Diff: main.cpp

Revision:

0:a28a1035c31b

Child:

1:0182b86f9bd4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jan 22 20:11:52 2018 +0000
@@ -0,0 +1,338 @@
+// MBED SCRIPT FOR CONTROLLING THE TEMPERATURE CONTROLLED TEST FIXTURE
+// AUTHOR: JUSTIN RODENBURG
+// DATE: SEPTEMBER 2017
+
+#include "mbed.h"
+#include "MODSERIAL.h"
+#include "MCP23008.h"
+#include "LTC2487.h"
+
+//DEFINITIVE VARIABLES
+#define DEBUG         0
+#define CHN_COUNT     48
+#define MIN_TEMP      15
+#define MAX_TEMP      60
+#define HYST          0.2
+#define SAMPLES       5
+#define I2C_Freq      2000
+#define VALVE         0
+#define HEATER        1
+#define STATUS_GOOD   2
+#define STATUS_BAD    3
+#define sizeLUT       34
+#define FRONT_THERM   0
+#define BACK_THERM    1
+#define HEAT_FET_AMP  2
+#define VALV_FET_AMP  3
+
+//I2C AADRESS LOOK UP TABLE, CREATED IN EXCEL SHEET (COUNT, TEMP)
+const struct I2C_ADDR_LUT{
+   int adc;
+   int io;
+};
+
+I2C_ADDR_LUT addrLUT[] = {
+    {0x23, 0x10},
+    {0x53, 0x60},
+    {0x43, 0x70},
+    {0x73, 0x40},
+    {0x63, 0x50},
+    {0x22, 0x11},
+    {0x52, 0x61},
+    {0x42, 0x71},
+    {0x72, 0x41},
+    {0x62, 0x51},
+    {0x21, 0x12},
+    {0x51, 0x62},
+    {0x41, 0x72},
+    {0x71, 0x42},
+    {0x61, 0x52},
+    {0x20, 0x13},
+    {0x50, 0x63},
+    {0x40, 0x73},
+    {0x70, 0x43},
+    {0x60, 0x53},
+    {0x26, 0x14},
+    {0x56, 0x64},
+    {0x46, 0x74},
+    {0x76, 0x44},
+    {0x66, 0x54},
+    {0x2C, 0x1F},
+    {0x5C, 0x6F},
+    {0x4C, 0x7F},
+    {0x7C, 0x4F},
+    {0x6C, 0x5F},
+    {0x2D, 0x1E},
+    {0x5D, 0x6E},
+    {0x4D, 0x7E},
+    {0x7D, 0x4E},
+    {0x6D, 0x5E},
+    {0x2E, 0x1D},
+    {0x5E, 0x6D},
+    {0x4E, 0x7D},
+    {0x7E, 0x4D},
+    {0x6E, 0x5D},
+    {0x2F, 0x1C},
+    {0x5F, 0x6C},
+    {0x4F, 0x7C},
+    {0x7F, 0x4C},
+    {0x6F, 0x5C},
+    {0x20, 0x1B},
+    {0x50, 0x6B},
+    {0x40, 0x7B},  
+};
+
+//THERMISTOR LOOK UP TABLE, CREATED IN EXCEL SHEET (COUNT, TEMP)
+const struct THERM_LUT{
+   int adc;
+   int temp;
+};
+
+THERM_LUT thermLUT[] = {
+    {113779,-40},
+    {109152,-35},
+    {103830,-30},
+    {97855,-25},
+    {91319,-20},
+    {84352,-15},
+    {77124,-10},
+    {69820,-5},
+    {62621,0},
+    {55693,5},
+    {49169,10},
+    {43144,15},
+    {37669,20},
+    {32768,25},
+    {28429,30},
+    {24622,35},
+    {21309,40},
+    {18439,45},
+    {15962,50},
+    {13831,55},
+    {12002,60},
+    {10428,65},
+    {9080,70},
+    {7919,75},
+    {6923,80},
+    {6063,85},
+    {5323,90},
+    {4685,95},
+    {4130,100},
+    {3653,105},
+    {3234,110},
+    {2876,115},
+    {2563,120},
+    {2284,125}
+};
+
+//DEFINE PINS
+DigitalOut myled(LED2);
+
+//I2C FOR MCP23008 (I/O Control)
+//I2C i2c_IO(PTC9, PTC8); //sda, scl
+MCP23008 io_control(PTC9, PTC8, 0x10, 2000);
+MODSERIAL pc(USBTX, USBRX);
+
+//I2C FOR LTC2487 (ADC Control)
+//I2C i2c_ADC(PTC11, PTC10); //sda, scl
+LTC2487 ltc2487(PTC11, PTC10, 0x23, 3000);
+
+//GLOBAL VARIABLES
+//channel status varaibles: init. to off and 0 degrees
+float chTemps[CHN_COUNT] = {};
+float chGoalTemps[CHN_COUNT] = {};  
+int chStatus[CHN_COUNT] = {};
+
+
+
+
+
+/* Function: get_temp
+   **************************************************************
+   Description: Retrieve data from thermistor
+   Recieves: chn: the channel of the fixture to read temp. from
+   Returns: the temperature of the fixture (front or back)
+*/
+
+float get_temp(int chn){
+    ltc2487.setAddress(addrLUT[chn].adc);
+    
+    float ADC_val = (65536*1.334)/2.5;//ltc2487.readOutput(chn);
+    
+    //pc.printf("ADC VAL: %f %i\r\n", ADC_val);
+    
+    int i = 0;
+    
+    while((i < sizeLUT) && (thermLUT[i].adc > ADC_val)){
+        i++;    
+    }  //find the temp. above therm temp
+    
+    //Point slope formula extrapolation: 
+    // y1 = m (x1-x0)+ y0 , y = temp. value, x = adc value
+    // y1 = thermLUT[i-1].temp   y0 = thermLUT[i].temp
+    // x1 = thermLUT[i-1].adc    x0 =thermLUT[i].adc
+    float a = float(thermLUT[i-1].temp - thermLUT[i].temp); //slope of temp between points where therm temp is between (Tmax - Tmin)
+    float b = float(thermLUT[i-1].adc - thermLUT[i].adc);   //slope of adc between points where therm adc is between (Amax - Amin)
+    
+    float m = a/b;
+    float y = (m*(ADC_val-thermLUT[i].adc))+thermLUT[i].temp;
+    
+    return y;  
+}
+
+
+/* Function: get_heater_current
+   **************************************************************
+   Description: Retrieve current into heater control MOSFET
+   Recieves: chn: the channel of the fixture to read current from
+   Returns: the current into the heater control MOSFET
+*/
+
+float get_heater_current(int chn){
+    
+}
+
+/* Function: get_valve_current
+   **************************************************************
+   Description: Retrieve current into valve control MOSFET
+   Recieves: chn: the channel of the fixture to read current from
+   Returns: the current into the valve control MOSFET
+*/
+
+float get_valve_current(int chn){
+    
+}
+
+/* Function: turn_valve_on
+   **************************************************************
+   Description: Turn valve on
+   Recieves: chn: the channel of the fixture 
+   Returns: nothing
+*/
+
+float turn_valve_on(int chn){
+    io_control.setAddress(addrLUT[chn].io);
+    io_control.init();
+    io_control.writeOutput(VALVE, 1);
+}
+
+/* Function: turn_valve_off
+   **************************************************************
+   Description: Turn valve off
+   Recieves: chn: the channel of the fixture 
+   Returns: nothing
+*/
+
+float turn_valve_off(int chn){
+    io_control.setAddress(addrLUT[chn].io);
+    io_control.init();
+    io_control.writeOutput(VALVE, 0);
+}
+
+/* Function: turn_heater_on
+   **************************************************************
+   Description: Turn heater on
+   Recieves: chn: the channel of the fixture 
+   Returns: nothing
+*/
+
+float turn_heater_on(int chn){
+    io_control.setAddress(addrLUT[chn].io);
+    io_control.init();
+    io_control.writeOutput(HEATER, 1);
+}
+
+/* Function: turn_heater_off
+   **************************************************************
+   Description: Turn heater off
+   Recieves: chn: the channel of the fixture 
+   Returns: nothing
+*/
+
+float turn_heater_off(int chn){
+    io_control.setAddress(addrLUT[chn].io);
+    io_control.init();
+    io_control.writeOutput(HEATER, 0);
+}
+
+/* Function: status_led
+   **************************************************************
+   Description: Turn status LED on (turns on green or red)
+   Recieves: chn: the channel of the fixture 
+             status: the status of channel (good (1) or bad (0))
+   Returns: nothing
+*/
+
+float status_led(int chn, int status){
+    io_control.setAddress(addrLUT[chn].io);
+    if(status){
+        io_control.writeOutput(STATUS_GOOD, 1);
+        io_control.writeOutput(STATUS_BAD, 0);    
+    }
+    else{
+        io_control.writeOutput(STATUS_BAD, 1);
+        io_control.writeOutput(STATUS_GOOD, 1);
+    }
+}
+
+
+
+int main() {
+    //GPIO TEST
+    /*io_control.init();
+    turn_heater_on(0);
+    wait(1);
+    io_control.writeOutput(VALVE, 1);
+    wait(1);
+    io_control.writeOutput(HEATER, 1);
+    wait(1);
+    io_control.writeOutput(STATUS_GOOD, 1);
+    wait(1);
+    io_control.writeOutput(STATUS_BAD, 1);
+    wait(1);
+    io_control.writeOutput(VALVE, 0);
+    wait(1);
+    io_control.writeOutput(HEATER, 0);
+    wait(1);
+    io_control.writeOutput(STATUS_GOOD, 0);
+    wait(1);
+    io_control.writeOutput(STATUS_GOOD, 0);
+    wait(1);
+    io_control.writeOutput(STATUS_BAD, 0);
+    wait(1);*/
+    
+    
+    //ADCD TEST
+    //io_control.init();
+    //io_control.writeOutput(STAT_GOOD_ON, 1);
+    //pc.printf("HERE\r\n");
+    //float resulttt = ltc2487.readOutput(0);
+    //pc.printf("STATE: %f \r\n", get_temp(FRONT_THERM));
+    
+    io_control.init();
+    //turn_heater_on(1);
+    //turn_valve_on(0);
+    myled = 1;
+    //wait(2);
+    //turn_heater_on(0);
+    //io_control.writeOutput(BACK_THERM, 1);
+    
+    while(1) {
+        turn_heater_on(0);
+        turn_heater_on(1);
+        turn_heater_on(2);
+        //turn_heater_on(1);
+        /*turn_heater_on(1);
+        wait(1);
+        turn_valve_on(0);
+        wait(1);
+        turn_heater_off(1);
+        wait(1);
+        turn_valve_off(0);
+        wait(1);
+        myled = 1;
+        wait(0.2);
+        myled = 0;
+        wait(0.2);*/
+    }
+}