PSoC4 SPI LoRa PROBLEM

Hello to everyone,
I'm new to PSoC and trying to learn. I have the PSoC4 CY8CKIT-041 kit. I'm struggling to run the LoRa module by communicating with SPI. The LoRa module is a module that I know well and that I run on processors such as STM32, Renesas. But I'm having trouble with PSoC, I'm stuck especially on SPI. I have attached pictures of SPI TX and RX functions and added the project separately. You can check. Can you help me for sending and receiving commands in SPI? Can you create the correct command functions for me? Thank you from now.

lesson1.zip

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KennyMillar over 2 years ago

Hi MKocaman

Wow - PSoC 4 - that takes me back a wee bit!

So a few things first that I'll check with you.

In the SPI_Tx function you are resetting and setting LoRa_RESET - are you shure that's right? (I don't have the LoRa module to check with).

Also, I see there is a pin called LoRa_NSS - are you sure you are handling that correctly? Shouldn't you be driving that low for SPI transactions?
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KennyMillar over 2 years ago

Hi MKocaman

So in your function Modul_Reset() in LoRa.c you set the reset and NSS pins high, then delay, then set the RESET pin low again.

This leaves the NSS pin high. I don;t see it being referenced anywhere else.

Presuming that RESET is 'active high' then you should be toggling NSS before/after the SPI transactions, not RESET

I hope this makes sense.
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MKocaman over 2 years ago in reply to KennyMillar

Oww you are right, in the parts you mentioned LoRa_NSS_Write(1); and LoRa_NSS_Write(0); will be. I made a wrong copy while in a hurry. Thank you for alerting me. But after correcting the relevant parts, nothing changes.

My main problem is that I cannot do the SPI receiver and transmitter commands correctly in PSoC.
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MKocaman over 2 years ago in reply to KennyMillar

KennyMillar I will be very pleased if you can help me on this matter.
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KennyMillar over 2 years ago in reply to MKocaman

Can you tell me which LoRa module you are using? Do you have a link to a datasheet?
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MKocaman over 2 years ago in reply to KennyMillar

I am using RFM95W. But this is not so important. Because I have already run and use this module on other platforms. There is nothing wrong with the LORA commands either. Only I can't communicate with LORA over PSOC SPI. So there is probably something wrong with my SPI commands or configuration. I only need functions used in PSOC to send commands and read data.
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shabaz over 2 years ago in reply to MKocaman

Are there no existing examples of SPI for this old processor, that could be copied? Or can you stick a logic analyzer at least, on the lines, to see if they are doing what you expect?
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