Hello,
On 29/03/2019 12:57, Christian Spindeldreier wrote:
Hi,
currently we experimenting with the RTEMS-5 on a Cylcone V SoC-FPGA
using the altcycv_devkit BSP. Now we are trying to access a simple
hardware module connected to the HPS2FPGA Bridge via an AXI
interconnect. Our approach of simply write data to the corresponding
address or using the 'alt_write_word()' function which basically does
the same, results in a system crash, so i guess we are missing something.
for this platform please use the RTEMS master and not RTEMS 4.11 or
something like that. You should first get more information about the
system crash. I would install a custom fatal error handler which prints
out the termination reason, see also rtems_exception_frame_print(). With
it you can get the exception reason and the program counter.
I guess, the MMU is not set up to allow an access to this region:
*((volatile uint32_t *) 0xC0000000) = (uint32_t) 1UL;
alt_write_word(0xC0000000, 0x01);
--
Sebastian Huber, embedded brains GmbH
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Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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