RP23U5XBB / Using UART1

[spatcho]

Greetings,

I have the RP23U5XBB board I started configuring here from #157 and here grblHAL/core#836 .

I started first without mpg, controlling the modbus spindle via UART0, it worked ok. Now that I want to use mpg I need the additional port.

I have created file my_machine_map.h from RP2350B_5X_map.h .

I have done those changes :

On my_machine.h :
#define BOARD_MY_MACHINE // Add my_machine_map.h before enabling this!
#define SPINDLE0_ENABLE SPINDLE_MODVFD
#define MODBUS_ENABLE 1 // Set to 1 for auto direction, 2 for direction signal on auxiliary output pin.
#define MPG_ENABLE 1 // Enable MPG interface. Requires a serial stream and means to switch between normal and MPG mode.

On my_machine_map.h (differences from RP2350B_5X_map.h)
#define SERIAL1_PORT 1
#ifndef SERIAL1_PORT
#define AUXOUTPUT0_PORT GPIO_OUTPUT
#define AUXOUTPUT0_PIN 36
#endif
#if MPG_ENABLE == 1
#define MPG_MODE_PIN AUXINPUT0_PIN
#endif

I tried first with #define MPG_ENABLE 2 but I got compilation issues.

As I understood from code, without explicit configuration, or with MODBUS_RTU_STREAM = 0 set on my_machine_map.h, modbus default to uart0, then mpg would use uart1. And if I set MODBUS_RTU_STREAM = 1, modbus would go to uart1 and mpg would take uart0.

So I tried compiling with MODBUS_RTU_STREAM = 0 then 1.

With MODBUS_RTU_STREAM = 0 :
I see communication leds blinking on uart0
I can control the spindle correctly
I see not communication leds blinking on uart1, tx is at 0, rx is at 1.

With MODBUS_RTU_STREAM = 1 :
I see communication leds blinking on uart0
I cannot control the spindle on uart0 (as expected)
I cannot control the spindle on uart1, in gsender I have the alarm 19 : modbus exception, timeout or message error
I still see no communication leds blinking on uart1, tx is at 0, rx is at 1.

My rs485 adapter accept both 3.3v and 5v. The RP23U5XBB board share the same pin for rx1 and di3 but I kept it as defaulted to rx1.

So something seems blocking the uart1 to be activated. As "#define SERIAL1_PORT 1" was initially commented on RP2350B_5X_map.h I wonder if this has been tested.

Any clue ?

[terjeio]

What is the output from the $ports command.

So something seems blocking the uart1 to be activated. As "#define SERIAL1_PORT 1" was initially commented on RP2350B_5X_map.h I wonder if this has been tested.

I am pretty sure this was tested, FYI I am away for a while so cannot retest before I am back home.

[spatcho]

What is the output from the $ports command.

So something seems blocking the uart1 to be activated. As "#define SERIAL1_PORT 1" was initially commented on RP2350B_5X_map.h I wonder if this has been tested.

I am pretty sure this was tested, FYI I am away for a while so cannot retest before I am back home.

Thanks for the answer. Probably there is a misconfiguration somewhere that I didn't get. I opened a related issue on the board project : phil-barrett/RP23CNC#15

[spatcho]

What is the output from the $ports command.

Sorry I missed this comment.

The output :

With MODBUS_RTU_STREAM = 0
[PORT:0|Modbus|1,RX|0,TX|9600,8,N,1|C]
[PORT:1|UART2|27,RX|36,TX|115200,8,N,1|F]

With MODBUS_RTU_STREAM = 1
[PORT:0|MPG|1,RX|0,TX|115200,8,N,1|C]
[PORT:1|Modbus|27,RX|36,TX|9600,8,N,1|C]

[terjeio]

Ok, can you try with:

#define MODBUS_RTU_STREAM 0
#define MPG_STREAM 1

in my_machine.h?

[spatcho]

With MODBUS_RTU_STREAM 0 and MPG_STREAM 1
[PORT:0|Modbus|1,RX|0,TX|9600,8,N,1|C]
[PORT:1|MPG|27,RX|36,TX|115200,8,N,1|C]

With MODBUS_RTU_STREAM 1 and MPG_STREAM 0
[PORT:0|MPG|1,RX|0,TX|115200,8,N,1|C]
[PORT:1|Modbus|27,RX|36,TX|9600,8,N,1|C]

I double checked. in both cases I still see no communication leds blinking on uart1, tx is at 0, rx is at 1.

[terjeio]

And the $ports output is not changing?

[spatcho]

And the $ports output is not changing?

No it's changing, I was rechecking while you answered, I miscopied, and I checked everything again, and edited my answer.

[terjeio]

I have now modified the generic board to add UART1 as serial 1 - and there is output on TX with it configured both as modbus and MPG. RX seems to work as well, data is buffered when I check with the debugger.
Note that this is with a Pico2 and UART1 wired to GPIO 8 and 9.

Are you sure your wiring/routing for UART1 is correct?

[phil-barrett]

Don't forget that you connect TX to RX and RX to TX. The output of one goes into the input of the other.

[spatcho]

Don't forget that you connect TX to RX and RX to TX. The output of one goes into the input of the other.

Yes, rx and tx need to be crossed, I can use uart0 without issues

[terjeio]

The RP23U5XBB board has some PCB links that has to be cut/soldered for UART1?

[spatcho]

I have now modified the generic board to add UART1 as serial 1 - and there is output on TX with it configured both as modbus and MPG. RX seems to work as well, data is buffered when I check with the debugger. Note that this is with a Pico2 and UART1 wired to GPIO 8 and 9.

Are you sure your wiring/routing for UART1 is correct?

I am sure that the header is correctly soldered, I checked it, but I am not sure about which pin is used for the uart1, I am gonna continue this on the board related issue phil-barrett/RP23CNC#15

[terjeio]

... I am not sure about which pin is used for the uart1

These: [PORT:1|Modbus|27,RX|36,TX|9600,8,N,1|C]

[spatcho]

... I am not sure about which pin is used for the uart1

These: [PORT:1|Modbus|27,RX|36,TX|9600,8,N,1|C]

Yes, I mean, I am not sure that should be those pins hardware wise, I cannot verify this on the board