The software drives the SPI to drive the RF chip, and I add a 0r resistor to the SPI as shown in Figure 1, I can see through the logic analyzer that the SPI corresponds to the program one by one, but I don't understand that the RF chip does not emit ...

I used STM32F407VGT6, software-driven SPI, and analyzed with a logic analyzer, and the unpacking corresponded to the program, but there is no signal for this module, that is, it has a problem