Diff: main.cpp

Revision:

0:47fad9a39024

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Aug 13 10:22:41 2010 +0000
@@ -0,0 +1,92 @@
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "HTTPServer.h"
+
+#define SAMPLE_COUNT 1000
+
+LocalFileSystem local("local");
+
+DigitalOut led1(LED1);
+DigitalIn sda(p9);
+DigitalIn scl(p10);
+
+char sdamem[SAMPLE_COUNT];
+char sclmem[SAMPLE_COUNT];
+
+EthernetNetIf eth;
+HTTPServer svr;
+
+void capture() {
+    scl.mode(PullUp);
+     while (scl) {
+        wait_us(2);
+    }
+    for (int i = 0; i < SAMPLE_COUNT; i++) {
+        sdamem[i] = sda;
+        sclmem[i] = scl; 
+        wait_us(1);
+    }
+}
+
+void plot(FILE* fp, char * name, char * mem, int offset) {
+    fprintf(fp, "<g transform='translate(100,%i)'>", offset);
+    fprintf(fp, "<text x='10' y='40' style='fill:black;stroke:none;font-size:16pt;font-family:arial'>%s</text>", name);
+    fprintf(fp, "<path d='M 50 50 ");
+    for (int i = 0; i < SAMPLE_COUNT; i++) {
+       fprintf(fp, "L %i %i %i %i ", 50+ 5*i, 50*mem[i], 55+5*i, 50*mem[i]);
+    }
+    fprintf(fp, "' />\n");
+    fprintf(fp, "</g>");
+}
+
+void writeSVG() {
+    FILE *fp = fopen("/local/out.svg", "w");  // Open "out.txt" on the local file system for writing
+    fprintf(fp, "<svg xmlns='http://www.w3.org/2000/svg' width='1200' height='500'>\n");
+    fprintf(fp, "<text x='500' y='50' style='fill:black;stroke:none;font-size:20pt;font-family:arial'>I2C bus activity</text>");
+    fprintf(fp, "<g style='fill:none;stroke:black'>");
+   
+    plot(fp, "SDA", sdamem, 110);
+    plot(fp, "SCL", sclmem, 210);
+  
+    fprintf(fp, "</g>");
+    fprintf(fp, "</svg>");
+    fclose(fp);
+}
+
+void startServer() {
+EthernetErr ethErr = eth.setup();
+    if (ethErr) {
+        printf("Error %d in setup.\n", ethErr);
+        return;
+    }
+    printf("Server setup OK\n");
+
+    FSHandler::mount("/local", "/"); //Mount /webfs path on web root path
+    svr.addHandler<FSHandler>("/"); //Default handler
+
+    svr.bind(80);
+
+    printf("Listening...\n");
+
+    Timer tm;
+    tm.start();
+    //Listen indefinitely
+    while (true) {
+        Net::poll();
+        if (tm.read()>.5) {
+            led1=!led1; //Show that we are alive
+            tm.start();
+        }
+    }
+}
+
+
+int main() {
+    led1 = 0;
+    capture();
+    writeSVG();
+    startServer();
+}
+
+
+