Revision 0:c8dd8b2c6942, committed 2015-11-12

Comitter:

mbedDevLondon

Date:

Thu Nov 12 19:17:47 2015 +0000

Commit message:

Converted to FRDM board

Changed in this revision

diff -r 000000000000 -r c8dd8b2c6942 Parser.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Parser.cpp	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,94 @@
+#include "./Parser.h"
+#include <string.h>
+#include <stdio.h>
+
+ char *commandTokens[20];
+ char invalidMessage[]     = "INVALID NEMA SENTENCE";
+ char endOfTokensMessage[] =  "END OF TOKENS";
+ 
+char validateCommandSentence(char *pSentence)
+{
+    char chkSumToken[3];
+    unsigned char calculatedChecksum = 0;
+    char errorCode = NOERROR;
+    printf("\n\r\n\r>>>>>>>>>>>> %s <<<<\n\n\n\r", pSentence);
+    if(*pSentence != '$')
+        {
+        printf("error no $\n\r");
+        return ERROR;
+        }
+    pSentence++;
+    
+    while (*pSentence != '\0' && *pSentence != '*') {
+        calculatedChecksum ^= *pSentence;
+        pSentence++;
+    }
+    
+    if(*pSentence == '*'){
+        sprintf(chkSumToken, "%02x", calculatedChecksum);
+        printf("Calc chksum %s<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n\r", chkSumToken);
+        pSentence++;
+        if(strcmp(pSentence, chkSumToken) != 0)
+            {
+            printf("checksum error>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
+            errorCode = ERROR;
+            }
+        }
+    else {
+        printf("error:***** %s\n\r",pSentence);
+        errorCode = ERROR;
+        }
+   
+    printf("<<<<< errorcode %d\n\r", errorCode);
+    return errorCode;
+}
+
+// parseCommandSentence() requires that the trailing <cr><lf> characters
+// be removed prior to calling this function. Failing to do so will cause
+// validateNemaSentence() to report an ERROR
+
+void parseCommandSentence( char *pBuffer)
+{
+    if (validateCommandSentence(pBuffer) == ERROR) {
+        commandTokens[0]= invalidMessage;
+        commandTokens[1]= endOfTokensMessage;
+        }
+    else{
+        //so valid sentence ...................................
+        int tokenCounter = 0;
+        
+        commandTokens[tokenCounter]=pBuffer;
+        pBuffer++;
+        tokenCounter++;
+        
+        while( *pBuffer != '\0'){
+            //until the end of sentence is found,
+            //search for comma deliminators
+            if(*pBuffer == ','){
+                //found end of token
+                *pBuffer = '\0';    //replace deliminator with a null character
+                
+                pBuffer++;          // save address of next token
+                commandTokens[tokenCounter]=pBuffer;               
+                tokenCounter++;
+                }
+            else pBuffer++;
+            }//eo while not end of string
+        commandTokens[tokenCounter] = endOfTokensMessage;
+      
+        }//eo Valid sentence:::::::::::::::::::::::::::::::::::::
+    
+}//eo parseNemaSentence( char *pBuffer) ========================================
+
+
+//calculate a XOR checksum for a string
+char calcChecksum(char *pSentence)
+{
+    unsigned char calculatedChecksum = 0;
+    
+    while (*pSentence != '\0' ) {
+        calculatedChecksum ^= *pSentence;
+        pSentence++;
+    }
+    return calculatedChecksum;
+}

diff -r 000000000000 -r c8dd8b2c6942 Parser.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Parser.h	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,15 @@
+#ifndef PARSER_H
+#define PARSER_H
+
+#define ERROR   1
+#define NOERROR 0
+
+extern char *commandTokens[20];
+
+char validateCommandSentence(char *pSentence);
+void parseCommandSentence( char *pBuffer);
+char calcChecksum(char *pSentence);
+
+
+
+#endif
\ No newline at end of file

diff -r 000000000000 -r c8dd8b2c6942 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,201 @@
+#include "mbed.h"
+
+#include "./Parser.h"
+#include "./terminal.h"
+
+#define DEBUG_CMD_PROCESS
+
+#define LED_ON   1
+#define LED_OFF  0
+DigitalOut AlarmLED(LED1);
+
+
+#define RXBUFFERSIZE    128
+#define RXBUFFERMASK    0x7F
+char receiveBuffer[RXBUFFERSIZE];
+unsigned char insertPointRxBuffer;
+
+Serial pc(USBTX, USBRX);            // tx, rx 
+void characterReceivedFromPC();
+char globalStartofSentence;
+bool globalSentenceFromPCReady;
+//extern    char *commandTokens[20];
+
+
+
+
+// initializeRingBufferAndTokenArray: -----------------------------------------
+//
+//
+//-----------------------------------------------------------------------------
+void initializeRingBufferAndTokenArray()
+{
+    insertPointRxBuffer = 0;
+    globalStartofSentence = 0;
+
+    globalSentenceFromPCReady = false;
+
+    //make sure the array is full of address 0x000's
+    for (int i = 0; i< 20; i++) {
+        commandTokens[i] = NULL;
+        }
+}//eo initializeRingBufferAndTokenArray:: =====================================
+
+
+
+
+// initializeSystem: ----------------------------------------------------------
+//
+//
+//-----------------------------------------------------------------------------
+
+void initializeSystem(void)
+{
+//    lcd.printf("Hi Brad\n");
+//    lcd.locate(0,1);
+//    lcd.printf("row 2\n");
+ 
+    initializeRingBufferAndTokenArray();
+    initializePCTerminal(&pc);
+    clearScreen();
+    
+    locateCursor(0, 2);
+    drawBox(30, 10);
+    pc.attach(characterReceivedFromPC);  // set calback function to be called when a character is received
+    
+    AlarmLED = LED_ON;
+    wait(0.2);  //wait .2 seconds
+    AlarmLED = LED_OFF;
+    wait(0.2);  //wait .2 seconds
+    AlarmLED = LED_ON;
+    wait(0.2);  //wait .2 seconds
+    AlarmLED = LED_OFF;
+}//eo initializeSystem:: ======================================================
+
+
+
+
+// characterReceivedFromPC: ---------------------------------------------------
+//
+//
+//-----------------------------------------------------------------------------
+
+void characterReceivedFromPC()
+{
+    static unsigned char StartofNextSentence = 0;
+    while(pc.readable()) 
+        {
+        receiveBuffer[insertPointRxBuffer] = pc.getc();
+        if( receiveBuffer[insertPointRxBuffer] == '$' )
+            {
+            StartofNextSentence = insertPointRxBuffer;
+            }
+        if( receiveBuffer[insertPointRxBuffer] == '\r' ) 
+            {
+            receiveBuffer[insertPointRxBuffer] = '\0';
+
+            //makeSentence available to main loop
+            globalStartofSentence = StartofNextSentence;
+            globalSentenceFromPCReady = true;
+            printf("\n\rsentence rec %s\n\r", &receiveBuffer[StartofNextSentence]);
+            }
+        insertPointRxBuffer = (insertPointRxBuffer + 1) & RXBUFFERMASK;
+        }
+}//eo characterReceivedFromPC:: ===============================================
+
+
+
+// processCommandMessage: -----------------------------------------------------
+// transfer one sentence from incoming receive buffer into a command buffer for parsing
+//
+// 
+//-----------------------------------------------------------------------------
+
+void processCommandMessage()
+{
+    unsigned char fp = globalStartofSentence;  // initalize fetch point from receive buffer
+    unsigned char ip = 0;                // initilize insert point into command buffer
+    
+    // copy the sentence (which contains a command) from the ring buffer (named receiveBuffer) 
+    // into a normal linear array named commandBuffer
+    char commandBuffer[60];
+    #ifdef DEBUG_CMD_PROCESS
+    printf("\n\r^^Start of sentence:%d\n\r",  fp);
+    #endif
+    while(receiveBuffer[fp] != '\0') 
+        {
+        #ifdef DEBUG_CMD_PROCESS
+        if(pc.writeable()) pc.putc(receiveBuffer[fp]);
+        #endif
+        commandBuffer[ip] = receiveBuffer[fp];
+        ip++;
+        fp = (fp+1) & RXBUFFERMASK;
+        }
+    commandBuffer[ip] = '\0';
+    
+    parseCommandSentence(commandBuffer);
+
+    #ifdef DEBUG_CMD_PROCESS
+    // print out the tokens back to the terminal
+    {
+    int  i = 0;  
+    while (strcmp(commandTokens[i],"END OF TOKENS" )) {
+        pc.printf("$token %i: %s\n\r",i, commandTokens[i]);
+        i++;     
+        }
+    }
+    #endif
+        
+    if(strcmp(commandTokens[0],"$ST" )== 0) 
+        {
+        long newtime = atol(commandTokens[1]); 
+        #ifdef DEBUG_CMD_PROCESS
+        pc.printf("Setting time to: %l \n\r ", newtime);
+        #endif
+        set_time( newtime); 
+        //int limitValue = atoi(commandTokens[3]);
+        //if( *commandTokens[2] == 'U') setUpperLimitForChannel(channel, limitValue);   
+        //if( *commandTokens[2] == 'L') setLowerLimitForChannel(channel, limitValue);                
+        }
+}//eo processCommandMessage:: =================================================
+
+
+
+// main: ----------------------------------------------------------------------
+//
+//
+//-----------------------------------------------------------------------------
+
+int main() {
+     set_time(1256729737);
+    initializeSystem();
+    
+    while(1) 
+        {//so infinite loop ...................................................
+        if( globalSentenceFromPCReady == true ) 
+            {
+            processCommandMessage();
+            globalSentenceFromPCReady = false;
+            }
+        
+        time_t seconds = time(NULL);
+        
+        printf("Time as seconds since January 1, 1970 = %d\n", seconds);
+        
+        printf("Time as a basic string = %s", ctime(&seconds));
+ 
+        char buffer[32];
+        strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
+        printf("Time as a custom formatted string = %s", buffer);
+        
+        
+       
+        AlarmLED = LED_OFF;
+        wait(10);
+        AlarmLED = LED_ON;
+        wait(1);
+        }//eo infinite loop :::::::::::::::::::::::::::::::::::::::::::::::::::
+        
+}//eo main ====================================================================
+
+ 
\ No newline at end of file

diff -r 000000000000 -r c8dd8b2c6942 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9ad691361fac
\ No newline at end of file

diff -r 000000000000 -r c8dd8b2c6942 terminal.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/terminal.cpp	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,64 @@
+#include "mbed.h"
+#include "terminal.h"
+
+Serial *pPCTerminal;
+void initializePCTerminal(Serial *p)
+{
+    pPCTerminal = p;
+}
+
+
+void clearScreen() 
+{
+    pPCTerminal->printf("\033[2J");
+}
+
+void locateCursor(int column, int row) 
+{
+    // Cursor Home    <ESC>[{ROW};{COLUMN}H
+    pPCTerminal->printf("\033[%d;%dH", row + 1, column + 1);
+}
+
+int rgb888tobgr111(int colour) 
+{
+    int r = (colour >> 23) & 1;
+    int g = (colour >> 15) & 1;
+    int b = (colour >> 7) & 1;
+    return (b << 2) | (g << 1) | (r << 0);
+}
+
+void setForeground(int colour) 
+{
+    // Set Attribute Mode    <ESC>[{n}m
+    // Foreground Colours : 30 + bgr
+    int c = 30 + rgb888tobgr111(colour);
+    pPCTerminal->printf("\033[%dm", c);
+}
+
+void setbBackground(int colour) 
+{
+    // Set Attribute Mode    <ESC>[{n}m
+    // Background Colours : 40 + bgr
+    int c = 40 + rgb888tobgr111(colour);
+    pPCTerminal->printf("\033[%dm", c);
+}
+
+void drawBox(int width, int height)
+{
+    pPCTerminal->printf("\0154");
+    for(int i = 1; i < (width - 2); i++)pPCTerminal->printf("%c",157);
+    pPCTerminal->printf("\0153 \n\r");
+    
+    for(int row = 1; row < (height - 2); row++)
+        { 
+        pPCTerminal->printf("\0170");
+        for(int i = 1; i < (width - 2); i++)pPCTerminal->printf(" ");
+        pPCTerminal->printf("\0170\n\r");
+        }
+   
+    
+    pPCTerminal->printf("\0155");
+    for(int i = 1; i < (width - 2); i++)pPCTerminal->printf("\0163");
+    pPCTerminal->printf("\052");
+
+}
\ No newline at end of file

diff -r 000000000000 -r c8dd8b2c6942 terminal.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/terminal.h	Thu Nov 12 19:17:47 2015 +0000
@@ -0,0 +1,12 @@
+#ifndef TERMINAL_H
+#define TERMINAL
+
+void initializePCTerminal(Serial *p);
+void clearScreen();
+void locateCursor(int column, int row);
+int rgb888tobgr111(int colour);
+void setForeground(int colour);
+void setbBackground(int colour) ;
+
+void drawBox(int width, int height);
+#endif
\ No newline at end of file