Hello, I'm wondering how to write to the I/O area of LEON2. I could read some data from FIFOs mapped in this area but I can't write anything successfully in...
Stephane Davy
stephane.davy@...
Aug 1, 2005 8:22 am
7063
WRITEN is the write strobe for the I/O area. It is asserted together with IOSN during I/O write cycles, see the timing diagram in the manual. Jiri....
Hie, I wonder what I should do, at config time, to obtain a basic filesystem, for Snapgear, inside my sdram. I would like another one than Romfs (since, as...
Hi, I have configured the Leon for a 16 bit data bus. The manual says to connect Data [31:16] and Address[27:1] to the memory. I need to change the memory...
Hi Jiri, As you know,flush instruction writes "000..00" in the tag memory(set1). There is a variable in icache.vhd named "hit". This variable is set ...
hello,pender and all! I am using GR-PCI-XC2V hard board I want to boot a program from extern flash rom, I tried to make a rom file by mkprom tool and writed...
Dear Jiri: I am studying grlib IP library by using designs/leon3mp model. In the leon3mp.vhd, AHB,APB and leon3s use the same clock-->clkm. If I want to use...
Clkgen does not affect which clock is used in different cores. It generates different clock outputs such as amba clock, pci clock etc but these are then...
Hello, I was wondering where to find information on set_vector() and _ISR_Vector_table to be able to write the second interrupt dispacher handler. I'm using...
Stephane Davy
stephane.davy@...
Aug 4, 2005 12:06 pm
7073
Thanks Jiri for the tip about snapgear. When I tried to compile the linux 2.6 (with MMU, I'll use it), a message appeared, "There is no preset for linux 2.6...
Hello again, I've spent a couple of hours trying to play with IRQs, but only could make work the 1st controler, not the optional one. I first can see IRQ 4 to...
Stephane Davy
stephane.davy@...
Aug 4, 2005 4:18 pm
7075
Note that you must use snapgear-p13 from our site (www.gaisler.com). The standard snapgear distribution does not support leon with MMU. Jiri....
Dear all, I'm trying to design a very high performance multimedia system. We need to desing a multiple AHB bus system. After looking at leon2 and leon3 ...
Yes, I have been able to reproduce this problem. It is a simulation-only issue. On hardware, the value or r.lrr does not matter after a flush so cache...
Hi all, I simulate with leon2 version1.0.29 using modelsim and my application program (simple "hello world"). It can't print "hello world" and ends with "**...
Hi I'm very glad to see you these messages Currently I am required to connect a 16-bit flash to leon core. But I am a newbie to leon core and there are some...
Seems to be a cygwin issue. I don't know which ecos version you are using, but if you the version from our web site, you must use the BCC tool-chain...
Hi, I would like to use the burst operation on AHB in INCR mode for more than 1kB address boundary. Is it OK, if I just make htrans := HTRANS_NONSEQ for a...
You can start a new burst by setting htrans to HTRANS_NONSEQ for one access, see figure 3-11 in the AMBA standard for an example. You must keep asserting bus...
i'm trying to geenerate leon3mp with make ise but i receiving the following problems : Checking expanded design ... ERROR:NgdBuild:604 - logical block...
LuÃsVitório C...
lvcargnini@...
Aug 8, 2005 5:23 pm
7085
Switch off the GRFPU in the configuration of the processor. No FPU is provided with the GPL version of GRLIB. Jiri....
Hi all: I connect a 16-bit flash to Leon FPGA. Under grmon-1.0.8 dsu back- end, the command "flash" can detect the flash's manufacture but not sizes. So I have...
I'm currently having trouble getting hardware breakpoints to work when setting them through gdb. At present I can set software breakpoints and they work fine....
hi, Can somebody suggest a good reference for the leon assembly instructions. I have already referred to http://www.gaisler.com/doc/sparcv8.pdf document. If...
You can try: "SPARC Architecture, Assembly Language Programming and C" by Richard Paul http://cwx.prenhall.com/bookbind/pubbooks/paul/ You can buy it online at...
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