Activity
From 02/25/2020 to 03/25/2020
03/25/2020
- JC 01:09 PM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Srinivasa Wunnimani wrote:
> Hi,
> ...
If things are crashing now, then this was probably not the correct change. If you double check the config7 register, did this change set it to the value we expect from v2013.10?
> Sure, we wil... - SW 09:09 AM Software Development: RE: GPIO toggling/chattering while performing NAND read.
- Hi,
I have updated arch/arm/mach-omap2/mem-common.c as below:
132 #if defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
133 case MTD_DEV_TYPE_NAND:
134 gpmc_regs = gpmc_regs_nand;
135 base ...
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...