As an addendum, the circuit in my post would work at 3.3 V as well. On Tuesday, November 5, 2013 9:12:14 AM UTC-6, Matthew Witherwax wrote: > > I believe my blog post http://blog.lemoneerlabs.com/post/Hearing-aidswill > solve your issue. You need to build an actual inverter (or buy an IC > to do it for you). > > On Tuesday, November 5, 2013 3:52:54 AM UTC-6, Gustavo Oliveira wrote: >> >> I guess I did some mistake answering back there =P >> It is in UART_RX. >> >> I search the internet and found that maybe I'm getting the inverted >> messages, all the 1s as 0s and the 0s as 1s. >> >> >> On 5 November 2013 09:50, Gustavo Oliveira <[email protected]> wrote: >> >>> 1) I'm using the 3.3V pin, so the voltage is acceptable in p9_22. >>> >>> 2) What do you mean by setttings, the fields when I export the pin? Or >>> the pin mode? I think mine are ok, what should they be? >>> >>> 3) I tried many applications, python scripts, c scripts, minicom... >>> >>> >>> On 5 November 2013 05:26, Maxim Podbereznyy <[email protected]> wrote: >>> >>>> 1) I would place a voltage translator or a simple voltage divider based >>>> on two resistors to reduce 5 volts to the acceptable 3.3V. >>>> >>>> 2) check the pinmux settings for that pin >>>> >>>> 3) what terminal application do you use to read data? Check the serial >>>> port parameters and don't forget to disable the hardware flow control if >>>> any >>>> 05 нояб. 2013 г. 3:55 пользователь "Gustavo Oliveira" < >>>> [email protected]> написал: >>>> >>>>> Hi, thank you for quick reply, >>>>> I'm using a BeagleBone and Ubuntu 12.04. >>>>> >>>>> I have the TX connected to p9_22, which is uart2 RX. >>>>> >>>>> On Monday, November 4, 2013 7:38:06 PM UTC, lisarden wrote: >>>>>> >>>>>> hi! >>>>>> >>>>>> what board do you use and what OS? >>>>>> >>>>>> your datasheet says that VCC is +5V and the TX pin also work in 0-VCC >>>>>> range. If you use beaglebone it accepts only 3.3V, however there can be >>>>>> options >>>>>> >>>>>> >>>>>> 2013/11/4 Gustavo Oliveira <[email protected]> >>>>>> >>>>>>> Hello, >>>>>>> I'm trying to read from a LV-Maxsonar-EZ0 using the serial interface. >>>>>>> >>>>>>> I have connected the wires correctly and I have placed an overlay in >>>>>>> uart2. >>>>>>> The problem is the data I'm reading from the sensor. I can only get >>>>>>> garbage, but its not completely wrong because the data changes >>>>>>> according to >>>>>>> the distance to obstacle. >>>>>>> >>>>>>> The datasheet for the sensor can be found here: >>>>>>> datasheet<http://www.maxbotix.com/documents/MB1000_Datasheet.pdf> >>>>>>> . >>>>>>> >>>>>>> I searched google for a day and couldn't find anything... >>>>>>> Someone posted in a raspberry pi forum that the problem is the >>>>>>> meaning of 1s and 0s, but I changed active_low to 1 and I got the same. >>>>>>> >>>>>>> I'm not very proficient with electronics, so I might take some time >>>>>>> following instructions. >>>>>>> Nonetheless all the help will be welcome. >>>>>>> >>>>>>> -- >>>>>>> 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...@**googlegroups.com. >>>>>>> For more options, visit >>>>>>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>>>>>> . >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> LinkedIn - >>>>>> http://www.linkedin.com/in/**maximpodbereznyy<http://www.linkedin.com/in/maximpodbereznyy> >>>>>> Company - >>>>>> http://www.linkedin.com/**company/mentorel<http://www.linkedin.com/company/mentorel> >>>>>> Facebook - >>>>>> https://www.facebook.com/**mentorel.company<https://www.facebook.com/mentorel.company> >>>>>> >>>>> -- >>>>> 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 [email protected]. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to a topic in the >>>> Google Groups "BeagleBoard" group. >>>> To unsubscribe from this topic, visit >>>> https://groups.google.com/d/topic/beagleboard/gOK8R4_mRzw/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> [email protected]. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> >>
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