test code?

[c-morley]

Do you have test code to try?
I would like to use STM32 with Arduino IDE.
Did you know that there is a guy who did something similar with the STM32 f1.f4 but using the STM IDE (which is very complicated)

https://forum.linuxcnc.org/41-guis/38222-usb-haas-operator-panel-interface?start=20

[fdarling]

I am not sure what you are asking for. I was using a Teensy 3.2 which uses an ARM chip from NXP/Freescale, but it should also work on an STM32. As I said in the README, the code is easily adapted to another microcontroller and framework.

[c-morley]

As I understand it your code is the library to do sserial.
I was looking for example code using your library.
Blinking the LED on each linuxcnc read request would probably be enough.
I'm very new to micros

[fdarling]

My code isn't actually written in library form, it's a template. I got help from Peter Wallace of Mesa Electronics, as well as used some code on LinuxCNC's forums as a guide. I don't 100% implement the LPB8 protocol, nor do I claim to. I would love to eventually make this into library form with an API and such, but at the moment it's just a functioning reference. If you aren't versed in C programming nor microcontroller development, there might be a steep learning curve.

That being said, the code actually does blink an LED currently in response to communication with LinuxCNC. It's set up to have an input and output 32-bit integer values. The "input" value (from the device to LinuxCNC) is just a counter to show that it's changing with every read, and the "output" value is stored but not actually used at the moment. See these lines:

preparing data going out to LinuxCNC:

mesa-smartserial-device-template/Mesa_SmartSerial_Device_Template_Project/Mesa_SmartSerial_Device_Template_Project.ino

Line 318 in a29ee45

pdata_out.input = millis();

using data coming from LinuxCNC:

mesa-smartserial-device-template/Mesa_SmartSerial_Device_Template_Project/Mesa_SmartSerial_Device_Template_Project.ino

Lines 324 to 333 in a29ee45

	memcpy(&pdata_in, pdata_in_next, sizeof(pdata_in));
	#ifdef SHOW_PDATA_IN
	Serial.printf("P: 0x%08X, %i\r\n", pdata_in.output, Serial.available());
	#endif
	// TODO actually write outputs!
	// show the process data activity
	static uint8_t cnt = 0;
	cnt++;
	digitalWriteFast(LED_BUILTIN, (millis() & 0x100) ? HIGH : LOW);

where the pins are defined:

mesa-smartserial-device-template/Mesa_SmartSerial_Device_Template_Project/Mesa_SmartSerial_Device_Template_Project.ino

Lines 80 to 101 in a29ee45

	.pdd = {
	.RecordType = LBP_PDD_RECORD_TYPE_NORMAL,
	.DataSize = 32,
	.DataType = LBP_PDD_DATA_TYPE_BITS,
	.DataDirection = LBP_PDD_DIRECTION_OUTPUT,
	.ParamMin = 0.0,
	.ParamMax = 0.0,
	.ParamAddress = PARAM_BASE_ADDRESS,
	"None\0Output"
	}
	},
	{
	.pdd = {
	.RecordType = LBP_PDD_RECORD_TYPE_NORMAL,
	.DataSize = 32,
	.DataType = LBP_PDD_DATA_TYPE_BITS,
	.DataDirection = LBP_PDD_DIRECTION_INPUT,
	.ParamMin = 0.0,
	.ParamMax = 0.0,
	.ParamAddress = PARAM_BASE_ADDRESS+4,
	"None\0Input"
	}

Again, this will have a steep learning curve if you don't have the background knowledge in C, microcontrollers, and the Mesa Electronics documentation on the protocol.

[c-morley]

Ok thanks - I misunderstood what you meant by template.
Thanks for the tips - I'll see what i can accomplish.