Hello, In order to choose between LEON2 and LEON3, I have some questions: Among LEON3 features, we find: SPARC V8 instruction set with V8e extensions. In LEON3...
Hello Jiri, Hi all, i compiled a snapgear-2.0.x-Kernel (finally on a linuxhost :) but i have problems with tsim. My configuration uses SRAM. So i have to...
Hi all... when i launch my script in dc_shell, synopsys tells me that thare are 2 unresolved reference to TIEHI and TIELO. I've used in the script the LINK...
If you have configured the kernel to use sram, you must of course not use the -nosram option in the simulator. Make sure that you have configured the correct...
An updated eCos port for leon2 and leon3 is now available for download via: http://www.gaisler.com/products/ecos.html This port is based on the latest eCos cvs...
Hi, Jiri and other members: I try to simulate leon2 in power-down mode, like SDRAM in self- refresh mode. So I pull down SDRAM CKE input to force SDRAM in...
Hi, I'm looking at using the LEON2 as an embedded processor in a low power device. There are a few changes to the current architecture that I'm planning on...
... Removing the caches and accessing data over the AHB bus will give you a large penalty, since a cache miss will take 2 clocks to process before the access...
Hi Jiri I am looking into running a number of (statically-multithreaded) video coding algorithms on the Leon3 platform. I have validated the algorithms on a...
hi,jiri Thank you for adding me in this group! I have two questions about DSU UART in leon2: 1)Can DSU UART be used as UART1? If it is,how to do it? 2)In...
... The DSU uart cannot work as a normal UART, it is specially designed for DSU communications. ... The -u switch in grmon sets the normal UART (i.e. not the...
... thank you,jiri when i use command dsumon -i -u ,then the printf function will transmitted all characters through DSU UART to screen.i want to know wether...
Note that any shared vaiable (as well as variables used for implementing delay counters) must be marked 'volatile' or the compiler might remove them or...
Hi all, I´m trying to interface a ZBT RAM to leon. So I have to introduce some wait states while reading/writing. Can I use BRDYN signal to introduce wait...
Thank you for the tip. Unfortunately, it didn't work in this instance; Both contexts (dual CPU AHB system) can access variables however, when contexts try to...
It is of course not possible to maintain absolute coherency when two cpus write the same variable unless you use semaphores or some form of critical sections....
Serialization should be via the memory port - the caches should be able to support such code. What I experience here is loosing state (ie, cpu0 executes a...
It is impossible to have to cpus incrementing a shared variable in parallel and then get the combined result written out to memory. Especially if both cpu have...
I agree. Updates to variables cached in the architected register file cannot be made immediately visible since the register file does not participate in...
... I'm using the LEON2 with ZBT SSRAM at the moment. I set the RAM waitstates to 3 (my MEMCFG2 words is 0xc7a) and then wrote a small state machine that takes...
Thnx Michael for your suggestion. Can you tell me where do u set the values for mcfg2. I´m working on ADM-XRC board. I´m thinking of writing the controller...
... Unfortunately, DMA transfers to memory from other devices is necessary in my situation. One thing I was thinking of doing was using dual port ram and...
... You set MEMCFG2 in software (for example in the boot prom). You could also set it over the debug port, running something like GRMON and issuing a 'wmem'...
... If you can use dual-port RAM, then mapping the processor's local-ram also on the AHB is the best solution. You could reuse the AHB interface from the...
... The -mflat option sounds like a good idea. I'll see if I can get eCos running this way, and post in case anyone is interested. Thanks for your help, ...
Hi, I'm using GRMON with the LEON2 and I've noticed that GRMON stops responding to requests on port 2222 when GDB closes the connection. However, it does not...
grmon should close the port and return to the prompt when gdb closes the connection. You need then then to type 'gdb' again to restart gdb communications. The ...
hello I'm working to adapt Leon processor for smart cards and test him with a program for digital sign of documents. i configured the processor and i tested...
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