> On 15.08.2016 20:01, Philipp Klaus Krause wrote: >> Hello, >> >> I wrote my first little mcs51 program today, for the Cypress FX2LP. But >> I encountered a problem: Timer 1 runs too fast. When I set up Timer 0 >> and Timer 1 the same, Timer 1 runs about 4 times faster. >> >> I first noticed the problem when trying to do a software UART, which >> worked with Tiemr 1, but not with Timer 2. >> >> I have attached programs for a 2-bit counter on the LEDs of my board a >> bits 0 and 1 of port A. With Timer 1, the counter increments once per >> second. > > The previous two paragraphs were meant to be: > > I first noticed the problem when trying to do a software UART, which > worked with Tiemer 0, but not with Timer 1. > > I have attached programs for a 2-bit counter on the LEDs of my board a > bits 0 and 1 of port A. With Timer 0, the counter increments once per > second. > >> I compile my programs using >> sdcc -mmcs51 test2.c >> and put them onto the FX2LP using >> cycfx2prog prg:test2.ihx run >> >> Philipp
Hello Philipp, You did not set CKCON which selects the prescaler clk/4 or clk/12. T0M and T1M should be 0 after reset, but the loader may have left them differently. Maarten ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. http://sdm.link/zohodev2dev _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
