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-rw-r--r--PICCode.X/bufferlib.c8
-rw-r--r--PICCode.X/bufferlib.h2
-rw-r--r--PICCode.X/main.c15
-rw-r--r--PICCode.X/nbproject/private/private.xml6
4 files changed, 20 insertions, 11 deletions
diff --git a/PICCode.X/bufferlib.c b/PICCode.X/bufferlib.c
index 4768c95..e9816a8 100644
--- a/PICCode.X/bufferlib.c
+++ b/PICCode.X/bufferlib.c
@@ -3,10 +3,10 @@
#define BUFFERSIZE 32
volatile int write = 0, numE = 0;
-volatile unsigned int buffer[BUFFERSIZE];
+volatile unsigned int buffer[BUFFERSIZE]; // Basic circular buffer. Prime for buffer overflows, probably.
- void putVal(int newValue) { // add a new value to the buffer
- buffer[write++] = newValue;
+ void putVal(int Vo, int ref) { // add a new value to the buffer
+ buffer[write++] = ref - Vo; // This is backwards because reasons
write %= BUFFERSIZE;
if (numE < BUFFERSIZE) {
@@ -27,7 +27,7 @@ volatile unsigned int buffer[BUFFERSIZE];
return(avg);
}
- void initBuffer() { // set all buffer values to zero
+ void initBuffer() { // set all buffer values to zero, likely also prime for a buffer overflow
int i;
for(i = 0; i < BUFFERSIZE; i++) {
buffer[i] = 0;
diff --git a/PICCode.X/bufferlib.h b/PICCode.X/bufferlib.h
index a218b8b..5619a47 100644
--- a/PICCode.X/bufferlib.h
+++ b/PICCode.X/bufferlib.h
@@ -5,7 +5,7 @@
extern "C" {
#endif
- void putVal(int newValue);
+ void putVal(int Vo, int ref);
int getAvg();
void initBuffer();
diff --git a/PICCode.X/main.c b/PICCode.X/main.c
index d9a7126..88d3f35 100644
--- a/PICCode.X/main.c
+++ b/PICCode.X/main.c
@@ -25,7 +25,7 @@ volatile int adValue;
void __attribute__((__interrupt__,__auto_psv__)) _ADC1Interrupt(void) {
_AD1IF = 0;
- putVal(ADC1BUF0); //Grab latest sampled value after conversion and place it in buffer
+ putVal(ADC1BUF0, ADC1BUF1); //Grab latest sampled value after conversion and place it in buffer
}
void __attribute__((__interrupt__,__auto_psv__)) _T2Interrupt(void) {
@@ -40,7 +40,7 @@ void setup (void) {
T2CON = 0; //Set up timer 2 to have a delay of 100ms
PR2 = 24999; //and enable the interrupt for timer 2
- T2CONbits.TCKPS = 2;
+ T2CONbits.TCKPS = 3;
T2CONbits.TON = 1;
_T2IE = 1;
_T2IF = 0;
@@ -56,13 +56,15 @@ void setup (void) {
T3CONbits.TON = 1;
AD1CON1 = 0, AD1CON2 = 0, AD1CON3 = 0;
+ AD1CSSL = 0x0003; //Set ADC1 to obtain both RA0 and RA1
_AD1IE = 1;
_AD1IF = 0;
AD1CON1bits.ASAM = 1; //Turn on automatic sampling
AD1CON1bits.SSRC = 2; //Use timer 3 to end sampling time
AD1CON2bits.VCFG = 0; //Configure reference voltages to be Vdd and GND
- AD1CON2bits.SMPI = 0; //Interrupt after completion of every conversion
+ AD1CON2bits.SMPI = 1; //Interrupt after completion of every 2nd conversion
+ AD1CON2bits.CSCNA = 1; //Enable sequential scanning on bits specified in AD1CSSL register above
AD1CON3bits.SAMC = 1; //Set Tsmp = 1*Tad
AD1CON3bits.ADCS = 1; //Set Tad = 2*Tcy
@@ -73,7 +75,7 @@ void setup (void) {
double VtoI(float value) {
//TODO: Verify this. I've done a few and the error seems to be no more than 0.5 mA
//MAKE SURE THE ERROR IS NEVER >=1.0mA (as per project description)
- return (double) ((value + 0.196) / 0.0335);
+ return (double) ((value + 0.204) / 0.032);
}
int main(void) {
@@ -85,7 +87,10 @@ int main(void) {
while(1) {
lcd_setCursor(0,0); //Setting the cursor to the top left corner of the display
- sprintf(adStr,"%6.4f A",VtoI((3.3/1024)*adValue)); //Formatting the string that will be written
+ int curr =VtoI((3.3/1024)*adValue);
+ if (curr < 0)
+ curr =0;
+ sprintf(adStr,"%6.4fmA",curr); //Formatting the string that will be written
lcd_printStr(adStr); //Writing the entire string to the display
}
diff --git a/PICCode.X/nbproject/private/private.xml b/PICCode.X/nbproject/private/private.xml
index 23ebd23..cc2ea97 100644
--- a/PICCode.X/nbproject/private/private.xml
+++ b/PICCode.X/nbproject/private/private.xml
@@ -3,7 +3,11 @@
<editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
<open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
<group>
- <file>file:/C:/Users/Public/Documents/Altium/Projects/EE3102Testing.X/spies046_lab6_main_v001.c</file>
+ <file>file:/C:/Users/Public/Documents/Altium/Projects/PICCode.X/bufferlib.c</file>
+ <file>file:/C:/Users/Public/Documents/Altium/Projects/PICCode.X/lcd.c</file>
+ <file>file:/C:/Users/Public/Documents/Altium/Projects/PICCode.X/main.c</file>
+ <file>file:/C:/Users/Public/Documents/Altium/Projects/PICCode.X/lcd.h</file>
+ <file>file:/C:/Users/Public/Documents/Altium/Projects/PICCode.X/bufferlib.h</file>
</group>
</open-files>
</project-private>