ofxGPIO Update example

kashim · January 25, 2017, 12:36pm

Add two new example:

OLED 128x64 i2c:

Compass HMC5883L:

kashim · January 29, 2017, 12:26pm

add example-i2c-scanner for detect address.
add Class LogHighLight for output color.
add Class kalman-filter for MPU and Compass for filtering data.

fresla · November 8, 2017, 10:22am

Hi, I want to use your addon ofxGpio with a project using an SPI ADC- the MPC3008, I see you have an SPI example, but how can I get access to all 8 channels of input?

kashim · November 8, 2017, 11:24am

this example can be useful, the MCP class is a SPI clone to facilitate interface with MCPx integrate. the variable:

int a2dChannel = 0;

specific the input you want to use, from 0 to 7

code:

github.com

kashimAstro/ofxGPIO/blob/master/example-without-OF-mcp/src/main.cpp

#include <iostream>
#include "ofxGPIO.h"

int main(){
	int a2dVal = 0;
	int a2dChannel = 0;
        unsigned char data[3];
	MCP mcp;
	mcp.setup("/dev/spidev0.0", SPI_MODE_0, 1000000, 8);
	while(1)
	{
		 data[0] = 1;
		 data[1] = 0b10000000 |( ((a2dChannel & 7) << 4));
		 data[2] = 0;
		 mcp.readWrite(data);
		 a2dVal = 0;
		 a2dVal = (data[1]<< 8) & 0b1100000000;
		 a2dVal |=  (data[2] & 0xff);
		 cout << "The Result is: " << a2dVal << endl;
		 usleep(5000);

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fresla · November 9, 2017, 6:33pm

Thanks, it works like a charm, and thanks for the work on the addon, really useful and amazing examples!