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  Topic: Exact timing couter
frank

Replies: 3
Views: 130

PostForum: Algorithm development   Posted: Mon Oct 16, 2017 12:29 pm   Subject: Exact timing couter
OK that explains the *256.

Yes, read from "buffer" as it will have wrapped around the circular buffer having been delayed for exactly 32768 sample periods then write over it with the new data. This ...
  Topic: Exact timing couter
frank

Replies: 3
Views: 130

PostForum: Algorithm development   Posted: Mon Oct 16, 2017 9:33 am   Subject: Exact timing couter
Few things to consider:

1. The assembler allocates N+1 memory locations so you can have separate read and write pointers but you want to use all 32768 locations to get a full second so you will wan ...
  Topic: Board bringup issues
frank

Replies: 12
Views: 228

PostForum: FV-1 hardware questions   Posted: Sun Oct 08, 2017 9:10 am   Subject: Board bringup issues
We would need the schematic of the programmer and the PCB to figure out what happened. And those clones often do not handle voltages properly.
  Topic: Board bringup issues
frank

Replies: 12
Views: 228

PostForum: FV-1 hardware questions   Posted: Sat Oct 07, 2017 1:54 pm   Subject: Board bringup issues
There are pull-ups in the FV-1 on SDA and SCL so the I2C bus is not lacking them they are just internal.
  Topic: Board bringup issues
frank

Replies: 12
Views: 228

PostForum: FV-1 hardware questions   Posted: Fri Oct 06, 2017 7:30 am   Subject: Board bringup issues
Try using the internal program set to make sure the PCB and chip are functioning. If they are then try the EEPROM in the dev board and see if it works there.
  Topic: Indicator LED connected to DAC
frank

Replies: 3
Views: 328

PostForum: Algorithm development   Posted: Wed Sep 13, 2017 8:00 am   Subject: Indicator LED connected to DAC
The DAC outputs are not designed to drive very much current so it is better to use a buffer with a high impedance which then drives the LED.
  Topic: Easy Hard Clip (Max Value) of Accumulator
frank

Replies: 2
Views: 269

PostForum: FV-1 software questions   Posted: Wed Sep 06, 2017 10:22 am   Subject: Easy Hard Clip (Max Value) of Accumulator
If 0.5 is the actual desired clip value and the value is in ACC then try something like:

sof -2.0,0
sof -0.5,0
  Topic: Indicator LED connected to DAC
frank

Replies: 3
Views: 328

PostForum: Algorithm development   Posted: Tue Sep 05, 2017 12:00 pm   Subject: Indicator LED connected to DAC
No, nothing bad is happening to the chip in this case, it is just the clip circuit detecting the large values. If it bothers you just lower the max output to below clipping.
  Topic: NAMM 2017
frank

Replies: 32
Views: 5152

PostForum: FV-1 hardware questions   Posted: Fri Sep 01, 2017 9:48 am   Subject: NAMM 2017
No chip is perfect for everything and unless you are doing very long delays a second per channel is a lot. Most delay effects (reverb, chorus, flanger, etc.) work with rather short delay times so 2 or ...
  Topic: NAMM 2017
frank

Replies: 32
Views: 5152

PostForum: FV-1 hardware questions   Posted: Thu Aug 31, 2017 12:00 pm   Subject: NAMM 2017
External CODEC, allows you to select the quality/cost trade off on a per product basis.
  Topic: Tap Tempo tremolo again
frank

Replies: 5
Views: 528

PostForum: Algorithm development   Posted: Mon Jul 31, 2017 6:22 pm   Subject: Tap Tempo tremolo again
Then I would try solving for 1/Kf instead so solve r=x/(8*pi) then do the 1/r to get the result. Since 1/8*pi is a constant it becomes a multiply
  Topic: Tap Tempo tremolo again
frank

Replies: 5
Views: 528

PostForum: Algorithm development   Posted: Mon Jul 31, 2017 5:14 pm   Subject: Tap Tempo tremolo again
So if the input X goes 0.05 to 1.0 and needs to give an output of 502 to 26 and it is linear then the equation:

527.05263 - X*501.05263

Should give a result between 502 and 26 for an input range ...
  Topic: 3 error in m-16 code
frank

Replies: 7
Views: 589

PostForum: FV-1 software questions   Posted: Mon Jul 24, 2017 7:51 am   Subject: 3 error in m-16 code
You need to check that your chip supports timer 2 and the associated registers and if it does then as the maker of the assembler why it is throwing errors. We can only help with the FV-1 its self.
  Topic: 3 error in m-16 code
frank

Replies: 7
Views: 589

PostForum: FV-1 software questions   Posted: Sat Jul 22, 2017 3:37 pm   Subject: 3 error in m-16 code
It does not matter which assembler as long as it supports the proper 8052 variant. Check that you are assembling for the correct chip.
  Topic: hex of program
frank

Replies: 3
Views: 380

PostForum: FV-1 software questions   Posted: Sat Jul 22, 2017 3:35 pm   Subject: hex of program
Yes
 
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