Hardware-set-ups - Revision history

Ted: RPI Pico default SPI pins.

2025-07-27T05:21:19Z

RPI Pico default SPI pins.

Ted: Macronix SPI NOR flash break out board by E. Madison.

2025-07-27T05:15:49Z

Macronix SPI NOR flash break out board by E. Madison.

Ted: Add modified basic RPI Pico hardware set up.

2025-07-26T06:03:03Z

Add modified basic RPI Pico hardware set up.

Ted: Add section on Zephyr basic/blinky_pwm sample and lpcxpresso55s69_cpu0 board

2022-10-20T20:35:52Z

Add section on Zephyr basic/blinky_pwm sample and lpcxpresso55s69_cpu0 board

Ted: /* ^ Serial port loopback test on Linux */ - minor formatting.

2022-10-04T19:43:31Z

^ Serial port loopback test on Linux: - minor formatting.

Ted at 19:43, 4 October 2022

2022-10-04T19:43:12Z

Ted: Add hardware set up description for testings serial port on Linux host with loopback cable.

2022-10-04T19:42:25Z

Add hardware set up description for testings serial port on Linux host with loopback cable.

Ted: Add ASCII schematic for DEV-18288 set up, very simple set up.

2022-09-30T18:33:19Z

Add ASCII schematic for DEV-18288 set up, very simple set up.

Ted: Starting new local page to hold notes on dev board set ups.

2022-09-30T18:29:15Z

Starting new local page to hold notes on dev board set ups.

New page

(1) Rpi RP2040 DEV-18288 set up 2022 Q2:

On Rpi Sparkfun board, DEV-18288 have an LED connected from GPIO p0_7, through 22kOhm resistor to plus rail pin left of the USB-C connector.

+----+
|

@@ Line 52: / Line 52: @@
      +-------------+
 </pre>
 How to flash the RPI Pico using its built-in bootloader, and with only a USB cable connected to it:

← Older revision		Revision as of 05:15, 27 July 2025
Line 42:		Line 42:
	</pre>		</pre>

		+	Macronix SPI NOR flash break out board:
		+
		+	<pre>
		+	+-------------+
		+	CS# \| * * \| VCC
		+	SO \| * * \| RESET*
		+	WP# \| * * \| SCK
		+	VSS \| * * \| SI
		+	+-------------+
		+	</pre>
		+
		+	How to flash the RPI Pico using its built-in bootloader, and with only a USB cable connected to it:

	$ sudo cp build/zephyr/zephyr.uf2 /home/ted/RPI-RP2		$ sudo cp build/zephyr/zephyr.uf2 /home/ted/RPI-RP2

@@ Line 22: / Line 22: @@
 +------------------------------+
 </pre>
 <!-- comentario -->

@@ Line 11: / Line 11: @@
     |        6|          22k    |
     |        5|                 |
-    |        4|                 |
+    |        4|                 |zephyr
     |        3|                 |
     |        2|                 |
@@ Line 23: / Line 23: @@
 </pre>
+<!-- comentario -->
 == [[#top|^]] Serial port loopback test on Linux ==
@@ Line 40: / Line 38: @@
 <!-- comentario -->

@@ Line 34: / Line 34: @@
 Invocation of stty is:
    stty -F /dev/ttyUSB4 -echo -onlcr
 Reference:  https://super-unix.com/unixlinux/unexpected-results-testing-serial-loopback-using-echo-and-cat/
 <!-- comentario -->

← Older revision		Revision as of 19:43, 4 October 2022
Line 36:		Line 36:


−	stty -F /dev/ttyUSB4 -echo -onlcr	+	stty -F /dev/ttyUSB4 -echo -onlcr
		+
		+
		+	Reference: https://super-unix.com/unixlinux/unexpected-results-testing-serial-loopback-using-echo-and-cat/
		+
		+	<!-- comentario -->

← Older revision		Revision as of 19:42, 4 October 2022
Line 22:		Line 22:
	+------------------------------+		+------------------------------+
	</pre>		</pre>
		+
		+
		+
		+
		+
		+	== [[#top\|^]] Serial port loopback test on Linux ==
		+
		+	In two terminal windows, programs `echo` and `cat` can be used to test a serial port connected to a loopback cable. This testing also effectively demonstrates the working of serial drivers under Linux. Works for USB-based FTDI cables which convert USB to a serial link. Works for the much older 16550 based serial port peripheral chips.
		+
		+	A third and precursor command, `stty` is also needed to configure given serial port for sane operation during these tests. A couple of options to `stty` utility disable a default echoing behavior on given serial port. Another option suppresses a conversion or handling of carriage return bytes, e.g. stops serial port driver at some level from converting CR to CRLF.
		+
		+	Invocation of stty is:
		+
		+
		+	stty -F /dev/ttyUSB4 -echo -onlcr

@@ Line 4: / Line 4: @@
 On Rpi Sparkfun board, DEV-18288 have an LED connected from GPIO p0_7, through 22kOhm resistor to plus rail pin left of the USB-C connector.
+<pre>
+   +---------+
+   |        9|     ^^
-    +----+
+   |        8|    //
+   |        7|---|>|---/\/\/---+