Differences

This shows you the differences between two versions of the page.

--- vatt:mirror_cell_thermal_reader [2014/09/02 23:43]
scott created
+++ vatt:mirror_cell_thermal_reader [2014/09/03 10:11] (current)
scott
@@ Line 1: / Line 1: @@
 =====VATT Thermal System=====
-The VATT Thermal System is controlled by an Arduino Mega board located in the mirror cell. It is connected to 7 analog 8D590K thermal sensors. Four of these sensors are located on the telescope struts and 3 are in the mirror cell. The Arduino board communicates with vatttel through an RS-232 serial port. vatttel (TCS) requests the thermal information from each thermal sensor over the serial port by sending a 't' followed a carriage return '\r'. The arduino board then sends a string of white space separated temperatures.
+The VATT Thermal System is controlled by an Arduino Mega board located in the mirror cell. It is connected to 7 analog AD 590K thermal sensors. Four of these sensors are located on the telescope struts and 3 are in the mirror cell. The Arduino board communicates with vatttel through an RS-232 serial port. vatttel (TCS) requests the thermal information from each thermal sensor over the serial port by sending a 't' followed a carriage return '\r'. The arduino board then sends a string of white space separated temperatures.
@@ Line 20: / Line 20: @@
 ===Firmware===
-Firmware as of 9-2-2014
+Firmware as of 9-3-2014
 <code>
 #include <Wire.h>
@@ Line 31: / Line 31: @@
 #define MV_PER_CNT 0.188
 #define KELS_PER_CNT MV_PER_CNT/MV_PER_KEL
+/*This is the firmware that resides on the Arduino mMega
+VATT Thermal system board. It reads in temperatures from
+seven analog sensors located on the VATT Telescope. When
+Querried with a 't\r' via its serial port  it returns a string
+of 7 white space seperated temperatures followed by a '\n'
+The order of the sensor data located in the return string is as follows:
+MIRROR_TEMP MIRROR_AIR_TEMP MIRROR_TEMP AIR_TEMP STRUT_TEMP STRUT_TEMP AIR_TEMP
+For more information on the VATT thermal system please go to this website:
+https://soweb.as.arizona.edu/~tscopewiki/doku.php?id=vatt:mirror_cell_thermal_reader
+Author Scott Swindell
+Date 9-3-2014
+*/
@@ Line 46: / Line 65: @@
 short sum_iter = 1;//keeps count of how many we have summed
-/*these are offset values inherit
-in the electronics. The value 0.56mv
-was measured fot the first channel
-only and needs to be measure for all
-channels.
-*/
-//Temps look good but just in case we need offsets in the future.
-float temp_offsets[NCHAN] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
+//Offsets. Most of this is counter-acting the hard coded offsets in
+//vatttel
+float temp_offsets[NCHAN] = {0.4, 2.7, 0.4, -1.5, 3.3, 3.3, -1.5, 0.0};
 void setup(void)
@@ Line 176: / Line 193: @@
     {
       toggle13();//toggle the light for debug
-      Serial3.print('t\r');
+      //Serial3.print('t\r');
+      //vatttel expects an echo.
+      printTemps( adc );
       printTemps( adc );

MOON

User Tools

Site Tools

Differences

Page Tools