RE: CDC ACM USBD Binary / Raw Data Mode

BAW — Fri, 07 Feb 2025 16:21:32 GMT

Thank you for the response. I will take a look.

RE: CDC ACM USBD Binary / Raw Data Mode

Susheel Nuguru — Fri, 07 Feb 2025 12:07:20 GMT

Hi Brent,

Assuming you are using nrf5SDKv17.1.0, The usb driver/library in itself is not doing any conversion from binary/ASCII in itself. But there are some instances in the application where we are logging or sending data in ASCII.

For example in APP_USBD_CDC_ACM_USER_EVT_RX_DONE event, we have

NRF_LOG_INFO("RX: size: %lu char: %c", size, m_rx_buffer[0]);

This just logs to serial output and does not affect the USB data.

But we also have

size_t size = sprintf(m_tx_buffer, "Hello USB CDC FA demo: %u\r\n", frame_counter);

Which is actual data transmitted which is actually formulated to ASCII.

If you want to deal with raw data, then you just need to print/log or formulate such things in raw data formats like using NRF_LOG_HEXDUMP_INFO to print. or not using ascii conversions in sprintf