UART » History » Revision 42
Revision 41 (Denis 'GNUtoo' Carikli, 01/14/2020 04:30 PM) → Revision 42/93 (Denis 'GNUtoo' Carikli, 01/14/2020 04:30 PM)
h1. UART There is an in-depth article covering several Samsung devices in the [[SamsungSerial]] page h2. Settings |_. Device and documentation |_. I/O voltage |_. ID<->GND |_. SOC TX |_. SOC RX |_. switch |_. stock bootloader settings |_. Comments | | I9300 |/2. 1.8V[1] |/4. 619 kOhms[3] |/4. D- |/4. D+ |/4. MAX77693[5] |/4. * speed: 115200 * pressing the volume-down button during boot increase verbosity |/2. It gives a shell once Replicant 6 has booted | | I9305 | | N7100 | ? | | | N7105 | ? | | | [[GalaxyNexusI9250SerialConsole|Galaxy Nexus]] | | 619 kOhms[4] | | | | | | | [[NexusSI902xSerial|Nexus S]] | | 150 kOhm | | | FSA9480 | | | | [[OptimusBlackSerial|Optimus Black]] | 1.8V[6] | N/A[2] | | | DP3T | | | | ODROID-U3, console UART | 1.8V |\4. "connector":https://wiki.odroid.com/accessory/development/usb_uart_kit#odroid_port_description_of_uart_connector | ttySAC1, 115200 8N1 | | | ODROID-U3, IO pins UART | 1.8V |\4. "connector":https://wiki.odroid.com/old_product/odroid-x_u_q/odroid_u3/u3_ioport_uart | ttySAC0, 115200 8N1 | | fn1. Measured between USB GND and USB VCC fn2. Code is required to use the switch as you need to configure both the MUIC and DP3T switch fn3. See "The related driver source code":https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/max77693-muic.c#n102 fn4. See the "postmarketOS wiki page on Serial debugging":https://wiki.postmarketos.org/wiki/Serial_debugging fn5. See the "driver":https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/max77693-muic.c and the "ifixit teardown":https://www.ifixit.com/Teardown/Samsung+Galaxy+S+III+Teardown/9391 fn6. Reference: [[OptimusBlackSerial]] h2. Interesting links * There is a "page on Serial debugging":https://wiki.postmarketos.org/wiki/Serial_debugging on the postmarketOS wiki that contains information for using the serial port for many smartphones models. * "mv-uart":https://osmocom.org/projects/mv-uart/wiki A serial port adapter with configurable voltages (and GPIOs)