Mark, thanks! Em qui, 21 de jan de 2021 00:38, 'Mark Lazarewicz' via BeagleBoard < beagleboard@googlegroups.com> escreveu:
> Hello Pedro > > Is their a block diagram that shows the Interconnect peripherals in TRM? > That used to be pretty standard in TRM and answers #1 > > I avoid Linux so I can't answer #2 but I'm pretty sure this question was > asked before in this group. > > Lastly refine your Google arguments I did find this but it may be for bare > bones system. > > > > https://e2e.ti.com/support/processors/f/791/t/458311?AM335x-PRU-access-to-I2C-and-other-peripherals-on-L4-PER-bus > > > I would start with the block diagram for L4 > > Lastly Mark Yoder a professor who teaches embedded Linux has various > tutorial and cookbooks. He's very gifted and his documents are clearly > written and updated. Dig around their last after understanding what's > possible would be my approach. > > You know what they say about about too many cooks in the Kitchen Pedro? > > They spoil the soup 🤔🤗 > > If you do some research and then narrow down the specifics you won't be > misled > > Hopefully I've offered something positive to help you. > > Mark > > > > > Sent from Yahoo Mail on Android > <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature> > > On Wed, Jan 20, 2021 at 8:10 PM, Pedro Henrique Fonseca Bertoleti > <phfbertol...@gmail.com> wrote: > Hi everyone. My name is Pedro Bertoleti and I'm from Brazil. > > I'm learning about the PRUs on BeagleBone (I'm using BeagleBone Black > board) and I wanna read IMU and another I2C sensors in PRU firmware (to be > able to implement some motion algorithms and stuffs like that in PRU > firmware, due to its real-time scope). > > However, I'm not sure on how to use I2C in PRU. Per my understanding: > > A) PRUs have no hardware dedicated to I2C (nor SPI) > B) I've seen some SPI examples with PRU on Internet, however in all of > them SPI communication was made using bit-bang technique. > > So, would you help me answering the following questions? > > 1) Do I need bit-banging to communicate PRU to I2C devices? I mean, isn't > there another way to use I2C in PRU? > 2) If answer above is yes, is there an way to change gpio direction (input > to outut and vice versa) inside PRU firmware? I ask this because, as I read > so far, only config-pin (Linux side) can "enable" a gpio to PRU and set its > direction, and glio direction change will be needed if I need to make I2C > using bit-bang technique. > > Please, would anyone shed some light on it? > > > > Thanks in advance. > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAJK9pqfpzE1n7ZY%2BFN2px7uKyYtBVEaj3Acg2dAw7qOb0bUwhA%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAJK9pqfpzE1n7ZY%2BFN2px7uKyYtBVEaj3Acg2dAw7qOb0bUwhA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/1412944254.2544582.1611200267458%40mail.yahoo.com > <https://groups.google.com/d/msgid/beagleboard/1412944254.2544582.1611200267458%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAJK9pqdVZTq5R3W64Fkpgy1bq6mPbG999J1_Jk55%2B5UFud8ePw%40mail.gmail.com.
