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Re: ESP32 UART-USB Brige How to use
Posted: Mon Mar 23, 2026 8:41 am
by stefan.erni
Hi Martin
My testprogram:
You can find a description of the hardware here
viewtopic.php?t=3644
Re: ESP32 UART-USB Brige How to use
Posted: Mon Mar 23, 2026 10:45 am
by stefan.erni
Hi Martin
One a question:
There is still one entry missing :
CONFIG_USB_DEVICE_ENABLED=y
CONFIG_TINYUSB_ENABLED=y
CONFIG_TINYUSB_DEVICE_ENABLED=y
CONFIG_TINYUSB_CDC_ENABLED=y
in the file:
sdkconfig.defaults.esp32s3
But in FC11 there are so many sdkconfig.defaults.esp32s3.
Which one is the right one?
Re: ESP32 UART-USB Brige How to use
Posted: Mon Mar 30, 2026 10:55 am
by stefan.erni
Hi Martin
I've now updated to 5.3.1 and added the USB Tiny dependency.
I also have some C code there can I use it in Flowcode?
include are ok:
Code: Select all
#include "tinyusb.h"
#include "tusb_cdc_acm.h"
#include "esp_log.h"
- 2026-03-30_11-36-59.PNG (39.99 KiB) Viewed 48 times
C-Code for USB:
Code: Select all
void app_main(void)
{
// TinyUSB Basisconfig
tinyusb_config_t tusb_cfg = {
.device_descriptor = NULL,
.string_descriptor = NULL,
.external_phy = false // intern USB-PHY des ESP32-S3
};
// USB-Device (TinyUSB) start
tinyusb_driver_install(&tusb_cfg);
// USB-CDC (virtueller COM-Port) config
tinyusb_cdcacm_config_t cdc_cfg = {
.usb_dev = TINYUSB_USBDEV_0,
.cdc_port = TINYUSB_CDC_ACM_0,
.rx_unread_size = 64,
};
tusb_cdc_acm_init(&cdc_cfg);
// wait, for USB clean
vTaskDelay(pdMS_TO_TICKS(300));
// „Hello world“ send
const char *msg = "Hello world\r\n";
tusb_cdc_acm_write(TINYUSB_CDC_ACM_0, (uint8_t *)msg, strlen(msg));
tusb_cdc_acm_write_flush(TINYUSB_CDC_ACM_0, 0);
// (Flowcode need main loop)
while (1)
{
vTaskDelay(pdMS_TO_TICKS(1000));
}
}
Re: ESP32 UART-USB Brige How to use
Posted: Mon Mar 30, 2026 11:06 am
by mnfisher
Hi Stefan,
Yes - you can use the C to initialise - rename (app_main) initialise (or some such) and add a function definition to the 'includes' (top) box of supplementary code... ( void initialise(void); ) Remove the loop (and the 'hello world'?) from the end of the function...
Then call initialise(); from a C block.
You can also add a 'Print(char *str);' function - which could call tusb_cdc_acm_write and flush..
Martin
Re: ESP32 UART-USB Brige How to use
Posted: Mon Mar 30, 2026 1:03 pm
by stefan.erni
Hi Martin
Thank you Martin I'll give that a try.
I've had a bit of success with `print_F` so far.
I still have no idea how to send an array
Very short program:
C-Code:
- 2026-03-30_13-51-31.PNG (15.24 KiB) Viewed 35 times
On computer (regardless of the baud rate)
- 2026-03-30_13-51-07.PNG (112.9 KiB) Viewed 35 times