Posts by relaxibus

Hey,

I need to connect the Iridium modem's I2S to the SAI2 of the PicoCore iMX8MP.

The modems pins are:

I2S_SPKR_WS (output; I2S word select)

I2S_SPKR_SCK (output; I2S primary clock)

I2S_SPKR_SD (output; audio output data)

I2S_MIC_SD (Input; audio input data; 100k pull-down)

Pins are 3.3V TTL

Here the modem dev manual description:

The Iridium Certus 9770 has a digital audio interface that supports up two independent voice

lines.

Digital audio samples for voice calls are transferred over two I2S data lines: I2S_MIC_SD for

digital audio going to the Iridium Gateway and I2S_SPKR_SD for digital audio coming from the

Iridium Gateway. Each data line operates at a serial clock transfer speed of 512 kHz passing

audio samples using a common clock (I2S_SPKR_SCK). Each interface also transfers audio

samples using a common select signal (I2S_SPKR_WS) at a rate of 8000 samples per second

and 16-bit samples.

Within each I2S data line, two ‘audio lines’ are supported using the left and right channels of the

I2S interface. Digital samples for audio line #1 are transferred using the I2S_SPKR_WS low word.

Digital samples for audio line #2 are transferred using the I2S_SPKR_WS high word.

Would this interface be compatible and if yes, what pins should match on the PicoCore side?

Thanks!

I need to run several docker containers on the PC iMX8MP. Ist this supported? Any advice on the best way to achieve this?

I'm working on a drone onboard router project where video output is not required, on some ground based operation a video output option would be desired. I was looking to some ways and came across DisplayLink. There is actually a Ubuntu and other flavors support:

USB 2.0 support:

https://wiki.archlinux.org/title/DisplayLink

https://github.com/torvalds/li…aster/drivers/gpu/drm/udl

https://manpages.ubuntu.com/ma…ic/man4/udl.4freebsd.html

USB3.0 support:

https://support.displaylink.co…-for-ubuntu-now-available

https://www.synaptics.com/prod…graphics/downloads/ubuntu

https://support.displaylink.co…k-software-on-ubuntu-20-0

https://github.com/AdnanHodzic/displaylink-debian

May be there is someone interested to port it for the F&S Linux. I guess it would be a great add-on.

Thanks for the very broad explanation.

As we talk about video output, I'm curios if do you support DisplayLink on USB 2.0 and USB3.0. This could be another good option to get VGA, DVI and HDMI video outputs without using DSI or onboard HDMI. Will open another topic for DisplayLink.

Hi, we are building a wearable router. Now a new customer requests came in asking to connect an external HDMI to AV converter. As the pins for HDMI_CEC, HPD, SDA and SCL are always reserved for both CAN interfaces, I'm wondering if this signals are mandatory to drive a HDMI device.

Alternative would be to use the DSI_A interface, but then a DSI to HDMI bridge IC bus be added.

I'm was checking the Linux GitHub (6.3) and I'm missing a DT entry for PicoCore imx8mp: https://github.com/torvalds/li…/arm64/boot/dts/freescale

Are you planning to add it?

There is a NXP Repo. Could someone take a look? Maybe to create a OpenWRT image?

https://github.com/nxp-imx/imx…1/target/linux/imx/README

is this for the CortexM core?

Anyone installed OpenWRT on a PicoCore MX8MP?

Hi,

I'm developing a router for robotic use and would like to use the vehicle "Ignition Sense" wire, also know as ACC or IGN, to power ON and delayed OFF the PicoCore.

Anyone have done this?

Any schematic example available?

I there some more detailed information about the following PicoCore pins?

J2-44 PMIC_STBY

J2-46 PMIC_ON_REQ

J2-48 On_Off

Thanks!

Thanks, very appreciated!

UART_A is for debug, however I don't need the RTS pin. Can I use both UART_A_TX/RX and the UART_A_RTS pin for CLKREQ concurrently?

Hi, I would like to connect the LAN7430/7431 PCIe to Ethernet bridge on the PicoCore iMX8MP, but I'm missing the "CLKREQ#" pin, mandatory fro the LAN7430/7431.

How to add it?

Thanks!

We decided to go for the Plus model only. So are this GPIOs valid for all Plus variants or at least for variants V3I-LIN and V3XI-LIN?

GPIO

• GPIO_J1_2 = J1-2 (LED_PWR_GRN)
• GPIO_J1_7 = J1-7 (LED_PWR_RED)
• GPIO_J1_9 = J1-9 (LED_PWR_BLUE)
• GPIO_J1_11 = J1-11 (LED_CEL1)
• GPIO_J1_13 = J1-13 (LED_CEL2)
• !GPIO_J1_44 = J1-44 (LED_WIFI)
• !GPIO_J1_46 = J1-46 (CONL_POWER_ON)
• !GPIO_J1_52 = J1-52 (CONR_POWER_ON)
• !GPIO_J1_54 = J1-54 (IGN_SENSE/SOS)
• GPIO_J2_63 = J1-63

Ok, understood and make sense. What about

• GPIO_J1_9 = J1-9 (LED_CEL1)
• GPIO_J1_11 = J1-11 (LED_CEL2)
• GPIO_J1_13 = J1-13 (LED_WIFI)
• GPIO_J2_63 = TBD

Can this be used on both MM and MP?

Many thanks, that helps. A final question. I used the GPIO Reference Card, could you just fly over and say if this GPIOs are ok with the MP and MM?

No LVDS needed, no MPCIe needed:

GPIO

• GPIO_J1_2 = J1-2 (LED_PWR_GRN)
• GPIO_J1_7 = J1-7 (LED_PWR_RED)
• GPIO_J1_9 = J1-9 (LED_CEL1)
• GPIO_J1_11 = J1-11 (LED_CEL2)
• GPIO_J1_13 = J1-13 (LED_WIFI)
• GPIO_J1_44 = J1-44 NOT on MM/MN
• GPIO_J1_46 = J1-46 (LED_PWR_BLUE)
• GPIO_J1_52 = J1-52 (IGN_SENSE)
• GPIO_J1_54 = J1-54 (CEL1_POWER_ON)
• GPIO_J1_63 = J1-63 (CEL2_POWER_ON)
• GPIO_J1_95 = J1-95
• GPIO_J1_97 = J1-97

GPIO

• GPIO_J2_65 = J2-65 (CEL1-2_WAKEUP_HOST)
• GPIO_J2_67 = J2-67 (CEL1_RST)
• GPIO_J2_69 = J2-69 (CEL2_RST)
• GPIO_J2_73 = J2-73 (CEL1_PWR_ENABLE)
• GPIO_J2_75 = J2-75 (CEL2_PWR_ENABLE)
• GPIO_J2_77 = J2-77 (CEL1_DISABLE)
• GPIO_J2_79 = J2-79 (CEL2_DISABLE)

Thanks for explanation! What are the RTC and EEPROM I2C addresses and how can I use it?

Thanks!

can do you advice a supported I2C I/O Expander in order to add more GPIOs?

Ok, but this is not the answer on my question. The module contains an RTC and EEPROM on a I2C bus. On what I2C bus and on what addresses?

We only have two I2C available as I2C_A is used for the second CAN bus and I2C_B is used for the MIPI-CSI.

As I need more GPIOs to control two LTE modules, can I use the following pins:

MPCIE

• !MPCIE_WAKE =J1-97
• MPCIE_CLK_N = J1-91
• !MPCIE_PERST = J1-95
• MPCIE_CRX_N = J1-85
• MPCIE_CRX_P = J1-83
• MPCIE_CTX_N = J1-79
• MPCIE_CTX_P = J1-77

How should I configure it in the device tree to use it as GPIOs?

Are there also ADC's present? E.g. to measure/montor voltage levels. Or do you use a I2C/SPI based ADC?