68688e0ec4
The M4 previously buffered 16K of zeroes for the M0 to transmit, whilst waiting for the first USB bulk transfer from the host to complete. The first bulk transfer was placed in the second 16K buffer. This avoided the M0 transmitting uninitialised data, but was not a reliable solution, and delayed the transmission of the first host-supplied samples. Now that the M0 is placed in TX_START mode, this trick is no longer necessary, because the M0 can automatically send zeroes until the first bulk transfer is completed. As such, the first bulk transfer now goes to the first 16K buffer. Once the M4 byte count is increased by the bulk transfer completion callback, the M0 will start transmitting the samples immediately.
HackRF
This repository contains hardware designs and software for HackRF, a low cost, open source Software Defined Radio platform.
(photo by fd0 from https://github.com/fd0/hackrf-one-pictures)
principal author: Michael Ossmann mike@ossmann.com
Information on HackRF and purchasing HackRF: https://greatscottgadgets.com/hackrf/
Documentation
Documentation for HackRF can be viewed on Read the Docs. The raw documenation files for HackRF are in the docs folder in this repository and can be built locally by installing Sphinx Docs and running make html. Documentation changes can be submitted through pull request and suggestions can be made as GitHub issues.
Getting Help
Before asking for help with HackRF, check to see if your question is listed in the FAQ.
For assistance with HackRF general use or development, please look at the issues on the GitHub project. This is the preferred place to ask questions so that others may locate the answer to your question in the future.
We invite you to join our community discussions on Discord. Note that while technical support requests are welcome here, we do not have support staff on duty at all times. Be sure to also submit an issue on GitHub if you've found a bug or if you want to ensure that your request will be tracked and not overlooked.
If you wish to see past discussions and questions about HackRF, you may also view the mailing list archives.
GitHub issues on this repository that are labelled "technical support" by Great Scott Gadgets employees can expect a response time of two weeks. We currently do not have expected response times for other GitHub issues or pull requests for this repository.