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Type: Posts; User: my_abousamra

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    [SOLVED]Closed: Re: BLE v5 dongle isn't working on Ubuntu

    It's supposed to be used as a usual BLE dongle to connect to other devices not for development. I think it was not a suitable choice at the first place
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    [SOLVED]Closed: BLE v5 dongle isn't working on Ubuntu

    Hi,

    Recently, I got this BLE v5 dongle , I plugged it to an ubuntu machine and started to check it using these commands

    $ sudo hciconfig -a
    No output

    $ sudo hcitool dev
    Devices:
  3. [SOLVED]Closed: Re: Store variable between microcontroller resets using noinit memory problem

    Unfortunately, I don't have a debugger. I put this section after data and bss sections so no absolute address. part of the problem that I don't know how to do it (in another words, does what I did is...
  4. [SOLVED]Closed: Store variable between microcontroller resets using noinit memory problem

    Hi,

    I want to store a variable value between microcontroller resets (not power off). The case is that the microcontroller goes to sleep and woke up by interrupt caused by a button press where in...
  5. Closed: Atmel's AT91SAM7X USB write sometimes takes long time

    Hi,

    I'm using Atmel's AT91SAM7X microcontroller and Atmel device drivers, when I try to write data to USB (CDC driver) sometimes it takes relatively long time (1~2 seconds) which affects CPU load...
  6. Closed: Re: SD card write operation interruption problem

    What do u mean by spi interface is fully static?

    Note that the interrupt itself doesn't cause the sd card hanging but the spi communication to the adc in the interrupt handler cause that problem...
  7. Closed: SD card write operation interruption problem

    Hi there,

    I'm working on an application that writes double blocks to sd card ,which is connected to spi-0 bus alone, every 50 ms and lasts for about 2ms and at the same time receiving interrupts...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    I tested them and they are zero volts then I shorted pins 2 & 3 and pins 16 & 17 externally and finally the IC started acknowledging the controller :)

    Thank you
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    Hmmm,

    The hardware engineer has designed the circuit that way and I thought both things wiring only one pin of them or wiring all pins to ground are the same.

    Generally, I'll discuss the issue...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    Answers are above

    - - - Updated - - -



    I checked the Vcc pin and it's 3.3V. How can I ensure that the IC is working?
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    Finally, I could make it.

    Attached, A photo for the SDA, SCL in small scale and 2 other photos with larger scale for the start and the end of the communication
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    I'm not so familiar with oscilloscope but I can only see the signal when the channel get triggered or it can't see any.

    Now, I tried to send the RTC all address 7-bit address available from 0 to...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    hmmm,

    I got another probe but unfortunately my scope doesn't support triggering the two channels simultaneously and I don't have logic analyzer!
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    Sure, It was the first thing to try, Note that controller only allocate 7 bits for slave address in pTWI->TWI_MMR so assigning this value will ignore the most significant bit and the address will be...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    This is the sending function


    /* Send data to device */
    void vTWI_SendData (uint8 u8DeviceAddress, uint8 * u8Data, uint8 u8DataLength)
    {
    AT91S_TWI *pTWI = AT91C_BASE_TWI;

    /* load device...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    Datasheet says that the device address is 0xD0 and I shifted it right to get the address 0x68 then the R/W bit

    - - - Updated - - -



    lowering the pull up resistors to 1k5 doesn't solve the...
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    This clock wave was generated from the controller and I don't know why its shape like that. anyway I will change the pull up resistors the try again
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    [SOLVED]Closed: Re: RTC not acknowledging slave address

    I'm using 10K as pull up resistors soI will try to use lower resistors value like 1k5
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    [SOLVED]Closed: RTC not acknowledging slave address

    Hi there,

    I'm writing a driver for m41t83 RTC IC and on AT91SAM7X (based on ARM7).

    I'm trying to start communication with it over TWI (fast mode) and I have no response from the RTC (always get...
  20. Closed: free multiprocessing and multithreading debugger for Linux

    Dear all,

    Does any one know any free multiprocessing and multithreading debugger for Linux?
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    Closed: busybox less search

    To what ever his name

    I think talking to u is wasting of time.
    U don't even want to understand any thing from what I wrote before and try to talk in useful things which may make our discussion...
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    Closed: what is busybox

    1. thx KamalS

    2. again popatola

    first, it seems that u don't understand what i've said before . u don't have to waste ur time in answering posts u don't like. u can easily skip it. it doesn't...
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    Closed: linuxbusybox

    1. thx Marcel
    2. to papalota

    if u can't reply in a respectable manner, u shouldn't reply from the beginning and waste ur time with ur silly words.

    hope to understand
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    Closed: busybox top

    hi all,

    what is linux busybox?
    plz can any one explain it in a simple way and give any examples (if he can)
    really all web sites write the same ununderstood explainations

    thx in advance
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