AW: Possibility of high frequency interrupt handle with MCF5223x
"Mark Butcher" <[email protected]> Mon, 6 Dec 2010 14:05:49 +0100
| Newsgroups | gmane.comp.hardware.motorola.microcontrollers.coldfire |
|---|---|
| Message-ID | <[email protected]> |
This is a multipart message in MIME format. ------=_NextPart_000_006C_01CB954E.B00D4B00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi David =20 12MHz seems rather fast for an IRQ. I would look into the use of DMA to copy the data input to a buffer and = then using its =91end of transfer=92 interrupt to send the data on. For = example, you may be able to use the trigger input to start a DMA timer sequence that = then reads the data from the port at the correct rate (there are various = other permutations in the chip which may also be able to solve it). =20 Note however that your data rate is 96Mb/s and it will not be possible = to send this over a 100M LAN (there is overhead and collisions etc.). = Probably the V2 will be able to achieve about 15Mb/s UDP so this is probably the = main bottleneck. =20 =20 Regards =20 Mark =20 =20 ************************************************** Mark Butcher Bsc (Hons) MPhil MIET=20 =20 M.J.Butcher Consulting =20 Birchstrasse 20f, CH-5406 R=FCtihof Switzerland www.mjbc.ch / www.uTasker.com=20 ++41 (0)79 402 26 37 Skype: M_J_Butcher ************************************************** =20 =20 =20 Von: [email protected] [mailto:[email protected]] = Im Auftrag von David Pang Gesendet: Montag, 6. Dezember 2010 13:16 An: [email protected] Betreff: [ColdFire] Possibility of high frequency interrupt handle with MCF5223x =20 Dear all, I want to use MCF5223x to read a 8bit digital signal and forward the = sample data to UDP packet. The signal consists of 8bit data and 1 clock, data fetch at rising edge = or falling edge. However, the clock frequency is pretty high, max frequency = is about 12MHz. Are there possible to use the CLOCK input to trigger an interrupt and = sample the data in each interrupt? I want to do the connection as below: CLOCK =3D=3D=3D> nIRQ1 DATA[8:0] =3D=3D=3D> PORT AN So the system would include 3 tasks: 1. Interrupt for data input, interrupt trigger at about 12MHz 2. UDP Packet forwarding, each packet contains 200 samples=20 3. HTTP or TCP service for system configuration Can a 60MHz ColdFireV2, 5223x, capable to do it? B.R. David ------=_NextPart_000_006C_01CB954E.B00D4B00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" = xmlns:o=3D"urn:schemas-microsoft-com:office:office" = xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" = xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta = http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"><meta name=3DGenerator content=3D"Microsoft Word = 14 (filtered medium)"><style><!-- /* Font Definitions */ @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} p.MsoPlainText, li.MsoPlainText, div.MsoPlainText {mso-style-priority:99; mso-style-link:"Nur Text Zchn"; margin:0cm; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-fareast-language:EN-US;} span.E-MailFormatvorlage17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} span.NurTextZchn {mso-style-name:"Nur Text Zchn"; mso-style-priority:99; mso-style-link:"Nur Text"; font-family:"Calibri","sans-serif";} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif"; mso-fareast-language:EN-US;} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 2.0cm 70.85pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DDE-CH link=3Dblue = vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span = lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Hi David<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>12MHz seems rather fast for an IRQ.<o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>I would look into the use of DMA to copy the data input to a buffer = and then using its ‘end of transfer’ interrupt to send the = data on. For example, you may be able to use the trigger input to start = a DMA timer sequence that then reads the data from the port at the = correct rate (there are various other permutations in the chip which may = also be able to solve it).<o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Note however that your data rate is 96Mb/s and it will not be = possible to send this over a 100M LAN (there is overhead and collisions = etc.). Probably the V2 will be able to achieve about 15Mb/s UDP so this = is probably the main bottleneck.<o:p></o:p></span></p><p = class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Regards<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Mark<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoPlainText><span = lang=3DEN-GB style=3D'font-family:"Courier = New"'>**************************************************<o:p></o:p></span= ></p><p class=3DMsoPlainText><span lang=3DEN-GB = style=3D'font-family:"Courier New"'>Mark Butcher Bsc = (Hons) &= nbsp; MPhil MIET <o:p></o:p></span></p><p = class=3DMsoPlainText><span lang=3DEN-GB style=3D'font-family:"Courier = New"'> <o:p></o:p></span></p><p class=3DMsoPlainText><span = lang=3DEN-GB style=3D'font-family:"Courier New"'>M.J.Butcher = Consulting &nb= sp; <o:p></o:p></span></p><p = class=3DMsoPlainText><span style=3D'font-family:"Courier = New"'>Birchstrasse = 20f, &nb= sp; CH-5406 = R=FCtihof<o:p></o:p></span></p><p class=3DMsoPlainText><span = style=3D'font-family:"Courier = New"'>Switzerland = <a href=3D"http://www.mjbc.ch">www.mjbc.ch</a> / <a = href=3D"http://www.uTasker.com">www.uTasker.com</a> = <o:p></o:p></span></p><p class=3DMsoPlainText><span lang=3DEN-GB = style=3D'font-family:"Courier New"'>++41 (0)79 402 26 = 37 = Skype: M_J_Butcher<o:p></o:p></span></p><p class=3DMsoPlainText><span = lang=3DEN-GB style=3D'font-family:"Courier = New"'>**************************************************<o:p></o:p></span= ></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span lang=3DEN-GB = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><b><span lang=3DDE = style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span><= /b><span lang=3DDE = style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> = [email protected] [mailto:[email protected]] <b>Im = Auftrag von </b>David Pang<br><b>Gesendet:</b> Montag, 6. Dezember 2010 = 13:16<br><b>An:</b> [email protected]<br><b>Betreff:</b> [ColdFire] = Possibility of high frequency interrupt handle with = MCF5223x<o:p></o:p></span></p><p = class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Dear = all,<br><br>I want to use MCF5223x to read a 8bit digital signal and = forward the sample data to UDP packet.<br>The signal consists of 8bit = data and 1 clock, data fetch at rising edge or falling edge. However, = the clock frequency is pretty high, max frequency is about 12MHz.<br>Are = there possible to use the CLOCK input to trigger an interrupt and sample = the data in each interrupt?<br><br>I want to do the connection as = below:<br>CLOCK &nbs= p; =3D=3D=3D> = nIRQ1<br>DATA[8:0] = =3D=3D=3D> PORT AN<br><br>So the system would include 3 = tasks:<br>1. Interrupt for data input, interrupt trigger at about = 12MHz<br>2. UDP Packet forwarding, each packet contains 200 samples = <br>3. HTTP or TCP service for system configuration<br><br>Can a 60MHz = ColdFireV2, 5223x, capable to do = it?<br><br><br>B.R.<br>David<o:p></o:p></p></div></body></html> ------=_NextPart_000_006C_01CB954E.B00D4B00-- --- [email protected] Send a post to the list. [email protected] Join the list. [email protected] Join the list in digest mode. [email protected] Leave the list.