Activity
From 04/09/2012 to 05/08/2012
05/07/2012
- AS 12:01 PM PCB Development: RE: Power Management w/ MityARM
- Mike,
Thanks for your response, it is really helpful to know how the PMIC is connected. I posted a question about how the tsp65910 Linux driver handles interrupts on the TI E2E forums and got a response from TI:
http://e2e.ti.com/su... - MW 11:06 AM PCB Development: RE: Reg. JTAG Reset and SD Card connection
- Hi Salam,
Thanks for the comments.
1. There is a 10K pull down on the JTAG Reset line so that the JTAG interface is held in reset in the absence of a JTAG emulator connection. The emulator should pull the signal high when it is co...
Hi,
As per the Mity carrier board design
1, the NRST of JTAG connector is permanently low,that means it is always in reset mode
Pls confirm.
2.No Pull-up resistor in SD Data lines and CMD line, Please confirm this also....
05/04/2012
- RV 03:50 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Mike,
Thanks for the information.
I will check on the details provided by you.
Regards,
Raja. - MW 03:37 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Can you post your source code for the I2CTest (including the value of addr) and provide a specification to the device you are communicating with (part number, etc)? You are sending a buffer size of 5 down, are the remaining 3 bytes supp...
- RV 03:18 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Mike,
Thanks for your response.
I am using I2C1 and using from application as /dev/i2C-2. This change of pin mux is only for my testing. In the final board we will be using the same pin mux used in the evaluation board. We are n...
05/03/2012
- MW 04:22 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Raja,
Can you please post the full command lines for your output?
There are actually 3 I2C buses in play.
I2C0 is connected to ADS1000 (address 0x48) and port J700 on the DevKit Host board. It shows up as /dev/i2c-1 and is a... - RV 03:55 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Tim,
Thanks for the reply.
Even my understanding is almost similar. But earlier I have tried with out connecting slave. Now I have connected the slave and still the error number is same and not able to write data to I2C. But ope... - TI 01:34 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Raja
You can use the i2c utilties to test the bus. The output below is from scanning both I2C buses.
@root@mityarm-335x:~# i2cdetect -y -a -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- --... - RV 12:00 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Tim,
Gentle reminder about the above response.
Could you please let me know how to go ahead.
Regards,
Raja.
05/02/2012
- RV 02:52 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi Tim,
In Mity arm board I2C1 is configured on mii1_crs. pin and in Am335x based board same I2c1 is on spi0_d1 pin. I just want to know whether i can change to uart pin mux and probe on expansion connector.
this is to make sure tha... - TI 02:37 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Raja
The EREMOTEIO error comes from drivers/i2c/busses/i2c-omap.c and is because there is no Ack from
bus request.
Unless I misunderstand what you are doing, I don't think you can just change the pin muxing around.
The pin muxing is ... - RV 02:35 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Sorry i missed to mention file name details.
filename = /dev/i2c-2. - RV 02:27 PM Software Development: RE: Usage of I2C1 to connect external peripheral
- Hi,
Code i have used to access is mentioned below:
fd = open(filename, O_RDWR);
ioctl(fd, I2C_SLAVE, addr);
err = write(fd, buf, 5);
Open and ioctl with I2C slave are success. But write gives an error and the error number is:... - Hi,
I am trying to use the I2C1 to communicate to the slave.
To probe the signals on Mity board, i am planning to change the pin mux for I2C1 from
mii1_crs.i2c1_sda to uart0_ctsn.i2c1_sda, similarly for scl in file board-mityarm3...
04/30/2012
- MW 07:48 AM PCB Development: RE: Power Management w/ MityARM
- Hi Ali,
Sorry for the delay in response, you have a lot of questions wrapped up in these two posts, and we haven't gone through all the power management states here (we've been focused on basic interface functionality up until now, th...
04/27/2012
- AS 11:57 AM PCB Development: RE: Power Management w/ MityARM
- Sure enough after posting this I found the User's Guide for using TPS65910 with AM335x:
http://www.ti.com/lit/pdf/swcu093
Can I assume that this is how the PMIC is hooked up on the MityARM?
If so this is how I understand the PM sy...
04/26/2012
- RV 06:08 PM Software Development: RE: PIN mux details and modifications
- I have tested these pins too
can_pin_mux[] = {
{"uart1_rxd.gpio0_14", AM33XX_PIN_OUTPUT},
{"uart1_txd.gpio0_15", AM33XX_PIN_OUTPUT},
{"mii1_txd3.gpio0_16", AM33XX_PIN_OUTPUT},
{"mii1_txd2.gpio0_17", AM33XX_PIN_OUTPUT},
same... - MW 05:46 PM Software Development: RE: PIN mux details and modifications
- Hi.
In your log file, you show modification of gpio 100.
The gpio offset on the linux command line needs to be
GPIO = bank*32+offset
that corresponds to gpio3_4. I don't see that anywhere in your mux files.
Also, you nee... - RV 05:29 PM Software Development: RE: PIN mux details and modifications
- Hi,
But i have changed the can_pin_mux and LCD_Data0 pins aswell. but even those are also not working. I have attached the mux335x file for your reference.
Please let me know anything can be done. I will post to TI based on your in... - MW 05:21 PM Software Development: RE: PIN mux details and modifications
- Hi. OK.
From your log file, there is an error:
[ 0.079700] _omap_mux_get_by_name: Could not find signal lcd_data11.gpio0_8
This means that the pinmux setting for this pin you are trying to use as a GPIO is not properly defin... - RV 04:36 PM Software Development: RE: PIN mux details and modifications
- Log file.
- MW 04:25 PM Software Development: RE: PIN mux details and modifications
- Hi Raja,
Can you also post your boot up text (dmesg)? I just want to check for any boot / pinmux error messages if you haven't already done so.
-Mike
- RV 04:08 PM Software Development: RE: PIN mux details and modifications
- Attached the baseboard file for your refence.
Wanted to configure LCD_DATA pin to be configured as GPIO.
Thanks. - MW 03:49 PM Software Development: RE: PIN mux details and modifications
- Not yet (kind of bandwidth constrained, sorry).
You might try posting to the E2E site on TI's support site:
http://e2e.ti.com
This shouldn't be specific to the CL SOM, this is more of a basic AM335x question.
I will try to... - RV 03:44 PM Software Development: RE: PIN mux details and modifications
- Hi,
Do you have any updates for me regarding my approach on pinmux?
Thanks. - Hey,
We're trying to figure out how to utilized MityARM's power management capabilities in our design and this is hard to do without knowing how the AM3359<->PMIC connections operate. I've scoured the datasheets/design guides for TPS...
04/25/2012
- RV 01:27 PM Software Development: RE: PIN mux details and modifications
- Hi,
Thanks for your quick response.
I have tried the same by configuring LCD_data0 pin to GPIO. as lcd_data11.gpio0_8 as AM33xx_PIN_OUTPUT and added to MUXENTRY of the same pin in mux33xx.c file. Not able to find the file mux335x.c... - MW 01:08 PM Software Development: RE: PIN mux details and modifications
- Hi,
So there are 3 steps to configuring a GPIO.
1) modify the baseboard file and ensure your issuing a pin mux configuration.
2) make sure the pin mux option is defined int he mux335x file (TI didn't complete the definitions, so m... - RV 12:57 PM Software Development: RE: PIN mux details and modifications
- Hi Mike,
To change the mux details i have defined the basic pin details to GPIO and added GPIO pin details to mux335x.c file.
I tried pins of CAN1, LCD_DATA and tried to probe on connector J401 for LCD but could not get the value w...
04/23/2012
- RV 04:40 PM Software Development: RE: PIN mux details and modifications
- Hi Mike,
Thanks for the information.
what are all the modifications we have to do if our board doesnot have any external pull up/down resisters?
Changing Mux details in baseboard_XX.c file seems not working for LCD_data pin to G...
04/20/2012
- MW 10:44 AM Software Development: RE: Test application for drivers
- For a linux system, GPIOs can be driven using sysfs via command line to modify the pins via the "gpiolib":http://www.mjmwired.net/kernel/Documentation/gpio.txt if the kernel has configured the pinmux settings for them to be associated to...
- Hi,
Do you have any test application to test the drivers such as GPIO and UART? Could you please share them?
Regards,
Raja. - MW 10:38 AM Software Development: RE: PIN mux details and modifications
- Are you using linux as your target OS? If you, you will need to update the pinmux settings in your baseboard-XXXX.c file in the kernel for the pins in question. You probably don't need to change u-Boot for these pins if you use externa...
- Hi,
I have to use more GPIOs in our design. I am thinking of using the pins assigned for CAN0 and CAN1 in Mityarm as GPIO.
Do i have to change the pin mux configuration if so do i have to use any utility for that?
u-boot needs t...
04/19/2012
- MW 03:50 PM Software Development: RE: Is RMII possible with the MityARM-3359?
- Yes,
It should be supported if you configure the pinmux accordingly. You will need to modify u-Boot in order to use the network in this configuration, as well as the kernel.
-Mike
- (posted on behalf of a customer)
Is RMII possible with the MityARM-3359? I didn’t see some on the alternate functions listed in Critical Links documentation but it exist in TI’s.
(whoops, posted to the wrong forum, can't seem to m... - MW 03:31 PM Software Development: RE: Is there a linux driver for RMII or just RGMII for the MityARM-3359
- We've only tried to use the RGMII port here. I'm fairly certain that RMII is supported, but you should contact TI on the "TI E2E site":http://e2e.ti.com to learn the details as to how to use the EMAC in this mode and configure it up.
... - Is there a linux driver for RMII or just RGMII?
- TI 02:54 PM PCB Development: RE: ADC reference voltage data required
- salam
The TI datasheet for the AM3359 [ http://www.ti.com/lit/ds/symlink/am3359.pdf ] recommends 1.8V for the ADC circuit. The max is 2.1.
I don't think I'd recommend using 3.3 for VREFP.
cheers
/Tim - Hi,
`A 3.3 V and 1.8 V are connected to the ADC reference voltage in your carrier board reference design, Can i connect 3.3 V to the ADC Ref.
Plz confirm?
regards
salam
04/18/2012
- MW 02:37 PM PCB Development: RE: Is a separate I2C EEPROM needed to ID our Carrier board?
- Yes,
You should be defining your own baseboard-***.c file if you are making a custom board using the baseboard-mityarm335x-devkit.c as a reference.
-Mike
- AS 11:46 AM PCB Development: RE: Is a separate I2C EEPROM needed to ID our Carrier board?
- Hey Mike, that helps a lot. One reason I was asking about the EEPROM because we plan to cable a 24-bit LCD/touchscreen into our carrier board and based on the ULCD7 code it seemed like they were relying on the EEPROM to detect the LCD/t...
- MW 08:06 AM PCB Development: RE: Is a separate I2C EEPROM needed to ID our Carrier board?
- Hi.
The TI SDK works with the MityARM-3359, but you need to replace "u-Boot":http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Das_U-Boot_Port and the "Kernel":http://support.criticallink.com/redmine/projects/armc8... - AS 12:00 PM PCB Development: RE: SPI1 pin conflict:
- Michael Williamson wrote:
> The MityARM-335x module provides SPI1 SCLK, D0 and D1 on pins 193, 195, and 197 of the edge connector.
> ...
No problem, we will most likely boot off MMC. The PinMux utility associates Pin 193 with SPI1_SCL... - MW 08:19 AM PCB Development: RE: SPI1 pin conflict:
- The MityARM-335x module provides SPI1 SCLK, D0 and D1 on pins 193, 195, and 197 of the edge connector.
On the module, these lines are connected to an on-board SPI NOR FLASH via SPI1_CS0 (Ball C12 on the 3359 package, not available on ...
04/17/2012
- (posted on behalf of a customer)
All the other AM3359 boards have this (ULCD, TI EVM, BeagleBone, etc.) and it looks like the EEPROM ID triggers companion code in the kernel. The EEPROM basically tells the kernel what hardware is con... - (posted on behalf of a customer)
MityDSP has dedicated pins 193, 195 and 197 to SPI1 because they connected it to an SPI NOR flash, however using either pins 195 or 197 Data with the 193 clock for SPI1 results in “IO Set violation” wa...
04/16/2012
- AS 02:42 PM PCB Development: RE: Reg. ADC reference voltage
- a gentle reminder for the below question
regards
salam
04/15/2012
- MW 12:47 PM PCB Development: RE: Specification TPS power sully design inthe AM3359 carrier board
- Hi Salam,
If you are asking if you can use our reference DevKit 3.3V supply design to power other 3.3V devices, then answer is likely "yes" assuming you are providing the same input voltage capabilities to the supply as are supplied o...
04/13/2012
- RV 03:23 PM Software Development: RE: Problem in building of kernel and booting
- Hi Mike,
Thankyou very much. That worked...
But the only difference is the kernal iamge name provided default in the SD Card has version 3.1.0+ and mine 3.1.0-g0e9e502. Does it mean anything?
And also I request your support in i... - AS 02:48 PM PCB Development: RE: Specification TPS power sully design inthe AM3359 carrier board
- gentile reminder for the above question
- AS 02:48 PM PCB Development: RE: Specification TPS power sully design inthe AM3359 carrier board
- gentile reminder for the above question
04/12/2012
- MW 05:54 PM Software Development: RE: Problem in building of kernel and booting
- Hi,
In order to build the kernel image, you need to checkout the "mityarm335x_wip" branch. It is not the default master branch. You may also need to do a "git pull" on your VM in order to make sure you get the latest kernel patches....
Hi,
I tried to recompile the kernel provided and booting the same on MityARM 335x development board.
I have followed the procedure as mentioned in lilnk http://support.criticallink.com/redmine/projects/armc8-platforms/wiki/Linux_...
04/11/2012
- AS 12:16 PM PCB Development: RE: Regarding I2C interface
- Hi Raja,
I've used 2 Mosfet's for level translation in the past. cheaper and works well, plus no obsolescence issues.
Regards,
Alexei
- RV 10:21 AM PCB Development: RE: Regarding I2C interface
- Hi Alexei,
Could you please suggest an IC for this application.
Regards,
Raja. - AS 10:04 AM PCB Development: RE: Regarding I2C interface
- Hi Raja,
you have to use 5V to 3.3V I2C level shifter to interface with AM3359, it is not 5V tolerant part
this article may be helpful http://ics.nxp.com/support/documents/interface/pdf/an97055.pdf
Regards,
Alexei - Hi,
`A 3.3 V and 1.8 V are connected to the ADC reference voltage in your carrier board reference design, Can i connect 3.3 V to the ADC Ref.
Plz confirm?
04/10/2012
- AS 05:23 PM PCB Development: RE: Specification TPS power sully design inthe AM3359 carrier board
- Hi alexi,
as per your Carrier board design guidline,the Typical input voltage of the SOM module is 5v, so we are planning to give 5v ,0.7A supply to SOM module( coz we are usuing 5V for some other section also)
And for all peripharals... - AS 11:32 AM PCB Development: RE: Specification TPS power sully design inthe AM3359 carrier board
- Hi Salam,
the SOM module requires 3.3V input voltage with up to 1Amp input current, our Dev Kit board based on TPS5430 IC to generate 3.3V supply, the input cicrcuit can handle up to 20V as we are using MOSFET for reverse polarity pro... - We need to interface Power line Communication through I2C to AM3359.
Device communication output voltage specifications are as follows:
VOH = 4V (min)
VOL = 0.75 (max)
VIL = 0.8 (max)
VIH = 2.1 (min)
please let us know the ...
04/09/2012
- MW 04:07 PM PCB Development: RE: Reg. Vin-input power supply to the Microcontroller connector.
- That circuit is not required for your design. It is a current measuring circuit in order to allow someone to measure the power consumed by the MityARM-335x module via I2C interface. You don't need it.
-Mike
- Hi,
we are plnning to generate a 5v input supply (5v,0.75 A) , that will be connected to the to the microcontroller, As per the reference carrier baord schematic provided by the carrier link,, iam sseing some other circuit (attached w... - HI,
Could you please send me the Specification TPS power sully design inthe "AM3359":http://www.mitydsp.com/mityarm-3359 carrier board.
Regrds
salam