Search found 3 matches

by rith87
Thu Jan 18, 2024 5:08 pm
Forum: ESP-IDF
Topic: Multiple Devices on SPI Bus
Replies: 2
Views: 887

Re: Multiple Devices on SPI Bus

Yup, the CC1201 and DM9051 share the same SPI bus but they have their own individual CS line.
by rith87
Wed Jan 17, 2024 11:58 pm
Forum: ESP-IDF
Topic: Multiple Devices on SPI Bus
Replies: 2
Views: 887

Multiple Devices on SPI Bus

Hello folks, I have a DM9051 and a CC1201 running on the same SPI Bus. Both of them use polling transactions (spi_device_polling_transmit()) and work fine together most of the time. However, occasionally, I'll get a few errors like: E (54778) spi_master: spi_device_acquire_bus(977): Cannot acquire b...
by rith87
Thu Aug 17, 2023 12:51 am
Forum: ESP-IDF
Topic: Functions implemented in ROM
Replies: 1
Views: 648

Functions implemented in ROM

In the deep sleep wake stub example, we see: * Wake stub code must be carefully written, there are some rules for wake stub: * 1) The wake stub code can only access data loaded in RTC memory. * 2) The wake stub code can only call functions implemented in ROM or loaded into RTC Fast Memory. * 3) RTC ...