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  1. Replies
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    Kurt, That's a pity because you design a nice...

    Kurt,
    That's a pity because you design a nice board but the Teensy need also input.... the most important part is than not added. Please consider this because the new T4 has not decent A/D input. ...
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    Hi Kurt, Can you add also one or two AD's 12...

    Hi Kurt,

    Can you add also one or two AD's 12 bit to the board?
    Best,
    Johan
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    Hi Kurt, Looks great! Best, Johan

    Hi Kurt,

    Looks great!

    Best,
    Johan
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    @manitou Transceiver on 14000005 gives now...

    @manitou

    Transceiver on 14000005 gives now with a correction factor 14000006 that's very very good.

    I build a correction factor for 1900= 1916, 3500 = 3530, 7000 = 7060, 14000 = 14120.

    The...
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    Used Arduino IDE 1.89 and Teensyduino 1.47 I...

    Used Arduino IDE 1.89 and Teensyduino 1.47

    I connected in the test sketch 8 and 9 together, I adjusted the analogWriteFrequency(8, 30000000); //

    The serial monitor report exactly 30000000 I...
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    Frequency count Teensy 4

    I did some tests with my Teensy 4 to count the frequency of my transceiver this work till 21MHz, above I get no readings. (0.0)
    I use input 9 as input and use a small interface.

    17623

    The...
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    @Kurt, @mjs513 My newest board ..... not...

    @Kurt, @mjs513

    My newest board ..... not ready but the begin is there .... use here two AD7991...
    17535
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    @Kurt Do we still talk about the RA8875 from...

    @Kurt
    Do we still talk about the RA8875 from Buydisplay or the RA8875 from Adafruit ?
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    The frequency count works out of the box, I...

    The frequency count works out of the box, I tested it till 7MHz. Now building a small input circuit with a 74HC14 at 3.3 V

    Thanks again Mike.

    Johan
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    Aha that make sense, I will test this, if I can...

    Aha that make sense, I will test this, if I can show my transmitter frequency on the display.

    Thanks as always!
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    Mike, Do I need the code then from @Telephone...

    Mike,

    Do I need the code then from @Telephone Bill or can I use simple the FreqCount library?

    Little confusing ....

    I put the code from @Telephone Bill in the setup and can compile without...
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    And where is the code below going? CCM_CCGR2 |=...

    And where is the code below going?
    CCM_CCGR2 |= CCM_CCGR2_XBAR1(CCM_CCGR_ON); //turn clock on for xbara1
    XBARA1_SEL3 = 0x001C; //This connects XBAR1_OUT6 to XBAR1_IN28...
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    Wow this is a difficult one..... so you use pin...

    Wow this is a difficult one..... so you use pin 18 as input for your signal right?

    Is below still working?

    if (FreqCount.available()) {
    unsigned long count = FreqCount.read();
    ...
  14. Replies
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    Frequency input pin Teensy4

    Hi all,

    For my Power and SWR meter with frequency range between 1 to 50 MHZ I like to add a frequency counter.

    Two questions can I use the same diagram so as attached and witch pin on the...
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    @Kurt, How is the Adafruit RA8875 in your...

    @Kurt,

    How is the Adafruit RA8875 in your opnion.... at my place I am was not impressed so as mentioned before. Perhaps you can add fonts to the library.
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    I think there can be a clear answer to the I2C...

    I think there can be a clear answer to the I2C bus instead of reading 1000 pages.

    This needs more research....

    17343
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    The maximum I can get is 375 KHz, instead of...

    The maximum I can get is 375 KHz, instead of 1MHz.......


    void TwoWire::setClock(uint32_t frequency)
    {
    port->MCR = 0;
    if (frequency < 100000) {
    // 100 kHz
    port->MCCR0 =...
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    Hi, I don't think it's that simple for a Teensy...

    Hi, I don't think it's that simple for a Teensy 4.... see picture
    about 100KHz

    17342
    Best,
    Johan
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    void setup() { Wire1.setClock(1000000) ;...

    void setup()
    {

    Wire1.setClock(1000000) ;
    Right ?
  20. Replies
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    @neurofun The viewing angle from both displays...

    @neurofun
    The viewing angle from both displays are awesome 4.3 and the 7" I can not choose for you but the 4.3 " is a perfect screen also the 7" both 800 x 480 pixels.
    17340
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    So make your...
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    no go for a capacitive !

    no go for a capacitive !
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    good choice!

    good choice!
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    Hi all, I like to run my AD7991 I2C on 1MHz...

    Hi all,

    I like to run my AD7991 I2C on 1MHz Paul says change some numbers but what to change to get 1MHz for the I2C bus? In my case I use SDA1 an SCL1..

    Best,
    Johan
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    Hi Kurt, Please choose the right one with no...

    Hi Kurt,

    Please choose the right one with no loose touchscreen controller, those days the FT5206 is integrated on the board and you need I2C and int pin so it's simple like that go anyway for a...
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    @Kurt No ribbon cable .... on the RA8875...

    @Kurt

    No ribbon cable .... on the RA8875 display is a 40 pins header and I use normal wires but keep it as short as possible.

    Best,
    Johan
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    4.3 on the photo17330

    4.3 on the photo17330
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    4 wire SPI, no font chip, 5VDC and FT5206...

    4 wire SPI, no font chip, 5VDC and FT5206 touchscreen controller the 4.3 " is very very sharp and still 800x480 pixels.
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    Probably yes, but see the difference in real no...

    Probably yes, but see the difference in real no fonts no graphics and no buttons and the price is more or less the same. Compare both display is also difficult because the RA8875 can also used as...
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    This makes the difference, sharp as a knife, fast...

    This makes the difference, sharp as a knife, fast and we have a working library:D
    17328
    Best,
    Johan
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    Hi Kurt, The Adafruit RA8875 is a terrible...

    Hi Kurt,

    The Adafruit RA8875 is a terrible one.... I have one but I like to put it in the garbage tray. No fonts no speed.. worth less to try. I can send you a good display for free. The only...
  31. Hi Mike, Thanks for the quick answer, then I...

    Hi Mike,

    Thanks for the quick answer, then I will wait for that.
    How do I know when this ported to the 4 ?

    Best,
    Johan
  32. Is there a test sketch for the Teensy 4? Best,...

    Is there a test sketch for the Teensy 4?

    Best,
    Johan
  33. ADC not working on Teensy 4 or not know how to handle...

    Hi all,

    I try to #include <ADC.h> but I get a lot of errors....on my Teensy4

    n file included from /home/holstein/arduino-1.8.9/hardware/teensy/avr/libraries/ADC/ADC.h:45:0,

    Any...
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    See video: ...

    See video:

    https://www.youtube.com/watch?v=qZKrgPWQ_Q0&feature=youtu.be

    73' PD0LEW, Johan
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    Bechmark: SPI 23MHz screen:800x480 -...

    Bechmark: SPI 23MHz

    screen:800x480 - rotation:0
    Benchmark Time (microseconds)
    Screen fill 16472
    Test Pixel 19
    Test Pixels 12367
    Text ...
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    Aha there must be changed one line too for the...

    Aha there must be changed one line too for the RA8875Usersettings.h this will speedup the thing/
    #if defined(SPI_HAS_TRANSACTION)
    //SPI transaction enabled library----------------------
    #if...
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    Yes ... a small one : || defined(__IMXRT1062__ on...

    Yes ... a small one : || defined(__IMXRT1062__ on several place .... that's was it.
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    @mjs513, The tiny PCB is home made a AD7991...

    @mjs513,

    The tiny PCB is home made a AD7991 I2C 12 bits works also very nice with the T4.

    @Kurt,
    I included the new library's, it compiles without errors and runs smoothly.
    17326
    ...
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    Thanks for helping

    Hi all,

    Thanks for helping to get my beautiful RA8875 displays to work with the Teensy 4.

    I am so happy!

    Best regards,
    Johan
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    I will let you know how I get this to work........

    I will let you know how I get this to work..... let me make a nice story.
    17325
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    @mjs513 A bit desperate.... do you use for sure...

    @mjs513
    A bit desperate.... do you use for sure a RA8875 from Buydisplay?


    In file included from /home/holstein/Arduino/libraries/RA8875-0.79b11p10/RA8875.h:149:0,
    from...
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    First I run many displays from Buydisplay 4.3, 5...

    First I run many displays from Buydisplay 4.3, 5 and 7" runs perfectly with a Teensy 3.6.

    My test display is a RA8875 Buydisplay 4.3 " 800 x 480 pixels.

    Connections CS 10, MOSI 11 an MISO 12...
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    Hi, Perhaps I am looking wrong I dowloaded the...

    Hi,

    Perhaps I am looking wrong I dowloaded the stuff from https://github.com/mjs513/RA8875/tree/RA8875_t4 when I look into files examples I also so no benchmarks.ino .

    My test sketch is to...
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    I tested this however without results, the...

    I tested this however without results, the _includes/RA8875_CPU_commons.h is not found.

    Best,
    Johan
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    Hi all, I changed a bit the RA8875.ccp and the...

    Hi all,

    I changed a bit the RA8875.ccp and the RA8875.h and have no any errors when compiling..... connected my RA display but nothing on the screen. I noticed that the clock on 13 (LED) goes more...
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    Thanks Michael that did the job. Best regards,...

    Thanks Michael that did the job.

    Best regards,
    Johan
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    I2C and AD7991 and Teensy4

    Hi all,

    The Teensy 4...... my questions : the AD7991 works on pins 19 and 18 but not on 17 and 16 any suggestions?
    Best,
    Johan
  48. The best dual external 12 bit SPI ADC for Teensy 4

    Dear all,

    I need a high speed dual SPI 12 bit ADC for the Teensy 4 I like to use this for my power and swr meters.

    Low noise and high speed is important.... and for sure usable for the Teensy...
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    I2C maximum speed

    Hi all,

    For my projects I must know the maximum speed of the I2C bus Teensy 4 this is needed to read my external A/D converter.

    If someone know please replay.

    Best regards,
    Johan
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    That's a pitty because the RA8875 from Buydisplay...

    That's a pitty because the RA8875 from Buydisplay are one of the best displays on the market today, in one or other way there is a solution... because I have many projects that are working perfectly...
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