Date: Tue, 14 Jan 2025 14:41:50 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 284042] FTDI: UART breaks JTAG Message-ID: <bug-284042-19105-0m7ZtSIB9C@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-284042-19105@https.bugs.freebsd.org/bugzilla/> References: <bug-284042-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D284042 --- Comment #5 from Tomasz "CeDeROM" CEDRO <tomek@cedro.info> --- Cool, so you made JTAG part skip on you interface too, how? Did you modify a driver or used devd? :-) There were closed source drivers (libftd2xx?) that had better performance b= ack then and some additional features over open-source libusb/libftdi back then= . It would be good to know if simultaneous operations of JTAG and UART are possi= ble even if on other platforms with closed source drivers so we have a reference point and know this is not a chip limitation. I remember around 13 release I had to play with stty to make things work wi= th ESP32 over serial port as esptool uses those control lines for bootloader selection and reset during flashing.. maybe ucom is buggy or had some defau= lts changed that cause the problem? Can you try to play with control lines configurations to rule out ucom bug? Regarding BlackMagic Probe I asked about RISC-V support and it was close.. = but I did not buy the probe and did not play with it yet.. maybe it is here already? Should I buy it is it worth it? https://github.com/blackmagic-debug/blackmagic/discussions/1751 Regarding ESP USB-Serial-JTAG I was thinking not only about using the on-ch= ip silicon, but to use ESP32-C3's USB-Serial-JTAG peripheral then re-route JTAG signals to GPIO and make it work as debug probe for other external chips.. = plus NuttX RTOS we could make it a debug probe with WiFi and BLE connectivity :-) https://nuttx.apache.org/docs/latest/platforms/risc-v/esp32c3/index.html --=20 You are receiving this mail because: You are the assignee for the bug.=
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