Corrections of some syntax errors

This commit is contained in:
Baudouin Chauviere 2018-10-09 14:46:43 -06:00
parent 8565e4e376
commit 1e04436cbb
1 changed files with 17 additions and 9 deletions

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@ -6,13 +6,14 @@ The goal of this example is just to make a first step into the software. The .bl
The .xml is currently on <layout auto="1.0"/> which means that the size depends on the .blif. Since the .blif is
almost empty, only 1 CLB will be generated.
![alt text](https://github.com/LNIS-Projects/OpenFPGA/tree/master/examplesfigures/example_1.png "Example_1_FPGA")
Schematic of the FPGA generated during example_1.
![alt text](https://github.com/LNIS-Projects/OpenFPGA/blob/master/examples/figures/example_1.png "Example_1_FPGA")
Schematic of the FPGA generated during example_1.
The CLB integrates a 4-inputs LUT, a FF and a MUX.
###**Things to understand in this example**
---
**Things to understand in this example**
Everything won't be explained in detail but few important structures (some common with the VPR project) are to be explained in order to build good architectures.
@ -24,13 +25,15 @@ Everything won't be explained in detail but few important structures (some commo
<spice_settings>
... all tech and spice parameters are defined here.
<module_spice_models>
... define the Basic Elements of the architecture and the modules that cannot be generated (i.e. the Flip-Flop) but need to be called.
... define the Basic Elements of the architecture and the modules that cannot
be generated (i.e. the Flip-Flop) but need to be called.
</module_spice_models>
</spice_settings>
<cblocks>
... complex blocks
<complexblocklist>
... here we define the hierarchy of the primitive blocks and interconnect them together
... here we define the hierarchy of the primitive blocks and interconnect them
together
<pb_type>
... defines the primitive block
</pb_type>
@ -49,14 +52,19 @@ Example_2's goal is to introduce the slices, the interconnections which can be g
In this case, we generate a 3x3 FPGA with 4 slices. The LUTs are 6-inputs ones similarly to the ones used in the industry.
There is a feedbeck-loop from the output of the slices to the input MUXs
![alt text](https://github.com/LNIS-Projects/OpenFPGA/tree/master/examplesfigures/example_2_the_CLB_.png "Example_2_CLB")
![alt text](https://github.com/LNIS-Projects/OpenFPGA/blob/master/examples/figures/example_2_the_CLB.png "Example_2_CLB")
Schematic showing the CLB generated in this example.
---
**Things to understand in this example**
###**Things to understand in this example**
```xml
<layout width="3" height="3"/> <!-- Manual mode of the layout allowing us to choose the number of CLBs -->
<complete name="crossbar" input="clb.I fle[3:0].out" output="fle[3:0].in" spice_model_name="mux_2level"> <!-- Defines how we apply the feedback on the inputs of the slices -->
<complete name="crossbar" input="clb.I fle[3:0].out" output="fle[3:0].in" spice_model_name="mux_2level">
<!-- Defines how we apply the feedback on the inputs of the slices -->
<delay_constant max="53.44e-12" in_port="clb.I" out_port="fle[3:0].in" />
<delay_constant max="53.44e-12" in_port="fle[3:0].out" out_port="fle[3:0].in" />
</complete>