Difference between revisions of "UART Console"

Revision as of 19:07, 20 October 2021

UART0

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

PSTV UART0 location

OLED PSVita UART0 location

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 (procedure currently unknown) or 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.

UART5

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

OLED PSVita 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

scePervasiveUartClockEnableForDriver(port); // Turn on clock
scePervasiveUartResetDisableForDriver(port); // Out of reset
sceUartInitForKernel(port);
/*
 * Use UART port (read/write)
 * ...
 */
scePervasiveUartResetEnableForDriver(port); // Put to reset
scePervasiveUartClockDisableForDriver(port); // Turn off clock

Notes

DevKit

In DevKit units, UART is connected to the Communication Processor. Communication Processor seems to manage input/output from sdio (mini-USB) at regular intervals.

@@ Line 1: / Line 1: @@
-The UART0 is a debugging console. The logic level is 1.8V.
+== UART0 ==
+The UART0 is a debugging console used by ARM, cMep and Syscon. The logic level is 1.8V.
+=== PSTV UART0 location ===
-== PlayStation TV UART0 location ==
 [[File:Pstv_uart0.png]]
-== OLED Vita UART0 location ==
+=== OLED PSVita UART0 location ===
 [[File:vita-1000-uart.png|600px]]
-Two ways of using UART0. First is to solder directly to the testpads near the PMIC (yellow and cyan points). The 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 the syscon to select the Kermit UART (procedure currently unknown) or manually flip the switch (green point to 1.8V).
+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 (procedure currently unknown) 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.
-== OLED Vita UART5 location ==
+== UART5 ==
+The UART5 is a debugging console used for the 3G modem on PS Vita models that have it.
+=== OLED PSVita UART5 location ===
-It is on the PCI-E connector pins 8,10,12,14 is RFR, CTS, TX, RX. On Wifi 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).
+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 ==
-== UART Initialization ==
 <source lang="c">
-kscePervasiveUartClockEnable(uart_bus); // Turn on clock
+scePervasiveUartClockEnableForDriver(port); // Turn on clock
-kscePervasiveUartResetDisable(uart_bus); // Out of reset
+scePervasiveUartResetDisableForDriver(port); // Out of reset
-ksceUartInit(uart_bus);
+sceUartInitForKernel(port);
 /*
-  * Use UART bus
+  * Use UART port (read/write)
   * ...
   */
-kscePervasiveUartResetEnable(uart_bus); // Put to reset
+scePervasiveUartResetEnableForDriver(port); // Put to reset
-kscePervasiveUartClockDisable(uart_bus); // Turn off clock
+scePervasiveUartClockDisableForDriver(port); // Turn off clock
 </source>
+== Notes ==
+=== DevKit ===
+In DevKit units, UART is connected to the Communication Processor. Communication Processor seems to manage input/output from sdio (mini-USB) at regular intervals.