Diff: function_generator/interface.cpp

Revision:

0:c059d38d6074

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/function_generator/interface.cpp	Mon Nov 28 10:32:43 2016 +0000
@@ -0,0 +1,99 @@
+#include "main.h"
+#include "rtos.h"
+#include <vector>
+#include <algorithm>
+
+std::vector<Signal> recall;
+
+
+bool get_amplitude (float & amplitude) {
+    if(!serial.scanf("%f", &amplitude))
+        serial.puts("Invalid amplitude!\r\n");
+    else if(!(0 <= amplitude && amplitude <= 3.3f))
+        serial.puts("Amplitude not in range [0, 3.3].\r\n");
+    else return 1;
+    return 0;
+}
+
+bool get_frequency (float & frequency) {
+    if(!serial.scanf("%f", &frequency))
+        serial.puts("Invalid frequency!\r\n");
+    else if(!(0 <= frequency && frequency <= 100000))
+        serial.puts("Frequency not in range [0, 100000].\r\n");
+    else return 1;
+    return 0;
+}
+
+
+osThreadId mainThreadId;
+
+void callback_on_input() {
+    // inform mainThread that there is user input
+    osSignalSet(mainThreadId, 0x1);
+    //Thread::wait(1000);           // wait 1s
+}
+
+void userInterfaceFunc (void const* args) {
+    mainThreadId = Thread::gettid();
+    serial.attach(&callback_on_input);
+    while(1) {
+        serial.puts("\r\n");
+        serial.puts("Enter signal to generate, in the form:\r\n");
+        serial.puts("  * constant <amplitude>\r\n");
+        serial.puts("  * sine <amplitude> <frequency>\r\n");
+        serial.puts("  * square <amplitude> <frequency>\r\n");
+        serial.puts("  * recall <index>\r\n");
+        serial.puts("  * clear\r\n");
+
+        char* str = buffer;
+        Signal signal;
+
+        while(1) {
+            serial.puts("Choice: ");
+            serial.flush();
+
+            osSignalClear(mainThreadId, 0x1);   // ensure thread_signal is cleared
+            Thread::signal_wait(0x1);           // now wait for that thread_signal
+            serial.scanf("%s", str);            // then get the available user input
+
+            if(0==strcmp(str, "constant")) {
+                signal.frequency = 0;
+                if(get_amplitude(signal.amplitude))
+                { signal.type = CONSTANT; break; }
+            }
+            else if(0==strcmp(str, "sine")) {
+                if(get_amplitude(signal.amplitude)
+                && get_frequency(signal.frequency))
+                { signal.type = SINE; break; }
+            }
+            else if(0==strcmp(str, "square")) {
+                if(get_amplitude(signal.amplitude)
+                && get_frequency(signal.frequency))
+                { signal.type = SQUARE; break; }
+            }
+            else if(0==strcmp(str, "recall")) {
+                int i, max = recall.size()-1;
+                if(!serial.scanf("%d", &i))
+                    serial.puts("Invalid index!\r\n");
+                else if(i<0 || i>max)
+                    serial.printf("Index not in range [0, %d].\r\n", max);
+                else { signal = recall[i]; break; }
+            }
+            else if(0==strcmp(str, "clear")) {
+                recall.clear();
+                serial.puts("Done.\r\n");
+            }
+            else serial.puts("Invalid command!\r\n");
+        }
+        serial.printf("Done: %s.\r\n", signal.c_str(buffer));
+
+        if(std::find(recall.begin(), recall.end(), signal) == recall.end()) // if signal does not already exists
+        {
+            serial.printf("Index of signal is %d.\r\n", recall.size());     // then add the new signal
+            recall.push_back(signal);                                       // and provide its index
+        }
+        updateSignal(signal);
+        serial.puts("----------------------\r\n");
+    }
+}
+