Web Page Macro

• WORD cmdGetTag(GETTAG_INFO* pGetTagInfo)
• {
• -
• - Detects various predefined macro tags
• - followed by a 2 digit tag number
• -
• else if (tagGroup == VARGROUP_ANALOG)
• {
• - perform A/D measurement on input
• - corresponding to tag number
• - return that array element
• }
• }

• In websrv65_v310/src/cmd.c
• The Modtronix server can substitute various macros embedded within web pages with variables. It already has support for a macro to be replaced with an element of the AdcValues[array].

• REPLACE the entire conditional branch body

• {
• if (tagVal < ADC_CHANNELS)
• pGetTagInfo->ref = cmdGetWordVar(ref, pGetTagInfo->val, AdcValues[tagVal]);
• return 1; //One byte was written
• }

• In our system, all the AdcValues[array] are perpetually updated by ISR
• We don’t have to perform a measurement when an analog variable group tag is encountered
• … Simply return the array element pointed to by the tag number

• %n00
• macro to be replaced with AdcValues[0]
• %n04
• macro to be replaced with AdcValues[4]