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Update SAMA5D2 README

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This commit is contained in:
Gregory Nutt
2015-09-10 07:25:48 -06:00
parent 5c144f704f
commit c74b86c45e
1 changed files with 46 additions and 29 deletions
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configs/sama5d2-xult/README.txt
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@@ -646,43 +646,60 @@ Buttons and LEDs
Serial Console
==============
Two UART ports are available:
Virtual COM / DBGU Port. Either may be driven by USART3, depending
upon the setting of JP2 (DBGU_PE):
Virtual COM / DBGU Port (J24). Either may be driven by USART3, depending
upon the setting of JP19 and JP20:
------------ -------------- --------
SAMA5D2 BOARD SIGNAL USAGE
PIO FUNCTION NAME FUNCTION
------------ -------------- --------
PD3 UTXD1 DBGU_UTXD1_PD3 DBGU_RXD
PD2 URXD1 DBGU_URXD1_PD2 DBGU_TXD
------------ -------------- --------
------------------------------ ------------------- -------------------------
SAMA5D2 PIO SIGNAL USAGE
------------------------------ ------------------- -------------------------
PE16/A16/RXD3/TIOB0 DBGU_RXD3_PE16 DBGU_RXD3 (See JP19)
PE17/A17/TXD3/TCLK0 DBGU_TXD3_PE17 DBGU_TXD3 (See JP20)
------------------------------ ------------------- -------------------------
Terminologicy: FLEXCOM is the same as USART in previous SAMA5D versions.
In one jumper position UART3 connects to the SAM3U which will, in turn,
provide the serial output over a USB virtual COM port. In other other
jumper position, UART3 will connect the RS-232 port labelled DBGU (J24).
Standard UART on Arduino connector (J21) is FLEXCOM4.
I personally prefer the RS-232 port because my terminal software does not
lose the USB Virtual COM every time I reset or power-cycle the board.
---- ------- -------------
J21 BOARD SAMA5D2
PIN NAME PIO FUNCTION
---- ------- -------------
7 F4_TXD PD12 FLEXCOM4
8 F4_RXD PD13 FLEXCOM4
---- ------- -------------
USART4 TTL-Level
------------------------------ ------------------- -------------------------
SAMA5D2 PIO SIGNAL USAGE
------------------------------ ------------------- -------------------------
PE26/NCS2/RXD4/A18 RXD4_PE26 RXD4
PE27/NWR1/NBS1/TXD4 TXD4_PE27 TXD4
------------------------------ ------------------- -------------------------
Other USARTs are available on J22:
A TTL-to-RS232 converter is required to use this USART for a serial console.
---- ------- -------------
J22 BOARD SAMA5D2
PIN NAME PIO FUNCTION
---- ------- -------------
3 F0_TXD PB28 FLEXCOM0
4 F0_RXD PB29 FLEXCOM0
5 F3_TXD PB23 FLEXCOM3
6 F3_RXD PB22 FLEXCOM3
---- ------- -------------
- RXD4/PE26 is available at Expansion Interface, J19C pin 59
- TXD4/PE27 is available at Expansion Interface, J19C pin 60
- VCC_3V3 is also available at Expansion Interface, J19B pins 21 and 22
- GND is available J19A pin 11, J19B pin 31, and J19C pin 51
UARTs available of EXT1
By default the RS-232 DBGU port on USART3 is used as the NuttX serial
console in all configurations (unless otherwise noted). USART4, however,
is the also available.
---- ------- -------------
EXT1 BOARD SAMA5D2
PIN NAME PIO FUNCTION
---- ------- -------------
13 UART_RX PA23 FLEXCOM1
14 UART_TX PA24 FLEXCOM1
---- ------- ---- --------
UARTs available of EXT2
---- ------- -------------
EXT2 BOARD SAMA5D2
PIN NAME PIO FUNCTION
---- ------- -------------
13 UART_RX PB29 FLEXCOM0
14 UART_TX PB28 FLEXCOM0
---- ------- ---- --------
SAMA5D2-XULT Configuration Options
=================================