Other Parts Discussed in Thread: CC1200DK, CC1200
Tool/software:
Hello,
We evaluating the CC1200 board for our project. For this we have a CC1200DK. The development kit works without any issues, but we are also trying to connect the CC1200 to our own board. The CC1200 does not respond to our SPI commands when using our own board, the MISO always stays high. Looking at the datasheet and user manual, this seems like we have an issue with the power-on / start-up sequence.
On startup we send the 0x30 SRES command (though this does not seem to be necessary for the user manual?). After that we try to wait until the MISO goes low with the NCS low. However SO does not ever go low (even if we wait long than what is displayed on the scope below).
(blue: NCS, purple: CLK, cyan: MOSI, yellow: MISO)
Zoomed in view of the reset command:
Is there a step we are missing? What could be the cause of this?
