Technical Discussion Group Forum

This forum is provided for user discussion. While Logic PD support staff and engineers participate, Logic PD does not guarantee the accuracy of all information within in the Technical Discussion Group (TDG).

The "Articles" forums provide brief Articles written by Logic PD engineers that address the most frequently asked technical questions.

To receive email notifications when updates are posted for a Logic PD product download, please subscribe to the TDG Forum of interest.

Search this forum:
You are not authorized to create a new topic
Page 1 of 212 > >>
 Last Post
0 Replies and 2304 Views Article: How to access the UARTs in Linux  2304  0 Started by  bradb Q: How are how UARTA, UARTB and UARTC on the DM37x SOMs assigned in Linux A: Here are the assignments as seen in the Linux BSP. UARTA (on SOM) -> UART1 (on the processor) -> /dev/ttyO0 (in Linux) UARTB (on SOM) -> UART3 (on the processor) -> /dev/ttyO2 (in Linux) UARTC (on SOM) -> UART2 (on the processor) -> /dev/ttyO1 (in Linux) The Logic PD Linux Software Test Plan (STP) provides additional information on how to test the UARTs.    The STP is available on the support ...
0 2304
10 Mar 2015 08:51 AM
0 Replies and 3289 Views Rebuilding custom SFH_OMAP-L138 tools  3289  0 Started by  Adam Ford TI Provides instructions to build the TI Flash and Boot utilities:   The L138 Virtual machine provided by LogicPD has all the necessary tools and libraries installed, but the trick is pointing 'make' to the right tools and libraries. Download the source from SourceForge: tar xvf OMAP-L13...
0 3289
03 Dec 2014 01:47 PM
2 Replies and 2958 Views L138/AM1808 Processor Speeds  2958  2 Started by  Adam Ford  Summary: To run at faster speeds, RVDD and CVDD need to be higher than 1.2V.  Since these are not sharing the same supply voltage, we need to patch da850.c to adjust both DCDC3 and LDO2 properly.  The instructions below detail how to apply the patch, set the u-boot parameters and confirm the new speeds are available.  To Apply Patch: 1.  Builid Kernel and confirm it works without errors. 2.  Download da850-speed.patch 3.  cd AM1808_OMAP-L138 4.  pa...
2 2958
by  Adam FordJump to last post
30 Jul 2014 08:39 AM
0 Replies and 3234 Views Article: Using the BQ27000 on DM3730 Torpedo SOMs Running Linux  3234  0 Started by  Deleted User This note will give you insight on how to use the BQ27000 on the DM3730 Torpedo SOM running Linux. BQ27000 Hardware: The battery fuel gauge a Texas Instruments (TI) BQ27000, requires 21V to program some of the registers for the best performance. If the gas gauge will not be pre-programmed during manufacturing: a. Ensure that the charger circuit will allow the BQ27000 to detect battery full. The default taper current for battery full is ~100 mA. The charger circuit must allow the chargin...
0 3234
11 Oct 2013 10:50 AM
0 Replies and 2470 Views Article: CPU Clocks and Power on Hours  2470  0 Started by  Deleted User This article will discuss the different tradeoffs of running the processor at different frequencies. Acronyms: 1. POH - Power on Hours 2. OPP - Operating Performance Point 3. TRM - Technical Reference Manual Considerations: When considering the OPP at which you will run the SOM processor, first consult the Technical Reference Manual and data sheet for the processor; this note will only briefly cover the topic. For a given CPU junction temperature a processor's POH will be inv...
0 2470
07 Oct 2013 12:24 PM
0 Replies and 2565 Views Article: Hardware .MAX and .DSN Files  2565  0 Started by  Deleted User This article will contain information on the .max and .dsn files supplied on the downloads page of the respective TI products that we offer. Note: .max and .dsn files are only available for the SOM baseboard. The .max and .dsn files can be opened in OrCAD 16.2 and 16.3. Later versions of OrCAD may be used, but have not been verified yet. Location of baseboard .dsn and .max files: Torpedo Kit:
0 2565
30 Sep 2013 09:20 AM
0 Replies and 3538 Views Article: LTIB Target Image Generation  3538  0 Started by  Deleted User LTIB allows its users to create various images to support file systems like yaffs2 operating in NAND and ext2 operating in RAM (i.e. ramdisk). This short note will detail how switch between these two types of images. Ramdisk: A ramdisk image can be stored on an SD card or a NAND chip. When the system boots, the ramdisk will be pulled from persistent storage and placed in ram, from which it operates. To create a ramdisk image complete the following steps: 1. From the LTIB directory on the host...
0 3538
17 Jul 2013 03:20 PM
0 Replies and 2589 Views Article: DM3730 TW Bluetooth Baud Rate Modification  2589  0 Started by  Deleted User This article will discuss how to modify the baud rate for the Bluetooth serial interface. To do this open the following file: rpm/BUILD/linux-3.0/arch/arm/mach-omap2/board-omap3logic.c Once this file is open for editing, search for the string "baud" You should see something like the following: static struct ti_st_plat_data omap3logic_wilink_pdata = { &46;nshutdown_gpio = 162, &46;dev_name = "/dev/ttyO1", &46;flow_cntrl = 1, &46;baud_rate...
0 2589
16 Apr 2013 08:48 AM
0 Replies and 3338 Views Article: DM3730 TW Measuring Bluetooth Performance  3338  0 Started by  Deleted User NOTE: If you would like to increase the baud rate to the Bluetooth interface see this article viewtopic.phpf=52&t=16555 The DM3730 Linux BSP comes with the Bluez utilities. These utilities can be used for testing Bluetooth connections and throughput performance. In this article we will use the l2ping command to test a Bluetooth connection and its performance. Before being able to detect nearby Bluetooth devices, you will need to bring up the st and btwilink drivers and start the uim daem...
0 3338
15 Apr 2013 02:11 PM
0 Replies and 2754 Views Article: DM37 Linux - Newer I2Ctools  2754  0 Started by  Deleted User The version of I2CTools included with the current DM37 Linux BSP is old and doesn't support block transfers which could be a problem for I2C devices needing multi-byte reads/writes. The procedure for getting a newer version of the tools is pretty simple. You can down load the source here: http&58;//www&46;lm-sensors&46;org/wiki/I2CTools To ensure the correct build environment use the ltib shell: logiclogic-desktop&58;~/logic/Logic_BSPs/Linux_3&46;0/REL-ltib-DM3730-2&46;3-2$ &46;/ltib ...
0 2754
15 Apr 2013 11:11 AM
0 Replies and 2758 Views Article: OMAP-L138 / AM1808 Reprogramming the MAC Address  2758  0 Started by  Deleted User The following guide comes from AM1808/OMAP-L138 SOM-M1 SPI Flash Recovery Application Note 556 &911&93 &911&93 ... NOTE: Some of our guides instruct you to erase and reprogram the SPI flash without reprogramming the MAC address. We are updating these documents with the appropriate instructions. In the meantime use the instructions in this guide. The Ethernet MAC address of your SOM-M1 can be found on the white sticker attached to the mod...
0 2758
09 Apr 2013 09:29 AM
0 Replies and 6445 Views Article: L138 / AM3517 WinCE and WEC 7 Software  6445  0 Started by  Deleted User Q: Where can I download WinCE 6.0 or WEC 7 for the OMAP-L138 or the AM3517 A: For the OMAP-L138 or AM3517, the WinCE 6.0 and WEC 7 code was developed by an independent third party, Adeneo. WinCE code examples and tutorials, can be found either on the TI website or the Adeneo website. The TI AM3517, AM1x, OMAP-L1x WinCE SDK can be accessed at: ... apl1x.html This is supplied by MPC Data and Adeneo Embedded. There are links to these sites from the T...
0 6445
03 Jul 2012 10:02 AM
0 Replies and 1860 Views Article: L138 -- Restoring MAC Address on SPI Flash  1860  0 Started by  Deleted User Q: How is the MAC restored to the SPI Flash at address 0x7F0000 A: Modify the DDR content at address 0xC0000000. The MAC address is printed on a sticker pasted on the SOM Module. The MAC format is: 00:08:EE:xx:yy:zz where the last three “xx” pairs will be replaced by the final numbers on the sticker. ************* 1) Boot the OMAP-L138 kit to the U-Boot prompt. Enter the following commands. Enter the numbers that follow the “”. U-Boot> mm.b c0000000 c0000000: fb 00 c0000001: ef 08 ...
0 1860
26 Jun 2012 01:28 PM
0 Replies and 1595 Views Article: L138 -- SOM-M1 Kit SOM Differences  1595  0 Started by  Deleted User Q: What is the difference between the OMAP-L138 SOM-M1 included in the kits and a standard OMAP-L138 SOM-M1 A: The OMAP-L138 SOM-M1 included in the EVM Kit has additional power measurement circuitry added to the PCB to assist in development efforts; this SOM is identified as model number SOMOMAPL138-11-1602AHCR and is only available as part of the EVM Kit. The OMAP-L138 SOM-M1 with the same memory configuration that is available in production quantities from Logic PD Distributors does not co...
0 1595
25 Jun 2012 04:55 PM
0 Replies and 1866 Views Article: L138 -- UART0 muxed with Ethernet PHY on MII Bus  1866  0 Started by  Deleted User Q: How is the OMAP-L138 SOM-M1 UART0 used, since the signal lines are muxed with the Ethernet PHY on the MII bus A: UART0 is muxed as the MII bus for the Ethernet PHY on the module. You may be able to get access to the UART0 interface by putting the ethernet into isolate mode, and then changing the pinmux of the MII bus (assuming you do not need access to the ethernet at the same time). The data sheet for the LAN8710 chip is located here: ... AN8710.p...
0 1866
01 Jun 2012 08:36 AM
0 Replies and 1573 Views Article: TI-All --Do All Processor Signals Come Off The SOM?  1573  0 Started by  Deleted User Q: Do all of the processor signals come off of the SOM A: Most of the processor signals are available on the SOM's expansion connector(s). Please refer to the specific SOM Hardware Specification manual for a complete reference. PRODUCTS Included: iMX31, AM1808, AM3517, DM3730, AM3703, DM3730 Torpedo, DM3730 Torpedo Wireless, L138, OMAP35x, OMAP35x Torpedo, PXA270
0 1573
17 May 2012 09:07 AM
0 Replies and 1403 Views Article: AM3517 SOM-M2 Kit SOM Difference  1403  0 Started by  Deleted User Q: What is the difference between the AM3517 SOM-M2 included in the kits and a standard AM3517 SOM-M2 A: The AM3517 SOM-M2 included in the EVM has additional power measurement circuitry added to the PCB to assist in development efforts; this SOM is identified as model number SOMAM3517-11-1780RJCR and is only available as part of the EVM. The AM3517 SOM-M2 with the same peripheral and memory configuration that is available in production quantities from Logic PD Distributors does not contain ...
0 1403
17 May 2012 08:44 AM
0 Replies and 1717 Views Article: AM3517 Setting the MAC Address  1717  0 Started by  Deleted User Q: How is the Ethernet MAC address set on the AM3517 A: The Ethernet MAC address must be manually set if you do not want Linux to assign a random one. A couple different unique addresses can be assigned, depending on your situation. If you're using the EVM from LogicPD, The simplest way to do this is to use the MAC address printed on the sticker located on the top side of the SOM. Note that this MAC address actually corresponds to the wireless 802.11b/g. If you cannot use the wireless...
0 1717
09 May 2012 12:31 PM
0 Replies and 1426 Views Article: L138 -- How to Create SD Card as Removable Media  1426  0 Started by  Deleted User Q: Can the SD Card be used as removable media A: Creating the removable media The examples below assume a 2GB media mapped in Linux as /dev/sda Make sure the media being modified is the correct one! If used without care, Parted can inadvertedly erase the contents of your Hard Disk! To be sure the correct disk will be modified, use the option print of parted to show the device information: sudo /sbin/parted /dev/sda print Take note of the number of partitions in the column Number and ...
0 1426
04 May 2012 03:36 PM
0 Replies and 1442 Views Article: TI-All --Finding the Part, Serial, and Model Number  1442  0 Started by  Deleted User Q: How do I find the part number, serial number, and model number on my SOM or Development kit A: White Paper 293: Model Number Explanation & Decode explains how to identify your product by part number, serial number, and model number. PRODUCTS Included: iMX31, PXA270, DM3730, AM3703, DM3730 Torpedo, DM3730 Torpedo Wireless, OMAP-L138, AM1808, AM3517
0 1442
02 May 2012 10:41 AM
You are not authorized to create a new topic
Page 1 of 212 > >>

RSS Feed Available