OpenCores
URL https://opencores.org/ocsvn/minsoc/minsoc/trunk

Subversion Repositories minsoc

[/] [minsoc/] - Rev 22

Rev

Go to most recent revision

Filtering Options

Clear current filter

Rev Log message Author Age Path
22 Status progress and howto pdf documents were not commited, there now. rfajardo 3952d 23h /minsoc/
21 Including the first draft project documentation. How to and status progress docs are now separate from documentation. rfajardo 3953d 00h /minsoc/
20 minsoc_defines.v had a semicolon at the end of the two reset polarity definitions.

minsoc_top had a signal array for two different signals which was for backward compatibility. The compatible debugging module is so old that there is no reason for keeping it.

Documentation has been updated to better explain how to use the definitions files, minsoc_defines.v and or1200_defines.v. An example for Altera devices has been added too.
rfajardo 3960d 01h /minsoc/
19 Documentation update. How To: 7) Examples:
-Spartan 3E Starter Kit no Ethernet has been already tested and is known to work.
-Spartan 3E Starter Kit with Ethernet not yet.
-change of sw/support/orp.ld cannot be done by only commenting and uncommenting line, the instruction, documentation line, which said so has been removed.
-Further possibilities -> Further area optimization possibilities.
rfajardo 3991d 05h /minsoc/
18 Deprecated comments removed from the file listing files. rfajardo 4023d 05h /minsoc/
17 Ethernet testbench speed penalty solved. Now Ethernet of testbench and minsoc can be enabled by only uncommenting `define ETHERNET on minsoc_defines.v.

send_mac, get_mac and uart_send tasks have been included/improved. Also a testbench, which works for both included firmwares is added. (eth and uart)

If ETHERNET is defined for the SoC, both firmwares will complete successfully. If not, the eth firmware will stall when trying to access the Ethernet module.
rfajardo 4025d 00h /minsoc/
16 Further initialization improvement of non-used signals, setting interrupt signals to 0 if module is not used. rfajardo 4030d 04h /minsoc/
15 Including verified pinout for external spi flash on spartan3a dsp kit to its correspondent ucf constraint file. rfajardo 4030d 21h /minsoc/
14 Wishbone error signal of Ethernet core was not tied to ground if Ethernet was disabled. Solved now. rfajardo 4039d 05h /minsoc/
13 Updating spartan3e_starter_kit.ucf so that it does not deliver errors on mapping. Moreover it has been changed to off the shelf only have uart support. Ethernet support and generic JTAG can be added by uncommenting the corresponding lines. rfajardo 4040d 05h /minsoc/
12 1) spi_top.v:
-TX_NEGEDGE bug reported and recommended solution by Blaise Gassend. (Thank you)
2) minsoc howto extended to:
-synthesis of minsoc for Spartan3E Starter Kit with Ethernet
3) spartan3e_starter_kit.ucf changed:
-it had problems regarding pin definitions and IO logic types for mapping and place&route. Working flawless now.
rfajardo 4042d 20h /minsoc/
11 External interrupt processing was being run multiple times because:
-external level interrupts have to be cleared
-internal interrupt status register has to be cleared
Since internal interrupt status register was being cleared before external level interrupts clearance, these internal interrupt status was being overwritten inbetween.

Solution:
-move status register reset to end of interrupt handler instead of beginning.

Testbench signal uart_srx initialized now.
rfajardo 4050d 00h /minsoc/
10 Added a file containing models for each FPGA memory instances used in or1200. The file is in bench/verilog/sim_lib/fpga_memory_primitives.v.

With it, people who change the or1200_defines.v inside of the project structure will still be able to simulate, using house-made models, not from manufacturers.

minsoc_bench.v had to be extended by the task, init_fpga_memory, to initialize the dual or two port memories instances of or1200. This has to be done based on the type of memory used, so many different instantiations based on definitions. Somehow or1200 expects all memory values to be 0 upon start, so this is necessary.
rfajardo 4064d 00h /minsoc/
9 Tiny change to testbench gain:
-uart_srx is now reg for future testbench serial input to SoC.
rfajardo 4065d 22h /minsoc/
8 Cosmetic changes to minsoc_bench.v:
-reset and clock initialization are included into the main initial block, it had an own block before
rfajardo 4065d 22h /minsoc/
7 Some changes:
-wb_cabs removed from minsoc_top.v and minsoc_tc_top.v
-added reset polarity control to minsoc_defines.v through:
-POSITIVE_RESET
-NEGATIVE_RESET
-minsoc_onchip_ram_top.v does not use
minsoc_onchip_ram.v oe signals (output enable) anymore,
which are implemented as tristate buffers. Now
minsoc_onchip_ram_top.v has a generated MUX, which
has an arbitrary number of inputs and 1 output.
Input are the internal output of the onchip_rams,
output the wb_dat_o.
rfajardo 4070d 23h /minsoc/
6 No implementation relevant changes.

Testbench used generic memory from minsoc_onchip_ram.v has been changed to reflect the correct model of the FPGA's onchip rams: address register and write accesses are sensitive to rising clock edge.

Documentation updated to reflect another trial and next steps to speed up the memory access from 2 clocks to 1. The negated clock approach is not standard. The right way to do it would be to use the wishbone signals cti and bte and change the minsoc_onchip_ram_top.v.
rfajardo 4075d 05h /minsoc/
5 vpi path corrected in how to. rfajardo 4081d 04h /minsoc/
4 minsoc_bench.v had a big memory declaration to load the firmware, which was not necessary.

jp-io-vpi.vpi has to be compiled for different systems so removed from the project. Documentation now explains how to do it.

Documentation now includes:
-vpi module compilation
-gdb patch for adv_jtag_bridge
-ideas for future work on minsoc (To Do v.2)
rfajardo 4081d 05h /minsoc/
3 Changed documentation
-advice to compile sw/utils before compiling target software
rfajardo 4085d 03h /minsoc/

1 2 Next >

Show All

powered by: WebSVN 2.1.0

© copyright 1999-2020 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.