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2026-03-22 22:04:12 -07:00
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Applications/UberGuidoZ/gpio_logic_analyzer/README.md
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By: UberGuidoZ | https://github.com/UberGuidoZ/Flipper By: UberGuidoZ | https://github.com/UberGuidoZ/Flipper
Code: Applications/My_Creations/gpio_logic_analyzer Code: [Applications/UberGuidoZ/gpio_logic_analyzer/Source](https://github.com/UberGuidoZ/Flipper/tree/main/Applications/UberGuidoZ/gpio_logic_analyzer/Source)
A logic analyzer that monitors all 8 exposed GPIO pins on the Flipper Zero A logic analyzer that monitors all 8 exposed GPIO pins on the Flipper Zero
18-pin header, draws live scrolling waveforms on the 128x64 OLED, and logs 18-pin header, draws live scrolling waveforms on the 128x64 OLED, and logs
@@ -12,7 +12,7 @@ every sample to a timestamped CSV file on the SD card, with instructions.
## Quick start ## Quick start
1. Build and side-load (see Building section below) or grab from App Store. 1. Grab FAP from [Release folder](https://github.com/UberGuidoZ/Flipper/tree/main/Applications/UberGuidoZ/gpio_logic_analyzer/Release), build and side-load (see Building section below), or download from App Store.
2. On the Flipper, navigate to **Apps > GPIO > GPIO Logic Analyzer**. 2. On the Flipper, navigate to **Apps > GPIO > GPIO Logic Analyzer**.
3. Select **Instructions** to review the voltage limits and control map. 3. Select **Instructions** to review the voltage limits and control map.
4. Select **Start Analyzer** to begin capture. 4. Select **Start Analyzer** to begin capture.
@@ -20,6 +20,12 @@ every sample to a timestamped CSV file on the SD card, with instructions.
--- ---
## Screenshots
Screenshots of the various screens [can be found here](https://github.com/UberGuidoZ/Flipper/tree/main/Applications/UberGuidoZ/gpio_logic_analyzer/Screenshots).
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## Main Menu ## Main Menu
| Item | Action | | Item | Action |
@@ -35,14 +41,14 @@ every sample to a timestamped CSV file on the SD card, with instructions.
``` ```
GPIO Analyzer RUN 100Hz* GPIO Analyzer RUN 100Hz*
--------------------------------- ---------------------------------
A7 [~~~~|____|~~~~] H A7 [~~~~|__________|~~~~] H
A6 [____|~~~~|____] L A6 [_______|~~~~|_______] L
A4 [________________] L A4 [____________________] L
B3 [~~~~~~~~~~~~~~~~] H B3 [~~~~~~~~~~~~~~~~~~~~] H
B2 [________________] L B2 [____________________] L
C3 [~~|___|~~~|____] H C3 [~~~~|_____|~~~~|____] L
C1 [__|~~~|______] L C1 [_____|~~~~~~~|______] L
C0 [~~~|___|~~] H C0 [~~~~~~|______|~~~~~~] H
``` ```
- Each row is one GPIO pin. - Each row is one GPIO pin.
@@ -79,14 +85,14 @@ C0 [~~~|___|~~] H
| 7 | C1 | PC1 | Pin 15 | 3.3V max | | 7 | C1 | PC1 | Pin 15 | 3.3V max |
| 8 | C0 | PC0 | Pin 16 | 3.3V max | | 8 | C0 | PC0 | Pin 16 | 3.3V max |
All pins are configured as digital inputs with no internal pull resistor. All pins are configured as digital inputs with no internal pull resistor.<br>
They are returned to high-impedance analog mode when you exit the analyzer. They are returned to high-impedance analog mode when you exit the analyzer.
**Voltage warning**: Do not connect signals above 3.3V to any pin except PA4. **Voltage warning**: Do not connect signals above 3.3V to any pin except PA4.<br>
No pull-up or pull-down resistors are enabled. Add external resistors to No pull-up or pull-down resistors are enabled. Add external resistors to<br>
your circuit if the signals you are probing have undefined idle states. your circuit if the signals you are probing have undefined idle states.
FAILURE TO FOLLOW THIS WARNING COULD CAUSE FLIPPER TO LEAK MAGIC SMOKE! ***FAILURE TO FOLLOW THIS WARNING COULD CAUSE FLIPPER TO LEAK MAGIC SMOKE!***
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@@ -155,9 +161,7 @@ To build inside the full firmware tree instead:
./fbt fap_gpio_logic_analyzer ./fbt fap_gpio_logic_analyzer
``` ```
To add a custom icon, drop a 10x10 pixel PNG named `gpio_analyzer_icon.png` To change the custom icon, drop a 10x10 pixel PNG named `gpio_analyzer_icon.png` overwriting the existing.
into this directory and add `fap_icon="gpio_analyzer_icon.png"` to
`application.fam`.
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