How i can disable automatic CS from SPI

[BugSimpson]

good evenig,

i use a c3 in spi master mode.
which register must be write to handle the cs pin by my self?
i have try to disable the mapping for FSPICS0 but i become a cs from about 40ns (see picture)

thx

[username]

.spics_io_num = -1, // GPIO pin for CS signal, or -1 if not used.

[BugSimpson]

I dont use the framework.
I want to now how I can do this with Register…

[ok-home]

watch TRM
disable in spi registers

esp32c3 trm

spi_cs.JPG (93.95 KiB) Viewed 2063 times

or do not connect in gpio iomux/matrix

spimux.JPG (149.5 KiB) Viewed 2063 times

or set gpio level to 1

Code: Select all

gpio_reset_pin(CS);
gpio_set_direction(CS,GPIO_MODE_OUTPUT);
gpio_set_level(CS,1);

[BugSimpson]

i allready have try this, have you seen my picture in #1?
there you can see short spikes.. i dont no why^^

[ok-home]

if you get this picture after this

Code: Select all

#define CS 1
gpio_reset_pin(CS);
gpio_set_direction(CS,GPIO_MODE_OUTPUT);
gpio_set_level(CS,0);

look for external sources of interference
this code completely disables all interfaces and sets logic 0 on the CS output (GPIO1).