Dennis, I have another thought as to what may be the problem. Do you see any linker warnings when you build the sample from Keil with SDCC?
If you use the source from the keil site, the code will not work since there is no putchar() function defined in the sdcc stdio.h. The function is declared in stdio.h, but it must be defined by the user because different projects will need to handle output very differently. For example, for one project, I have a putchar() that can be switched between several different serial ports and the SPI. Each option has a different handler. When you added the serial_IO library, you added a basic serial putchar() function. --Mark Dennis Muhlestein wrote: > Here is something that does work though, if I change the example from keil: > http://www.keil.com/support/docs/685.htm > > to use the include files from sdcc, I start to get the correct functionality: > > //-------- working --------------- > #include <8051.h> > #include <serial_IO.h> > #include <stdio.h> > > void main (void) > { > SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */ > TMOD |= 0x20; /* TMOD: timer 1, mode 2, 8-bit reload */ > TH1 = 0xf3; /* TH1: reload value for 2400 baud */ > TR1 = 1; /* TR1: timer 1 run */ > TI = 1; /* TI: set TI to send first char of UART */ > > while(1) > { > unsigned char aaa; > aaa = getchar(); > putchar(aaa); > } > } > > //-------- end working ------------ > > So in summary, I think that the fx2 has picky reload values for the timer > auto reload at the least. I also thing there may possibly be some issues > with the calculations in the clock and simple examples that come with sdcc. > It could be that they are hardware specific issues though. In the mean time, > I'm happy enough using Timer 2 instead of Timer 1. > > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
