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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-06-14 08:02:58 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-06-14 08:02:58 -0600 |
| commit | 46010548312e5b678f1fc00559bfceefe6b5944e (patch) | |
| tree | 579c8fe68dc9978ddadfba66402747cb7e984eac /nuttx/configs/sama5d4-ek/README.txt | |
| parent | 5544b6b361f5129ce0e3beab0b591ee6e2443427 (diff) | |
| download | px4-nuttx-46010548312e5b678f1fc00559bfceefe6b5944e.tar.gz px4-nuttx-46010548312e5b678f1fc00559bfceefe6b5944e.tar.bz2 px4-nuttx-46010548312e5b678f1fc00559bfceefe6b5944e.zip | |
SAMA5D4: Fix some memory remapping issues; updates to comments and README files
Diffstat (limited to 'nuttx/configs/sama5d4-ek/README.txt')
| -rw-r--r-- | nuttx/configs/sama5d4-ek/README.txt | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/nuttx/configs/sama5d4-ek/README.txt b/nuttx/configs/sama5d4-ek/README.txt index 08364da17..360576ae4 100644 --- a/nuttx/configs/sama5d4-ek/README.txt +++ b/nuttx/configs/sama5d4-ek/README.txt @@ -872,9 +872,11 @@ Buttons and LEDs 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 ------------------------------ ------------------- ------------------------- @@ -882,8 +884,12 @@ Serial Console 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 - virual COM port. JP19 and JP20 can disconnect USART3 from the SAM3U. + 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). + + 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 ------------------------------ ------------------- ------------------------- @@ -900,9 +906,9 @@ Serial Console - 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 - By default the DBGU/USART3 is used as the NuttX serial console in all - configurations (unless otherwise noted). USART4, however, is the more - convenient USART to use during board bring-up. + 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. Networking ========== |