# How to use two SPI busses with CB1 on Manta M8P

**URL:** <https://klipper.discourse.group/t/how-to-use-two-spi-busses-with-cb1-on-manta-m8p/19219>\
**Category:** General Discussion\
**Created:** [October 5, 2024, 12:01pm UTC](https://klipper.discourse.group/t/how-to-use-two-spi-busses-with-cb1-on-manta-m8p/19219 "2024-10-05T12:01:05Z")\
**Posts on this page:** 1\
**Showing post:** 57

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**Author:** ![limefrog](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/limefrog/32/9762_2.png) [@limefrog](https://klipper.discourse.group/u/limefrog)\
**Post date:** [October 16, 2024, 1:58am UTC](https://klipper.discourse.group/t/how-to-use-two-spi-busses-with-cb1-on-manta-m8p/19219/57 "2024-10-16T01:58:55Z")

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Reversed MOSI/MISO and got:

> Klipper meldet: SHUTDOWN
> 
> Internal error during ready callback: Invalid ads1220 reset state (got [0xff, 0xff, 0xff, 0xff] vs [0x0, 0x0, 0x0, 0x0]).  
> This is generally indicative of connection problems  
> (e.g. faulty wiring) or a faulty ADS1220 chip.

Reversed MOSI/MISO again and keeps the same.  
May I’ve roasted my ADS already?

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