Lets say I have this as my HTML page
<form method="get" action="/leds.cgi">
<input value="1" name="led" type="checkbox">LED1<br>
<input value="2" name="led" type="checkbox">LED2<br>
<br>
<p>text for tag1: <!--#tag1--></p>
<p>text for tag2: <!--#tag2--></p>
<input value="Send" type="submit"> </form>
and my CGI handler looks like this:
/**** CGI handler for controlling the LEDs ****/
// the function pointer for a CGI script handler is defined in httpd.h as tCGIHandler
const char * LedCGIhandler(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
{
uint32_t i=0;
// index of the CGI within the theCGItable array passed to http_set_cgi_handlers
// Given how this example is structured, this may be a redundant check.
// Here there is only one handler iIndex == 0
if (iIndex == 0)
{
HAL_GPIO_WritePin(LD3_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
HAL_GPIO_WritePin(LD3_GPIO_Port, LD3_Pin, GPIO_PIN_RESET);
// Check the cgi parameters, e.g., GET /leds.cgi?led=1&led=2
for (i=0; i<iNumParams; i++)
{
//if pcParmeter contains "led", then one of the LED check boxes has been set on
if (strcmp(pcParam[i], "led") == 0)
{
//see if checkbox for LED 1 has been set
if(strcmp(pcValue[i], "1") == 0)
{
// switch led 1 ON if 1
HAL_GPIO_WritePin(LD3_GPIO_Port, LD2_Pin, GPIO_PIN_SET);
pcValue[i] = "1";
}
//see if checkbox for LED 2 has been set
else if(strcmp(pcValue[i], "2") == 0)
{
// switch led 2 ON if 2
HAL_GPIO_WritePin(LD3_GPIO_Port, LD3_Pin, GPIO_PIN_SET);
}
} //if
} //for
} //if
//uniform resource identifier to send after CGI call, i.e., path and filename of theresponse
pcValue[1] = "1";
return "/index.shtml";
}
When the user selects the checkbox for an led I want to have it remain selected to indicate that it is on. That's where I am having the issues. Any insight would be greatly appreciated.
