LinuxCNC + Orange Pi (allwincnc)

allwincnc.github.io/

Help is needed for the Spindle encoder.
I have a Lathe setup running with X-Z axis.
Spindle working for commanded speed.
The shared home switch also working.
But I have phase-A on pin 8.
Index on pin 10.
in hal show nothing to show for encoder related. 
Please look at my spindle.hal for modifications.
   

Small progress, now phase A working. but hal hal show encode.0.velocity do not match with commanded S300 M03 in MDI.
Tried to run   G76.ngc do not run.

[code]I hope to get some guidance on the issue regarding the ARISC driver.

I am currently adapting a new development board, which is similar to the Raspberry Pi and Orange Pi. I am not quite sure how to configure some of the settings in the `api.h` file. Where should I obtain these configuration details from in the chip's manual?


[code][code][code]#ifndef _API_H
#define _API_H

...
#define ARISC_CPU_FREQ          450000000 // Hz
#define ARISC_FW_BASE           (0x00040000) // for ARM CPU it's 0x00040000
#define ARISC_FW_SIZE           ((8+8+32)*1024)
#define ARISC_SHM_SIZE          (4096)
#define ARISC_SHM_BASE          (ARISC_FW_BASE + ARISC_FW_SIZE - ARISC_SHM_SIZE)
#define GPIO_BASE               0x01c20800
#define GPIO_R_BASE             0x01f02c00
#define GPIO_BANK_SIZE          0x24

#define GPIO_PORTS_MAX_CNT      8
#define GPIO_PINS_MAX_CNT       24
#define PWM_CH_MAX_CNT 16
#define PWM_WASTED_TICKS (160/2) // number of ARISC ticks wasted for calculations
...


static inline
void shmem_deinit(void)
{
    munmap(_shm_vrt_addr, ARISC_SHM_SIZE);
    munmap(_gpio_vrt_addr, 4096);
    munmap(_r_gpio_vrt_addr, 4096);
}

#endif


Are there any additional configuration changes needed apart from the ones mentioned above?

Thank you for your help.

Quick question on this. 

Is there a way to configure the arisc module to control a cw and ccw pulse rather than step/dir ?

I got it running just fine with step/dir, but i have a rather old and somewhat difficult to change servo/amp that can only be run using cw and ccw pulse mode.

Thanks in advance.

MX_Master wrote:

Hi, guys. Let me introduce a tiny project of mine..

My first single board PC was the Orange Pi One. And it's really fun to use such boards for a hobby projects But we also can use them as a small CNC controllers too. It's really sad there are no armhf packages in the LinuCNC dists repo. So my first try was the Machinekit with RT-PREEMPT kernel built using Armbian. And it works. But without a GPIO driver it was just a simulator. After a few weeks of learning I made a GPIO driver by myself. And it works just fine

My next step of researching was a "big latency" issue (50-70 us). Many ARM boards has a worst latency values using the RT-PREEMPT kernel. A steps rate with such latency values was terrible. A few months later I found an info about additional built-in RISC CPU core. Using this core for the fast pins toggling was a good idea

At this moment I have a working pair of HAL driver and the RISC core firmware. Steps rate now very high (up to 1 MHz). Also I made a quick installer script. You need one of the Armbian images to install it. Supported boards are Nano/Banana/Orange Pi with Allwinner H3 SoCs installed.

Attention! Project support is ended. Use it on your own risc.

allwincnc.github.io

Love the "Use at your own RISC"!!