Re: [Paparazzi-devel] GASoline sensor

[Felix Ruess]

Hi Eduardo,

the best way would probably be to create a new trigger_counter module (feel free to choose a better name).

That module would just count "trigger" events (rising, falling or both edges). The module itself should only contain the arch independent interface (like trigger_ext) and the actual implementation be in arch/lpc21 (and stm32).

Then use the output from that generic module to convert to the gasoline consumption in liters.

Hope that helps,

Felix

On Sun, Oct 6, 2013 at 9:08 PM, Eduardo lavratti <address@hidden> wrote:

I ordered from rapid online.
http://www.rapidonline.com/Electronic-Components/B-I-O-TECH-e-K-Aggressive-Chemical-Low-Flow-Flowmeter-0-015-0-8-L-min-50-0028

i pay 28U$ each sensor.

---

From: address@hidden
To: address@hidden
Date: Sun, 6 Oct 2013 12:23:45 +0300
Subject: Re: [Paparazzi-devel] GASoline sensor

Hi Eduardo,

 

Where did you buy your sensor? What is the price of it? We also need a gasoline sensor.

 

From: paparazzi-devel-bounces+refiksever=address@hidden [mailto:paparazzi-devel-bounces+refiksever=address@hidden] On Behalf Of Eduardo lavratti
Sent: Sunday, October 6, 2013 1:15 AM
To: Paparazzi developer forum
Subject: [Paparazzi-devel] GASoline sensor

 

Well, my gasoline sensor come today.
The sensor output 10000 impulse/liter in TTL level.

Some time ago i asked about how can i read the sensor that output pulses and somebody pointed me to XTEND_RSSi and EXTERNAL TRIGGER but this 2 modules are for read a pulse width.

I can use the external_trigger module with some modification but its waste of code and capture module.

I need a simple external interrupt.
Here are my question: can i use an arch code like the code used for MAX1168 EOC interrupt ?

My idea is to use the DRDY pin (TWOG BOARD) connected to sensor output so i can receive the pulses as interrupt.

When interrupt occur i increment a counter and read the counter in module periodic.

Each pulse is equal to 1/10000liter so i will integrate to get how much gasoline the motor used.

Can some one talk about ? its possible with eint0 ?

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