From e2224b21ddbd9195bf0ca2bf940eb4478735cc30 Mon Sep 17 00:00:00 2001
From: zacharytomlinson <ztomlinson7@gmail.com>
Date: Tue, 26 Nov 2024 14:09:22 -0600
Subject: [PATCH] Change info on RS232 circuit wiki page

---
 ...Raspberry-Limitation-&-How-to-solve-it.rst | 36 +++++--------------
 1 file changed, 9 insertions(+), 27 deletions(-)

diff --git a/docs/wiki/pages/1.-Raspberry-Limitation-&-How-to-solve-it.rst b/docs/wiki/pages/1.-Raspberry-Limitation-&-How-to-solve-it.rst
index db7feae..5481a6c 100644
--- a/docs/wiki/pages/1.-Raspberry-Limitation-&-How-to-solve-it.rst
+++ b/docs/wiki/pages/1.-Raspberry-Limitation-&-How-to-solve-it.rst
@@ -2,37 +2,19 @@
 
 Raspberry Limitation & How To Solve
 ===================================
-The Raspberry present some challenges when comes to UART and Serial connections. In the specific:
-
-
-
-   The mini UART is a secondary low throughput UART intended to be used as a console. The mini Uart has the following features:
-
-       * 7 or 8 bit operation.
-       * 1 start and 1 stop bit.
-       * No parities.
-       * Break generation.
-       * 8 symbols deep FIFOs for receive and transmit.
-       * SW controlled RTS, SW readable CTS.
-       * Auto flow control with programmable FIFO level.
-       * 16550 like registers.
-       * Baudrate derived from system clock.
-
-
-As per SAS documentation, for the connection, you need:
-
-   19.2 KBaud in a "wakeup" mode. The 11-bit data packet consists of one start bit, eight data bits, a
-   ninth ‘wakeup’ bit, and one stop bit.
-
-
-As you can see, you will never be able to connect successfully to a machine using ONLY the Raspberry. Here how to solve this pickle.
+Whether using your computer or a microcomputer, you will need a logic level shifter in order to communicate safely over
+an RS-232 connection. There are two ways to go about setting up your system to reliably communicate with the SAS interface:
 
 Solution 1
 ----------
 
-Use an RS-232 to TTL logic level converter. We tested the `MAX3323 <https://www.mouser.com/ProductDetail/Analog-Devices-Maxim-Integrated/MAX3323EEPE%2b?qs=CDqwynd4ZNoRwc1iI5RFww%3D%3D>`_
+Use an RS-232 to TTL logic level converter. We tested the
+    1) `MAX3323 <https://www.mouser.com/ProductDetail/Analog-Devices-Maxim-Integrated/MAX3323EEPE%2b?qs=CDqwynd4ZNoRwc1iI5RFww%3D%3D>`_
+    2) `TRS3237EIDBR <https://www.ti.com/product/TRS3237E/part-details/TRS3237EIDBR>`_
+    3) `TRS3232EIDR <https://www.ti.com/product/TRS3232E?keyMatch=TRS3232EIDR&tisearch=universal_search&usecase=OPN-ALT>`_
+
+If you decide to create a custom circuit to work with a raspberry pi, remember to:
 
-In case you decide to buy and use the MAX3323 remember to:
 1) Update your machine:
 
 .. code-block::
@@ -77,4 +59,4 @@ In case you decide to buy and use the MAX3323 remember to:
 Solution 2
 ----------
 
-Buy and use an USB to serial adapter, we tested this `one from Prolific <https://www.amazon.com/USB-Serial-Adapter-Prolific-PL-2303/dp/B00GRP8EZU/ref=sr_1_1_sspa?dib=eyJ2IjoiMSJ9.eT7IwLbFTyi5P6wiZqvnXrIsQpdtfPz_M46xtQa_S1I6h-lpFonAvq5YC5xJqm4vO8e3APmv6ZveRIHnEk3JvZ7RPORl8CFQWSUM226Dz0JssJAFQzWxU_Rk-YZaVXY5yPT9ZX-bqG0CDKUEzPruTJWEFg-ITUZtUOwr8KLTrvxvVg-ounmiZNAaizmQvxjrTdVozOF4iRbI5UF54oqfyn1obbD9whyaS_eGnl-TRcU.CRPZSqj6-D9E9pUJExtcBxGZd89oO6OAewGmvDxATTU&dib_tag=se&keywords=prolific%2Busb%2Bto%2Bserial&qid=1705598420&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1>`_ and works like a charm and nothing has to be done on raspberry.
+Buy and use an USB to serial adapter, we tested this `one from Prolific <https://www.amazon.com/USB-Serial-Adapter-Prolific-PL-2303/dp/B00GRP8EZU/ref=sr_1_1_sspa?dib=eyJ2IjoiMSJ9.eT7IwLbFTyi5P6wiZqvnXrIsQpdtfPz_M46xtQa_S1I6h-lpFonAvq5YC5xJqm4vO8e3APmv6ZveRIHnEk3JvZ7RPORl8CFQWSUM226Dz0JssJAFQzWxU_Rk-YZaVXY5yPT9ZX-bqG0CDKUEzPruTJWEFg-ITUZtUOwr8KLTrvxvVg-ounmiZNAaizmQvxjrTdVozOF4iRbI5UF54oqfyn1obbD9whyaS_eGnl-TRcU.CRPZSqj6-D9E9pUJExtcBxGZd89oO6OAewGmvDxATTU&dib_tag=se&keywords=prolific%2Busb%2Bto%2Bserial&qid=1705598420&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1>`_ and works like a charm and no modifications required on RPi.