Rock PI 4C Failed to initialize SPI

#1

Hi,
I have try the https://wiki.radxa.com/Rockpi4/dev/libmraa
This works : mraa-gpio list
But i can’t initialize SPI.
On DietPi with buster.
Do you have any advize ?
Thanks a lot.

#2

Hello! I have reproduced your question.
This seems to be the reason for the inconsistent image configuration.
When I open spi1 in Dietpi, the device is /dev/spidev1.0,
but mraa needs to identify is /dev/spidev32765.0.

New Ihave found the solution as follow:
When using spi 1:
1.Modify the /boot/armbianEnv.txt

verbosity=4
bootlogo=false
overlay_prefix=rockchip
fdtfile=rockchip/rk3399-rock-pi-4b.dtb
rootdev=UUID=dfa3ab95-cede-4159-9841-4e31bafe853e
overlays=spi-spidev
param_spidev_spi_bus=1
rootfstype=ext4
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u
docker_optimizations=off

2.Create a soft link

ln -sf /dev/spidev1.0 /dev/spidev32765.0

3.Modify spi.c

/* SPI declaration */
#define SPI_BUS 1

4.Compilation and run

gcc spi.c -o spi -lmraa
./spi

0xaa
0xaa
0xaa

when using spi 2, it must be

overlays=spi-spidev
param_spidev_spi_bus=2

ln -sf /dev/spidev2.0 /dev/spidev32766.0

/* SPI declaration */
#define SPI_BUS 0
#3

Thank you for your help, but have i make a wrong thing :
root@DietPi:/# nano /boot/armbianEnv.txt
root@DietPi:/# ln -sf /dev/spidev1.0 /dev/spidev32765.0
root@DietPi:/# ln -sf /dev/spidev2.0 /dev/spidev32766.0
root@DietPi:/# nano spi.c
root@DietPi:/# gcc spi.c -o spi -lmraa
root@DietPi:/# ./spi
Failed to initialize SPI

root@DietPi:/# nano spi.c
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>

/* mraa header */
#include “mraa/spi.h”

/* SPI declaration */
#define SPI_BUS 1

/* SPI frequency in Hz /
#define SPI_FREQ 400000
int
main(int argc, char* argv)
{
mraa_result_t status = MRAA_SUCCESS;
mraa_spi_context spi;
int i, j;

   /* initialize mraa for the platform (not needed most of the times) */
   mraa_init();

   //! [Interesting]
   /* initialize SPI bus */
   spi = mraa_spi_init(SPI_BUS);
   if (spi == NULL) {
       fprintf(stderr, "Failed to initialize SPI\n");
       mraa_deinit();
       return EXIT_FAILURE;
   }

   /* set SPI frequency */
  status = mraa_spi_frequency(spi, SPI_FREQ);
   if (status != MRAA_SUCCESS)
       goto err_exit;

   /* set big endian mode */
   status = mraa_spi_lsbmode(spi, 0);
   if (status != MRAA_SUCCESS) {
       goto err_exit;
   }
   while(1) {
       printf("0x%x\n",mraa_spi_write(spi, 0xaa));
   }

err_exit:
mraa_result_print(status);

   /* stop spi */
   mraa_spi_stop(spi);

   /* deinitialize mraa for the platform (not needed most of the times) */
   mraa_deinit();

   return EXIT_FAILURE;

}

root@DietPi:/# nano /boot/armbianEnv.txt
verbosity=4
bootlogo=false
overlay_prefix=rockchip
fdtfile=rockchip/rk3399-rock-pi-4b.dtb
rootdev=UUID=dfa3ab95-cede-4159-9841-4e31bafe853e
overlays=spi-spidev
param_spidev_spi_bus=1
overlays=spi-spidev
param_spidev_spi_bus=2
rootfstype=ext4
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u
docker_optimizations=off
console=serial

root@localhost:/# cat boot/hw_intfc.conf

Hardware Interface Config

For more details, check https://wiki.radxa.com/Rockpi4/hardware/devtree_overlays.

Set “on” to enable the optional hardware interfaces while set “off” to disable.

intfc:pwm0=off
intfc:pwm1=off
intfc:uart2=off
intfc:uart4=off
intfc:spi1=on
intfc:spi2=on
intfc:i2c2=off
intfc:i2c6=off
intfc:i2c7=off

Devicetree Overlay Enable, uncomment to enable .dtbo under /boot/overlays/.

EEPROM on I2C2

#intfc:dtoverlay=at24c02

Serial console on UART2

#intfc:dtoverlay=console-on-ttyS2

Serial console on UART4

#intfc:dtoverlay=console-on-ttyS4

Dummy spi device on SPI1 for test. Need set: intfc:spi1=on

intfc:dtoverlay=devspi1

Dummy spi device on SPI2 for test. Need set: intfc:spi2=on

intfc:dtoverlay=devspi2

PCIE running on GEN2 mode

#intfc:dtoverlay=pcie-gen2

ALLNET 4duino B10/B11 two-coloe-led module on 40-pin Header Pin#35 and Pin#36

#intfc:dtoverlay=two-color-led

waveshare 3.5inch lcd (B v2) on SPI1. Need set: intfc:uart4=off intfc:spi1=on

#intfc:dtoverlay=spi1-waveshare35b-v2

waveshare 3.5inch lcd © on SPI1. Need set: intfc:uart4=off intfc:spi1=on

#intfc:dtoverlay=spi1-waveshare35c

spi flash on SPI1. Need set: intfc:uart4=off intfc:spi1=on

#intfc:dtoverlay=spi1-flash

#hifiberry-dac
#intfc:dtoverlay=hifiberry-dac

#hifiberry-dacplus on I2C7. Need set: intfc:i2c7=on
#intfc:dtoverlay=hifiberry-dacplus

#enable raspberry pi official 7 inch LCD support
#intfc:dtoverlay=raspberrypi-7-inch-lcd

#enable gt9xx touchpanel
#intfc:dtoverlay=gt9xx

setting cpu frequency over-2GHz

#intfc:dtoverlay=cpufreq

Add imx219 camera module support. Need disabled ov5647 camera module.

#intfc:dtoverlay=imx219

Add ov5647 camera module support. Need disabled imx219 camera module.

#intfc:dtoverlay=ov5647

Add w1 on GPIO4_D6 to support devices such as DS18B20.

#intfc:dtoverlay=w1-gpio4-30

can function of waveshare rs485 can hat on SPI1. Need set: intfc:uart4=off intfc:spi1=on

#intfc:dtoverlay=spi1-mcp2515-can0

#4

If you set overlay like this, only spi bus 2 is enabled.

Can you remove these two lines and test SPI-1 again?

overlays=spi-spidev
param_spidev_spi_bus=2
#5

Thanks, this is good now when i make this :
root@DietPi:/# ls dev/spi*
dev/spidev1.0

But, i always have :
root@DietPi:/# ./spi
Failed to initialize SPI

root@DietPi:/# ./a.out
Failed to initialize SPI

#6

hello!
When you run this commands:

sudo apt-get install -y rockchip-overlay && sudo apt-get install -y rockpi4-dtbo

the overlay config file /boot/hw_intfc.conf will be generated, but it just can be use in Radxa RockPi’s image like ubuntu system and debian system.

DietPi is a Armbian system, it’s overlay config file is /boot/armbianEnv.txt.

And these two spi devices cannot be used at the same time.

#7

Ok, what can i do for initialize spi in armbian/debian OS ?

#8

You can like this to initialize spi device.

#9

Thanks, i will try this. Another question, if i have a software that use spi, do i have to make soft link, or can i use SPI 1.0 ?

#10

Does your software require the use of libmraa？
If not, you can try no to make soft link, to test you conjecture.

#11

I don’t think it use it. Many thanks, i try this.

#12

It seems the application works whith spidev1.0
But now, i have to upsize the buffer of this spidev
i have this :
déc. 17 13:10:26 DietPi DuetControlServer[3093]: [warn] Kernel SPI buffer size i
s smaller than RepRapFirmware buffer size (4096 configured vs 8192 required)

Can you tell me how to do with dietpi ?

Thanks.

#13

Hi, did you ever figure out how to increase the buffer size? I’ve stumble on the same problem.

#14

No, i don’t. let me know if you have a solution.

#15

With this approach and the /boot/armbianEnv.txt file - can I have both SPI 1 and 2 working?

#16

Hello, i am also wondering about enabling both SPI as i try get a 2x CAN-HATMCP2515 module to work with the RockPi 4se board.