IR Receiver - Revision history

JulienB: /* Hardware */

2008-10-29T18:02:43Z

Hardware

← Older revision		Revision as of 19:02, 29 October 2008
Line 12:		Line 12:
	RC5 IP in the FPGA will decode Manchester frames and store them in a FIFO. At that time it will generate an interrupt to signal i.MXL Linux driver that data are available.		RC5 IP in the FPGA will decode Manchester frames and store them in a FIFO. At that time it will generate an interrupt to signal i.MXL Linux driver that data are available.

	IP will be configurable with:		This IP will conform to Wishbone/POD interface and be configurable with:
	* a control register to activate/deactivate interrupt		* a control register to activate/deactivate interrupt
	{\| border="0" cellpadding="5" cellspacing="0" summary="IR CTRL"		{\| border="0" cellpadding="5" cellspacing="0" summary="IR CTRL"

JulienB: Add fifo register

2008-10-29T18:01:30Z

Add fifo register

@@ Line 31: / Line 31: @@
 |}
-* a status register to see interrupt status and acknowledge them
+* a status register to see interrupt status and acknowledge them: will use wishbone irq_handler
-* a FIFO register to get RC5 frame one at a time (and prevent frame lost when one is currently being received)
+* a FIFO register to get RC5 frame one at a time (and prevent frame lost when one is currently being received):
 ==Software==

JulienB: Add ctrl register

2008-10-29T17:56:21Z

Add ctrl register

@@ Line 13: / Line 13: @@
 IP will be configurable with:
-* a configuration register to activate/deactivate interrupt
+* a control register to activate/deactivate interrupt
 * a status register to see interrupt status and acknowledge them
 * a FIFO register to get RC5 frame one at a time (and prevent frame lost when one is currently being received)

JulienB: /* Hardware */

2008-10-29T17:48:24Z

Hardware

← Older revision		Revision as of 18:48, 29 October 2008
Line 6:		Line 6:

	==Hardware==		==Hardware==
	For first tries we choose the Sharp's xxxxx as IR receiver. This chip is is 3,3v compatible and can be directly connected to i.MXL or FPGA IOs.		For our first tries we choose the Sharp's xxxxx IR receiver. This chip is 3,3v compatible and can be directly connected to i.MXL or FPGA IOs.
	As RC5 decoding in software is quite a big overhead, we choose to implement an RC5 decoding IP for the FPGA.<br>		As RC5 decoding in software is quite a big overhead, we choose to implement an RC5 decoding IP for the FPGA.<br>
	On x86 architecture a serial port is often used to decode RC5 ~~frame~~ but it's very CPU ~~consumming~~.		On x86 architecture a serial port is often used to decode RC5 frames but it's very CPU consuming.

			RC5 IP in the FPGA will decode Manchester frames and store them in a FIFO. At that time it will generate an interrupt to signal i.MXL Linux driver that data are available.

	~~RC5 IP in the FPGA will decode Manchester frame and store it in a FIFO. When there are frame in the FIFO the FPGA will generate an interrupt to signal i.MXL Linux driver that data are available~~
	IP will be configurable with:		IP will be configurable with:
	* an configuration register to activate/deactivate interrupt		* a configuration register to activate/deactivate interrupt
	* a status register to see interrupt status and acknowledge them		* a status register to see interrupt status and acknowledge them
	* a FIFO register to get RC5 frame one at a time		* a FIFO register to get RC5 frame one at a time (and prevent frame lost when one is currently being received)

	==Software==		==Software==

Salocin68 at 09:29, 29 March 2008

2008-03-29T09:29:48Z

← Older revision		Revision as of 10:29, 29 March 2008
Line 25:		Line 25:
	* http://users.pandora.be/davshomepage/rc5.htm		* http://users.pandora.be/davshomepage/rc5.htm

	[[Category~~:Hardware~~:UserInput]]		[[Category:UserInput]]

Salocin68 at 09:22, 29 March 2008

2008-03-29T09:22:00Z

← Older revision		Revision as of 10:22, 29 March 2008
Line 24:		Line 24:
	* http://www.lirc.org/#top		* http://www.lirc.org/#top
	* http://users.pandora.be/davshomepage/rc5.htm		* http://users.pandora.be/davshomepage/rc5.htm

			[[Category:Hardware:UserInput]]

JulienB at 15:16, 5 August 2007

2007-08-05T15:16:02Z

← Older revision		Revision as of 16:16, 5 August 2007
Line 1:		Line 1:
	This page will summarize the informations to connect an InfraRed receiver to your Armadeus board		This page will summarize the informations to connect an InfraRed receiver to your Armadeus board

			==Introduction==
			Most IR remote control send their key code using the RC5 protocol (see links). This protocol can be mostly seen as a one wire serial Manchester link.
			In this application we will see how to user 38Khz carrier IR receiver.

			==Hardware==
			For first tries we choose the Sharp's xxxxx as IR receiver. This chip is is 3,3v compatible and can be directly connected to i.MXL or FPGA IOs.
			As RC5 decoding in software is quite a big overhead, we choose to implement an RC5 decoding IP for the FPGA.<br>
			On x86 architecture a serial port is often used to decode RC5 frame but it's very CPU consumming.

			RC5 IP in the FPGA will decode Manchester frame and store it in a FIFO. When there are frame in the FIFO the FPGA will generate an interrupt to signal i.MXL Linux driver that data are available
			IP will be configurable with:
			* an configuration register to activate/deactivate interrupt
			* a status register to see interrupt status and acknowledge them
			* a FIFO register to get RC5 frame one at a time

			==Software==
			We will use LIRC framework. A custom Linux driver will have to be written.
			As RC5 is very similar to PS/2 we will reuse the work done for PS/2 controller.

	==Links==		==Links==

JulienB: /* Links */

2007-06-05T20:37:10Z

Links

← Older revision		Revision as of 21:37, 5 June 2007
Line 4:		Line 4:
	* http://www.positron-libre.com/electronique/protocole/rc5/code-rc5.htm		* http://www.positron-libre.com/electronique/protocole/rc5/code-rc5.htm
	* http://www.lirc.org/#top		* http://www.lirc.org/#top
			* http://users.pandora.be/davshomepage/rc5.htm

JulienB: page creation

2007-05-03T22:13:11Z

page creation

New page

This page will summarize the informations to connect an InfraRed receiver to your Armadeus board

==Links==
* http://www.positron-libre.com/electronique/protocole/rc5/code-rc5.htm
* http://www.lirc.org/#top