NHD-1.69-160128G (SEPS525) SPI Problem

adamap

• June 24, 2020 03:04

hi,
I have a problem with the SPI interface and my SAM4E16E µC.

what did i try:
1) test the arduino example code with an arduino:

https://support.newhavendisplay.com/hc/en-us/articles/4413878318999-NHD-1-69-160128UGC3 

display works.

2) remove unused code and create an AtmelStudio project.
display works. (attachment: main_soft_spi.png / soft_spi.png)
the picture shows the first init command (regarding signal course SCL/SDI).

3) change the three low-level functions
- OLED_Command_160128RGB
- OLED_Data_160128RGB
- OLED_SerialPixelData_160128RGB
like:

void OLED_Command_160128RGB(unsigned char c)
{
    spi_select_device(SPI_MASTER_BASE, &spi_dev);
    ioport_set_pin_level(OLED_RS, LOW);
   
    spi_write_packet(SPI_MASTER_BASE, &c, 1);
    spi_deselect_device(SPI_MASTER_BASE, &spi_dev)
}

SPI clock: 1MHz
SPI Mode 3
(attachment: spi.png)

it looks similar, but the display stay dark.

do you have an idea, what i can try or change?

regards
Adam

0

• 

  adamap

  • June 24, 2020 05:29

  Problem solved.
  
  RS Pin should be HIGH in the OLED_Data_160128RGB() function, not LOW.   ;)

  0
• 

  Sergio_M

  • June 26, 2020 08:10

  Hello,
  Thank you for the update, glad to hear the problem was solved.

  0

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