This document describes the default bitstreams that come preloaded with every SVEC card. As there are two FPGAs on the SVEC, there are two default bitstreams:
This document describes the default bitstreams that come preloaded with every SVEC card. As there are two FPGAs on the SVEC, there are two default bitstreams:
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@@ -114,14 +118,14 @@ Programming the Application FPGA directly via VME involves the following steps:
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@@ -114,14 +118,14 @@ Programming the Application FPGA directly via VME involves the following steps:
@item Exit bootloader mode by writing 1 to @code{CSR.EXIT} bit.
@item Exit bootloader mode by writing 1 to @code{CSR.EXIT} bit.
@end itemize
@end itemize
A code example is available in the repository (@pxref{repo_link,,2}). Successful gateware download to the Application FPGA is indicated by turning on the ``AFPGA DONE'' LED in the middle of the PCB.
A code example is available in the repository (@pxref{repo_link,,3}). Successful gateware download to the Application FPGA is indicated by turning on the ``AFPGA DONE'' LED in the middle of the PCB.
@section Programming the Flash
@section Programming the Flash
The SFPGA also allows raw access to the Flash memory (M25P128) via the @code{FAR} register. The code below shows how to execute a single SPI transaction (command + N data bytes).
The SFPGA also allows raw access to the Flash memory (M25P128 or MT25QL128 in newer SVEC cards) via the @code{FAR} register. The code below shows how to execute a single SPI transaction (command + N data bytes).
Low-level details about programming M25Pxxx series Flash memories can be found in their datasheets (@pxref{m25p_datasheet,,1}). A simple VME flasher is provided in @code{software/vme-flasher} directory.
Low-level details about programming the Flash memories can be found in their datasheets (@pxref{m25p_datasheet,,1} and @pxref{mt25_datasheet,,2}). A simple VME flasher is provided in @code{software/vme-flasher} directory.
@b{Note 1:} It is advised to protect the region of the flash containing the system FPGA bitstream from being accidentally overwritten, as this will result in rendering the card unusable and will require re-programming the flash via JTAG. Details on memory protection can be found in the M25P series datasheet.
@b{Note 1:} It is advised to protect the region of the flash containing the system FPGA bitstream from being accidentally overwritten, as this will result in rendering the card unusable and will require re-programming the flash via JTAG. Details on memory protection can be found in the Flash memory datasheet.
@b{Note 2:} The freshly-programmed bitstreams will be loaded into the FPGAs after power-cycling the card. In order to avoid the power cycle, one can boot the Application FPGA directly using the same bitstream.
@b{Note 2:} The freshly-programmed bitstreams will be loaded into the FPGAs after power-cycling the card. In order to avoid the power cycle, one can boot the Application FPGA directly using the same bitstream.
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@@ -134,7 +138,7 @@ The flash memory of the SVEC contains 16 Megabytes of data, that is 65536 pages
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@@ -134,7 +138,7 @@ The flash memory of the SVEC contains 16 Megabytes of data, that is 65536 pages
@item @code{0x601000 - 0xffffff}: Free space, foreseen for the AFPGA's private data storage.
@item @code{0x601000 - 0xffffff}: Free space, foreseen for the AFPGA's private data storage.
@end itemize
@end itemize
An example script for building the default flash filesystem (containg the bootloader and golden bitstreams) is located in the @code{software/sdb-flash} subdirectory in the SVEC project's repository(@pxref{repo_link,,2}). Presence of the SDB descriptor table at @code{0x600000} is checked by the bootloader to prevent booting up from a corrupted or unprogrammed flash.
An example script for building the default flash filesystem (containg the bootloader and golden bitstreams) is located in the @code{software/sdb-flash} subdirectory in the SVEC project's repository(@pxref{repo_link,,3}). Presence of the SDB descriptor table at @code{0x600000} is checked by the bootloader to prevent booting up from a corrupted or unprogrammed flash.
@b{Note:} Both bitstreams must be in raw (@code{.bin} file extension) format. @code{.bit}, @code{.mcs}, @code{.xsvf} and other formats will not work.
@b{Note:} Both bitstreams must be in raw (@code{.bin} file extension) format. @code{.bit}, @code{.mcs}, @code{.xsvf} and other formats will not work.
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@@ -240,7 +244,7 @@ Certain older SVEC cards have been shipped with the first version of the bootloa
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@@ -240,7 +244,7 @@ Certain older SVEC cards have been shipped with the first version of the bootloa
@item Open the right-click menu in the main work area and select ``Initialize chain'' or press Ctrl+I.
@item Open the right-click menu in the main work area and select ``Initialize chain'' or press Ctrl+I.
@item Right click on the ``SPI/BPI ?'' box above the ``xc6slx9'' FPGA and select ``Add SPI/BPI Flash''.
@item Right click on the ``SPI/BPI ?'' box above the ``xc6slx9'' FPGA and select ``Add SPI/BPI Flash''.
@item Pick the @code{svec-bootloader-[latest release].mcs} file.
@item Pick the @code{svec-bootloader-[latest release].mcs} file.
@item Select flash type: SPI PROM, M25P128, data width: 1.
@item Select flash type: SPI PROM, M25P128 (or N25Q128 if you have a newer SVEC with a MT25QL128 Flash memory chip), data width: 1.
@item Right click on the ``FLASH'' chip above the ``xc6slx9'' and select ``Program''. Select the ``Verify'' option and click OK.
@item Right click on the ``FLASH'' chip above the ``xc6slx9'' and select ``Program''. Select the ``Verify'' option and click OK.
@item If everything went fine, ``Programming succeeded'' message will appear.
@item If everything went fine, ``Programming succeeded'' message will appear.
@item Reboot the VME crate to use the new bootloader.
@item Reboot the VME crate to use the new bootloader.
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@@ -307,6 +311,8 @@ NET "flash_miso_i" IOSTANDARD = "LVCMOS33";
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@@ -307,6 +311,8 @@ NET "flash_miso_i" IOSTANDARD = "LVCMOS33";
@enumerate
@enumerate
@anchor{m25p_datasheet}
@anchor{m25p_datasheet}
@item @uref{http://www.micron.com/parts/nor-flash/serial-nor-flash/m25p128-vme6gb} - M25P series SPI Flash memory datasheet
@item @uref{http://www.micron.com/parts/nor-flash/serial-nor-flash/m25p128-vme6gb} - M25P series SPI Flash memory datasheet
@anchor{mt25_datasheet}
@item @uref{https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-a/mt25q_qlhs_l_128_aba_0.pdf} - MT25QL128ABA series SPI Flash memory datasheet
@anchor{repo_link}
@anchor{repo_link}
@item @uref{http://www.ohwr.org/projects/svec/repository/} - Git repository containing this document's sources and revision history (@code{doc} subdirectory) and bootloading code examples (@code{software/sveclib} subdirectory).
@item @uref{http://www.ohwr.org/projects/svec/repository/} - Git repository containing this document's sources and revision history (@code{doc} subdirectory) and bootloading code examples (@code{software/sveclib} subdirectory).
