Differences

This shows you the differences between two versions of the page.

--- en:pfw:dht22 [2025-06-26 12:21] – [Numerical representation of the measured values] mka
+++ en:pfw:dht22 [2025-06-27 12:05] (current) – [Implementation for RP2040 using a PIO block] mka
@@ Line 56: / Line 56: @@
 {{ :en:pfw:dht22-bit_lesen_mit_2xmoon.png?nolink |The timing is critical. So, it's correct now. Here we read a "0"}}
-===== Implementation for TI's Launchpad =====
+====== Implementation for TI's Launchpad ======
+This program was used to test DHT22 modules before installation. The DHT22 modules were tested for functionality at room temperature, pre-sorted in this way, and then frozen in a bag of moist sand in the freezer and tested again. One module displayed incorrect temperature values in frost conditions, the display of negative values did not comply with the specifications.
-[[en:pfw:dht22-msp430g2553-noforth|DHT22 with Launchpad MSP430G2553 and noForth]]
+[[en:pfw:dht22-msp430g2553-noforth|DHT22 for Launchpad MSP430G2553 and noForth]]
-This program was used to test DHT22 modules before installation. The DHT22 modules were tested for functionality at room temperature, pre-sorted in this way, and then frozen in a bag of moist sand in the freezer and tested again. One module displayed incorrect temperature values in frost conditions, the display of negative values did not comply with the specifications.
+====== Implementation for RP2040 ======
+[[en:pfw:dht22-rp2040-nofortht|DHT22 for the Raspberry Pi Pico Board RP2040 and noForth t]] using a PIO block
-===== Background Information =====
+PIO stands for //Programmable Input Output//. You can program the PIO blocks with the [[en:pfw:assemblers_pio-assembler|noforth t PIO Assembler]].
+====== Background Information ======
   * How this was discovered: [[en:pfw:dht22tmpformat|The temperature format of the DHT22]]
-=== MSP430G2553 ===
   * [[https://www.ti.com/lit/ug/slau144j/slau144j.pdf|MSP430x2xx Family guide SLAU144J.PDF]]
   * [[https://www.ti.com/lit/ds/symlink/msp430g2553.pdf|MSP430G2553 datasheet SLAS735J.PDF]], port data on page 49ff
+  * [[https://home.hccnet.nl/anij/nof/noforth.html| noforth.html - find your version, docmentation,  tool.f and asm.f here.]] All about noForth.
+  * [[en:pfw:whatisapioblock|What is a PIO block?]]
-=== All about noForth ===
+====== Aids ======
-[[https://home.hccnet.nl/anij/nof/noforth.html| noforth.html - find your version, docmentation,  tool.f and asm.f here.]]
----
-=== Source code editor ===
+MK:\\
 I like //Notepad Next// for Linux, a cross-platform, reimplementation of //Notepad++//.
-https://github.com/dail8859/NotepadNext
+https://github.com/dail8859/NotepadNext\\
-=== Terminal ===
 To work with the embedded noForth system I use //e4thcom// by Manfred Mahlow.
-https://wiki.forth-ev.de/doku.php/projects:e4thcom
+https://wiki.forth-ev.de/doku.php/projects:e4thcom\\
+Sometimes I also use Windows and Teraterm, for example, to log longer MCU outputs to a file. I also prefer it for testing parts of the source code using copy and paste.\\
-Sometimes I also use Windows and Teraterm, for example, to log longer MCU outputs to a file. I also prefer it for testing parts of the source code using copy and paste.
+In this project I used a Logic Analyzer by AZDelivery, 8 CH, 24MHz. (Amazon)\\
-=== Logic Analyser ===
-AZDelivery Logic Analyzer 8 CH, 24MHz. (Amazon)\\
 //PulseView// is a Qt-based logic analyzer and oscilloscope GUI for sigrok.
----