Example_printf.cpp

00001 /// @file Example_printf.cpp
00002 /// @brief Formatted output
00003 /// 
00004 /// - Uses SerialDriver with USBTX and USBRX.
00005 /// - Has much too small buffers, but printf is blocking, so it does not matter
00006 /// 
00007 /// - The terminal will be flooded with text
00008 /// - LED4 indicates parallel thread working
00009 /// 
00010 
00011 #if 0
00012 
00013 #include "SerialDriver.h"
00014 
00015 // only 4 byte of software ring buffer?
00016 // No problem! SerialDriver uses idle blocking calls :D
00017 SerialDriver pc(USBTX, USBRX, 4, 4);
00018 
00019 // This thread is running in parallel
00020 DigitalOut led4(LED4);
00021 void parallel(void const * argument)
00022 {
00023     while(1)
00024     {
00025         Thread::wait(20);
00026         led4= !led4;
00027     }
00028 }
00029 
00030 int main()
00031 {
00032     // Start the other thread
00033     Thread parallelTask(&parallel);
00034     
00035     float f= 0.0f;    
00036     while(1)
00037     {
00038         // unformatted text
00039         pc.puts("Hi! this uses puts.\r\n");
00040         
00041         // formatted text
00042         pc.printf("And this is formatted. Here is the sin(%f)=%f.\r\n", f, sinf(f));
00043         f+= 0.25f;
00044     }
00045 }
00046 
00047 #endif