From d104f3b2dad7c315cebb9dc6e8eaeddcb209dafe Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Sat, 28 May 2011 00:16:12 -0400 Subject: Docs: Simplify and clarify usart.rst. Make the language a little friendlier, say the words "serial port", and let them know that baud rate is a speed. --- source/usart.rst | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/source/usart.rst b/source/usart.rst index 8766e3f..e65821d 100644 --- a/source/usart.rst +++ b/source/usart.rst @@ -3,19 +3,25 @@ USART ===== +A USART is more commonly known a *serial port*. It's used to transmit +information between Maple and another device (like your computer, +another Maple, etc.). + .. contents:: Contents :local: Hardware/Circuit Design ----------------------- +.. TODO [0.0.12] Add some more information here (like how you should +.. connect TX_a to RX_b and RX_a to TX_b). + .. TODO [0.0.12/Maple Native] UART4 and UART5, Native links Each LeafLabs board has at least 3 separate USART devices. In the most simple use case, the RX and TX pins are used to send data at a -predetermined baud rate with the line voltage level relative to -ground. Their usage is documented in the :ref:`Serial Ports -` language reference page. +predetermined speed (or *baud rate*). Their usage is documented in +the :ref:`Serial Ports ` language reference page. Which pins correspond to the USART TX and RX pins are given on your board's silkscreen, and also in the board-specific USART pin maps -- cgit v1.2.3