[beagleboard] Re: BBB: bare metal programming in C - what is need on the SD card?
Hi Reinhard, regarding pin toggling this link might be useful: http://e2e.ti.com/support/embedded/starterware/f/790/t/366081.aspx Regards, Martin H. Am Montag, 20. Oktober 2014 15:23:46 UTC+2 schrieb reinhar...@gmail.com: Hello, after nearly 2 weeks of struggling my first LED blinking works under the following constitution: -) Beaglebone black, Element14, rev.C -) no OS -- holding boot button, when powering -) Code Composure Studio v6 -) Starterware (without BBB patch: http://software-dl.ti.com/dsps/dsps_public_sw/am_bu/starterware/latest/index_FDS.html (DOES NOT WORK AT THE MOMENT) -) XDS100v2 emulator 1.) The maximum frequency for toggling the pin is 1.6 MHz, but I need maximum speed. In my understanding there is still a speed decrease as the system is running in *emulation *mode. Correct? 2.) From the build process of CCS I have got a .out file. *What are the next steps to get the program running from the SD card?* Please be very precise - I have already heard of MOL, u-boot, GEL file,, but there does not seem to be a step-by-step tutorial. 3.) *What are the next steps to get the program running from the eMMC?* You see, I want to do bare-metal C programming, without linux or any other OS, as I must operate (pin toggling, computations,...) as fast as possible. Your help is very appreciated! Reinhard -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Is it easy to reduce the clock frequency on Beaglebone I2C?
Hi Chris, I did not mean to say that LINUX is not useful. But yes, I can see your point: if you have to change the I2C clock that is something different. Martin H. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Is it easy to reduce the clock frequency on Beaglebone I2C?
I freely admit that I don't know anything about LINUX. We don't use it. But why would you want to modify the device tree if I2C is running? We have I2C running with an LPC2468. All we did is putting a P8287 at each end of the line. And it works. No code modification was required. Martin H. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[beagleboard] Re: Is it easy to reduce the clock frequency on Beaglebone I2C?
You might like to have a look at the P82B96 data sheet. Feature: 400kHz operation over at least 20 meters of wire And you don't have to modifiy your I2C code! Martin H. Am Freitag, 29. August 2014 19:18:46 UTC+2 schrieb c...@isbd.net: I want to stretch the I2C bus to a few metres, I will use screened cable to minimise noise pick-up but this will increase the capacitive load on the bus. So, I probably need to reduce the I2C clock frequency, how easy is it to do this? I will probably use the Adafruit libraries but don't have to. -- Chris Green ยท -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [beagleboard] GPIO not working with example code
Hello Pablo, you might like to have a look at http://e2e.ti.com/support/embedded/starterware/f/790/t/308692.aspx. It is about write protection when being in user mode. Regards, Martin Am Mittwoch, 11. Dezember 2013 15:36:57 UTC+1 schrieb Pablo Oyarzo: Thank you! -Pablo Oyarzo -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [beagleboard] BBB: Where is pin1 of JTAG connector?
Exactly. Close to pin12 of header P9. It's working. Thank you! Martin -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[beagleboard] Re: Programming BBB A5C using TI CCS 5.5.0
Look at http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/t/305959.aspx ... and keep in mind that other emulators require a licensing fee. Martin Am Montag, 25. November 2013 19:50:58 UTC+1 schrieb gled...@lexmark.com: Hi, I have a beginners question related to the Beaglebone Black and programming using TI's Code Composer Studio v5.5.0. In the past I have programmed MicroChip PIC controllers which require a JTAG connection to the chip. I have also used MicroChip development boards which allow for JTAG emulation over a USB connection. My assumption for the BBB was that it would work the same way and not require an external JTAG interface product. If this correct or not? Thanks -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [beagleboard] BBB: Where is pin1 of JTAG connector?
Sure? I can see something that looks like a 1. But if that is pin1, then I would expect the 3rd pin in the row to be pin5 (TVDD). According to the schedule that pin should have a voltage of 3.3V, but what I measured is 0V. Is that voltage expected to come in from the JTAG emulator? Thank you! Martin -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[beagleboard] BBB: Where is pin1 of JTAG connector?
Hi, I have got a BeagleBoard_Black Rev 6. To solder that JTAG socket I am looking for an information where pin1 is located on the board. According to the schedule and the fact that pin5 should have a voltage of 3.3V I would assume that pin1 is the pin close to pin12 of header P9. Can anybody confirm? Thanks! Martin -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups BeagleBoard group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
