Search found 15 matches
- Thu Oct 03, 2024 5:37 am
- Forum: General Discussion
- Topic: ESP32 Board for High-Speed Stepper Motor Control
- Replies: 2
- Views: 931
Re: ESP32 Board for High-Speed Stepper Motor Control
As mentioned, use a hardeware peripheral to generate the step pulses: https://docs.espressif.com/projects/esp-idf/en/v5.3.1/esp32/api-reference/peripherals/mcpwm.html Also use a stepper driver board such as A4988 (cheap) or DRV8825 (more features) for fancy functionality such as micro stepping and c...
- Sat Aug 24, 2024 6:35 am
- Forum: General Discussion
- Topic: xtensa calling convention: arguments pre-extended, post-extended, or both?
- Replies: 1
- Views: 934
Re: xtensa calling convention: arguments pre-extended, post-extended, or both?
In the ISA summary for LX architectures, there is a section (10.1.4 Argument passing) that states: All arguments consist of an integral number of 4-byte words. Thus, the minimum argument size is one word. Integer values smaller than a word (that is, char and short) are stored in the least significan...
- Mon Apr 15, 2024 6:07 am
- Forum: General Discussion
- Topic: Connection timed out when trying to debug.
- Replies: 5
- Views: 6304
Re: Connection timed out when trying to debug.
To see more debug information add -d to the openocd command line. Hopefully the cause will be revealed in the more information dense output.
- Mon Apr 15, 2024 5:56 am
- Forum: General Discussion
- Topic: Servo stops working and works again after 15 minutes of trying.
- Replies: 2
- Views: 733
Re: Servo stops working and works again after 15 minutes of trying.
Just a guess - is an I2C bus error causing a stall in communication? Are you tracking the status of each I2C call? Does the problem persist after a power cycle to all components (since this will clear the I2C state of all I2C components)? Do you ensure that the I2C communication between the two devi...
- Wed Feb 28, 2024 5:29 am
- Forum: General Discussion
- Topic: ESP32-Serial Port 2 + RX320/321 communications issue
- Replies: 1
- Views: 746
Re: ESP32-Serial Port 2 + RX320/321 communications issue
Can you trace TX & RX signals at the Esp32 when the radio is switched on? There may be stray noise that interferes with the reception of the serial data. At this low baud rate you don't need a fancy scope.
- Sun Jan 28, 2024 3:19 pm
- Forum: General Discussion
- Topic: Padding Bytes between Instructions in Disassembly
- Replies: 2
- Views: 1184
Re: Padding Bytes between Instructions in Disassembly
As a side note: the differences in generated assembly between the two tools are due in part to different scanning algorithms. See e.g. this StackExchange discussion: https://reverseengineering.stackexchange.com/a/2581
- Sun Jan 28, 2024 1:57 pm
- Forum: General Discussion
- Topic: Using 2 ESP32 simultainly in CPU
- Replies: 1
- Views: 805
- Sun Apr 16, 2023 5:18 am
- Forum: General Discussion
- Topic: v5.1 official release date
- Replies: 3
- Views: 2718
Re: v5.1 official release date
The 5.1 development branch was created in August 2022. Based on previous cycles, it may take about a year to reach a release candidate, then a couple of months of testing the release candidates. So possibly October - December of 2023 would be my guess.
- Thu Feb 23, 2023 10:33 am
- Forum: General Discussion
- Topic: Accurate onboard ADC reading + WiFi // is it even possible?
- Replies: 5
- Views: 3350
Re: Accurate onboard ADC reading + WiFi // is it even possible?
Can you correctly read a fixed voltage (say from a 1.5V battery) on one of the ADC pins to verify that the ADC is correctly configured?
Are you using ADC2? Note these limitations: https://docs.espressif.com/projects/esp ... imitations
Are you using ADC2? Note these limitations: https://docs.espressif.com/projects/esp ... imitations
- Tue Sep 06, 2022 5:14 pm
- Forum: Hardware
- Topic: ESP32 Source code Debug
- Replies: 6
- Views: 3090
Re: ESP32 Source code Debug
Using an FT2232H or FT232H board is not that expensive and works quite well (FT2232H is used on the ESP-WROVER-KIT).ESP_Sprite wrote: ↑Fri Aug 26, 2022 11:23 amI imagine you mean the ESP32 DevKitC v4? That one does not have an USB-to-JTAG bridge onboard, sorry.