Joris van Rantwijk
398dca67b6
Fix bugs in AC97 output for Atlys board.
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* Fix bugs in AC97 synchronization.
* Fix bugs in AC97 reset.
* Reduce audio volume to -12 dB.
* Set correct voltage for reset button on Atlys board.
2016-04-23 11:37:42 +02:00
Joris van Rantwijk
8bd2d389ef
Add Python program to test core via serial port.
2016-04-23 00:27:34 +02:00
Joris van Rantwijk
e402b88b3d
Minor change to atlys toplevel.
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* Rename .vhd -> .vhdl
* Reset phase of audio tone.
2016-04-22 21:06:40 +02:00
Joris van Rantwijk
01c0832324
Integrate AC97 output in Atlys top-level.
2016-04-22 19:34:39 +02:00
Joris van Rantwijk
47e53fff56
Add AC97 output driver.
2016-04-22 17:20:13 +02:00
Joris van Rantwijk
9c73463282
Add top-level test design for Digilent Atlys board.
2016-04-22 09:42:48 +02:00
Joris van Rantwijk
331211f34b
Fix bugs in test_sincos_serial.vhdl.
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* Allow choice of core at run-time instead of synthesis-time.
* Fix mistake in serial port RX machine.
2016-04-21 22:20:32 +02:00
Joris van Rantwijk
84c92fea95
Fix analysis errors in test_sincos_serial.vhdl.
2016-04-21 20:36:11 +02:00
Joris van Rantwijk
b21a696b71
Minor textual improvements in README.
2016-04-21 20:30:53 +02:00
ff860d4ae3
Update README after adding extra phase bit.
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* Update accuracy figures based on simulation with extra phase bit.
* Update FPGA resource information based on synthesis run with extra phase bit.
2016-04-21 20:26:03 +02:00
Joris van Rantwijk
fe5dfa9133
Fix mistakes in changes related to phase_extrabits.
2016-04-20 23:46:42 +02:00
Joris van Rantwijk
ba096abf16
Make internal phase accuracy configurable.
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* Add generic "phase_extrabits" to set internal accuracy of phase remainder.
* Increase default value of phase_extrabits from 1 to 2.
2016-04-20 23:46:24 +02:00
Joris van Rantwijk
8719b47c6f
Finish synthesizable test design.
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Finish implementation of test_sincos_serial.
It has not been tested at all yet.
2016-04-20 23:42:30 +02:00
Joris van Rantwijk
dcdac2e0af
* Add accuracy of 24-bit sine generator based on simulation results.
2016-04-19 23:55:31 +02:00
0b723c1599
* Add Vivado project files for dry-run on Virtex-7.
2016-04-19 23:36:10 +02:00
12ad25422b
* New synthesis dry-run for Spartan-6.
2016-04-19 23:36:10 +02:00
385c9f5ed2
* Finally found a way to describe the lookup table such that both
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ISE and Vivado infer a dual-port block RAM.
2016-04-19 23:36:10 +02:00
2ed074011e
* Change description of lookup table to force inference of ROM block
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on Virtex-7 with Vivado.
2016-04-19 23:36:10 +02:00
Joris van Rantwijk
40c6639593
* Update resource information based on FPGA synthesis runs.
2016-04-19 23:23:17 +02:00
Joris van Rantwijk
f2471aa544
* Add notes about FGA resources from dry-run on Spartan-6.
2016-04-18 23:48:45 +02:00
b2306b98a7
* Add ISE project files for dry-run on Spartan-6.
2016-04-18 23:38:54 +02:00
e1d1e4cb09
* Fix missing type conversions in top-level synthesis files.
2016-04-18 23:37:23 +02:00
22e481f3e6
* Add trivial top-level designs for synthesis dry-run.
2016-04-18 22:57:41 +02:00
Joris van Rantwijk
e241a78fa0
* Start work on README file.
2016-04-18 22:44:50 +02:00
Joris van Rantwijk
2343a70c7d
* Evaluate sine against non-phase-adjusted reference which is a little
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more pessimistic but also a little more fair.
2016-04-18 22:21:35 +02:00
Joris van Rantwijk
5e02c373de
* Implement serial port interface in test design.
2016-04-18 21:14:31 +02:00
Joris van Rantwijk
5b72e7f3f3
* Start work on synthesizable tester for sin/cos core.
2016-04-16 22:56:42 +02:00
Joris van Rantwijk
cf4e802edf
* Add comment in simulation Makefile.
2016-04-16 22:18:41 +02:00
Joris van Rantwijk
5892955445
* Reorganize comments at top of wrappers for sin/cos generator.
2016-04-16 22:16:20 +02:00
Joris van Rantwijk
8796491f37
* Further reduction of multiplier width.
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At this point it very slightly affects output quality.
This change makes it possible to implement up to 24-bit sine generators
using just 18x18-bit multipliers (i.e. Spartan-6).
2016-04-16 09:10:27 +02:00
Joris van Rantwijk
7ce5b82ff0
* eval_sine_quality.py: Add Python program to evaluate sine waveform.
2016-04-16 09:09:28 +02:00
Joris van Rantwijk
aa8f0217d3
* Full (all-input) test bench for sincos_gen_d18_p20.
2016-04-14 23:56:19 +02:00
Joris van Rantwijk
d2a948f34e
* Fix mistake in 2nd order Taylor correction.
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* Fix mistake in testbench for 24-bit sine generator.
2016-04-14 23:14:58 +02:00
Joris van Rantwijk
15518ce6f7
* Add test-bench for superficial check of 24-bit sine generator.
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* Minor improvement in test-bench for 18-bit sine generator.
2016-04-14 23:06:21 +02:00
Joris van Rantwijk
42046dc818
* Add wrapper for 24-bit sine generator.
2016-04-14 22:53:40 +02:00
Joris van Rantwijk
9873f91e8e
* Further reduction of multiplier width.
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* Add more comments.
2016-04-14 22:49:32 +02:00
Joris van Rantwijk
a3d8939440
* Add comments.
2016-04-14 00:42:58 +02:00
Joris van Rantwijk
2dbc6d44db
* Reduce width of sin/cos input to multiplier by 1 bit.
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* This has no significant effect on accuracy, but reduces multiplier width.
2016-04-14 00:05:52 +02:00
Joris van Rantwijk
9f4bb7f9b0
* Increase precision of delta_phase term by 1 bit.
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* This improves accuracy of 1st order Taylor variant to less than 1.0 lsb peak deviation.
* Add comments.
2016-04-13 23:32:02 +02:00
Joris van Rantwijk
12b896c2df
Fix mistake in Taylor correction.
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This improves accuracy, but there is probably room for further improvement by avoiding accumulation of rounding errors.
2016-04-11 23:21:25 +02:00
Joris van Rantwijk
7de76c6696
Reduce amplitude to avoid numeric overflow.
2016-04-11 21:28:17 +02:00
Joris van Rantwijk
0685db9d92
Document latency of sincos core.
2016-04-10 01:27:24 +02:00
Joris van Rantwijk
e8fdb3cff1
Full (all-input) test bench for sincos_gen_d18_p20.
2016-04-10 01:26:05 +02:00
Joris van Rantwijk
7703971a4d
Add Makefile for simulation with GHDL.
2016-03-24 23:55:32 +01:00
Joris van Rantwijk
e078fffd3e
Test bench for sincos_gen_d18_p20.
2016-03-24 23:37:00 +01:00
Joris van Rantwijk
8090886ab0
VHDL wrapper for sin/cos function with 18-bit sin/cos, 20-bit phase.
2016-03-24 23:34:20 +01:00
Joris van Rantwijk
59ec0505ab
Main VHDL file of sin/cos function core.
2016-03-24 23:32:59 +01:00
Joris van Rantwijk
Joris van Rantwijk