STM32 Serial Port Control with LabView

[uranyumx]

Hello,

I have a customed designed PCB with an STM32F7 microprocessor. My target is that controlling this PCB with the LabView interface through Bluetooth communication. I did some initial design on Labview and write code in Keil.

In the attached example, there is a 2.5V constant signal which is generated by the PCB. it is converted into digital form with internal ADC of the processor. Now I expect to see this digitized signal on the interface.

Do you have any suggestions about seeing the signal properly on Labview?

Thank you,

 

[uranyumx]

Hello,

I may come to close a little bit. I updated the block diagram (attached it). Now the LED is constantly ON no matter is 0 or 1. Do you have any suggestions to turn off the LED?

Thank you,

 

[KlausST]

Hi,

HAL_UART_TRANSMIT_DMA needs to be within the while(1) loop somehow. Else it can't send any data.
But you need to ensure that the previous array is already sent out.
I recommend to use two buffers alternatively.
Mind: the buffer when used in DMA is not copied befire sent out...so if you modify the buffer content during sending out you may transmit wrong data.

Klaus

 

[uranyumx]

Thank you @KlausST ! When I left from the debug mode on the Keil, It worked (the code what I posted in the second thread). In this application, when I press the right arrow on the keyboard, the LED is OFF. When I release the key, the LED is ON.

My next target is that typing some values on the LabView such as set a signal amplitude value, then expect to update in the Keil code and generate a signal what I set on the LabView. Currently, I used 'Keys Pressed' icon on the LabView. Do you have suggestion how I can update the block diagram to set values?

 

[luben111]

Use key press / control change events in LabView and send the data over UART only during the event.
Ideally you should put the whole VISA functionality into separate VI or class and talk to it with custom events or queues. If you don't do this you may experience freezing the screen or other bad effects