Is this library usable already?

[Alissonsz]

Sorry for opening an issue to ask that, didn't find another way to get in touch :(
Is it already usable? I'm trying to use madflight and I want to use DSHOT for my esc, so I'm adding this to madflight, but then wondered if I should be doing it since I see looks like no one is using it yet.

[ZupLuis]

Well, it's not working anymore, it says "legacy RMT driver is deprecated"

[qqqlab]

@ZupLuis thanks for reporting this. What setup are you using?

Tested on ESP32 with Adruino-ESP32 v2.0.14 (ESP-IDF v4.4). Not tested on other ESP32-XX variants, which probably need adaption of the code because of different RMT hardware.

[ZupLuis]

Tested on ESP32 with Adruino-ESP32 v2.0.14 (ESP-IDF v4.4). Not tested on other ESP32-XX variants, which probably need adaption of the code because of different RMT hardware.
I'm using ESP32C3, connected to GPIO_PIN_0, using a LittleBee 20A ESC, which has BLheli-s firmware and supports Dshot, at this point of my project i'm just testing the motors, so my code is very simple. This is the error message I get:

In file included from c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main/ESP32_DSHOT.h:31,
                 from C:\Users\luigi\AppData\Local\Temp\.arduinoIDE-unsaved2025712-2896-1b4yfex.ybas\sketch_aug12a\sketch_aug12a.ino:31:
C:\Users\luigi\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.4-2f7dcd86-v1\esp32c3/include/driver/deprecated/driver/rmt.h:18:2: warning: #warning "The legacy RMT driver is deprecated, please use driver/rmt_tx.h and/or driver/rmt_rx.h" [-Wcpp]
   18 | #warning "The legacy RMT driver is deprecated, please use driver/rmt_tx.h and/or driver/rmt_rx.h"
      |  ^~~~~~~
In file included from c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.h:31,
                 from c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:31:
C:\Users\luigi\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.4-2f7dcd86-v1\esp32c3/include/driver/deprecated/driver/rmt.h:18:2: warning: #warning "The legacy RMT driver is deprecated, please use driver/rmt_tx.h and/or driver/rmt_rx.h" [-Wcpp]
   18 | #warning "The legacy RMT driver is deprecated, please use driver/rmt_tx.h and/or driver/rmt_rx.h"
      |  ^~~~~~~
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp: In member function 'void DSHOT::rm_rx_end_handler()':
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:414:45: error: cannot convert 'rmt_mem_owner_t' to 'rmt_ll_mem_owner_t'
  414 |   rmt_ll_rx_set_mem_owner(&RMT, rx_channel, RMT_MEM_OWNER_TX);
      |                                             ^~~~~~~~~~~~~~~~
      |                                             |
      |                                             rmt_mem_owner_t
In file included from c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:39:
C:\Users\luigi\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.4-2f7dcd86-v1\esp32c3/include/hal/esp32c3/include/hal/rmt_ll.h:552:97: note:   initializing argument 3 of 'void rmt_ll_rx_set_mem_owner(rmt_dev_t*, uint32_t, rmt_ll_mem_owner_t)'
  552 | static inline void rmt_ll_rx_set_mem_owner(rmt_dev_t *dev, uint32_t channel, rmt_ll_mem_owner_t owner)
      |                                                                              ~~~~~~~~~~~~~~~~~~~^~~~~
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:416:10: error: 'RMTMEM' was not declared in this scope
  416 |   item = RMTMEM.chan[RMT_ENCODE_RX_CHANNEL(rx_channel)].data32;
      |          ^~~~~~
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:469:45: error: cannot convert 'rmt_mem_owner_t' to 'rmt_ll_mem_owner_t'
  469 |   rmt_ll_rx_set_mem_owner(&RMT, rx_channel, RMT_MEM_OWNER_RX);
      |                                             ^~~~~~~~~~~~~~~~
      |                                             |
      |                                             rmt_mem_owner_t
C:\Users\luigi\AppData\Local\Arduino15\packages\esp32\tools\esp32-arduino-libs\idf-release_v5.4-2f7dcd86-v1\esp32c3/include/hal/esp32c3/include/hal/rmt_ll.h:552:97: note:   initializing argument 3 of 'void rmt_ll_rx_set_mem_owner(rmt_dev_t*, uint32_t, rmt_ll_mem_owner_t)'
  552 | static inline void rmt_ll_rx_set_mem_owner(rmt_dev_t *dev, uint32_t channel, rmt_ll_mem_owner_t owner)
      |                                                                              ~~~~~~~~~~~~~~~~~~~^~~~~
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp: At global scope:
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:474:41: warning: ignoring attribute 'section (".iram1.5")' because it conflicts with previous 'section (".iram1.0")' [-Wattributes]
  474 | IRAM_ATTR void rmt_isr_handler(void* arg){
      |                                         ^
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:44:16: note: previous declaration here
   44 | void IRAM_ATTR rmt_isr_handler(void* arg);
      |                ^~~~~~~~~~~~~~~
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp: In function 'void rmt_isr_handler(void*)':
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:482:7: error: 'rmt_ll_clear_tx_end_interrupt' was not declared in this scope; did you mean 'rmt_ll_enable_interrupt'?
  482 |       rmt_ll_clear_tx_end_interrupt(&RMT, ch);
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |       rmt_ll_enable_interrupt
c:\Users\luigi\OneDrive\Documents\Arduino\libraries\ESP32_DSHOT-main\ESP32_DSHOT.cpp:491:7: error: 'rmt_ll_clear_rx_end_interrupt' was not declared in this scope; did you mean 'rmt_ll_enable_interrupt'?
  491 |       rmt_ll_clear_rx_end_interrupt(&RMT, ch);
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |       rmt_ll_enable_interrupt

exit status 1

Compilation error: exit status 1

[qqqlab]

@ZupLuis

As mentioned: the code works for Arduino v2, you're probably using v3. The underlying ESP-IDF has many breaking changes with each new release...

So, you either have to downgrade to v2, or make changes.

Then it might work, but probably more changes needed for your C3 chip...