I want to integrate the PDM microphone with thingy53, I found no particular sample code for it
Would be needing help from scratch
I want to integrate the PDM microphone with thingy53, I found no particular sample code for it
Would be needing help from scratch
Hi Rakshita
Have you tested the DMIC sample in the SDK?
It is not officially supported on the Thingy53, but it does support the nRF5340DK. If you copy and rename the nrf5340dk_nrf5340_cpuapp.overlay file to thingy53_nrf5340_cpuapp.overlay, and change the pins as necessary, I would expect the example to work on the thingy as well.
Not sure what you mean about repeating output? If I understand you correctly the clock output from the nRF53 is fine, but the data from the microphone seems wrong? Would you be able to attach a trace/scope capture?
Best regards
Torbjørn
dmic is not working with thingy53 even after changing the overlay files
Hi Rakshita
I set the PDM_CLK to P0.08 and the data pin to P0.09, as you can see from the overlay:
psels = <NRF_PSEL(PDM_CLK, 0, 8)>, <NRF_PSEL(PDM_DIN, 0, 9)>;
Which SDK version are you using to build it?
Can you share the full build output with me so I can try to figure out what is happening?
Please use the Insert -> Code feature in devzone to add a larger block of text, or attach the build output as a text file.
Best regards
Torbjørn
Yes but as per the thingy's schematic the clk pin is P1.09 and data pin is P0.27
sdk v2.5.2
Executing task: nRF Connect: Build: dmic_thingy53/build (active) Building dmic_thingy53 west build --build-dir c:/nrf/samples/bluetooth/dmic_thingy53/build c:/nrf/samples/bluetooth/dmic_thingy53 -- west build: generating a build system Loading Zephyr default modules (Zephyr base (cached)). -- Application: C:/nrf/samples/bluetooth/dmic_thingy53 -- CMake version: 3.20.5 -- Cache files will be written to: C:/ncs/v2.5.2/zephyr/.cache -- Zephyr version: 3.4.99 (C:/ncs/v2.5.2/zephyr) -- Found west (found suitable version "1.1.0", minimum required is "0.14.0") -- Board: thingy53_nrf5340_cpuapp -- Found host-tools: zephyr 0.16.1 (C:/ncs/toolchains/c57af46cb7/opt/zephyr-sdk) -- Found toolchain: zephyr 0.16.1 (C:/ncs/toolchains/c57af46cb7/opt/zephyr-sdk) -- Found BOARD.dts: C:/ncs/v2.5.2/zephyr/boards/arm/thingy53_nrf5340/thingy53_nrf5340_cpuapp.dts -- Found devicetree overlay: C:/nrf/samples/bluetooth/dmic_thingy53/boards/thingy53_nrf5340_cpuapp.overlay devicetree error: pinctrl-names property in /soc/peripheral@50000000/pdm@26000 in C:/ncs/v2.5.2/zephyr/misc/empty_file.c has 1 strings, expected 2 strings -- In: C:/nrf/samples/bluetooth/dmic_thingy53/build/zephyr, command: C:/ncs/toolchains/c57af46cb7/opt/bin/python.exe;C:/ncs/v2.5.2/zephyr/scripts/dts/gen_defines.py;--dts;C:/nrf/samples/bluetooth/dmic_thingy53/build/zephyr/zephyr.dts.pre;--dtc-flags;'-Wno-unique_unit_address_if_enabled';--bindings-dirs;C:/ncs/v2.5.2/nrf/dts/bindings;C:/ncs/v2.5.2/zephyr/dts/bindings;--header-out;C:/nrf/samples/bluetooth/dmic_thingy53/build/zephyr/include/generated/devicetree_generated.h.new;--dts-out;C:/nrf/samples/bluetooth/dmic_thingy53/build/zephyr/zephyr.dts.new;--edt-pickle-out;C:/nrf/samples/bluetooth/dmic_thingy53/build/zephyr/edt.pickle;--vendor-prefixes;C:/ncs/v2.5.2/nrf/dts/bindings/vendor-prefixes.txt;--vendor-prefixes;C:/ncs/v2.5.2/zephyr/dts/bindings/vendor-prefixes.txt -- Configuring incomplete, errors occurred! CMake Error at C:/ncs/v2.5.2/zephyr/cmake/modules/dts.cmake:279 (message): gen_defines.py failed with return code: 1 Call Stack (most recent call first): C:/ncs/v2.5.2/zephyr/cmake/modules/zephyr_default.cmake:129 (include) C:/ncs/v2.5.2/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:66 (include) C:/ncs/v2.5.2/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:97 (include_boilerplate) CMakeLists.txt:5 (find_package) FATAL ERROR: command exited with status 1: 'C:\ncs\toolchains\c57af46cb7\opt\bin\cmake.EXE' -DWEST_PYTHON=C:/ncs/toolchains/c57af46cb7/opt/bin/python.exe '-Bc:\nrf\samples\bluetooth\dmic_thingy53\build' -GNinja '-Sc:\nrf\samples\bluetooth\dmic_thingy53' * The terminal process terminated with exit code: 1. * Terminal will be reused by tasks, press any key to close it.
Can you tell me what to do next, I am kind of stuck on this microphone thing only
There is also an error in main function
Can u please help me out to solve it
There is also an error in main function
Can u please help me out to solve it
In main.c file dmic_dev is actually not present in common.dtsi file so did u added it externally
Hi
Rakshita said:In main.c file dmic_dev is actually not present in common.dtsi file so did u added it externally
Yes, I added this in the overlay files in the board folder of the example I sent you:
dmic_dev: &pdm0 {
status = "okay";
pinctrl-0 = <&pdm0_default_alt>;
pinctrl-names = "default";
clock-source = "ACLK";
};
Rakshita said:There is also an error in main function
Can u please help me out to solve it
Could you zip your example and attach it to the case? Then I will try to build it and see if I can spot the issue.
Best regards
Torbjørn
Actually I was trying to build the code which u send me, than I added the actual dmic sample code which is available in zephyr it got builded but not able to understand the code at all, I dont know even that pdm clock is working or not
Also I didn't get that why u configured the clk and data pin on 8 and 9 because as per the datasheet the clk is at gpio1, 9th pin and data is at gpio0, 27th pin
Also if I send u the code which was based on nrfx pdm driver can u help me with that as I have been working on that code for a long time and still not able to get that what is the issue
Hi Rakshita
Rakshita said:Also I didn't get that why u configured the clk and data pin on 8 and 9 because as per the datasheet the clk is at gpio1, 9th pin and data is at gpio0, 27th pin
My mistake. I incorrectly assumed you were connecting to an external PDM mic, not the one included in the Thingy53.
I found a project on github where they use the internal mic for a machine learning application, possibly you could get some inspiration there?
https://github.com/metanav/thingy53_snoring_detection/blob/main/src/sensors/ei_microphone.cpp
In the mean time I will try to set up a small example using the internal mic on the Thingy53 and share it with you, but I don't think I will have time to complete this today unfortunately. I will try to get back to you tomorrow.
Best regards
Torbjørn