Driver / Strain gauge

Driver for a strain gauge. More...

Functions
void	sg_Init (AdcChannel channel)
	Initialize the strain gauge driver. More...
float32_t	sg_Get (void)
	Return the measured force on the paddle. More...

Detailed Description

Driver for a strain gauge.

This driver uses an ADC input, ANIN1 or ANIN2 (see ADC). To use this, connect wire the sensor as this:

• sensor + -> +5V (pin 1 or 5 of J2).
• sensor - -> GND (pin 2 or 6 of J2).
• sensor sense -> ANINX+ (pin 3 or 7 of J2).
• 2.5V (with a voltage divider between 5V and GND) -> ANINX- (pin 4 or 8 of J2).

Set the sensitivity switches to +-33mV.

Call sg_Init() first in the initialization code. Then, call sg_Get() to get the force.

Function Documentation

float32_t sg_Get

(

void

)

Return the measured force on the paddle.

Return values

The	force applied to the top of the paddle [N].

Warning

this function is not implemented yet, and returns actually the raw voltage from the sensor, instead of the ready-to-use force.

void sg_Init

(

AdcChannel

channel

)

Initialize the strain gauge driver.

Parameters

channel

the ADC channel the strain gauge is wired to (0 or 1).