Blog 03 - Revision history

Cartridge1987: /* Change A: X to A: 94 */

2015-11-30T13:36:10Z

Change A: X to A: 94

Cartridge1987: /* Change A: X to A: 94 */

2015-11-30T13:35:25Z

Change A: X to A: 94

Cartridge1987: /* Change A: X to A: 94 */

2015-11-23T10:22:50Z

Change A: X to A: 94

Cartridge1987: /* Change A: X to A: 94 */

2015-09-21T15:55:38Z

Change A: X to A: 94

Cartridge1987: /* Change A: X to A: 94 */

2015-09-21T13:06:45Z

Change A: X to A: 94

Cartridge1987: /* Change A: X to A: 94 */

2015-09-16T10:12:27Z

Change A: X to A: 94

Cartridge1987 at 10:10, 16 September 2015

2015-09-16T10:10:33Z

Cartridge1987 at 15:27, 11 September 2015

2015-09-11T15:27:44Z

Cartridge1987 at 14:54, 11 September 2015

2015-09-11T14:54:19Z

Cartridge1987 at 13:18, 11 September 2015

2015-09-11T13:18:04Z

@@ Line 141: / Line 141: @@
 Note:
-At I2c the values are in hexadecimals and get divided by two. That explains why 94 is 4A in i2cdetect.
+At I2c the values are in hexadecimals and get divided by two. That explains why 94 is 4a in i2cdetect.
 If you want to change an address with an hexadecimal letter you can use capital and lower case letters.

@@ Line 139: / Line 139: @@
 Now it is fixed we can explore the things we can do with the Raspberry interface!
+Note:
+At I2c the values are in hexadecimals and get divided by two. That explains why 94 is 4A in i2cdetect.
+If you want to change an address with an hexadecimal letter you can use capital and lower case letters.
 Go to [[Blog 04]], where I will make it possible to use the Raspberry interface as clock.

@@ Line 125: / Line 125: @@
 When you do i2cdetect as above you will get the same result but than without the 4a visible:
- modprobe i2c-dev
+ sudo modprobe i2c-dev
- i2cdetect -y 1
+ sudo i2cdetect -y 1
 but then without the 4a displayed on your screen.

← Older revision		Revision as of 15:55, 21 September 2015
Line 113:		Line 113:
	[[File:94.png\|300px\|thumb\|none\|]]		[[File:94.png\|300px\|thumb\|none\|]]

	On the image you can see how it ~~actually~~ has to look like.		On the image you can see how it normally has to look like.

@@ Line 136: / Line 136: @@
  bw_tool -I -D /dev/i2c-1 -a 94 -W 14:0
-to restart the display
+The above command is to reconnect the display.
 Now it is fixed we can explore the things we can do with the Raspberry interface!

@@ Line 106: / Line 106: @@
-I once experienced that this all eventually didn't work on my display the raspberry was saying:
+I once experienced that rebooting didn't help for me getting to see A: 94. On my Display was the text visible:
 I2C_rpi_ui 1.6
-A: 94
+A: 1
 [[File:94.png|300px|thumb|none|]]
-As you can see on the image
+On the image you can see how it actually has to look like.
-But if you don't have that and have that the raspberry is saying something like;
- A: 1
-you have to change this or always write to
+If you have A:1 you have to write:
+ -a 1
- a -1 to say Hello, Dave.
+instead of:
+ -a 94
 Example:
@@ Line 130: / Line 130: @@
 but then without the 4a displayed on your screen.
-But you can change the problem with these commands:
+You can change A: 1 to A: 94 with these commands:
  bw_tool -I -D /dev/i2c-1 -a 0 -w f1:55 F2:aa f0:94
-and to remove and connect the display again.
+After this command: remove and connect the display.
  bw_tool -I -D /dev/i2c-1 -a 94 -W 14:0
 to restart the display
-Now we can explore the things we can do with the Raspberry interface.
+Now it is fixed we can explore the things we can do with the Raspberry interface!
-Go to [[Blog 04]], where I will print the time on the display.
+Go to [[Blog 04]], where I will make it possible to use the Raspberry interface as clock.

@@ Line 1: / Line 1: @@
 Hello,
-I wanted to make it possible to show the temperature + time on a Raspberry Display. Before that I am going to try other little things so that I can get some experience. What I am now going to make possible is that text that I write in the shell as code will be printed on screen.
+I wanted to make it possible to show the temperature + time on a Raspberry Display. Before that I am going to try other little things so that I can get some experience. What I am now going to make possible is that text that I write in the shell as code will be printed on display.
 ( So that I know how to print text on the display )
@@ Line 8: / Line 8: @@
  git clone https://github.com/rewolff/bw_rpi_tools.git
-(after reboot)
+After a reboot add i2c in the group
+ reboot
-Add it in the i2c the group
+For adding user pi to group i2c:
  sudo gpasswd -a pi i2c
-For adding user pi to group i2c
 To look if it is added:
  groups
-Which will give as result
+At my it gave the result:
  pi adm dialout cdrom sudo audio video plugdev games users netdev gpio i2c spi input
-(Your list can of course be bigger or smaller. If it atleast has the i2c everything is fine)
+(Your list can of course be bigger or smaller. If it at least has the i2c everything is fine)
  sudo -s
-This code is for getting in the root, so that I don't have to type: sudo anymore.
+This code is for getting in the root, so that I don't have to type: sudo any more.
-This is handy because many commands need sudo.
+This is a handy command because many commands need sudo.
  apt-get install i2c-tools
@@ Line 42: / Line 42: @@
 When you then reboot the raspberry he will directly use the code.
 With the code he then knows he I connected to the i2c display.
-(To reboot you just have to type: reboot)
+(To reboot you just have to type: reboot as I said before)
 To finally look when rebooted if he actually can see him:
@@ Line 48: / Line 48: @@
  i2cdetect
-[[File:I2cdetecty.jpg|500px|thumb|left|]]
+[[File:I2cdetecty.jpg|500px|thumb|none|]]
+To check if it works. I will look if it show the location of the i2c.
-To check if it works:
-It will show the location of the i2c.
  modprobe i2c-dev
  i2cdetect -y 1
 Which should give as result:
-[[File:I2cdetect.jpg|500px|thumb|left|]]
+[[File:I2cdetect.jpg|500px|thumb|none|]]
 reboot if it doesn't appear this can happen if you didn't activate the right code.
-If that doesn't help go to:*
+If that doesn't help go to: "Change A: X to A: 94"
@@ Line 141: / Line 102: @@
 Later I want to get with these the possibility to get a temperature visible.
-* also experienced that this all eventually didn't work on my display the raspberry was saying:
+== Change A: X to A: 94 ==
+I once experienced that this all eventually didn't work on my display the raspberry was saying:
 I2C_rpi_ui 1.6
 A: 94
@@ Line 173: / Line 138: @@
 Now we can explore the things we can do with the Raspberry interface.
 Go to [[Blog 04]], where I will print the time on the display.

← Older revision		Revision as of 14:54, 11 September 2015
Line 173:		Line 173:

	Now we can explore the things we can do with the Raspberry interface.		Now we can explore the things we can do with the Raspberry interface.



			Go to [[Blog 04]], where I will print the time on the display.

@@ Line 119: / Line 119: @@
 To remove all the printed text from the screen use the code:
-# bw_tool -I -D /dev/i2c-1 -a 94 -w 10:0
+ bw_tool -I -D /dev/i2c-1 -a 94 -w 10:0
 (for other commands go to the the wiki from the [http://www.bitwizard.nl/wiki/index.php/User_Interface user interface]:
@@ Line 151: / Line 151: @@
 But if you don't have that and have that the raspberry is saying something like;
-A: 1
+ A: 1
 you have to change this or always write to