M5Stamp Pico - SPI pins

LukasC

Hello, I would like to ask for your opinion. When I look at datasheet of ESP32 Pico D4, the pins for SPI are: (VSPI) CS - GPIO5, CLK - GPIO18, SPID - 23, SPIQ - GPIO19. But on the Stamp Pico pinout, there are marked as SPI pins: CS - G19, CLK - G18, SPID(MOSI) - G26, SPIQ(MISO) - G36.
When I try to use the SPI in Arduino IDE, I can't get the SPI working. Is there anybody that has some experiences with this?

Thank you very much,
Lukas

felmue

Hello @LukasC

most functions (like SPI) can be defined to use almost any GPIOs.

Try something like below:

#define SCK GPIO_NUM_18
#define MISO GPIO_NUM_36
#define MOSI GPIO_NUM_26
#define CS GPIO_NUM_19

SPI.begin(SCK, MISO, MOSI, -1);

Note: untested

Thanks
Felix

macsbug

Hello@LukasC

The pin assign is below.
m5stack / M5Unified Public
https://github.com/m5stack/M5Unified
:

LukasC

Hi,
Thank you for your comments, the problem was on my side - a short circuit of SPI pins under one chip.
Finally, the SPI works as specified.

Have a good day,
Lukas

lavanya

Hi Lukas,

Even I'm trying to interface ADS1256 ADC with Stamp PICO using SPI protocol but it is not working and I'm not able to read any data in arduino IDE. I cross-checked all connections and seems to be OK.

Any advice on this problem.