Search found 3529 matches

by WiFive
Mon May 02, 2022 5:46 pm
Forum: ESP-IDF
Topic: Custom bootloader
Replies: 4
Views: 3939

Re: Custom bootloader

1. the bootloader has to run completely from iram and 2. many components depend on freertos features. If you can use rom functions to do what you want, it would be easier.
by WiFive
Tue Apr 26, 2022 4:59 am
Forum: Hardware
Topic: ESP32-U4WDH Single or Dual Core
Replies: 1
Views: 1361

Re: ESP32-U4WDH Single or Dual Core

The answer is right there in the footnote in the second image
by WiFive
Tue Apr 26, 2022 4:55 am
Forum: General Discussion
Topic: Usage of ESP32 chipset family for periferal alarm system
Replies: 1
Views: 1142

Re: Usage of ESP32 chipset family for periferal alarm system

You would have to wake up from deep sleep periodically to send a "heartbeat" signal to make sure device is still functioning.
by WiFive
Wed Apr 20, 2022 7:31 am
Forum: Hardware
Topic: custom board, flash problem, GPIO2 or GPIO12 preventing flashing
Replies: 3
Views: 2652

Re: custom board, flash problem, GPIO2 or GPIO12 preventing flashing

Set the efuse to avoid gpio12 problems
by WiFive
Sun Apr 17, 2022 2:01 am
Forum: General Discussion
Topic: Software or Hardware 9 Bit
Replies: 9
Views: 4073

Re: Software or Hardware 9 Bit

Uart you can use rmt or ulp
by WiFive
Fri Apr 15, 2022 5:34 pm
Forum: General Discussion
Topic: How can I build C project without FreeRTOS?
Replies: 11
Views: 6439

Re: How can I build C project without FreeRTOS?

You may want to look at the ports of zephyr, nuttx, rtthread, and aliOS.
by WiFive
Wed Apr 13, 2022 9:56 pm
Forum: Hardware
Topic: current peaks during deepsleep
Replies: 1
Views: 1621

Re: current peaks during deepsleep

The touch controller will use power during its periodic cycle. It should not happen with a button.
by WiFive
Tue Apr 12, 2022 9:40 pm
Forum: General Discussion
Topic: Need help for "Cache disabled but cached memory region accessed"
Replies: 2
Views: 1950

Re: Need help for "Cache disabled but cached memory region accessed"

the functions called in the isr have to be in iram too
by WiFive
Thu Apr 07, 2022 6:12 pm
Forum: ESP-IDF
Topic: mbedtls_calloc returns MBEDTLS_ERR_SSL_ALLOC_FAILED even when enough heap is available
Replies: 1
Views: 1847

Re: mbedtls_calloc returns MBEDTLS_ERR_SSL_ALLOC_FAILED even when enough heap is available

You have to also check for largest free block because heap might be fragmented.