ESP 8266 - SPI

Projects Networking, Protocols, and Devices
1

Hello,

I tried to control a 7segment display with a esp 8266 (NodeMCU v3) with the library from GitHub - esp8266/Arduino: ESP8266 core for Arduino.

I want to show a number on the display, but the display shows different numbers wich are constantly changing.
I increased the frequency divider, since I am of the opinion that the clock is too fast, but without success.

What is the difference between the H-version (HMISO,HMOSI,HCLK,HCS) and the normal version (MISO,MOSI,CLK,CS)?

Is the clock too fast? shall i set a frequenz (the library have a funktion for this)?

2

HSPI Host SPI is the free SPI interface of the esp8266. the other SPI inteface is used for the external flash memory. so normal SPI on esp8266 is HSPI

3

Juraj:
HSPI Host SPI is the free SPI interface of the esp8266. the other SPI inteface is used for the external flash memory. so normal SPI on esp8266 is HSPI

OK i get it, but the SPI ist too fast.