Search found 2276 matches

by ESP_Sprite
Fri Feb 22, 2019 3:01 am
Forum: General Discussion
Topic: (answered) error checking i2c_cmd_link_create()?
Replies: 2
Views: 70

Re: error checking i2c_cmd_link_create()?

You should be able to see if the result equals NULL. If it is, you're out of memory. Aside from that, nothing can go wrong with that function.
by ESP_Sprite
Fri Feb 22, 2019 2:59 am
Forum: General Discussion
Topic: esp32 linker script to build a app for direct execution from flash
Replies: 1
Views: 50

Re: esp32 linker script to build a app for direct execution from flash

None are applicable, as we use our own linker script (that actually gets generated on the fly) in esp-idf, see esp-idf/components/esp32/ld. Also, if you compile something with esp-idf, it already is compiled in such a way that most of the program gets executed directly from flash; we place some rout...
by ESP_Sprite
Thu Feb 21, 2019 9:05 am
Forum: ESP32 Arduino
Topic: Broken I2C communication while using wifi!
Replies: 10
Views: 220

Re: Broken I2C communication while using wifi!

Are you sure you don't have power supply issues? Power use when WiFi is in use can be really spiky, and if you have a somewhat janky setup (read: breadboard, long jumper wires, no decoupling) that can lead to issues.
by ESP_Sprite
Thu Feb 21, 2019 9:02 am
Forum: ESP32 IDF
Topic: QSPI wrong data
Replies: 1
Views: 65

Re: QSPI wrong data

What flash chip are you trying to interface with?
by ESP_Sprite
Thu Feb 21, 2019 8:59 am
Forum: ESP32 IDF
Topic: How do I access the contents of the CW generator / DAC?
Replies: 2
Views: 95

Re: How do I access the contents of the CW generator / DAC?

No, but you have a 240MHz processor at your disposal; there's very little stopping you from generating the waveform yourself.
by ESP_Sprite
Thu Feb 21, 2019 8:54 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 290
Views: 58065

Re: What would you like to see in The Next Chip?

...four slave devices? Can I ask what your use case is? I think there aren't a lot of projects that even need two slave devices.
by ESP_Sprite
Wed Feb 20, 2019 3:00 am
Forum: Hardware
Topic: RAM & Flash cache efficiency
Replies: 3
Views: 153

Re: RAM & Flash cache efficiency

No, a chunk is a chunk and the ESP32 cache does not do pre-fetching, so randomly accessing aligned 32-byte chunks is as fast as accessing them linearily. (Note that our cache designs have been improved in the meanwhile; this may not be true anymore for any chips we'll be releasing in the future.)
by ESP_Sprite
Tue Feb 19, 2019 3:14 am
Forum: ESP32 IDF
Topic: overwrite weak function not working always
Replies: 9
Views: 302

Re: overwrite weak function not working always

It's under Component config -> ESP32-specific -> Panic handler behaviour.
by ESP_Sprite
Tue Feb 19, 2019 3:13 am
Forum: ESP32 IDF
Topic: ESP32 dual cores application
Replies: 1
Views: 95

Re: ESP32 dual cores application

Yes, you can, but I don't think it may actually be necessary. Start reading up on FreeRTOS queues, and instead of setting a flag, dump your data in a queue (or into an ESP-IDF ringbuffer; it may be a bit more efficient). Chances are that the queue already can buffer enough for your printf to finish ...
by ESP_Sprite
Tue Feb 19, 2019 3:11 am
Forum: ESP32 IDF
Topic: Exception was unhandled
Replies: 2
Views: 94

Re: Exception was unhandled

Hard to say without context, possibly a memory corruption issue.

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