Activity
From 02/19/2020 to 03/19/2020
03/19/2020
- JC 03:37 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- The config7 register appears to be getting set in arch/arm/mach-omap2/mem-common.c
- SW 06:18 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
Sure, we will print CONTROL_MODULE_REGISTERS and update you on the same.
We want to update the source code and make GPMC registers same as old u-boot.
Towards this can you please let us know:
Where (filename/function/line) do I ch...
03/16/2020
- JC 03:58 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Note the pinmux tables can be read from memory.
See "Table 9-10: CONTROL_MODULE REGISTERS" https://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Software_FAQs#Useful-memory-locations
Pinmux start address: 0x44E1_0800 - SW 03:35 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
Thank you for your input.
Tried with below command, still same problem.
mw.w 0x50000078 48
As mentioned earlier, we have u-boot 2013.10 with less amplitude.
To make sure pinmux is okay, copied mux.c from board/cl/mityar... - JC 02:09 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- > md.b 0x50000070 10
> ...
I would stick with using md.w and mw.w since all the registers are 32bit. It may or may not be okay to write the registers one byte at a time but I wouldn't trust it.
Try running @mw.w 0x50000078 48@ and s...
03/14/2020
- SW 11:52 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Sorry for typo error:
I was able to manual write it to GPMC *without* any error.
Regards
Srinivasa - SW 08:47 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
I tried to change GPMC_CONFIG7_0 to 0x48 from 0xf48 as below. I was able to manual write it to GPMC with any error.
md.b 0x50000070 10
mw.b 0x50000078 48
mw.b 0x50000079 00
But after executing below read command, boar...
03/11/2020
- JC 01:41 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- You can use md to read memory locations and mw to write them. https://www.denx.de/wiki/publish/DULG/to-delete/UBootCmdGroupMemory.html
- SW 11:13 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
Manually means, do you want me to change GPMC_CONFIG7_0 at u-boot prompt?
Regards
Srinivasa - SW 10:45 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
With u-boot V2013 frequency of pulses @ ~3.571 MHz and amplitude ~150 mV.
With u-boot V2018 frequency of pulses @ ~3.571 KHz and amplitude ~ 3.2 V.
Please find images attached.
Regards
Srinivasa
03/09/2020
- JC 03:02 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- If you manually set GPMC_CONFIG7_0 back to 48, does the activity on GPIO 0_27 stop?
- BD 02:27 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Srinivasa,
We have not seen this before and I am reviewing your comments and logs.
Diff of GPMC registers - SW 01:23 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
I have dumped the values of GPMC registers for u-boot V2013.10 and V2018 at u-boot prompt. Please find the files attached.
I am little confused with V2018:
GPMC_CONFIG7_0 = f48, which indicates it’s 16 MB flash but N...
03/06/2020
- SW 12:08 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
Test case 1:
Tested on u-boot Version 2013.10 from mitysom (u-boot-mityarm-335x-6c6a700.tar.gz).
Probed GPIO 0_27 while running below command:
nand read.i 0x83000000 0x280000 0x500000
There is some activity on GPIO 0_27 as... - Hi,
We have mitySOM board in our product and we are using u-boot-mityarm-335x.tar.gz and building u-boot as below:
/* Export path */
source /opt/criticallink/mitysom-335x_2018-04-16/environment-setup-cortexa8hf-neon-criticallink-l...