++;
+            } else {
+                overvoltage_counter = 0;
+                overvoltage_off_counter++;
+            }
+
+            uart_puts_P("overvoltage_counter=");
+            uart_puts ( itoa ( overvoltage_counter, s, 10 ) );
+            uart_puts_P("  overvoltage_off_counter=");
+            uart_puts ( itoa ( overvoltage_off_counter , s, 10 ) );
+
+            if(overvoltage_counter >= OVERVOLTAGE_TIMEOUT1) {
+                overvoltage_off_counter = 0;
+                DUMP_ON;
+            }
+
+            if(overvoltage_off_counter >= OVERVOLTAGE_TIMEOUT1/2) {
+                overvoltage_counter = 0;
+                DUMP_OFF;
+            }
 
 
-
-        wait(100);
-        wait(100);
-        wait(100);
-        wait(100);
-        //wait(100);
-        //wait(100);
-        wait(100);
-        wait(100);
-
-		
+        }
 	}
 	
 	return(0);
@@ -122,6 +145,7 @@ int main(void) {
 // system timer
 SIGNAL(TIMER1_COMPA_vect) {
 	syscounter++;
+	syscounter %= 60000;
 }