On 30/04/2014 9:18 pm, Giovanni Macciocu wrote:
Hi All,
I'm working with a recent rtems head (23 April 2014) and the
'xilinx_zynq_zedboard' BSP.
I have everything up and running but somehow it looks if my clock / sleep
relation is wrong. If i perform an usleep(1000) it will sleep for 2000 us
instead of 1000. Also the baudrate of the serial port is 57600 instead 115000.
I wonder if it has something to do with the GTC (Global Clock Time) which is
always clocked at 1/2 of the CPU frequency for an ARM Cortex A9.
Has anybody experienced similar problems or does somebody perhaps have an idea
why such an error might occur?
I suggest you take a look at the BSPOPTS for the zync BSP. There are
some clocks you can set and one of these may help. I think
BSP_ARM_A9MPCORE_PERIPHCLK is the one.
Chris
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