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SAMA5D4: Fix some memory remapping issues; updates to comments and README files

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This commit is contained in:
Gregory Nutt 2014-06-14 08:02:58 -06:00
parent 74a4151945
commit 24249ed6ab
1 changed files with 13 additions and 7 deletions
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20
configs/sama5d4-ek/README.txt
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@ -872,9 +872,11 @@ Buttons and LEDs
Serial Console Serial Console
============== ==============
Two UARTs are available: Two UART ports are available:
Virtual COM / DBGU Port (J24). Either may be driven by USART3, depending
upon the setting of JP19 and JP20:
USART3 Virtual Com
------------------------------ ------------------- ------------------------- ------------------------------ ------------------- -------------------------
SAMA5D4 PIO SIGNAL USAGE SAMA5D4 PIO SIGNAL USAGE
------------------------------ ------------------- ------------------------- ------------------------------ ------------------- -------------------------
@ -882,8 +884,12 @@ Serial Console
PE17/A17/TXD3/TCLK0 DBGU_TXD3_PE17 DBGU_TXD3 (See JP20) PE17/A17/TXD3/TCLK0 DBGU_TXD3_PE17 DBGU_TXD3 (See JP20)
------------------------------ ------------------- ------------------------- ------------------------------ ------------------- -------------------------
Connects to the SAM3U which will, in turn, provide the serial output on a In one jumper position UART3 connects to the SAM3U which will, in turn,
virual COM port. JP19 and JP20 can disconnect USART3 from the SAM3U. 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).
I personally prefer the RS-2323 port because my terminal software does not
lose the USB Virtual COM everytime I reset or power-cycle the board.
USART4 TTL-Level USART4 TTL-Level
------------------------------ ------------------- ------------------------- ------------------------------ ------------------- -------------------------
@ -900,9 +906,9 @@ Serial Console
- VCC_3V3 is also available at Expansion Interface, J19B pins 21 and 22 - 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 - GND is available J19A pin 11, J19B pin 31, and J19C pin 51
By default the DBGU/USART3 is used as the NuttX serial console in all By default the RS-232 DBGU port on USART3 is used as the NuttX serial
configurations (unless otherwise noted). USART4, however, is the more console in all configurations (unless otherwise noted). USART4, however,
convenient USART to use during board bring-up. is the also available.
Networking Networking
========== ==========