Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: neurofun

Search: Search took 0.00 seconds.

  1. Replies
    45
    Views
    7,636

    @mjs513 beta3 with changes from post #25...

    @mjs513
    beta3 with changes from post #25
    running at the default 22MHz showing 284ms
    changed to 18MHz and now showing 275ms

    unmodified beta3
    @17MHz -> 246ms
    @18MHz -> 248ms
    @19MHz -> 256ms
  2. Replies
    45
    Views
    7,636

    Located the problem in SPI.cpp around line 1281...

    Located the problem in SPI.cpp around line 1281
    changed


    CCM_CBCMR = (CCM_CBCMR & ~(CCM_CBCMR_LPSPI_PODF_MASK | CCM_CBCMR_LPSPI_CLK_SEL_MASK)) |
    CCM_CBCMR_LPSPI_PODF(2) |...
  3. Replies
    45
    Views
    7,636

    It is indeed very strange. The display i'm using...

    It is indeed very strange. The display i'm using is the 4.3" from buydisplay.
    I even wonder if it has anything to do with SPI because in my main application I also use the SPI1 bus to read the...
  4. Replies
    45
    Views
    7,636

    Did some more tests and USB Type does have some...

    Did some more tests and USB Type does have some influence.
    With this new test I get opposite results

    #include <SPI.h>
    #include <RA8875.h>

    //teensy4 SPI0 RA8875
    #define TFT_CS 10...
  5. Replies
    45
    Views
    7,636

    The slowdown is clearly visible on the display....

    The slowdown is clearly visible on the display.
    Changing clockspeed.c does not resolve the slowdown.


    Yes, I'm sure about 2940ms. But that was yesterday.
    Today the times vary around 2300ms,...
  6. Replies
    45
    Views
    7,636

    T4 @ 600MHz With this example beta 3 is about...

    T4 @ 600MHz
    With this example beta 3 is about 10x slower than beta2. 2940ms vs 283ms.

    #include <SPI.h>
    #include <RA8875.h>

    //teensy4 SPI0 RA8875
    #define TFT_CS 10
    #define TFT_RST ...
  7. Replies
    45
    Views
    7,636

    T4 @ 600MHz using this RA8875 lib:...

    T4 @ 600MHz
    using this RA8875 lib: https://github.com/mjs513/RA8875 to draw 2 different types of screens.

    With TD1.49b2
    screen1 takes about 23ms to draw
    screen2 takes about 65ms to draw

    With...
Results 1 to 7 of 7