Blog 23 - Revision history

Cartridge1987: /* Arduino */

2015-12-29T11:48:18Z

Arduino

Cartridge1987 at 11:47, 29 December 2015

2015-12-29T11:47:56Z

Cartridge1987 at 11:35, 29 December 2015

2015-12-29T11:35:41Z

Cartridge1987 at 10:25, 29 December 2015

2015-12-29T10:25:05Z

Cartridge1987: Created page with " == Working with multiple analog meters == I got my second analog meter too late, thanks to that my previous clocks/timers only have one analog meter in them. But now I got m..."

2015-12-29T10:14:12Z

Created page with " == Working with multiple analog meters == I got my second analog meter too late, thanks to that my previous clocks/timers only have one analog meter in them. But now I got m..."

New page

== Working with multiple analog meters ==

I got my second analog meter too late, thanks to that my previous clocks/timers only have one analog meter in them.
But now I got my second analog meter I still want to explain how to get two analog meters to work on one DIO.

=== Connecting the second analog meter ===

The second analog meter I put on pin 4. The DIO has at the connector pins only one ground.
That is why I instead of using a splitter, I just used the I2C connector as ground.

@@ Line 41: / Line 41: @@
 === Arduino ===
-The above explanation should like this on arduino:
+The above explanation should look this on arduino:
  void setup()
  {

@@ Line 55: / Line 55: @@
 *[[DIO]]
 *[[DIO protocol]]
+*[[Blog 21]] - For the original Raspberry Pi version of the clock and timer.
+*[[Blog 22]] - For the original Arduino version of the clock and timer.

@@ Line 4: / Line 4: @@
 I got my second analog meter too late, thanks to that my previous clocks/timers only have one analog meter in them.
 But now I got my second analog meter I still want to explain how to get two analog meters to work on one DIO.
+Note my explanations are made for the I2C.
 === Connecting the second analog meter ===
@@ Line 9: / Line 10: @@
 The second analog meter I put on pin 4. The DIO has at the connector pins only one ground.
 That is why I instead of using a splitter, I just used the I2C connector as ground.
 [[File:TwoMetersOneDIO.jpg|500px]]
+The Code:
+You probably read this before.
+But when you want to let the pins work you have to follow three steps.
+The first two steps are that you have to enable the PWM and defining which pin as output.
+With register 30 you define which pin is an output.
+With register 5f you define which pin has to have PWM enabled.
+In my example I have the meter connected with pin 3(IO0) + 4(IO1).
+The registers work with bitmasking. So, that means that in my example I have to calculate:
+Pin 3 + Pin 4 => 01 + 02 = 03.
+With that I have to give the value 03.
+Now you can change the PWM value of the two pins.
+You can this by using register 50-56( From the first pin to the last pin ).
+I want to get the first pin have maximum PWM and the second 50%.
+The first pin should be register 50 and the value FF. ( It works in two hexadecimals )
+The second pin should be register 51 with the value 80.
+More about what values are given to which pin you can read in the: [[DIO protocol]]
+=== Raspberry Pi ===
+The above explanation should look like this in bash code:
+ bw_tool -I -D /dev/i2c-1 -a 84 -W 30:03
+ bw_tool -I -D /dev/i2c-1 -a 84 -W 5f:03
+ bw_tool -I -D /dev/i2c-1 -a 84 -W 50:FF
+ bw_tool -I -D /dev/i2c-1 -a 84 -W 50:80
+=== Arduino ===
+The above explanation should like this on arduino:
+ void setup()
+ {
+   Wire.begin(); // wake up I2C bus
+   Serial.begin(9600);
+   set_var(0x42, 0x30, 0x03);
+   set_var(0x42, 0x5f, 0x03);
+   set_var(0x42, 0x50, 0xFF);
+   set_var(0x42, 0x51, 0x80);
+ }
+== Useful links ==
+*[[DIO]]
+*[[DIO protocol]]