Activity

From 05/27/2025 to 06/25/2025

TR 06:00 AM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Thank you
Will update if anything else comes up. Thejas Raj

JC 03:07 PM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Thejas Raj wrote in message#6981:
> Hi,
> ...
First please note that the R6/T9 pins will be 1.8V logic level. If your device is 3.3V logic level you will need a voltage translator similar to U5 on the devkit.
> Can you give us the ... Jonathan Cormier
TR 10:04 AM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Hi,
So we were able to interface i2c5 of the evk with our pca 9535 i2c device.
As of now we also require i2c4 of the evk/som whose scl and sda are currently muxed to gpio7_3 (R6) and gpio7_4 (T9) respectively.
Can you give us the... Thejas Raj

JC 01:53 PM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Okay sounds good Jonathan Cormier
TR 08:55 AM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Sorry for the late reply.
We were able to interface the pca9535 after adding the respective nodes for it in the i2c5 bus configuration in the am57xx-mitysom-baseboard.dts file.
Will update if anything else comes up.
Thank you
Thejas Raj

JC 06:43 PM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): > even when data is coming from pca9535. I suppose the 20 1 column should show 21, but it is not coming up.
What does this mean? How is data coming from the pca9535 if you cannot talk to it?
> ...
What are the address A0, A1, A2 pin... Jonathan Cormier
TR 03:48 PM Software Development: RE: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): correction: the extension is J4 Thejas Raj
TR 03:45 PM Software Development: Interfacing pca9535 with arm using i2c expanders (J5)(i2c5): Hello,
We are trying to interface external pca9535 with the evk via the i2c5 bus. We'll be using the J5 extension on the board to do so.
As far as I know, 0x21 is the memory address that is supposed to be used by pca9535 but i2cdet... Thejas Raj

JC 02:57 PM Software Development: RE: Configuring and editing the pinmux settings for AM57(F) dev kit through dts files.: Thejas Raj wrote in message#6973:
> Hi,
> ...
Please clone the u-boot and kernel source separately using git. Jonathan Cormier
TR 05:55 AM Software Development: RE: Configuring and editing the pinmux settings for AM57(F) dev kit through dts files.: Hi,
Thank you for your reply.
And can you give me the path to the u-boot device tree in the yocto environment. The boards/cl directory mentioned in the u-boot wiki that you just provided, especially. Thejas Raj

JC 02:00 PM Software Development: RE: Configuring and editing the pinmux settings for AM57(F) dev kit through dts files.: Note if you are developing a custom board, we'd be happy to do a schematic/layout review as well. Those can be emailed to info@criticallink.com Jonathan Cormier
JC 01:57 PM Software Development: RE: Configuring and editing the pinmux settings for AM57(F) dev kit through dts files.: Unfortunately TI's guidance at least for SDK 6, is that the majority of pinmuxing must be done in u-boot while the IO's are in isolation mode... Setting up the pinmux in u-boot is covered in this following wiki page.
https://support.... Jonathan Cormier
TR 10:30 AM Software Development: Configuring and editing the pinmux settings for AM57(F) dev kit through dts files.: Hi,
We have a yocto source built following the arm development wiki and a working base image.
We are trying to change the pin mux settings some of the peripherals like gpio through the dts files. But cant seem to find anything reg... Thejas Raj

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Mity CPU Platforms » MitySOM-AM57X