Diff: main.cpp

Revision:

0:0d85b515c87d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jan 29 10:49:38 2018 +0000
@@ -0,0 +1,68 @@
+#include "mbed.h"
+
+#define PAGE_SIZE 4096
+#define HEADER_SIZE 10
+#define PACKET_SIZE 8
+#define BAUD_RATE 921600
+#define F_SW 5000.0f
+
+#define clip(a) if ((a > 254)) a = 254
+
+Serial serial4(A0, A1);
+Ticker tick;
+DigitalOut test(PC_8);
+DigitalOut test2(PC_6);
+DigitalOut led(LED1);
+
+int index = 0;
+char *front, *back, *tmp;
+char buf1[PAGE_SIZE], buf2[PAGE_SIZE];
+
+unsigned char a = 0, b = 32, c = 64, d = 96, e = 128, f = 160, g = 192, h = 224;
+void tic() {
+    test = 1;
+    volatile int x;
+    for (x = 0; x < 1000; x++) {
+    }
+    front[index] = 0xff;
+    front[index+1] = a++;
+    front[index+2] = b++;
+    front[index+3] = c++;
+    front[index+4] = d++;
+    front[index+5] = e++;
+    front[index+6] = f++;
+    front[index+7] = g++;
+    front[index+8] = h++;
+    if (a == 0xff) a = 0;
+    if (b == 0xff) b = 0;
+    if (c == 0xff) c = 0;
+    if (d == 0xff) d = 0;
+    if (e == 0xff) e = 0;
+    if (f == 0xff) f = 0;
+    if (g == 0xff) g = 0;
+    if (h == 0xff) h = 0;  
+    index += PACKET_SIZE+1;
+    test = 0;
+}
+
+int main() {
+    front = buf1;
+    back = buf2;
+    
+    serial4.baud(BAUD_RATE);
+    tick.attach(tic, 1/F_SW);
+    
+    for (;;) {
+        if (index == PAGE_SIZE-HEADER_SIZE) {
+            test2 = 1;
+            led = 1;
+            index = 0;
+            tmp = front;
+            front = back;
+            back = tmp;
+            for (int i = 0; i < PAGE_SIZE-HEADER_SIZE; i++) serial4.putc(back[i]);
+            led = 0;
+            test2 = 0;
+        }
+    }
+}