Reading files from CF (microblaze 7 and plb)
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From: lomtikster on 6 Oct 2008 02:21 Hi everyone, I would like to read a file from a CF card on xupv2p board using PLB and Microblaze 7.10d. There are a few questions that I am trying to answer. There is an xps_sysace interface controller v1.00a which seats between the PLB and the system ace CF peripheral and has sysace v1_11_a driver with functions like XSysAce_SectorRead and XSysAce_SectorWrite. However, I have not found any file system management soft like sysace_fopen and sysace_fread provided with XilFatfs FATFile System access library (xilfatfs_v1_00_a) that, from its doc, requires OPB SYSACE Interface Controller - Logicore module. How else would you read files from the a CF via PLB? Would it require modifying xilfatfs to support PLB? Probably I could reuse the xilfatfs_v1_00_a if I use the older MB 6 with OPB bus and opb_sysace or OPB2PLB bridge and xps_sysace.
From: G�ran Bilski on 6 Oct 2008 04:08 Hi, First, MicroBlaze v7 still handles OPB interface, the default is just PLB. The parameter C_USE_INTERFACE determines what interface MicroBlaze should use. I don't know the details of the XilFatfs library but I doubt that it only works with the opb based version. Have you tried using it for the xps based version? G�ran <lomtikster(a)gmail.com> wrote in message news:e5ef2d98-e7e4-466e-87b5-274a90255a3b(a)k36g2000pri.googlegroups.com... > Hi everyone, > > I would like to read a file from a CF card on xupv2p board using PLB > and Microblaze 7.10d. There are a few questions that I am trying to > answer. > > There is an xps_sysace interface controller v1.00a which seats between > the PLB and the system ace CF peripheral and has sysace v1_11_a driver > with functions like XSysAce_SectorRead and XSysAce_SectorWrite. > However, I have not found any file system management soft like > sysace_fopen and sysace_fread provided with XilFatfs FATFile System > access library (xilfatfs_v1_00_a) that, from its doc, requires OPB > SYSACE Interface Controller - Logicore module. How else would you read > files from the a CF via PLB? > Would it require modifying xilfatfs to support PLB? > > Probably I could reuse the xilfatfs_v1_00_a if I use the older MB 6 > with OPB bus and opb_sysace or OPB2PLB bridge and xps_sysace. >
From: G�ran Bilski on 6 Oct 2008 04:12 Bah, The parameter is called C_INTERCONNECT and nothing else. G�ran "G�ran Bilski" <goran.bilski(a)xilinx.com> wrote in message news:gcch95$ill1(a)cnn.xsj.xilinx.com... > Hi, > > First, MicroBlaze v7 still handles OPB interface, the default is just PLB. > The parameter C_USE_INTERFACE determines what interface MicroBlaze should > use. > > I don't know the details of the XilFatfs library but I doubt that it only > works with the opb based version. > Have you tried using it for the xps based version? > > G�ran > > <lomtikster(a)gmail.com> wrote in message > news:e5ef2d98-e7e4-466e-87b5-274a90255a3b(a)k36g2000pri.googlegroups.com... >> Hi everyone, >> >> I would like to read a file from a CF card on xupv2p board using PLB >> and Microblaze 7.10d. There are a few questions that I am trying to >> answer. >> >> There is an xps_sysace interface controller v1.00a which seats between >> the PLB and the system ace CF peripheral and has sysace v1_11_a driver >> with functions like XSysAce_SectorRead and XSysAce_SectorWrite. >> However, I have not found any file system management soft like >> sysace_fopen and sysace_fread provided with XilFatfs FATFile System >> access library (xilfatfs_v1_00_a) that, from its doc, requires OPB >> SYSACE Interface Controller - Logicore module. How else would you read >> files from the a CF via PLB? >> Would it require modifying xilfatfs to support PLB? >> >> Probably I could reuse the xilfatfs_v1_00_a if I use the older MB 6 >> with OPB bus and opb_sysace or OPB2PLB bridge and xps_sysace. >> > >
From: jason.hy.wu on 6 Oct 2008 08:40 On Oct 6, 4:21 pm, lomtiks...(a)gmail.com wrote: > Hi everyone, > > I would like to read a file from a CF card on xupv2p board using PLB > and Microblaze 7.10d. There are a few questions that I am trying to > answer. > > There is an xps_sysace interface controller v1.00a which seats between > the PLB and the system ace CF peripheral and has sysace v1_11_a driver > with functions like XSysAce_SectorRead and XSysAce_SectorWrite. > However, I have not found any file system management soft like > sysace_fopen and sysace_fread provided with XilFatfs FATFile System > access library (xilfatfs_v1_00_a) that, from its doc, requires OPB > SYSACE Interface Controller - Logicore module. How else would you read > files from the a CF via PLB? > Would it require modifying xilfatfs to support PLB? > > Probably I could reuse the xilfatfs_v1_00_a if I use the older MB 6 > with OPB bus and opb_sysace or OPB2PLB bridge and xps_sysace. I am using MB 7.10a + plb + xps_sysace 1.00a with xilfatfs 1.00.a. I also use sysace_fopen, sysace_fread, sysace_fwrite for my sysace operations. So I don't think you need to redesign your system again.XSysAce_SectorRead and XSysAce_SectorWrite are the raw operations as I remember.
From: lomtikster on 9 Oct 2008 06:45 On Oct 6, 5:40 am, jason.hy...(a)gmail.com wrote: > On Oct 6, 4:21 pm, lomtiks...(a)gmail.com wrote: > > > > > Hi everyone, > > > I would like to read a file from a CF card on xupv2p board using PLB > > and Microblaze 7.10d. There are a few questions that I am trying to > > answer. > > > There is an xps_sysace interface controller v1.00a which seats between > > the PLB and the system ace CF peripheral and has sysace v1_11_a driver > > with functions like XSysAce_SectorRead and XSysAce_SectorWrite. > > However, I have not found any file system management soft like > > sysace_fopen and sysace_fread provided with XilFatfs FATFile System > > access library (xilfatfs_v1_00_a) that, from its doc, requires OPB > > SYSACE Interface Controller - Logicore module. How else would you read > > files from the a CF via PLB? > > Would it require modifying xilfatfs to support PLB? > > > Probably I could reuse the xilfatfs_v1_00_a if I use the older MB 6 > > with OPB bus and opb_sysace or OPB2PLB bridge and xps_sysace. > > I am using MB 7.10a + plb + xps_sysace 1.00a with xilfatfs 1.00.a. I > also use > sysace_fopen, sysace_fread, sysace_fwrite for my sysace operations. So > I don't > think you need to redesign your system again.XSysAce_SectorRead and > XSysAce_SectorWrite are the raw operations as I remember. Thanks Goran, Jason. It was great to hear the confirmation that xilfatfs worked for you with with the xps_sysace 1.00a. I came back to the original setup with PLB and xps_sysace and fixed all the compilation errors that I had. I also added the ddr ram plb controller and able to debug the code now. I have another issue now that am trying to figure out. For some reason, when reading the first file, the program is hitting a _vector_sw_exception which I get after exiting int update_bufcache(int sector, unsigned char *sector_buf, int dirty) function. This function is called multiple times before the exception is made. update_bufcache() is called by read_sector(), which in turn is read from read_from_file() Why could this exception happen? I've checked my address ranges and they don't seem to overlap. I formatted my CF card as suggested by the xupv2p's user guide for 128mb with mkdosfs and placed a few images there, and the exception happens on the first. As example, I am using the slideshow code available from xilinx/ digilent: http://www.digilentinc.com/Products/Detail.cfm?Prod=XUPV2P I disabled //XCache_EnableDCache(0xF000000F) and // XCache_EnableICache(0xF000000F) lines. Could it relate to the problem? My DDR ram has these disabled in Assembly System View too.
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