serial setpos

device/serialstream.cc

@@ -1,4 +1,5 @@
 #include "serialstream.h"
+#include "../utils/string.h"
 
 SerialStream::SerialStream(ComPort port, BaudRate baud_rate, DataBits data_bits,
                            StopBits stop_bits, Parity parity)
@@ -6,6 +7,46 @@ SerialStream::SerialStream(ComPort port, BaudRate baud_rate, DataBits data_bits,
 
 void SerialStream::flush() {}
 
+// https://stackoverflow.com/questions/3440726/what-is-the-proper-way-of-implementing-a-good-itoa-function
+// Yet, another good itoa implementation
+// returns: the length of the number string
+int itoa(int value, char *sp, int radix)
+{
+    char tmp[16];// be careful with the length of the buffer
+    char *tp = tmp;
+    int i;
+    unsigned v;
+
+    int sign = (radix == 10 && value < 0);    
+    if (sign)
+        v = -value;
+    else
+        v = (unsigned)value;
+
+    while (v || tp == tmp)
+    {
+        i = v % radix;
+        v /= radix;
+        if (i < 10)
+          *tp++ = i+'0';
+        else
+          *tp++ = i + 'a' - 10;
+    }
+
+    int len = tp - tmp;
+
+    if (sign) 
+    {
+        *sp++ = '-';
+        len++;
+    }
+
+    while (tp > tmp)
+        *sp++ = *--tp;
+
+    return len;
+}
+
 void SerialStream::setForeground(Color c) {
     write(0x1b);
     write('[');
@@ -29,11 +70,16 @@ void SerialStream::setAttribute(Attrib a) {
     write('m');
 }
 
-void SerialStream::reset() {}
+void SerialStream::reset() {
+    write(0x1b);
+    write('c');
+}
 
 void SerialStream::setPos(int x, int y) {
-  (void)x;
-  (void)y;
+    char out[] = {0x1b, '[', 0, 0, ';', 0, 0, 'H', 0};
+    itoa(x, &out[2], 10);
+    itoa(y, &out[5], 10);
+    print(out, strlen(out));
 }
 
 void SerialStream::print(char* str, int length) {

main.cc

@@ -48,6 +48,8 @@ extern "C" int main() {
   ss.print("test", 4);
   ss.setBackground(SerialStream::CYAN);
   ss.print("test", 4);
+  ss.setPos(10, 10);
+  ss.print("test", 4);
 
   /* Start application processors
    * To avoid unexpected behaviour, make sure that interrupts are not