Diff: main.cpp

Revision:

8:dbf8bd4815f8

Parent:

7:8a5e65e63e2a

Child:

9:1cada1fe4743

Child:

10:8cd14861dc63

--- a/main.cpp	Tue Mar 20 19:22:55 2018 +0000
+++ b/main.cpp	Wed Mar 28 01:25:07 2018 +0000
@@ -3,35 +3,87 @@
 
 #include "mbed.h"
 #include "MODSERIAL.h"
-#include "MCP23008.h"A
+#include "MCP23008.h"
 #include "LTC2487.h"
 #include <string>
 
 //DEFINITIVE VARIABLES
-#define DEBUG           0
-#define DEBUG1          1
-#define DEBUG2          1
-#define DEBUG3          1
-#define CHN_COUNT       8
-#define MIN_TEMP        15
-#define MAX_TEMP        60
-#define TEMP_MARGIN     5
-#define HYST            0.3
-#define SAMPLES         5
-#define I2C_Freq        2000
-#define VALVE           1
-#define HEATER          2
-#define STATUS_GOOD     3
-#define STATUS_BAD      4
-#define sizeLUT         34
-#define FRONT_THERM     0
-#define BACK_THERM      1
-#define HEAT_FET_AMP    2
+#define DEBUG            0
+#define DEBUG1           1
+#define DEBUG2           1
+#define DEBUG3           1
+#define CHN_COUNT        8
+#define MIN_TEMP         15
+#define MAX_TEMP         60
+#define TEMP_MARGIN      5
+#define HYST_LOW         0.3
+#define HYST_HIGH        1
+#define SAMPLES          5
+#define I2C_Freq         2000
+#define VALVE            1
+#define HEATER           2
+#define STATUS_GOOD      3
+#define STATUS_BAD       4
+#define sizeLUT          34
+#define FRONT_THERM      0
+#define BACK_THERM       1
+#define HEAT_FET_AMP     2
 #define VALVE_FET_AMP    3
-#define FET_ON_CURRENT  1.12
-#define ROOM_TEMP       22 
+#define FET_ON_CURRENT   1.12
+#define ROOM_TEMP        22 
  
+// Defines for use with Serial communication
+#pragma pack (1)
+#define RX_SOF                  0x7B
+#define RX_EOF                  0x7D
+#define TX_SOF                  0x7B
+#define TX_EOF                  0x7D
+#define DELIMETER               0x2E
+#define SET_TEMPERATURE         0xB0
+#define SELECT_CHANNEL          0xB1
+#define CMD_RESPONSE            0xD0
+#define CMD_DATA                0xD1
 
+unsigned int chanSel_SendTemp = 0;
+unsigned int chanSel_SetTemp = 0;
+// Default to chan 0
+int currChan = 0;
+bool newTempSet = false;
+
+//***********************************************
+// Serial Rx Packet Format
+//***********************************************
+typedef struct {
+    unsigned char SOF_flag;
+    unsigned char cmd_type;
+    unsigned char len;
+    unsigned char Delim;
+} HOST_CMD_HEADER;
+
+typedef struct {
+    HOST_CMD_HEADER cmd_header;
+    unsigned char chanID;
+    unsigned char tempDelim;
+    float setTemp;
+    unsigned char chanStatDelim;
+    unsigned char chanStat;
+} SET_TEMPERATURE_CMD;
+
+typedef struct {
+    HOST_CMD_HEADER cmd_header;
+    unsigned char chanIDSel;
+    unsigned char chanDelim;
+    unsigned char chanStat;
+} SELECT_CHANNEL_CMD;
+
+typedef struct {
+    unsigned char SOF_flag;
+    unsigned char cmd_type;
+    unsigned char len;
+    unsigned char Delim;
+    float data;
+    unsigned char EOF_flag;
+} RESPONSE_CMD;
 
 //TCTF CHANNEL DATA
 struct CHNL_DATA{
@@ -41,14 +93,23 @@
 };
 
 CHNL_DATA chnlStatus[] = {
-    {1, 16, 0},
-    {1, 56, 0},
+    /*TOP{1, 61, 0},
+    {1, 61, 0},
+    {1, 51, 0},
+    {1, 51, 0},
+    {1, 61, 0},
+    {1, 61, 0},
+    {1, 51, 0},
+    {1, 51, 0},*/
+    {1, 42, 0},
+    {1, 41, 0},
     {1, 31, 0},
-    {1, 30, 0},
-    {1, 15, 0},
-    {1, 0, 0},
-    {1, 40, 0},
-    {1, 45, 0},
+    {1, 31, 0},
+    {1, 41, 0},
+    {1, 41, 0},
+    {1, 31, 0},
+    {1, 31, 0},
+    {0, NULL, 0},
     {0, NULL, 0},
     {0, NULL, 0},
     {0, NULL, 0},
@@ -205,7 +266,8 @@
 LTC2487 ltc2487(PTC11, PTC10, 0x23, 200000); //sda, scl
 
 //GLOBAL VARIABLES
-volatile bool dataRecieved = false; //used to check if data has been recieved
+volatile bool dataReceived = false; //used to check if data has been recieved
+volatile bool dataTxReady = false;
 char rxBuf[50];
 int chnlSel;
 
@@ -223,63 +285,103 @@
     io_control.writeOutput(0,0,0,0);
 }
 
+
 /* Function: rxInterrupt
    **************************************************************
-   Description: serial rx interupt handler 
-   Recieves: N/A
-   Returns: N/A     
+   Description: serial rx interupt handler
+   Receives: N/A
+   Returns: N/A
 */
 
-void rxInterrupt(MODSERIAL_IRQ_INFO *info){
-    dataRecieved = true;
-    if(DEBUG) pc.printf("DATA RECIEVED \r\n");
+DigitalOut rLed(LED1);
+DigitalOut gLed(LED2);
+
+//***********************************************
+// Rx Interrupt from serial Host interface
+//***********************************************
+void rxInterrupt(MODSERIAL_IRQ_INFO *info)
+{
+    gLed = 0;
+    dataReceived = true;
+    gLed = 1;
 }
 
+
+//***************************************************************
+// Tx Interrupt from serial Host interface
+//***************************************************************
+void txInterrupt(MODSERIAL_IRQ_INFO *info)
+{
+    dataTxReady = true;
+}
+
+
 /* Function: parseRXData
    **************************************************************
    Description: The parse recieved data into 
-   Recieves: chn: The channel we want to put into the channel
+   Recieves: N/A
    Returns: N/A     
 */
 
-void parseRXData(){
-    int pCount = 0; //count data collected
-    int i = 0;
-    int chnl;
+void parseRXData()
+{
+    HOST_CMD_HEADER *pRxPktHdr;
     string data = "";
+    unsigned char *ptemp;
+    int i;
+
+    pRxPktHdr = (HOST_CMD_HEADER *)rxBuf;
+
+#ifdef DEBUG
+    pc.printf("DBG: fl = %02x\n", pRxPktHdr->SOF_flag);
+    pc.printf("DBG: len = %02x\n", pRxPktHdr->len);
+#endif
+
+    // Exit if the packet does not contain correct header
+    // Maybe send NAK?
+    if ((pRxPktHdr->SOF_flag != RX_SOF) || (pRxPktHdr->Delim != DELIMETER))
+        return;
 
-    if(DEBUG) pc.printf("buff1 = <%s> \r\n", rxBuf);
-    
-    while(pCount < 3){
-        if(rxBuf[i] != '.'){
-            data += rxBuf[i];
-        }
-        else{
-            pCount++; 
-            if(pCount == 1){ //get channel
-                if((atoi(data.c_str()) < 0) || (atoi(data.c_str()) > 15)){
-                    //check if channel is out of array index
-                    if(DEBUG) pc.printf("ERROR: INDEX OUT OF RANGE! \r\n", rxBuf);
+    switch (pRxPktHdr->cmd_type)
+    {
+        case SET_TEMPERATURE:
+            // Process set temp for specified channel
+            {
+                SET_TEMPERATURE_CMD *pRxPkt = (SET_TEMPERATURE_CMD *)(rxBuf);
+#if 1 //def DEBUG
+                pc.printf("DBG: ch = %02x\n", pRxPkt->chanID);
+                pc.printf("DBG: tempSet = %f\n", pRxPkt->setTemp);
+                pc.printf("DBG: chanStat = %02x\n", pRxPkt->chanStat);
+#endif
+                if ((pRxPkt->tempDelim != DELIMETER) || (pRxPkt->chanStatDelim != DELIMETER)) {
+                    // Send NAK back
+                    pc.printf("DBG: Error\n");
                 }
-                else{
-                    chnl = atoi(data.c_str());
-                    chnl = chnl-1;  //fix for array indexing
-                    chnlSel = chnl; //chnl selected by user in GUI
+                else {
+                    chanSel_SetTemp = pRxPkt->chanID;
+                    chnlStatus[pRxPkt->chanID].status = pRxPkt->chanStat;
+                    chnlStatus[pRxPkt->chanID].setTemp = pRxPkt->setTemp;
+                    newTempSet = true;
                 }
             }
-            else if(pCount == 2){ //get channel temperature
-                chnlStatus[chnl].setTemp = atoi(data.c_str());
-                if(DEBUG) pc.printf("CHANNEL TEMP: %f \r\n", chnlStatus[chnl].setTemp);
+            break;
+
+        case SELECT_CHANNEL:
+            // Select channel to send temp data to
+            {
+                SELECT_CHANNEL_CMD *pRxPkt = (SELECT_CHANNEL_CMD *)(rxBuf);
+
+                chanSel_SendTemp = pRxPkt->chanIDSel;
+#if 1 //def DEBUG
+                pc.printf("DBG: chanSel = %02x\n", pRxPkt->chanIDSel);
+                pc.printf("DBG: chanStat = %02x\n", pRxPkt->chanStat);
+#endif
             }
-            else if(pCount == 3){ //get channel status
-                //IF CHANNEL IS TURNED OFF, TURN THE STATUS OFF FIRST!  
-                chnlStatus[chnl].status = atoi(data.c_str());
-                if(chnlStatus[chnl].status == 0) turnOffChannel(chnl);
-                if(DEBUG) pc.printf("CHANNEL STATUS: %f \r\n", chnlStatus[chnl].status);
-            } 
-            data = "";  
-        }
-        i++;
+            break;
+
+        default:
+            // Error
+            break;
     }
 }
 
@@ -411,7 +513,8 @@
         io_control.writeOutput(0,0,1,0);
     }
     else{
-        io_control.writeOutput(0,0,0,1);
+        //turn valve on too
+        io_control.writeOutput(1,0,0,1);
     }
 }
 
@@ -448,8 +551,8 @@
     wait(0.1);
     get_temp(chn, BACK_THERM);
     wait(0.1);
-    //get_temp(chn, VALV_FET_AMP);
-    //wait(0.1);
+    get_temp(chn, VALVE_FET_AMP);
+    wait(0.1);
     //if(DEBUG1) pc.printf("TEMPERATURE READING: %f \r\n", get_temp(chn));
 }
 
@@ -499,6 +602,28 @@
     }    
 }
 
+//***************************************************************
+// Build packet with temperature readings to send to GUI
+//***************************************************************
+void sendTempReadings (int chan, float currentTemp)
+{
+    RESPONSE_CMD response;
+    unsigned char *ptr = (unsigned char *)&response;
+    int i;
+
+    response.SOF_flag = TX_SOF;
+    response.cmd_type = CMD_DATA;
+    response.len = 9;
+    response.Delim = DELIMETER;
+    response.data = (float)currentTemp;
+    response.EOF_flag = TX_EOF;
+
+    // Send response to GUI
+    for (i=0; i < response.len; i++, ptr++)
+        pc.printf("%02x", *ptr);
+    pc.printf("\n");
+}
+
 
 
 /*************************************************************/
@@ -508,50 +633,70 @@
 
 int main() {
     
-    //pc.baud(9600);
-    //pc.autoDetectChar('E');
-    //pc.attach(&rxInterrupt, MODSERIAL::RxAutoDetect);
+     Timer t;
+
+    // Setup serial port
+    // Look for RX_EOF
+    pc.baud(9600);
+    pc.autoDetectChar(RX_EOF);
+    pc.attach(&rxInterrupt, MODSERIAL::RxAutoDetect);
+
+    myled = 1;
+    rLed = 0;
+    gLed = 1;
     
-    myled = 1;
-    
-    //FRONT_THERM, BACK_THERM, HEAT_FET_AMP, VALV_FET_AMP
-    
+    t.start();
     
     while(1) {
-        //test_all_IO();
         if(DEBUG3) pc.printf("THE PROGRAM STARTED \r\n");
         
-        //check if we recieved data/need to update TCTF data
-        if(dataRecieved){
-            dataRecieved = false;
-            pc.autoDetectChar('\n');
-            pc.move(rxBuf, 50);
-            pc.rxBufferFlush();
-            parseRXData();
-        }
-        
         for(int chnl = 0; chnl < CHN_COUNT; chnl++){
             float currentTempFront = get_temp(chnl, FRONT_THERM);
             float currentTempBack = get_temp(chnl, BACK_THERM);
             float valveCurrent = get_valve_current(chnl, VALVE_FET_AMP);
             float heaterCurrent = get_heater_current(chnl, HEAT_FET_AMP);
-            float currentTemp = (currentTempFront + currentTempBack)/2;
+            float currentTemp = currentTempFront;
+            if(currentTempFront >=  currentTempBack){
+                currentTemp = currentTempFront;
+            }
+            else{
+                currentTemp = currentTempBack;
+            }    
+                
+            //float currentTemp = (currentTempFront + currentTempBack)/2;
+            
+            //check if we received data/need to update TCTF data
+            if(dataReceived){
+                dataReceived = false;
+                //pc.printf("DBG: %d bytes Rx'd\n", pc.rxBufferGetCount());
+                pc.move(rxBuf, 50);
+                parseRXData();
+                pc.rxBufferFlush();
+
+            }
+            
+            if (chnl == chanSel_SendTemp){
+                // Send temp readings for selected chan to GUI
+                sendTempReadings(currChan, currentTemp);
+            }
             
             //CONTROL LOOP:
             if(chnlStatus[chnl].status == 1){
                 if(DEBUG3) pc.printf("TEMP: %f \r\n", currentTempFront);
 
                 //Error check on fixture
-                error_check(chnl, currentTempFront, currentTempBack, valveCurrent, heaterCurrent);
-                
+                //error_check(chnl, currentTempFront, currentTempBack, valveCurrent, heaterCurrent);
+                if((currentTempFront >= 70) || (currentTempBack >= 70)){
+                    status_led(chnl, STATUS_BAD);        
+                }
 
                 if(chnlStatus[chnl].error == 0){
-                    if((currentTemp > ((chnlStatus[chnl].setTemp)+HYST))){
+                    if((currentTemp > ((chnlStatus[chnl].setTemp)+HYST_HIGH))){
                         if(DEBUG3) pc.printf("CHILLER ON \r\n");
                         //Turn chiller on
                         turn_valve_on(chnl); 
                     }
-                    else if (currentTemp < ((chnlStatus[chnl].setTemp)-HYST)){
+                    else if (currentTemp < ((chnlStatus[chnl].setTemp)-HYST_LOW)){
                         if(DEBUG3) pc.printf("HEATER ON \r\n");
                         //Turn heater on
                         turn_heater_on(chnl);