CC1352P: Share SPI driver between external NVS and other SPI peripherals

Bill Kuckuk

Part Number: CC1352P
Other Parts Discussed in Thread: SYSCONFIG

I'm looking for an example/document on how to use a single SPI driver/pins along with several ChipSelects, one being the external serial flash used for OTA updates, others for an LCD controller and several Temperature Sensors. Can this be configured using the .sysconfig tool?

over 4 years ago

0 YiKai Chen over 4 years ago

Guru 735705 points

No, this cannot be configured directly by sysconfig. I suppose you should use different CS pins for different SPI slave and create a SPI resource mutex in your application to control usage timing of different SPI slave.

+1 Ryan Brown1 over 4 years ago

TI__Guru**** 223727 points

Hi Bill,

I am not aware of any TI examples which display this capability. Furthermore, SysConfig SPI modules and the SPI TI Driver are not intended to select between multiple devices using a single peripheral. My suggestion is that you create a three-pin SPI instance and control multiple CS pins through software, which was also suggested by YK.

Regards,
Ryan

0 Bill Kuckuk over 4 years ago in reply to Ryan Brown1

Expert 1305 points

Thanks Ryan/YK.

I now see that YK answered this same question in this post: https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/1078930/cc2651r3-concurrently-using-spi-bus-for-ota-and-other-peripherals

We're also considering using the Sensor Controller and see this post related to this same issue: https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/414227/sharing-spi-between-cc26xx-host-and-sensor-controller

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CC1352P: Share SPI driver between external NVS and other SPI peripherals