UART Console: Difference between revisions

From Vita Development Wiki
Jump to navigation Jump to search
No edit summary
Line 13: Line 13:
There are two ways of using UART0:
There are two ways of using UART0:
* First way is to solder directly to the testpads near the PMIC (yellow and cyan points).
* First way is to solder directly to the testpads near the PMIC (yellow and cyan points).
 
* Second way is through the multi-connector or the testpads above it (blue and red points). To use the multi-connector points though, you need either to tell Syscon to select [[Kermit]] UART by calling <code>[[SceSyscon#sceSysconSetMultiCnPortForDriver]](1);</code>, or to manually flip the switch (green point to 1.8V).
* Second way is through the multi-connector or the testpads above it (blue and red points). To use the multi-connector points though, Run <code>sceSysconSetMultiCnPortForDriver(1);</code> <s>you need either to tell Syscon to select [[Kermit]] UART (procedure currently unknown)</s> or manually flip the switch (green point to 1.8V).


The switch is controlled by a [http://www.ti.com/lit/ds/symlink/ts3a5018.pdf TS3A5018] chip and the RTS gate is a [http://toshiba.semicon-storage.com/ap-en/product/logic/one-gate-logic/detail.TC7WG126FK.html TC7WG126FK] chip.
The switch is controlled by a [http://www.ti.com/lit/ds/symlink/ts3a5018.pdf TS3A5018] chip and the RTS gate is a [http://toshiba.semicon-storage.com/ap-en/product/logic/one-gate-logic/detail.TC7WG126FK.html TC7WG126FK] chip.
Line 20: Line 19:
== UART1 ==
== UART1 ==


The UART1 is a debugging console used by DevKit PS Vita models.
UART1 is a debugging console used by DevKit PS Vita models.


UART1 is pre-initialized by SKBL.
UART1 is pre-initialized by [[SKBL]].


=== DevKit PS Vita UART1 location ===
=== DevKit PS Vita UART1 location ===

Revision as of 21:41, 11 September 2022

UART0

The UART0 is a debugging console used by ARM, cMep and Syscon. The logic level is 1.8V.

PSTV UART0 location

Pstv uart0.png

OLED PS Vita UART0 location

Vita-1000-uart.png

There are two ways of using UART0:

  • First way is to solder directly to the testpads near the PMIC (yellow and cyan points).
  • Second way is through the multi-connector or the testpads above it (blue and red points). To use the multi-connector points though, you need either to tell Syscon to select Kermit UART by calling SceSyscon#sceSysconSetMultiCnPortForDriver(1);, or to manually flip the switch (green point to 1.8V).

The switch is controlled by a TS3A5018 chip and the RTS gate is a TC7WG126FK chip.

UART1

UART1 is a debugging console used by DevKit PS Vita models.

UART1 is pre-initialized by SKBL.

DevKit PS Vita UART1 location

Unknown but guessed to be sent to GCP board (Communication Processor). Communication Processor sends received UART1 data over mini-USB which can be seen on PC in the Console Output for PS Vita program. Communication Processor seems to manage input/output from sdio (mini-USB) at regular intervals.

UART5

The UART5 is a debugging console used for the 3G modem on PS Vita models that have it.

OLED PS Vita UART5 location

It is on the PCI-E connector pins 8,10,12,14 is RFR, CTS, TX, RX.

  • On 3G PS Vita units, you can solder to the PCI-E connectors or install yifan lu's PSVSD board.
  • On Wifi PS Vita units, you need to fill in the 88ohm termination resistors (or just short the pads) and some way to enable it (not known yet).

UART initialization/deinitialization code

scePervasiveUartClkGateEnableForDriver(port); // Turn on clock
scePervasiveUartResetDisableForDriver(port); // Put out of reset
sceKernelUartInitForKernel(port);
/*
 * Use UART port (read/write)
 * ...
 */
scePervasiveUartResetEnableForDriver(port); // Put to reset
scePervasiveUartClkGateDisableForDriver(port); // Turn off clock