- Forums
- Product Forums
- General Purpose MicrocontrollersGeneral Purpose Microcontrollers
- i.MX Forumsi.MX Forums
- QorIQ Processing PlatformsQorIQ Processing Platforms
- Identification and SecurityIdentification and Security
- Power ManagementPower Management
- MCX Microcontrollers
- S32G
- S32K
- S32V
- MPC5xxx
- Other NXP Products
- Wireless Connectivity
- S12 / MagniV Microcontrollers
- Powertrain and Electrification Analog Drivers
- Sensors
- Vybrid Processors
- Digital Signal Controllers
- 8-bit Microcontrollers
- ColdFire/68K Microcontrollers and Processors
- PowerQUICC Processors
- OSBDM and TBDML
- S32M
-
- Solution Forums
- Software Forums
- MCUXpresso Software and ToolsMCUXpresso Software and Tools
- CodeWarriorCodeWarrior
- MQX Software SolutionsMQX Software Solutions
- Model-Based Design Toolbox (MBDT)Model-Based Design Toolbox (MBDT)
- FreeMASTER
- eIQ Machine Learning Software
- Embedded Software and Tools Clinic
- S32 SDK
- S32 Design Studio
- GUI Guider
- Zephyr Project
- Voice Technology
- Application Software Packs
- Secure Provisioning SDK (SPSDK)
- Processor Expert Software
- MCUXpresso Training Hub
-
- Topics
- Mobile Robotics - Drones and RoversMobile Robotics - Drones and Rovers
- NXP Training ContentNXP Training Content
- University ProgramsUniversity Programs
- Rapid IoT
- NXP Designs
- SafeAssure-Community
- OSS Security & Maintenance
- Using Our Community
-
- Cloud Lab Forums
-
- Knowledge Bases
- ARM Microcontrollers
- i.MX Processors
- Identification and Security
- Model-Based Design Toolbox (MBDT)
- QorIQ Processing Platforms
- S32 Automotive Processing Platform
- Wireless Connectivity
- CodeWarrior
- MCUXpresso Suite of Software and Tools
- MQX Software Solutions
-
- Home
- :
- i.MX Forums
- :
- i.MX Processors
- :
- Re: No audio from i.MX 8MIC-RPI-MX8 mic board on i.MX 8M MINI EVK
No audio from i.MX 8MIC-RPI-MX8 mic board on i.MX 8M MINI EVK
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
No audio from i.MX 8MIC-RPI-MX8 microphone array board on i.MX 8M MINI EVK. I followed the procedure described in a quick start guide here https://www.nxp.com/docs/en/quick-reference-guide/IMX-8MIC-QSG.pdf . Please advise.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
For the time being, the problem was solved after removing the resistor R24 (on Pin 4 of Raspi 40-pin Header connected to MIC_MUTE_INT on U11 of MUTE SWITCH). We found that MIC_MUTE_INT connected to UART3 on i,MX 8M Mini EVK is always high, effectively overriding the MIC MUTE switch state. Proper way to solve this issue may be by pulling down the UART3 pin on EVK. Please post here if you find a better way to solve this problem.
Refer to 8MIC-RPI-MX8 Product Information|NXP 8MIC-Board-Scemetic.pdf for more details.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
You could download design files for 8-MIC-PRI-MX8 here.
https://www.nxp.com/downloads/en/printed-circuit-boards/SCH-45632.zip
I also found an easier way to work around this issue w/o having to remove the register. Simply, remove/bend pin #7 of 40-pin connector.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hello Tom Zheng
the Link you have provided on 2020-03-04 is no longer valid. Could you please fix this?
Also I did not find the 8MIC-Board-Schematic.pdf on the product information page.
Do you know where to find it?
Do you know, which kernel drivers are involved in reading the microphones?
Is there any documentation on this?
Thank you very much.
Nest regards.
Volker Peters.
haidong_zheng
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi a b:
You can find 8mic board schematic in nxp site: https://www.nxp.com/downloads/en/printed-circuit-boards/SCH-45632.zip
I attached patch file in https://community.nxp.com/thread/526150?commentID=1278012#comment-1278012 which you may not access it. This patch is based on 4.14.78 release.
mic driver is in sound/soc/fsl/imx-micfil.c
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
For the time being, the problem was solved after removing the resistor R24 (on Pin 4 of Raspi 40-pin Header connected to MIC_MUTE_INT on U11 of MUTE SWITCH). We found that MIC_MUTE_INT connected to UART3 on i,MX 8M Mini EVK is always high, effectively overriding the MIC MUTE switch state. Proper way to solve this issue may be by pulling down the UART3 pin on EVK. Please post here if you find a better way to solve this problem.
Refer to 8MIC-RPI-MX8 Product Information|NXP 8MIC-Board-Scemetic.pdf for more details.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
This hardware patch worked for me too! Thanks!
haidong_zheng
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi Kyaw:
You can refer to https://community.nxp.com/message/1278012?commentID=1278012#comment-1278012 to get as SW way to solve this.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
hI,
I am looking for SW solution of 8MIC-RPI-MX8. Can you give me a hand?
