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by WiFive
Wed Oct 17, 2018 12:12 am
Forum: General Discussion
Topic: Guru Meditation Error: Cache disabled but cached memory region accessed
Replies: 3
Views: 89

Re: Guru Meditation Error: Cache disabled but cached memory region accessed

What is the code at

Code: Select all

spi_intr at C:/msys32/home/user/esp/esp-idf/components/driver/spi_master.c:432
and what is your esp-idf version?
by WiFive
Tue Oct 16, 2018 8:50 am
Forum: ESP32 IDF
Topic: Need help regarding pcnt interface example into ESP32
Replies: 7
Views: 116

Re: Need help regarding pcnt interface example into ESP32

If you read the linked thread ESP_Sprite suggested RMT or MCPWM Capture. Since mcpwm has only 6 capture channels you probably should use RMT.
by WiFive
Tue Oct 16, 2018 5:21 am
Forum: ESP32 IDF
Topic: Need help regarding pcnt interface example into ESP32
Replies: 7
Views: 116

Re: Need help regarding pcnt interface example into ESP32

PCNT is for counting pulses not measuring pulses
by WiFive
Tue Oct 16, 2018 1:43 am
Forum: General Discussion
Topic: Security Advantage of Limiting Serial Updates for Flash Encryption
Replies: 2
Views: 75

Re: Security Advantage of Limiting Serial Updates for Flash Encryption

If you can upload plaintext and it ends up encrypted in flash then you can potentially use that to weaken or defeat the encryption and you can emulate the flash chip to make this easier. Actually you could probably also use a timing attack to defeat secure boot and run a malicious firmware (because ...
by WiFive
Mon Oct 15, 2018 7:59 am
Forum: ESP32 IDF
Topic: strings in queue
Replies: 9
Views: 115

Re: strings in queue

How would you know whether it is full if you don't check return code of xQueueSend

If you send 3 items for every 1 receive then it should be full after 150