topic Re: Correct COM parameters for LPC 'Periph_DMIC' example in LPC Microcontrollers

Correct COM parameters for LPC 'Periph_DMIC' example

jameswhitney — Wed, 27 Feb 2019 19:00:00 GMT

Greetings,

I have built the 'periph_dmic' example from LPC_Open for the LPC54114. This example streams numerical data from the UART to a terminal, as opposed to the 'i2s_periph_dmic' example which streams audio data out of the Wolfson CODEC. I think I have my terminal (PuTTY) correctly configured, but I'm still getting a rolling screen of garbled characters.

My PuTTY settings are:

Baud rate: 750000

Data bits: 8

Stop bits: 1

Parity: None

Flow control: XON/XOFF

I can tell that the program is running as when I 'tap' near the mic I can see the quantity of garbled characters increase/decrease.

Wanted to see if I'm missing something with the settings.

Thanks,

Jim

Re: Correct COM parameters for LPC 'Periph_DMIC' example

soledad — Fri, 01 Mar 2019 15:41:21 GMT

Hi,

The periph_i2s_dmic demo requires the MAO board. It contains the WM8904 CODEC that is used for this demo.

This demo requires the on the MAO board, JP-3 jumper must be set on 1-2.

In addition try using the following settings:

Baud rate: 115200

Data bits: 8

Stop bits: 1

Parity: None

Flow control: None

Have a great day,
Sol

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Re: Correct COM parameters for LPC 'Periph_DMIC' example

jameswhitney — Fri, 01 Mar 2019 16:39:48 GMT

Hello, Sol,

'periph_dmic' example *is not* the same as the 'periph_i2s_dmic' example. The i2s example sends data out of the CODEC on the MAO board. The periph_dmic writes data to the screen via UART w/o audio output. The UART setting that I found in the code is 750000 which is why I had a question.

Thanks,

Jim