ELZET80
demonstration software for mbedRail24v board (mbed LPC1768)
Dependencies: EthernetInterface Tiny-HTTPD mbed-rtos mbed
Diff: demo.cpp
- Revision:
- 0:7b5e68d593c6
- Child:
- 1:d4107c3853a6
diff -r 000000000000 -r 7b5e68d593c6 demo.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/demo.cpp Fri Aug 01 10:04:07 2014 +0000
@@ -0,0 +1,864 @@
+/*---------------------------------------------------------------------------*
+ * mbed RAIL24V demo application
+ *---------------------------------------------------------------------------*
+ * Description:
+ * This program should demonstrate some features of the mbed RAIL24V Board
+ * and help to write own web applications for the LPC1768 mbed board.
+ *
+ * Features:
+ * * Webserver listening on port 80 with io port handling
+ * * RS232/RS485 echo
+ * * examples for interrupt and thread handling
+ *
+ * Debugging:
+ * * via "embedded" mbed USB->Serial Port (9600 Baud)
+ *---------------------------------------------------------------------------*/
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "HTTPD.h"
+
+
+#define debug //enable debug output on virtual usb->com port
+#define dhcp_disable //use user defined ip-address
+
+/*----------------------------------------------------------------------------
+ * constants
+ *---------------------------------------------------------------------------*/
+
+/*content and length of "/dynamic/Elogo.gif"*/
+const char* const elogo_gif = 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+const int elogo_gif_len = 1686;
+/*content and length of "/dynamic/bg.gif"*/
+const char* const bg_gif = 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+const int bg_gif_len = 1518;
+/*content and lenght of "/dynamic/favicon.ico"*/
+const char* const favicon_ico = "\x00\x00\x01\x00\x01\x00\x10\x10\x10\x00\x01\x00\x04\x00\x28\x01\x00\x00\x16\x00\x00\x00\x28\x00\x00\x00\x10\x00\x00\x00\x20\x00\x00\x00\x01\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xC8\x77\x31\x00\x9E\xBF\x39\x00\xEF\x9E\x58\x00\xFC\xA7\x52\x00\xFF\xA4\x54\x00\xFF\xF4\xC2\x00\xFF\xFF\xFF\x00\xC0\xC0\xC0\x00\x00\x00\xFF\x00\x00\xFF\x00\x00\x00\xFF\xFF\x00\xFF\x00\x00\x00\xFF\x00\xFF\x00\xFF\xFF\x00\x00\xFF\xFF\xFF\x00\x11\x72\x72\x72\x72\x72\x71\x10\x17\x72\x72\x72\x72\x72\x77\x10\x77\x72\x72\x72\x72\x72\x77\x70\x22\x77\x77\x77\x77\x77\x22\x20\x77\x77\x61\x64\x11\x77\x77\x70\x22\x77\x17\x53\x71\x77\x22\x20\x77\x77\x16\x53\x71\x77\x77\x70\x22\x77\x11\x53\x71\x77\x22\x20\x77\x77\x17\x53\x71\x77\x77\x70\x11\x77\x61\x64\x11\x77\x11\x10\x11\x11\x11\x11\x11\x11\x11\x10\x17\x71\x76\x77\x17\x71\x71\x10\x17\x11\x71\x71\x17\x11\x71\x10\x17\x61\x71\x16\x17\x61\x71\x10\x17\x71\x71\x77\x17\x77\x77\x10\x11\x11\x11\x11\x11\x11\x11\x10\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04\x00\x01\xF3\x04";
+const int favicon_ico_len = 318;
+
+/*content of "/dynamic/Cstyle.css"*/
+const char* const static_css =
+"/* Main Style sheet for the ELZET80 */"
+"body{font: 100% Arial,Helvetica,sans-serif; text-align: center; margin: 0; background: #FFF; color: #000;}"
+"#container{width: 100%;}"
+"#header{clear: both; width: 80%; min-width: 500px; margin: 0 auto; height:130px; padding: 10px 0 0; color:#999;}"
+"#main-outer{float: left; clear: both; width: 100%;background: #FFF url(/dynamic/bg.gif) repeat-x;}"
+"#main{clear: both; width: 90%; min-width: 500px; margin: 0 auto; text-align: left; padding: 0 10px;}"
+"#footer{width: 100%; background: #BBB; clear:both; font-size: 10pt; color: #555;}"
+"img{border: none;}"
+".left{float: left;}"
+".right{float: right;}"
+".left-align{text-align: left;}"
+".right-align{text-align: right;}"
+".center-align{text-align: center;}"
+".lf{clear: both; margin: 0; padding: 5px 0;}"
+".block1{float: left; display: block; width: 225px; padding: 0 10px; margin: 0 0 10px;}"
+".block2{float: left; display: block; width: 470px; padding: 0 10px; margin: 0 0 10px;}"
+".block100{float: left; display: block; width: 98%; padding: 0 1%; margin: 0 0 10px;}"
+".max750{max-width: 750px;}"
+".max850{max-width: 850px;}"
+".form-table{width: 100%; border: 1px solid #AAA; margin: 5px 0 0; text-align: left; border-collapse: collapse;}"
+".form-table tr td, .form-table tr th{padding: 5px;}"
+".margin-top-10{margin-top: 10px;}"
+".no-border{border: none;}"
+".border-td tr td, .border-td tr th{border: 1px solid #AAA;}"
+"legend{font-weight: bold;}"
+"#header #logo{float: left; display: block;}"
+"#header #title{font-size: 18pt; float: left; margin: 15px 0 0 20px; display: block;}"
+"#header #text{float: right; text-align: left; display: block;}"
+"#menu-block{float: left; display: block; }"
+"#home-page-img img{float: right; display: block; max-width: 300px;}"
+"#main h1{float: left; clear: both; color: #FFF;}"
+"#main h2{float: left; clear: both; color: #FFF; margin: -10px 0 10px; padding: 0;}"
+"#menu{margin: 0;}"
+"ul li{list-style-type: circle; padding: 3px;}"
+"#footer p {margin: 0; padding: 10px 0 10px 15px;}"
+"#footer a {color:#009898;}"
+".io-user-outputs td{text-align: center; font-weight: bold; font-size: 26px; padding: 5px 0; cursor: hand;}"
+".io-user-outputs td:hover{background: #CCC;}";
+
+
+/*header-part of the dynamically generated analog-input website*/
+const char* const analog_header =
+ "<html xmlns=\"http://www.w3.org/1999/xhtml\">"
+ "<head>"
+ "<title>Welcome to mbed\'s Web Page!</title>"
+ "<meta http-equiv=\"Content-Type\"content=\"no-cache\"content=\"text/html; charset=ISO-8859-1\" />"
+ "<link rel=\"shortcut icon\" href=\"/dynamic/favicon.ico\" />\n"
+ "<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"/dynamic/Cstyle.css\" />\n"
+ "</head>"
+ "<body>"
+ "<div id=\"container\">"
+ "<div id=\"header\">"
+ "<div id=\"logo\"><a href=/index.htm><img src=\"/dynamic/Elogo.gif\" alt=\"ELZET80\" title=\"Go to home page\" /></a></div>"
+ "<div id=\"title\">Welcome Elzet 80 mbedRail24v Demo</div>"
+ "<div id=\"text\">"
+ "<p>Running ELZET80 mbed demo</p>"
+ "</div>"
+ "</div>"
+ "<div id=\"main-outer\">"
+ "<div id=\"main\">";
+
+/*header-part of the dynamic generated io website*/
+const char* const io_header =
+ "<html xmlns=\"http://www.w3.org/1999/xhtml\">"
+ "<head>"
+ "<title>Welcome to mbed\'s Web Page!</title>"
+ "<meta http-equiv=\"Content-Type\"content=\"no-cache\"content=\"text/html; charset=ISO-8859-1\" />"
+ "<link rel=\"shortcut icon\" href=\"/dynamic/favicon.ico\" />\n"
+ "<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"/dynamic/Cstyle.css\" />\n"
+ "<script type=\"text/javascript\">\n"
+ "function key(id){\n"
+ "var out=\"io.htm?o\"+id;location.href=out}\n"
+ "</script>\n"
+ "</head>"
+ "<body>"
+ "<div id=\"container\">"
+ "<div id=\"header\">"
+ "<div id=\"logo\"><a href=/index.htm><img src=\"/dynamic/Elogo.gif\" alt=\"ELZET80\" title=\"Go to home page\" /></a></div>"
+ "<div id=\"title\">Welcome Elzet 80 mbedRail24v Demo</div>"
+ "<div id=\"text\">"
+ "<p>Running ELZET80 mbed demo</p>"
+ "</div>"
+ "</div>"
+ "<div id=\"main-outer\">"
+ "<div id=\"main\">";
+
+/*footer of the dynamic generatred analog and io webpages*/
+const char* const io_footer=
+ "</div>"
+ "</div>"
+ "</div>"
+ "<div id=\"footer\">"
+ "<p>© 2012 ELZET80 Mikrocomputer GmbH&Co. KG • Aachen • <a href=\"http://www.elzet80.de\">www.elzet80.de</a></p>"
+ "</div>"
+ "</div>"
+ "</body>"
+ "</html>";
+
+/*content of index.html*/
+const char* const index_html =
+ "<html xmlns=\"http://www.w3.org/1999/xhtml\">\r\n"
+ "<head>\r\n"
+ "<title>Welcome to mbed\'s Web Page!</title>\r\n"
+ "<meta http-equiv=\"Content-Type\"content=\"no-cache\"content=\"text/html; charset=ISO-8859-1\" />\r\n"
+ "<link rel=\"shortcut icon\" href=\"/dynamic/favicon.ico\" />\r\n"
+ "<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" href=\"/dynamic/Cstyle.css\" />\r\n"
+ "</head>\r\n"
+ "<body>\r\n"
+ "\r\n"
+ "<div id=\"container\">\r\n"
+ "\r\n"
+ "<div id=\"header\">\r\n"
+ "<div id=\"logo\"><img src=\"/dynamic/Elogo.gif\" alt=\"ELZET80\" title=\"Home page\" /></div>\r\n"
+ "<div id=\"title\">Welcome Elzet 80 mbedRail24v Demo</div>\r\n"
+ "<div id=\"text\">\r\n"
+ "<p>Running ELZET80 mbed demo</p>\r\n"
+ "</div>\r\n"
+ "</div>\r\n"
+ "\r\n"
+ "<div id=\"main-outer\">\r\n"
+ "<div id=\"main\">\r\n"
+ "<h1>Main menu </h1>\r\n"
+ "<div class=\"lf\">\r\n"
+ "<div id=\"menu-block\">\r\n"
+ "<ul id=\"menu\">\r\n"
+ "<li><a href=\"/dynamic/io.htm\">Digital I/O Page</a></li>\r\n"
+ "<li><a href=\"/dynamic/analog.htm\">Analog Input Page</a></li>\r\n"
+ "</ul>\r\n"
+ "</br>\r\n"
+ "</div>\r\n"
+ "</div>\r\n"
+ "</div>\r\n"
+ "</div>\r\n"
+ "\r\n"
+ "<div id=\"footer\">\r\n"
+ "<p>© 2012 ELZET80 Mikrocomputer GmbH&Co. KG • Aachen • <a href=\"http://www.elzet80.de\">www.elzet80.de</a></p>\r\n"
+ "</div>\r\n"
+ "\r\n"
+ "</div>\r\n"
+ "\r\n"
+ "</body>\r\n"
+ "</html>";
+
+/*definition of constants for hardware abstraction (enables compatibility to "ELZET80 kbed uTasker Platform")*/
+const char ASCII_out = '0'; // 0-9 for output ports
+const char ASCII_in = 'a'; // a-f for input ports
+const char ASCII_analog = '0'; // 0-9 for analog input
+
+
+
+/*----------------------------------------------------------------------------
+ * io functions
+ *---------------------------------------------------------------------------*/
+
+/*assign mbed Rail24V io-ports to LPC1768 io ports*/
+
+/*ASCII-characters are only relevant for use with http handling routines*/
+DigitalOut out1(p23, 1); //Output 1 --> ASCII "1"
+DigitalOut out2(p24, 1); //Output 2 --> ASCII "2"
+DigitalOut out3(p25, 1); //Output 3 --> ASCII "3"
+DigitalOut out4(p26, 1); //Output 4 --> ASCII "4"
+DigitalOut relay1(p22, 0); //Relais --> ASCII "5"
+DigitalOut led1(LED1, 0); //MBED led1 - activated in "boot sequence" // blink: led1 (by timer-interrupt ticker)
+DigitalOut led2(LED2, 0); //MBED led2 - activated in "boot sequence" // blink: led2 (by led2_thread)
+DigitalOut led3(LED3, 0); //Mbed led3
+DigitalOut led4(LED4, 0); //MBED led4
+DigitalIn in1(p19); //Input 1 --> ASCII "a"
+DigitalIn in2(p20); //Input 2 --> ASCII "b"
+DigitalIn in3(p11); //Input 3 --> ASCII "c"
+DigitalIn in4(p12); //Input 4 --> ASCII "d"
+AnalogIn ain1(p15); //Analog Input 1 --> ASCII "1"
+AnalogIn ain2(p16); //Analog Input 2 --> ASCII "2"
+AnalogIn ain3(p17); //Analog Input 3 --> ASCII "3"
+AnalogIn ain4(p18); //Analog Input 4 --> ASCII "4"
+
+
+DigitalOut rs485_txmode(p21, 0); //RS485 - enable receiver (Port 21: 0 recieve mode / 1 transmit mode)
+
+//Serial interfaces
+//Pins UART
+//USBTX,USBRX 0
+//p13,p14 1
+//p28,p27 2
+//p9,p10 3
+
+RawSerial rs232(p9, p10); // tx, rx -- rawserial is used for compatibility with interrupt routines
+RawSerial rs485(p13, p14); // tx, rx
+
+
+LocalFileSystem local("local"); //initialize the local file system
+
+Ticker interruptTick; //create a timer
+
+/*httpd*/
+HTTPD *httpd; //initialize the httpd-webserver
+
+
+/*----------------------------------------------------------------------------
+ * functions
+ *---------------------------------------------------------------------------*/
+
+
+void index_website_handler (int id);
+void dynamic_website_handler (int id);
+
+void dynamic_IO_website(int id);
+void dynamic_analog_website(int id);
+
+int io_webhandler_action(char *input_buf, int input_puf_len);
+
+unsigned short read_adc(char port_name);
+int read_portval(char port_name);
+int write_portval(char port_name, int port_val);
+int toggle_port(char port_name);
+
+
+
+/*----------------------------------------------------------------------------
+ * interrupt and thread functions
+ *---------------------------------------------------------------------------*/
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: echoRS232 (interrupt)
+ *---------------------------------------------------------------------------*
+ * Description:
+ *
+ * Toggle LED3 to indicate RS232 activity.
+ * Read a char from the rs232 input port to a buffer and
+ * send the char to rs232 port.
+ *---------------------------------------------------------------------------*/
+void echoRS232() {
+ char rs232_buffer = 0; //local buffer
+
+ led3 = !led3; //toggle LED3
+
+ /*read rs232 buffer and write the result back to rs232 interface*/
+ if (rs232.readable()){ //avoid hanging up the program in case of multiple use of rs232
+
+ rs232_buffer = rs232.getc(); //read input to buffer
+
+ if (rs232.writeable()){
+ rs232.putc(rs232_buffer); //write buffer to rs232 output
+ }
+ }
+ return;
+}
+
+/*---------------------------------------------------------------------------*
+ * Routine: echoRS485 (interrupt)
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Toggle LED3 to indicate RS485 activity.
+ * Read a char from the RS485 input port to a buffer, switch RS485 port
+ * to transmission mode and send the buffered char to RS485 port.
+ *---------------------------------------------------------------------------*/
+void echoRS485() {
+ char rs485_buffer = 0; //local buffer
+
+ led3 = !led3; //toggle LED
+
+ rs485_txmode = 1; //enable RS485 transmission mode
+
+ //read rs485 inpuf buffer and write the result back to rs485 interfacee
+ if (rs485.readable()){
+
+ rs485_buffer = rs485.getc();
+
+ if (rs485.writeable()){
+ rs485.putc(rs485_buffer);
+ }
+ }
+}
+
+/*---------------------------------------------------------------------------*
+ * Routine: enableRS485receiver (interrupt)
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Disable RS485 transmission mode. (TxIRQ -> tx buffer empty)
+ *---------------------------------------------------------------------------*/
+void enableRS485receiver() {
+ rs485_txmode = 0; //disable RS485 transmission mode
+ }
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: interruptTickRoutine
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Toggle LED1.
+ *---------------------------------------------------------------------------*/
+void interruptTickRoutine() {
+ led1 = !led1;
+ return;
+}
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: led2_thread
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Example for a thread. Toggle LED2 and sleep 1000ms.
+ *---------------------------------------------------------------------------*/
+void led2_thread(void const *args) {
+ while (true) {
+ led2 = !led2;
+ Thread::wait(1000);
+ }
+}
+
+
+
+
+
+
+
+/*----------------------------------------------------------------------------
+ * main ()
+ *---------------------------------------------------------------------------*/
+int main() {
+
+ #if defined debug
+ printf("Welcome to ELZET80 mbed demo\r\n"); //print debug Informations to LPC1768 USB-Comport (9600 baud)
+ #endif
+
+ /*Example to write a file to the local filesystem:
+
+ FILE *fp = fopen("/local/helloworld.txt", "w"); // Open "helloworld.txt" on the local file system for writing
+ fprintf(fp, "Hello World!");
+ fclose(fp);
+ */
+
+ led1=1; //enable status led1
+
+ /*Ethernet initialisation - the demo would not start without an ethernet connection*/
+ EthernetInterface eth;
+
+ #if defined dhcp_disable
+ static const char* netIP = "192.168.17.73";
+ static const char* netMask = "255.255.255.0";
+ static const char* netGateway = "192.168.17.73";
+ eth.init(netIP,netMask,netGateway); //use userpecific IP, Netmask and Gateway
+ #else
+ eth.init(); //use DHCP client function
+ #endif
+
+ #if defined debug
+ printf("starting Ethernet Interface setup\r\n");
+ #endif
+
+ int ethError; //Ethernet error buffer
+
+ /*start ethernet connection*/
+ do{
+ ethError = eth.connect(5000); //connect to network with 5s (5000ms) timout
+ #if defined debug
+ if(ethError)printf("Error %d occurrenced \r\n", ethError);
+ #endif
+ wait(1);
+ }while(ethError != 0); //wait until a network connection was established
+
+
+ led2 = 1; //set status led2
+
+ #if defined debug
+ printf("\r\nEthernet Interface setup finished. IP: %s\r\n", eth.getIPAddress());
+ printf("enabling RS232/RS485 echo mode ... \r\n");
+ #endif
+
+
+ /*init serial ports*/
+ rs232.baud(9600); //set rs232 baudrate to 9600
+ rs232.printf("Enabled RS232 port - starting echo mode \r\n");
+ rs232.attach(&echoRS232,Serial::RxIrq); //attach the rs232 echo function to rs232 rx interrupt
+
+ rs485.attach(&enableRS485receiver,Serial::TxIrq); //enable automatic rx/tx switching (tx-buffer empty interrupt)
+ rs485_txmode = 1; //enable RS485 transmission mode
+ rs485.baud(9600); //set rs485 baudrate to 9600 baud
+ rs485.printf("Enabled RS485 port - starting echo mode \r\n");
+ rs485.attach(&echoRS485,Serial::RxIrq); //enable echo mode via RS485 echo routine
+
+
+ httpd = new HTTPD;
+ httpd->attach("/dynamic/", &dynamic_website_handler); //use the function "dynamic_website_handler" for handling the dynamic websites
+ //initialize all virtual directories before the root directory
+ httpd->attach("/flash/", "/local/"); //attach the flash storage ("local") to http://mbed.ip/flash/ -- currently the flash file system handler could not handle subdirectories!
+
+ httpd->attach("/", &index_website_handler); //index.html
+
+
+ httpd->start(80); //httpd on port 80
+
+
+ #if defined debug
+ printf("Webserver started.\r\n");
+ #endif
+
+
+ #if defined debug
+ printf("enabling Ticker for led1 and Thread for led2 \r\n");
+ #endif
+
+ interruptTick.attach(&interruptTickRoutine,0.5); //enabling Ticker for timer interrupt triggered subroutine (.5s periodic toggling of led1)
+
+
+ Thread led2Thread(led2_thread, NULL, osPriorityNormal, 1024 * 4); //create a separate thread
+
+ //endless loop - "httpd-thread"
+ while(1){
+ Thread::wait(5); //wait 5 ms
+
+
+ /*handle waiting http requests*/
+ /* the program waits here until a request was made and answered*/
+
+ httpd->poll(); //poll httpd for incoming requests
+
+ led3 = !led3; //toogle led3 (indicate that a http request was handled)
+
+ }
+}
+/* end of main() */
+
+
+
+
+
+/*----------------------------------------------------------------------------
+ * website handling functions
+ *---------------------------------------------------------------------------*/
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: dynamic_website_handler
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Website hander for handling requests of "http://mbed.ip/ *** ".
+ *
+ * Inputs:
+ * int id -- number of httpd web handler
+ * Outputs:
+ * none -- only output to web browser
+ *---------------------------------------------------------------------------*/
+void index_website_handler (int id) {
+ char input_buf[256]; //create an input buffer
+
+ strcpy(input_buf, httpd->getFilename(id)); //copy requested file name to buffer
+
+ #if defined debug
+ printf("index website handler -- handler-id:%d reqested file:%s\r\n", id, input_buf);
+ #endif
+
+ httpd->send(id, index_html, strlen(index_html), "Content-Type: text/html\r\n"); //transmit content of "index_html" to browser
+
+}
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: dynamic_website_handler
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Website hander for handling requests of "http://mbed.ip/dynamic/ *** ".
+ * Inputs:
+ * int id -- number of httpd web handler
+ * Outputs:
+ * "http" -- output to web browser
+ *---------------------------------------------------------------------------*/
+void dynamic_website_handler (int id) {
+ char input_buf[256]; //buffer for request parameters
+
+ strcpy(input_buf, httpd->getFilename(id)); //copy request to buffer
+
+ #if defined debug
+ printf("dynamic website handler -- handler-id:%d reqested file:%s\r\n", id, input_buf);
+ #endif
+
+ /*process the request*/
+ if(strcmp (input_buf, "Elogo.gif") == 0) {
+ httpd->send(id, elogo_gif, elogo_gif_len, "Content-Type: image/gif\r\n");
+ } else if(strcmp (input_buf, "bg.gif") == 0) {
+ httpd->send(id, bg_gif, bg_gif_len, "Content-Type: image/gif\r\n");
+ } else if(strcmp (input_buf, "Cstyle.css") == 0) {
+ httpd->send(id, static_css, strlen(static_css), "Content-Type: text/html\r\n");
+ } else if(strcmp (input_buf, "favicon.ico") == 0) {
+ httpd->send(id, favicon_ico, favicon_ico_len, "Content-Type: image/x-icon\r\n");
+ } else if (strcmp(input_buf, "io.htm") == 0){
+ dynamic_IO_website(id);
+ } else if(strcmp (input_buf, "analog.htm") == 0) {
+ dynamic_analog_website(id);
+ } else{
+ httpd->httpdError(id, 404);
+ }
+}
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: dynamic_analog_website
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Generation and handling of the dynamic website for digital ports.
+ * Inputs:
+ * int id -- number of httpd web handler
+ * Outputs:
+ * "http" -- output to web browser
+ *---------------------------------------------------------------------------*/
+void dynamic_IO_website(int id){
+ char out_buf[2000]; //buffer for website output (buffer size is minimized to max. required size)
+ char query_buf[256]; //buffer to store
+ char tempstring[32]; //buffer for small string construction
+ int counter = 0; //counter variable (multiple use)
+
+ strcpy(query_buf, httpd->getQueryString(id)); //copy transmitted parameters to query_buf
+ strcpy(out_buf, io_header); //initialize Website output
+
+ io_webhandler_action(query_buf, strlen(query_buf)); //handle transmitted parameters stored in query_buf
+
+
+ /*create website in buffer*/
+ strcat(out_buf,"<h1>View and Control Ports</h1><div class=\"lf\"><div class=\"block2\"><fieldset><legend>I/OPorts</legend>");
+
+ strcat(out_buf,"<table class=\"form-table border-td\"><tr><th colspan=\"5\" class=\"center-align\">Outputs</th></tr><tr class=\"center-align\"><td>OUT1</td><td>OUT2</td><td>OUT3</td><td>OUT4</td><td>RELAY</td></tr><tr class=\"center-align\">");
+
+ /*read status of output ports*/
+ for(counter = 1; counter <= 5; counter++){
+ strcat(out_buf,"<th style=\" background-color:");
+ if (read_portval(ASCII_out + char(counter))){
+ strcat(out_buf,"gold");
+ }else{
+ strcat(out_buf,"lime");
+ }
+ strcat(out_buf,"\" onclick=\"key(\'");
+ sprintf(tempstring,"%i\')\">O%i</th>",counter,counter);
+ strcat(out_buf,tempstring);
+ }
+
+ strcat(out_buf, "</tr> </table>");
+ strcat(out_buf, "<table class=\"form-table border-td\"><tr><th colspan=\"4\" class=\"center-align\">Inputs</th></tr><tr class=\"center-align\"> <td>IN1</td> <td>IN2</td><td>IN3</td><td>IN4</td></tr><tr class=\"center-align\">");
+
+ /*read input values*/
+ for(counter = 0; counter <= 3; counter++){ //read port 1-4 (mapped to a-d)
+ strcat(out_buf,"<th style=\" background-color:");
+ if (read_portval(ASCII_in + char(counter))){
+ strcat(out_buf,"gold");
+ }else{
+ strcat(out_buf,"lime");
+ }
+ sprintf(tempstring,"\">%i</th>",(counter+1)); //port 1-4 mapped to a-d
+ strcat(out_buf,tempstring);
+ }
+ strcat(out_buf,"</tr></table></div>");
+
+ strcat(out_buf, io_footer); //copy footer to buffer
+
+ #if defined debug
+ printf("io page html length: %i \r\n",strlen(out_buf));
+ #endif
+
+ httpd->send(id, out_buf, strlen(out_buf), "Content-Type: text/html\r\n"); //send the constructed website
+
+}
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: dynamic_analog_website
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Generation and handling of the dynamic website for analog ports.
+ * Inputs:
+ * int id -- httpd web handle
+ * Outputs:
+ * "http" -- only output to web browser
+ *---------------------------------------------------------------------------*/
+void dynamic_analog_website(int id){
+ char out_buf[2000]; //buffer for website output
+ char query_buf[256]; //buffer to store
+ char tempstring[32]; //buffer for small string construction
+ int counter = 0; //counter variable (multiple use)
+ unsigned short analog_buf; //buffer for analog values
+
+ strcpy(query_buf, httpd->getQueryString(id)); //copy transmitted parameters to query_buf
+ strcpy(out_buf, io_header); //initialize Website output
+
+ io_webhandler_action(query_buf, strlen(query_buf)); //handle transmitted parameters stored in query_buf
+
+
+
+ strcpy(out_buf, analog_header); //initialize Website output
+
+ io_webhandler_action(query_buf, strlen(query_buf)); //handle transmitted parameters
+
+ /*create website in buffer*/
+ strcat(out_buf,"<h1>Analog input</h1><div class=\"lf\"> <div class=\"block2\"><fieldset> ");
+ strcat(out_buf, "<table class=\"form-table border-td\"><tr><th colspan=\"4\" class=\"center-align\">Analog Input</th></tr><tr class=\"center-align\"> <td>A1</td><td>A2</td><td>A3</td><td>A4</td></tr><tr class=\"center-align\">");
+
+ /*read analog ports and create text for website*/
+ for(counter = 1; counter <= 4; counter++){
+ strcat(out_buf,"<th>");
+ analog_buf = read_adc(ASCII_analog + char(counter)); //loop over all analog ports
+ sprintf(tempstring,"%hu mv</th>",analog_buf);
+ strcat(out_buf,tempstring);
+ }
+ strcat(out_buf,"</tr> </table></div>");
+
+ strcat(out_buf, io_footer); //copy footer to buffer
+
+ #if defined debug
+ printf("html length: %i \r\n",strlen(out_buf));
+ #endif
+ httpd->send(id, out_buf, strlen(out_buf), "Content-Type: text/html\r\n"); //send constructed website
+
+}
+
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: io_webhandler_action
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Routine to parse and handle http "get-requests" for dynamic
+ * generated websites.
+ *
+ * eg. toggling output port 3:
+ * http://mbed.ip/dynamic/websitename.htm?p30
+ * -> set port value of port 3 to 0
+ *
+ eg. "o2" toggles output port 2
+ *
+ * Supported Variables:
+ * o = toggle output port
+ * p = set bit to value
+ *
+ * Inputs:
+ * char* query_buf -- pointer to string with http get request variables
+ * int query_buf_len -- length of request string
+ * Outputs:
+ * int -- port value (normally 0 or 1)
+ * and in case of an error "-1"
+ *---------------------------------------------------------------------------*/
+int io_webhandler_action(char *query_buf, int query_buf_len){
+ char io_action = 0; //variables to store parameters
+ char io_port = 0;
+ char io_value = 0;
+
+ #if defined debug
+ printf ("io_webhandler - querystring: %s string-lenth: %i\r\n", query_buf, query_buf_len);
+ #endif
+
+ if (query_buf_len >= 3){ //evaluate io-action parameters
+ sscanf(query_buf, "%c%c%c", &io_action, &io_port, &io_value); //3 or more parameters
+ }else if (query_buf_len == 2){ //2 parameters
+ sscanf(query_buf, "%c%c", &io_action, &io_port);
+ }
+
+ #if defined debug
+ printf("io_webhandler: evaluated http-params %c %c %c \r\n",io_action, io_port, io_value);
+ #endif
+
+ switch (io_action){
+ case('o'): if (io_port != 0)return toggle_port(io_port); //toggle output port
+ break;
+ case('p'): if ((io_port != 0) && (io_value != 0)){return write_portval(io_port,0);} //set output port value
+ break;
+ }
+ return -1; //return -1 if no valid action should be done
+}
+
+
+/* =================================================================== */
+/* functions for hardware abstraction */
+/* =================================================================== */
+
+
+/* analog and digital ports are specified by ascii characters:
+ *
+ * digital input 1 = a
+ * digital input 2 = b
+ * digital input 3 = c
+ * digital input 4 = d
+ *
+ * digital output 1 = 1
+ * digital output 2 = 2
+ * digital output 3 = 3
+ * digital output 4 = 4
+ *
+ * eg. read_portval("b") reads the value of the digital input port 2
+ */
+
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: read_portval
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Reads a value of an io-port and returns its value. (logically correct)
+ * Inputs:
+ * char port_name -- ascii character representing the port
+ * Outputs:
+ * int -- port value (normally 0 or 1)
+ * and in case of an error "-1"
+ *---------------------------------------------------------------------------*/
+int read_portval(char port_name){
+ switch (port_name){
+ case (ASCII_out + 1): if(out1){ return 0;} else{ return 1;}
+ case (ASCII_out + 2): if(out2){ return 0;} else{ return 1;}
+ case (ASCII_out + 3): if(out3){ return 0;} else{ return 1;}
+ case (ASCII_out + 4): if(out4){ return 0;} else{ return 1;}
+ case (ASCII_out + 5): return relay1;
+ case (ASCII_out + 6): return led1;
+ case (ASCII_out + 7): return led2;
+ case (ASCII_out + 8): return led3;
+ case (ASCII_out + 9): return led4;
+ case (ASCII_in + 0): if(in1){ return 0;} else{ return 1;}
+ case (ASCII_in + 1): if(in2){ return 0;} else{ return 1;}
+ case (ASCII_in + 2): if(in3){ return 0;} else{ return 1;}
+ case (ASCII_in + 3): if(in4){ return 0;} else{ return 1;}
+ }
+ return -1;
+}
+
+//
+/*---------------------------------------------------------------------------*
+ * Routine: write_portval
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Function to set output port values (handles inverted logic).
+ * Inputs:
+ * char port_name -- ascii character representing the port
+ * int port_val -- output value
+ * Outputs:
+ * int -- given port value (normally 0 or 1)
+ * and in case of an error "-1"
+ *---------------------------------------------------------------------------*/
+int write_portval(char port_name, int port_val){
+ if (port_val > 1) return 0; //no analog/pwm signal output yet, only 0 and 1
+
+ #if defined debug
+ printf("write Port %c Value %i \r\n",port_name, port_val);
+ #endif
+
+ switch (port_name){
+ case (ASCII_out + 1): if(port_val){ out1 = 0; return 0;} else{ out1 = 1; return 1;} //inverted output logic
+ case (ASCII_out + 2): if(port_val){ out2 = 0; return 0;} else{ out2 = 1; return 1;} //inverted output logic
+ case (ASCII_out + 3): if(port_val){ out3 = 0; return 0;} else{ out3 = 1; return 1;} //inverted output logic
+ case (ASCII_out + 4): if(port_val){ out4 = 0; return 0;} else{ out4 = 1; return 1;} //inverted output logic
+ case (ASCII_out + 5): relay1 = port_val; return relay1; //relay port
+ case (ASCII_out + 6): led1 = port_val; return led1;
+ case (ASCII_out + 7): led2 = port_val; return led2;
+ case (ASCII_out + 8): led3 = port_val; return led3;
+ case (ASCII_out + 9): led4 = port_val; return led4;
+ }
+ return -1;
+}
+
+
+/*---------------------------------------------------------------------------*
+ * Routine: toggle_port
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Function to toggle output ports.
+ * Inputs:
+ * char port_name -- ascii character representing the port
+ * Outputs:
+ * int -- new port value (normally 0 or 1)
+ * and in case of an error "-1"
+ *---------------------------------------------------------------------------*/
+int toggle_port(char port_name){
+ #if defined debug
+ printf("toggle Port %c \r\n",port_name);
+ #endif
+ switch (port_name){
+ case (ASCII_out + 1): out1 = !out1; return out1;
+ case (ASCII_out + 2): out2 = !out2; return out2;
+ case (ASCII_out + 3): out3 = !out3; return out3;
+ case (ASCII_out + 4): out4 = !out4; return out4;
+ case (ASCII_out + 5): relay1 = !relay1; return relay1;
+ case (ASCII_out + 6): led1 = !led1; return led1;
+ case (ASCII_out + 7): led2 = !led2; return led2;
+ case (ASCII_out + 8): led3 = !led3; return led3;
+ case (ASCII_out + 9): led4 = !led4; return led4;
+ }
+ return -1;
+}
+
+/*---------------------------------------------------------------------------*
+ * Routine: read_adc
+ *---------------------------------------------------------------------------*
+ * Description:
+ * Function to read the integrated adc-ports and calculate the input
+ * voltage in millivolts.
+ *
+ * Inputs:
+ * char port_name -- ascii character representing the port
+ * Outputs:
+ * unsigned short -- input voltage in milivolt
+ *---------------------------------------------------------------------------*/
+unsigned short read_adc(char port_name){
+ unsigned int adc_tempval = 0; //32 bit buffer for analog value
+
+ /*read raw analog port value*/
+ switch (port_name){
+ case (ASCII_analog + 1): adc_tempval = ain1.read_u16();
+ break;
+ case (ASCII_analog + 2): adc_tempval = ain2.read_u16();
+ break;
+ case (ASCII_analog + 3): adc_tempval = ain3.read_u16();
+ break;
+ case (ASCII_analog + 4): adc_tempval = ain4.read_u16();
+ break;
+ default: return 0;
+ }
+
+ /* calculate the analog input voltage (input voltage is divided by 3.5):
+
+ The reference voltage of 3.3V (3300mV) is diveded into 2^16 steps.
+ Result in millivolts: Vin_mbed = (3300 * ADC_Value)/65536
+ mbedRail24v uses a voltage divider: Vin_mbedrail24v = Vin_mbed * 3,5
+ -> Vin_mbedrail= (3300 * ADC_Value * 3,5)/65536
+ an integer of 32 bit is required for the calculation, otherwise the multiplication would fail
+ */
+
+ adc_tempval *= 11550; // ADC_Value * 3300 * 3,5
+ adc_tempval /= 0xFFFF; // divide by 65536 (0xFFFF)
+
+ return (unsigned short)adc_tempval; //return the calculated value of an analog port in milivolt
+}
\ No newline at end of file
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Repository details
| Type: | Program |
|---|---|
| Mbed OS support: | Mbed 2 deprecated |
| Created: | 01 Aug 2014 |
| Imports: | 68 |
| Forks: | 0 |
| Commits: | 2 |
| Dependents: | 0 |
| Dependencies: | 4 |
| Followers: | 2 |
The code in this repository is Apache licensed.
mbed Rail 24 V