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ADC
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  • Forum Post: AM335x ADC DC characteristics

    BrandonAzbell
    At the time of this writing of the post, the AM335x datasheet does not have information about the DC characteristics of the ADC. What is the allowable voltage range of the ADC reference voltage? What is the recommended maximum impedence per input of the ADC? What is the allowable voltage range...
    on Dec 29, 2011

  • Forum Post: AM3358 mmap bus error

    Alexander Hiam
    Hello all, I've been working on the BeagleBone, running Angstrom v2011.11-core Linux. I'm writing a Python library (using Python 2.7.2) for peripheral support using the pins broken out on the expansion headers. I'm doing this using the mmap module on /dev/mem, and referring to the AM335x...
    on Jan 13, 2012

  • Forum Post: Touchscreen / ADC: error in TRM

    Qmax
    Description of ADCRANGE register in TRM Section 12.5.13 looks wrong: High_Range_Data must be written in bits 27-16 of ADCRANGE register, and not 27-12 as TRM says. In fact Starterware code uses a 0x10 bits shift. I have also verified this setting as the right one. Max
    on Mar 28, 2012

  • Forum Post: Questions about Touchscreen / ADC subsystem

    Qmax
    Hi, I need some clarifications on how TSC_ADC_SS works. Which is the size of FIFOs? In figure 12-1 of TRM it seems 64 x 16 bit. I suppose that 12 bits are the sampled value and other 4 bits are for the id tag, therefore max 64 samples. But it happens that when I read FIFO0COUNT sometimes I get...
    on Mar 28, 2012

  • Forum Post: ADC driver to read input voltage

    raja V
    Hi, I need to monitor the input voltage in my project. Is there any ADC driver available which can be used directly with AM335x linux? Regards, Raja.
    on May 29, 2012

  • Forum Post: RE: ADC driver to read input voltage

    raja V
    Hi, Can anybody answer my question. Regards, Raja.
    on Jun 11, 2012

  • Forum Post: ADC FIFO overrun!

    Guoqiang Xia
    I am doing ADC sampling continuously, not sure what will happen in the following situation. When ADC FIFO overrun happens, but the FIFO overrun interrupt is not enabled, will TSC_ADC keep going or will it disable itself? If FIFO overrun interrupt is enabled, usually what should I do to service the...
    on Jun 17, 2012

  • Forum Post: Clear HW Interrupt for ADC measurement

    Andreas Weier
    Hello, I am trying to use the ADC of the AM3359 on the ICE Board. Using HW interrupt (with sysbios) to get the ADC Value. Getting the ADC Interrupt End of sequence is working well. I think I also delete it (the Register IRQStatus & IRQStatus_Raw are == 0). But the problem is, that even if this...
    on Jun 20, 2012

  • Forum Post: AM335x TSC_ADC peripheral used for general-purpose ADC, not working, stuck on first step

    Jonathan Marrs
    Hi, I am trying to implement the TSC_ADC peripheral of the AM335x in general-purpose mode to digitize 8 different AIs (AIN0 - AIN7). As a foundation for my code, I am using adcVoltMeasure.c, found in the StarterWare examples included with the AM335x Industrial SDK 1.0.0.2. I am having trouble getting...
    on Jun 27, 2012

  • Forum Post: AM335x: 4-wire TSC with 4 general-purpose ADC channels

    Satyanarayana Reddy
    Hi, We want to use the All ADC Channels in "4-wire TSC with 4 general-purpose ADC channels" mode. Because, we have the 4-Wite Touch SCreen (Interfaced to AIN0, AIN1, AIN2 and AIN3) and 4 no's of Temprature Sensors (NTC Resistors) (Interfaced to AIN4, AIN5, AIN6 and AIN7). Is the Linux...
    on Jul 26, 2012

  • Forum Post: notation of Input Impedance of AIN[8:0]

    Okayama Gou
    Dear, I'd like to confirm whether my understandings are correct for the "Input Impedance of AIN[8:0]" in page 91 of 222 in sprs717d.pdf I'm not sure these 3 points: 1) "10-12" 2) notation of "* f" (why not "x" f expressly) 3) meaning of "f"...
    on Aug 6, 2012

  • Forum Post: Configure McASP to receive 24Bit value from ADC and pass a 32bit integer to the CPU, AM3359

    chrigima
    Hi! I'm having a little problem to conigure the McASP on an AM3359. I use an ADS1278 ADC with a Beaglebone (AM3359) running Angstrom Linux. I modified the alsa asoc drivers/codecs to read 16 24bit values through McASP (2 ADS1278 dasychained). Since I can't handle 24bit datatypes in my application...
    on Aug 9, 2012

  • Forum Post: McASP clock signals (slave mode)

    Christian Sch��rkhuber
    Hi, I want to capture audio data from a custom made 4-channel ADC-board with the beaglebone via McASP0. I want the beaglebone to be the clock-slave, so frame-sync (AFSR) and bitclock (ACLKR) are provided by the ADC. What I don't quite get is the role of the McASP's high frequency clock pin...
    on Aug 28, 2012

  • Forum Post: ADC FIFOCOUNT Register

    B. R.
    Hey guys, can you please specific how FIFO0COUNT and FIFO1COUNT registers work. I don't understand the behavior of these FIFO count registers and can only guess... Figure 12-1 in TRM says the FIFO registers are 64x deep. But why count FIFOCOUNT registers up to 127 befor starting from 0 again...
    on Aug 29, 2012

  • Forum Post: RE: ADC and GPMC questions about AM335x

    Markel Robregado
    Hi Devin, Devin Park 1. what is max clock for NAND flash? 100MHz , According to the TRM 7.1.1.1 GPMC Features. Devin Park I wonder if it can be used for temperature sensors Yes . That's what Analog to Digital converters are for. Devin Park Also I want to use 2 temp. sensors. Is it possible...
    on May 13, 2013

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