[gil_he]

Hi Neeraj, aedancullen,

Good call with the TX.
When we disconnect the TX from the OSD32MP1-RED, the software loads all the way including Linux (the heartbeat is there).
This happens when using both setups, i.e PC/RPi-RED.
It seems something is electrically wrong with the RED evb.
When connecting another RPi to the RED (including the TX) the software load completed fully.

Another issue is with the data received in the terminal from the RED UART.
It is garbage. No matter which UART setup we use (different parity bits setup, speeds, etc.).
Attached a screen shot of that.

Gil

Attachments:

1. 

   uart_tx.png
   

[gil_he]

Hi Neeraj,

Q1:
YES!!!, The output is as follows:

CPU: STM32MP157C?? Rev.?
Model: Octavo OSD32MP1-RED board
Board: stm32mp1 in trusted mode (octavo,osd32mp1-red)
DRAM: 512 MiB
Clocks:
– MPU : 650 MHz
– MCU : 187.500 MHz
– AXI : 266.500 MHz
– PER : 24 MHz
– DDR : 533 MHz
board_check_usb_power: Can’t get adc device(-19)
NAND: 0 MiB
MMC: STM32 SDMMC2: 0, STM32 SDMMC2: 1
Loading Environment from EXT4… OK
In: serial
Out: serial
Err: serial
invalid MAC address in OTP 00:00:00:00:00:00Net:
Error: ethernet@5800a000 address not set.
eth-1: ethernet@5800a000
Hit any key to stop autoboot: 0
STM32MP> ??J%NOTICE: CPU: STM32MP157C?? Rev.?
NOTICE: Model: Octavo OSD32MP1-RED board
INFO: Reset reason (0x15):
INFO: Power-on Reset (rst_por)
INFO: Using SDMMC
INFO: Instance 1
INFO: Boot used partition fsbl1
WARNING: VDD unknownNOTICE: BL2: v2.0-r1.5(debug):v2.0-stm32mp-r1.5
NOTICE: BL2: Built : 03:23:08, Feb 16 2021
INFO: BL2: Doing platform setup
INFO: PMIC version = 0x21
INFO: RAM: DDR3-DDR3L 16bits 533000Khz
INFO: Memory size = 0x20000000 (512 MB)
INFO: BL2 runs SP_MIN setup
INFO: BL2: Loading image id 4
INFO: Loading image id=4 at address 0x2fff0000
INFO: Image id=4 loaded: 0x2fff0000 – 0x30000000
INFO: BL2: Loading image id 5
INFO: Loading image id=5 at address 0xc0100000
INFO: STM32 Image size : 807412
WARNING: Skip signature check (header option)
INFO: Image id=5 loaded: 0xc0100000 – 0xc01c51f4
INFO: read version 0 current version 0
NOTICE: BL2: Booting BL32
INFO: Entry point address = 0x2fff0000
INFO: SPSR = 0x1d3
INFO: PMIC version = 0x21
NOTICE: SP_MIN: v2.0-r1.5(debug):v2.0-stm32mp-r1.5
NOTICE: SP_MIN: Built : 03:23:08, Feb 16 2021
INFO: ARM GICv2 driver initialized
INFO: stm32mp HSI (18): Secure only
INFO: stm32mp HSE (20): Secure only
INFO: stm32mp PLL2 (27): Secure only
INFO: stm32mp PLL2_R (30): Secure only
INFO: SP_MIN: Initializing runtime services
INFO: SP_MIN: Preparing exit to normal world

U-Boot 2018.11-stm32mp-r3-dirty (Feb 16 2021 – 04:28:39 +0000)

CPU: STM32MP157C?? Rev.?
Model: Octavo OSD32MP1-RED board
Board: stm32mp1 in trusted mode (octavo,osd32mp1-red)
DRAM: 512 MiB
Clocks:
– MPU : 650 MHz
– MCU : 187.500 MHz
– AXI : 266.500 MHz
– PER : 24 MHz
– DDR : 533 MHz
board_check_usb_power: Can’t get adc device(-19)
NAND: 0 MiB
MMC: STM32 SDMMC2: 0, STM32 SDMMC2: 1
Loading Environment from EXT4… OK
In: serial
Out: serial
Err: serial
invalid MAC address in OTP 00:00:00:00:00:00Net:
Error: ethernet@5800a000 address not set.
eth-1: ethernet@5800a000
Hit any key to stop autoboot: 0
STM32MP>

Q2:
Yes !!!

Regarding the ‘garbage’ output on UART:
We are unable to reproduce it.
As soon as I have it, I will send you.

thanks
Gil

[gil_he]

Hi Neeraj,

I will look into the constraints when defining the resources for the SPI interfaces.
I chose SPI1 and SPI2 for my design (HW pins wise) and intend to operate them in the maximum BW (100MHz clock).
Any possibility I will not be able to clock them correctly?

thanks
Gil

[gil_he]

Hi Neeraj,

We see output on the RPi; but we only see u-boot prints. There isn’t a single print from the Linux kernel, i.e., the Linux kernel doesn’t load. Also, there is no keyboard input.

We did use two different UART-USB adapters. Both of them work when connecting them from the PC to the RPi’s UART.

We are using a USB-C cable currently and it seems to work fine so far.
But we only get output when the Linux starts loading.
We would like to see u-boot as well. And enter to the u-boot CLI.

thanks
Gil

[gil_he]

Hi Neeraj,

Should that be a consideration when choosing the SPI interface?
Do other SPI interfaces have less or more clock sources than SPI6 has?
Is the flexibility, of choosing a clock source, different between SPI interfaces?

thanks
Gil

[gil_he]

Hi Neeraj,

SPI2/3 are connected to the MPU via AHB-APB1, but the MPU is not planned to be used in our application.
As I wrote, the A7 cores will handle the SPI communication (through the driver that will run under Linux).

so, taking into account that the SPI data should reach the A7 cores and the speeds of the SPI interfaces, which SPI bus should I use?

Also, you wrote “Please make sure you can set the clock speeds you need using CubeMX clock tree utility”.
Any reason why it will not be possible to do that using that utility?

thanks
Gil

[gil_he]

hello Neeraj,

I am sorry, but I do not understand your answer.
What do the numbers represent?
USB2_N has two numbers. USB2_P has one number.

I need the routing length difference, inside the SIP package, between USB_DM2 and USB_DP2.

thank you
Gil

[gil_he]

Hi Neeraj,

We did use this, https://octavosystems.com/app_notes/osd32mp1-red-getting-started/#UART%20Connection, as a guide.
We followed the guidelines regarding HW connections and UART speeds.

We used the two images that were mentioned in the above guide:
Octavo Systems Debian Linux Distribution | Version: 1.2 | February 22, 2021
OpenSTLinux Starter Image Distribution | Version: 1.2 | February 19, 2021

Same results with both.

thanks
Gil

[gil_he]

Got it.
Thank you !

[gil_he]

hello Neeraj,

As far as I can see, a 32KHz LSI is integrated in the STM32MP153C/F.
See stm32mp153c datasheet pages 30,151.

Can’t it be used?
Why do I need an external 32KHz oscillator? (32KHz LSE).

Another question:
The LSE is mainly used for RTC/AWU and .If I don’t require RTC support, is this oscillator required?

thanks,
Gil

• This reply was modified 2 years, 9 months ago by gil_he.
• This reply was modified 2 years, 9 months ago by gil_he.

[gil_he]

ok.
Got it.
thanks.

[gil_he]

hello Neeraj,

I visited the sites you mentioned.
Something is not clear to me:
1. What is the usage of STLINK-V3SET? Can it be used to debug the Linux on A7 core (with GDB) or only the M4 core?
2. Using GDB to debug/trace the Linux system running on the A7 core: how do I connect the PC to the STM32MP15 SoC to allow the debug?

thanks
Gil

[gil_he]

hello Neeraj,

How can we debug the Linux kernel?
Which hw tools can we use?

Can’t JTAG help debug the Linux kernel (running on the dual core A7) using the STLINK-V3SET?

thanks
Gil

[gil_he]

hello Neeraj,

I am combining here also this thread, https://octavosystems.com/forums/topic/changing-default-buck3-voltage/, so we communicate only through here.
The issues are similar.

We decided to use eMMC in DDR52 mode only, so PMIC programming is not required (vdd can remain 3.3V).
However, I want to verify/confirm with you the following:
1. On first power-up, when on-board storage is not programmed, accessing the SiP can ONLY be done from UART or USB.
Boot mode pins should define UART/USB.
2. STM32CubeProgrammer is running on the host pc and has the FSBL and SSBL which are loaded and run.
After they run, we can use the STM32CubeProgrammer to program our image to the eMMC Flash.
3. On first power-up, if we choose NoBoot mode, we can connect JTAG but nothing happens (ROM code goes into infinite loop).
Can JTAG be used, in that mode, to program the eMMC Flash? (with the STM32CubeProgrammer).
4. If we want to debug the platform with JTAG, should we have the NoBoot mode? Or should we normally have eMMC boot mode?

thanks
Gil

[gil_he]

Hello Neeraj,

Part of board bring-up is programing the PMIC NVM.
Please confirm:

Option 1:
Use the M4 core to run baremetal code.
This will be done via JTAG (load/run the code on the M4 core).
STLINK probe will be used.
Boot mode 100.
Will the A7 need to run Linux to support this environment?

Option 2:
Use ST’s Cube Programmer.
This will be done via JTAG (access the STM32MP1 and PMIC).
STLINK probe will be used.
Boot mode 100.
Will the A7 need to run Linux to support this environment?

Are the two options valid to perform PMIC NVM programming?

Are the libraries for the M4 core code provided by the STM32CubeIDE?
Will we use C libraries or assembly code for the baremetal code?

thank you
Gil

• This reply was modified 2 years, 10 months ago by gil_he.
• This reply was modified 2 years, 10 months ago by gil_he.

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