Hi Pablo, use 'printk' in the xilinxfb driver to follow the initialization steps, because I'm not sure but I think the driver doesn't print nothing. Regards, Inaki -----Mensaje original----- De: owner-microblaze-uclinux@xxxxxxxxxxxxxx en nombre de pcolodron@xxxxxxxx Enviado el: mar 24/03/2009 9:25 Para: microblaze-uclinux@xxxxxxxxxxxxxx Asunto: Re: [microblaze-uclinux] VGA controller in Microblaze Hi Inaki, I've tested the TFT IP and it works. I've created a software application in EDK using the library 'xtft.h' which plots on the screen the typical color bars. At least, now I know that the EDK project is ok so thank you very much Inaki. What I should do now is to figure out what is wrong in my kernel. As I told you I've created the kernel with framebuffer support and using the driver 'xilinxfb.c' (I checked that the driver is compiled with the kernel and it is). However, the boot log shows that the framebuffer is not recognised. It can be seen how the uartlite is assigned to ttyS0 and how xgpio1 and xgpio2 are recognised as well. Do you have any idea of what could be the problem? Probably it is a basic step that I am not taking. Sorry about being so annoying with too many questions... Thanks a lot Inaki. Regards, Pablo Colodron Val Inaki escribió: > Hi Pablo, > > I think you should first check that the TFT IP works. Connect the > MPLB port to the PLB bus in order to read the framebuffer memory, > which must be within the DDR space memory. To program the TFT > configuration registers connect the SPLB port to the PLB bus, and in > this way EDK will compile the TFT library for peripheral testing. > > Regards, > > Inaki > > > -----Mensaje original----- > De: owner-microblaze-uclinux@xxxxxxxxxxxxxx en nombre de pcolodron@xxxxxxxx > Enviado el: mié 18/03/2009 16:41 > Para: microblaze-uclinux@xxxxxxxxxxxxxx > Asunto: Re: [microblaze-uclinux] VGA controller in Microblaze > Hi Inaki, > > I've tried to dump the file to /dev/fb0 (with cat /bin/busybox > /dev/fb0) but I got the next message: '/dev/fb0: cannot create". > > Unfortunately I couldn't test the TFT peripheral because the only > tests which are available in my project in EDK are for uartlite, gpio, > iic and sysace. Do you know where I could find one? > > I will tell you the steps that I have followed to create my system > such that you may see if there is something wrong: > > - I have created a project for my Spartan3 Starter kit using the > tool Base System Builder in EDK. > - Then I have followed the Petalinux tutorial to add fs-boot, etc. > Moreover, I've added one PS/2 peripheral and one TFT peripheral. > > Here I have some doubts. In the TFT IP Core, there is a parameter > called 'Base Address of PLB Attached Video Memory'. I supose that the > framebuffer should be in the DDR memory, so in that parameter I wrote > an address which is inside the DDR. I don't know if this is the > appropriate way of setting up the framebuffer. Another thing is that > in my TFT IP Core, the parameter 'Select Controller Register Access > Interface' is selected and 'Select TFT Interface' is unselected. It > is connected to PLB bus using a SPLB interface. > > Moreover, I am not sure about which is the suitable way of configuring > my DDR. In this IP Core, PORT0 is configured as PLBV46, and this is > the only thing that I have configured. However, I don't know if some > other port must ve activated in mode VFBC (Virtual Frame Buffer Controller). > > -Once I created EDK project, I compiled the kernel with > 'xilinxfb', as you had told me (with framebuffer support and so on). > Then I loaded the kernel into the board and I got the following > boot log: > > ## Booting image at 858c0000 ... > Image Name: PetaLinux Kernel 2.6 > Image Type: Microblaze Linux Kernel Image (uncompressed) > Data Size: 2379812 Bytes = 2.3 MB > Load Address: 88000000 > Entry Point: 88000000 > Verifying Checksum ... OK > OK > Linux version 2.6.20-uc0 (root@xxxxxxxxxxxxxxxxxxxxx) (gcc version > 3.4.1 ( PetaL > inux 0.20 Build -rc1 050607 )) #47 Wed Mar 18 15:59:38 CET 2009 > setup_cpuinfo: initialising > setup_cpuinfo: No PVR support in CPU. Using static compile-time info > set_cpuinfo_static: Using static CPU info. > setup_memory: max_mapnr: 0x8ffff > setup_memory: min_low_pfn: 0x88000 > setup_memory: max_low_pfn: 0x8000 > On node 0 totalpages: 32768 > DMA zone: 256 pages used for memmap > DMA zone: 0 pages reserved > DMA zone: 32512 pages, LIFO batch:7 > Normal zone: 0 pages used for memmap > Built 1 zonelists. Total pages: 32512 > Kernel command line: > mtdparts=physmap-flash.0:256K(boot),256K(bootenv),256K(conf > ig),5M(image),2M(spare) macaddr=00:0a:35:00:22:01 console=fb0 > console=ttyS0,1152 > 00 > OPB INTC #0 at 0x81800000 > PID hash table entries: 512 (order: 9, 2048 bytes) > Console: colour dummy device 80x25 > Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) > Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) > Memory: 127388k/131072k available > Calibrating delay loop... 1.40 BogoMIPS (lpj=7040) > Mount-cache hash table entries: 512 > io scheduler noop registered > io scheduler anticipatory registered > io scheduler deadline registered > io scheduler cfq registered (default) > xgpio0 #0 at 0x81420000 mapped to 0x81420000 device: 10,185 not using IRQ > xgpio1 #1 at 0x81400000 mapped to 0x81400000 device: 10,186 not using IRQ > uartlite.0: ttyS0 at MMIO 0x84000000 (irq = 1) is a uartlite > RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize > uclinux[mtd]: RAM probe address=0x8816ed8c size=0xe9000 > Creating 1 MTD partitions on "RAM": > 0x00000000-0x000e9000 : "ROMfs" > uclinux[mtd]: set ROMfs to be root filesystem index=0 > i8042.c: i8042 controller self test timeout. > mice: PS/2 mouse device common for all mice > VFS: Mounted root (cramfs filesystem) readonly. > Freeing unused kernel memory: 88k freed > Mounting proc: > Mounting var: > Populating /var: > Running local start scripts. > Mounting /etc/config: > Populating /etc/config: > flatfsd: Nonexistent or bad flatfs (-48), creating new one... > flatfsd: Failed to write flatfs (-48): No such device > flatfsd: Created 3 configuration files (117 bytes) > Mounting sysfs: > Setting hostname: > uclinux login: > > > As you can see, there are no references to fb0 or any framebuffer > parameter and I think that those kind of parameters should be > mentioned, shouldn't they? > > Thanks a lot for your advices, they are being very helpful. > > Kind regars, > > Pablo Colodron > > > > Val Inaki escribió: >> Hi Pablo, >> >> this xilinx framebuffer driver is just for Linux kernel, U-boot >> uses its own framebuffer driver. So, having the device /dev/fb0, >> could you try to dump something (dummy file) to /dev/fb0? >> >> > cat /bin/busybox > /dev/fb0 >> >> you should see something in the screen. >> >> Have you tried the TFT peripheral test from EDK to see if the TFT IP works? >> >> Regards, >> >> Inaki >> >> >> -----Mensaje original----- >> De: owner-microblaze-uclinux@xxxxxxxxxxxxxx en nombre de pcolodron@xxxxxxxx >> Enviado el: mié 18/03/2009 13:07 >> Para: microblaze-uclinux@xxxxxxxxxxxxxx >> Asunto: Re: [microblaze-uclinux] VGA controller in Microblaze >> Hi Inaki, >> >> In order to set up the framebuffer for my Spartan3 board, I've done >> what you told me. I added xilinxfb.c and xilinxfb.h to the >> petalinux tree. I've also modified the 'Kconfig' and 'Makefile' >> files which are in .../drivers/video. Then, in 'menuconfig' I >> have selected the framebuffer such that the compiler uses >> xilinxfb.c as framebuffer. >> >> I've compiled the kernel and everything seemed to be ok. However, >> my uClinux system doesn't recognize the framebuffer. If I >> execute 'fbset --show' it says that there are no devices >> (although in folder /dev I can see 'fb0'). I have also tried to >> check if U-boot recognized the device using the command >> 'coninfo', but the list of available devices was empty. >> >> I think I am missing some steps when trying to set up the >> framebuffer. Do you know if U-boot needs an extra configuration to >> add the framebuffer? I've been tried to figure this out for many >> days but I couldn't do it. >> >> Please if anybody has any hint it would be very appreciated. >> >> Thank you very much. >> >> Regards, >> >> Pablo Colodron >> >> >> >> Val Inaki escribió: >>> Hi, >>> >>> you also need the headers file 'xilinxfb.h' and modify the >>> 'Kconfig' and 'Makefile' files from the /drivers/video folder. >>> There is another issue with this driver because you need to add >>> the code for registering the device with its resources, which are >>> the address space for accesing the SPLB registers. >>> >>> The graphical libraries can use the framebuffer driver, so they >>> will use '/dev/fb0'. >>> >>> Best regards, >>> >>> Inaki >>> >>> >>> -----Mensaje original----- >>> De: owner-microblaze-uclinux@xxxxxxxxxxxxxx en nombre de pcolodron@xxxxxxxx >>> Enviado el: mar 20/01/2009 10:31 >>> Para: microblaze-uclinux@xxxxxxxxxxxxxx >>> Asunto: RE: [microblaze-uclinux] VGA controller in Microblaze >>> Hi Inaki, >>> >>> It is nice to have your help, thanks a lot. As you have guessed, I >>> am thinking of using a LDC display and I have configured the >>> IP core to 25MHz. >>> >>> So, according to your mail, the only thing that I should do is to >>> copy the driver 'xilinxfb.c' in the directory >>> .../linux-2.6.x/drivers/video and after that rebuild the kernel. >>> Is that right? >>> >>> Once the kernel is built, one should start with the graphical >>> library but in this step, which is the video device that you use >>> (I mean the device in romfs/dev/)? fb0? console? >>> >>> Thank you very much for your help Inaki. >>> >>> Kind regards, >>> >>> Pablo >>> >>> >>> Val Inaki escribió: >>>> Hi, >>>> >>>> We are also using the Xilinx TFT IP with a Spartan3A FPGA and >>>> Petalinux/MicroblazeMMU. In our Petalinux distribution there was not any >>>> TFT driver, so we had to add it manually in the kernel tree: >>>> >>>> http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/video/xilinxfb.c >>>> >>>> You also need to activate the framebuffer support in order to access de >>>> video memory. After everything is working you can use any graphical >>>> library, in our case we have started working with the supplied version >>>> of microwindows in the Petalinux distribution. >>>> >>>> Remember that the Xilinx TFT IP is for a hardcoded 640x480 resolution, >>>> but clocking the IP to 25MHz, you can connect a LCD display through the >>>> VGA connector. >>>> >>>> I hope this information would be helpful. >>>> >>>> Regards, >>>> >>>> Inaki >>>> >>>> -----Mensaje original----- >>>> De: owner-microblaze-uclinux@xxxxxxxxxxxxxx >>>> [mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] En nombre de >>>> pcolodron@xxxxxxxx >>>> Enviado el: lunes, 19 de enero de 2009 9:57 >>>> Para: microblaze-uclinux@xxxxxxxxxxxxxx >>>> Asunto: Re: [microblaze-uclinux] VGA controller in Microblaze >>>> >>>> Hi John, >>>> >>>> Thanks a lot for your answer. I am using the XPS TFT ip core >>>> (which is available in IP Catalog -> IO Modules, in EDK 10.1). >>>> >>>> I will take a look to the framebuffer drivers that you told me. >>>> Anyway, I think I will have to activate the 'framebuffer >>>> support' in the Petalinux configuration, is that right? >>>> >>>> In addition to this, I will try to figure out which is the most >>>> suitable graphics engine for my system because I am using >>>> fbcon and I don't know if it is very common in embedded >>>> systems. >>>> >>>> I could find this framebuffer in the directory >>>> /linux-2.6.x/drivers/video/console/fbcon.c. However, when I >>>> create the petalinux kernel and I explore the directory >>>> /romfs/dev/, it seems that the only frammebuffers that I >>>> have are '@console,c,5,1' and '@fb0,c,29,0' (is the fbcon >>>> framebuffer really activated?). I have not tested it yet, >>>> but, before doing this, it would be great to know if my >>>> kernel is properly configured. >>>> >>>> Thank you very much for your help John. >>>> >>>> Kind regards >>>> >>>>> Hi Pablo, >>>>> >>>>> On Fri, Jan 9, 2009 at 8:22 PM, <pcolodron@xxxxxxxx> wrote: >>>>> >>>>> >>>>> I am actually trying to work with the latest version of >>>>> Petalinux in my >Xilinx Spartan3 development kit. I am quite >>>>> unexperienced in this sense but I >have already solved some >>>>> problems concerning EDK and building the Petalinux >kernel. >>>>> >>>>> What I would like to do now is to develop a graphical user >>>>> interface in >Petalinux (to do this, I will use a graphic >>>>> library called MiniGUI). This >software is basically a >>>>> C-written program which shows the GUI by means of the >>>>> >framebuffer fbcon. However, I have some doubts about how >>>>> to do it. >>>>> >>>>> My problems are related to the EDK project. I don't really >>>>> know if >Petalinux will work with any type of VGA IP Core. I >>>>> mean, will petalinux >detect that I have a VGA IP core? That >>>>> will be enough if I want to use a LCD >or a monitor? >>>>> Because of my lack of knowledge in this sense I don't >>>>> really get >to understand how to do this. >>>>> >>>>> Please if you know any place where some cores are avaliable >>>>> (or some >information about how to build a VGA controller >>>>> which works in Petalinux) it >would be nice of you to tell me. >>>>> >>>>> >>>>> You will require a framebuffer device driver - they are quite >>>>> simple to write, >with many examples in >>>>> linux-2.6.x/drivers/video >>>>> >>>>> Which VGA IP core are you using? >>>>> >>>>> Regards, >>>>> >>>>> John >>>> ___________________________ >>>> microblaze-uclinux mailing list >>>> microblaze-uclinux@xxxxxxxxxxxxxx >>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux >>>> Mailing List Archive : >>>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/ >>>> >>>> >>>> ___________________________ >>>> microblaze-uclinux mailing list >>>> microblaze-uclinux@xxxxxxxxxxxxxx >>>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux >>>> Mailing List Archive : >>>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/ >>>> >>>> >>> ___________________________ >>> microblaze-uclinux mailing list >>> microblaze-uclinux@xxxxxxxxxxxxxx >>> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux >>> Mailing List Archive : >>> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/ >>> >>> >> >> >> ___________________________ >> microblaze-uclinux mailing list >> microblaze-uclinux@xxxxxxxxxxxxxx >> Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux >> Mailing List Archive : >> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/ >> >> > > > > > ___________________________ > microblaze-uclinux mailing list > microblaze-uclinux@xxxxxxxxxxxxxx > Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux > Mailing List Archive : > http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/ > > ___________________________ microblaze-uclinux mailing list microblaze-uclinux@xxxxxxxxxxxxxx Project Home Page : http://www.itee.uq.edu.au/~jwilliams/mblaze-uclinux Mailing List Archive : http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/
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