![]() ![]() Intf.txPI, intf.txCI, intf.rxPI, intf.rxCI, intf.txqoffset, intf.rxqoffset, intf.txqlogsz, intf. Log(" txPI: %d, txCI: %d, rxPI: %d, rxCI: %d, txqoffset: %d, rxqoffset: %d, txlogsz: %d, rxlogsz: %d", dmesg confirms both buffers are all-zero Log(": %s", reinterpret_cast(ivars->rx_buf)) Void *dest = reinterpret_cast(ivars->rx_buf + intf.rxPI) Void *src = reinterpret_cast(ivars->tx_buf + intf.txCI) ![]() Size_t tx_buf_sz = intf.txPI - intf.txCI Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. IMPL(VirtualSerialPortDriver, TxDataAvailable) Enable snaps on Raspberry Pi and install cool-retro-term. ![]() Ivars->interface = reinterpret_cast(ioaddrseg.address) Ivars->ifmd->GetAddressRange(&ioaddrseg) COM Port with a serial terminal emulation program like TeraTerm, Putty or CoolTerm. Ret = ConnectQueues(&ivars->ifmd, &rxq_, &txq_, ivars->rxq, ivars->txq, 0, 0, 11, 11) Arduino Ble LibraryThe NINA-B3 datasheet page 10 is quite clear. IMPL(VirtualSerialPortDriver, HwDeactivate) This drag-to-delete method works in all versions of Mac OS X. Right click the Trash icon and select Empty Trash option to start the uninstall. Drag CoolTerm 1.4.5.3.242 to the Trash (or right click on it and then select Move to Trash option). Ret = SetModemStatus(ivars->rts, ivars->dtr, false, ivars->dtr) Open up the Finder, click Applications on the left side, and then select CoolTerm 1.4.5.3.242. Loopback, set CTS to RTS, set DSR and DCD to DTR IMPL(VirtualSerialPortDriver, HwActivate) Ret = ivars->txq->Create(kIOMemoryDirectionInOut, bufferSize, 0, &ivars->txq) Ret = ivars->rxq->Create(kIOMemoryDirectionInOut, bufferSize, 0, &ivars->rxq) Ivars = IONewZero(VirtualSerialPortDriver_IVars, 1) IOBufferMemoryDescriptor *ifmd, *rxq, *txq Using SerialPortInterface = driverkit::serial::SerialPortInterface Really appreciate it if anyone could point out how should I fix it, many thanks! So I think I must be doing something wrong somewhere. I call RxDataAvailable(), but nothing appears on picocom, and RxFreeSpaceAvailable() never gets called back. Secondly, I couldn't figure out how to notify the system that there are data available for sending back to picocom. The problems are however, firstly, when TxDataAvailable() is called, the TX buffer is all-zero so although the driver knows there is some incoming data received from picocom, it cannot actually see the data in neither Tx/Rx buffers. And I see TxDataAvailable() gets called every time I type a character in picocom. Heres the regular steps to uninstall CoolTerm 1.5. When the driver gets loaded, I can see sth like tty.serial-1000008DD in /dev and I can use picocom to do I/O on the virtual serial port. In most circumstances you can take the drag-and-drop way to delete CoolTerm 1.5.0.3.572 from your computer. I think the best way to do that is to subclass IOUserSerial? Based on the available docs on this class (), I've done the basic implementation below. I'm trying to implement a virtual serial port driver for my ham radio projects which require emulating some serial port devices and I need to have a "backend" to translate the commands received by the virtual serial port into some network-based communications. ![]()
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