Using Nucleo 429ZI and implanting a simple SPI code , There are no signals on the SCK Mosi pins when sending data on SPI1

[RKore.1]

I am using SPI1 as a Master full duplex , and checking in the Nucleo 429 zi  

 PA5   ------> SPI1_SCK

There is no clock , I using a scope and testing PA5 pin on the Nucleo 429 zi

I attach the code , its very short code

Here is the link to the pin description

https://os.mbed.com/platforms/ST-Nucleo-F429ZI/

[Tesla DeLorean]

Pull the schematic, CAD Resources Tab of product page.

Trace the wire from IC pin to header(s)

Watch for solder bridges and zero-ohm resistor options

Check GPIO clocks, Check GPIO register settings.

Check AF mux mapping. Check GPIO toggles manually

[RKore.1]

Thanks Tesla

I can see the SPI1_SCK , the clk amplitude is about 0.5 volt , that is the reason i didn't see on the scope

Now i have to figure out why i don't see the MOSI

Do you have any suggestions

[waclawek.jan]

> Do you have any suggestions

Yes, he had suggestions. Read his post again. Start with the first sentence, do what it suggests, and then proceed to next one.

JW

[RKore.1]

Thanks ,

I will do what you suggest

I test the program on some new Nucleo 429 zi   that i bought from digikey ,

and in all of them it is the same result

I test the program it on SDI 1,2 and it is the same GPIO signals has 3 volt amplitude

Raz

[RKore.1]

Hi Tesla ,waclawek.jan

I did your recommended suggestions and they were OK , it was by multimeter and scope

• Watch for solder bridges and zero-ohm resistor options --- OK as in the file attached
• I did toggle one of the GPIO using software and it was working fine when measuring the pin - 0v --> 3.3 volt --> 0v

---Still have a problem ----

Is it OK that SDI SCK amplitude is 0.5Volt ?

Still do not see using a scope any signals on the MOSI pin

Mention that the pins are not connected to another board and i only measure by a scope each SDI pin

Regards

Raz

[RKore.1]

Hi Tesla

After searching , I found this link in the internet

https://github.com/stm32duino/Arduino_Core_STM32/issues/1112

I think it will help me

What is your suggestions ?

Regards

Raz

[RKore.1]

Hi Tesla

I think i found the Mosi signal , Its not PA_5 it is in in PB_5

Why it is written in the figure (Pin description) above PA_5 ad PB_5 are SPI1_MOSI

What is the difference ?

Regards

Raz

[RKore.1]

Thanks for your help Tesla

the problem is solved