This is done to better reflect the interface of the module (structured Wishbone).
The documentation of the module is also changed in this respect.

It was causing the simulation to fail with designs containing a xwb_register_link component.

Using the volatile configuration register to configure a flash chip
is a bad idea. The problem is that if the FPGA is reset, the flash
may be in a state inconsistent with what the FPGA requires to boot.

The correct solution is to configure the non-volatile configuration
register on the chip to what the FPGA expects on power-on. Then use
these same settings inside the flash core.

Going this route makes it necessary for software to be able to set
the non-volatile configuration register. Rather than making the core
even more complicated than it is, I have elected to add a FIFO which
software can fill to issue custom SPI commands. Since erase can only
be done from software anyway, I removed this code and let erase use
the custom command FIFO.

This is done by adding a generic to the entity, which is connected directly to
the gc_fsm_watchdog component instantiated within the wb_i2c_bridge. The user
should calculate the appropriate watchdog timeout value and set it via this
generic.

The instantiation template in the wishbone_pkg is also updated.

Signed-off-by: Theodor Stana <t.stana@cern.ch>

Miguel Jimenez Lopez authored 11 years ago and Grzegorz Daniluk committed 11 years ago

This change is necessary for network control/monitor tool in order to read the GUI command output.
The GUI command output can not be stored into a 1024 bytes fifo.

wb_irq_slave: added clear and enable registers

Theodor-Adrian Stana authored 11 years ago and Tomasz Wlostowski committed 11 years ago

- I2C slave component now samples SDA line one rising SCL and changes
states and shifts out bits on its falling edge
- I2C slave component has clearer status outputs
- bridge component changed to reflect changes in I2C slave interface
- bridge component also returns to IDLE state on I2C stop condition, as
reflected by the I2C slave

Signed-off-by: Theodor Stana <t.stana@cern.ch>
Signed-off-by: Tomasz Włostowski <tomasz.wlostowski@cern.ch>

Theodor-Adrian Stana authored 11 years ago and Tomasz Wlostowski committed 11 years ago

- gc_i2c_slave     -- generic I2C slave to be used with a processor or tied to a
                      Wishbone interface
- gc_glitch_filter -- glitch filter with selectable number of taps
- wb_i2c_bridge    -- I2C bridge implementing the protocol defined with ELMA
                      for monitoring VME crates
- wb_xil_multiboot -- module that accesses the Spartan-6 configuration logic
                      for reconfiguring the FPGA using MultiBoot

Doc files for each of these modules can be found in the doc/ folder.

Signed-off-by: Theodor Stana <t.stana@cern.ch>
Signed-off-by: Tomasz Włostowski <tomasz.wlostowski@cern.ch>

c_status_time was one cycle longer than it should be!
this led to the arria5 requiring g_dummy_time-1 in c_vstatus_data
==> after fixing: must increase g_input_to_output_cycles on arria5

there was also a wrong calculation for s_wip with single-lane mode
it was working also by luck because WEL and WIP are usually set
together and are side-by-side, thus masking the c_status_time bug.

Matthieu Cattin authored 12 years ago and Tomasz Wlostowski committed 11 years ago

Supports sdb_repo_url and sdb_synthesis records.

sdb-crossbar: add support for meta-information records.
A new generic (g_info) is available to add an array of meta-inforamtion
records to the sdb rom.

sdb-crossbar: add boolean generic to use meta-information records.
Can't find out how to initialise an array with a null-range.

wishbone_pkg: add default value to meta-information generic.

sdb-crossbar: fix conditional constant declaration

sdb-crossbar: use a function to initialise number of info entries constant.

sdb-crossbar: fix syntax error in function.

wishbone_pkg: add embed/extract function for repo-url and synthesis records.

wishbone_pkg: Change some meta-info fields to string and add string manip functions.

wishbone_pkg: Change syn_commit_id type to string.

wishbone_pkg: Fix syntax error.

wishbone_pkg: Fix index bug in string manip functions.

wishbone_pkg: Fix range bug in string manip function.

wishbone_pkg: add integration record support.

sdb-crossbar: Fix range issue with meta-info records.

Conflicts:

	modules/wishbone/wishbone_pkg.vhd

In the past we used a generic to set the initial memory contents on altera.
Unfortunately, quartus compiles big generics slowly (read: hours).
Now we can load from a .mif file instead, which is much faster (seconds).
Thus, this old option is no longer needed.