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I¹m working on a project for school and have been giving a DSP56827. I¹ve installed the Motorola SDK 2.41 and have tried to run the Codec sample project that came with the SDK through CodeWarrior, but it will not work. I have probed all the data lines around the codec (clock, sync and data to the DSP) and they seem to be working correctly but the DSP cannot read or write any data. It looks like there is a problem with either the software or the DSP itself. I can download and test some other sample programs such as the quad timer, but again I¹m unable to send and receive serial data through the SCI port using the sample code. I find it hard to believe that part of the DSP isn¹t working, but I also find it hard to believe that the sample code given by Motorola doesn¹t work either. As I am new to this board I may be missing something so any help would be greatly appreciated.

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James, One common thing to miss is the fact that the DIP switches on S4 have to be OFF in order for the Codec example to work. Support just ran the project on their DSP56F827EVM on CodeWarrior for DSP56800 R5.0 and SDK R2.5 and it worked fine. Ron Ron Liechty Ombudsman for Metrowerks James Ball wrote: > I¹m working on a project for school and have been giving a DSP56827. I¹ve > installed the Motorola SDK 2.41 and have tried to run the Codec sample > project that came with the SDK through CodeWarrior, but it will not work. I > have probed all the data lines around the codec (clock, sync and data to the > DSP) and they seem to be working correctly but the DSP cannot read or write > any data. It looks like there is a problem with either the software or the > DSP itself. I can download and test some other sample programs such as the > quad timer, but again I¹m unable to send and receive serial data through the > SCI port using the sample code. I find it hard to believe that part of the > DSP isn¹t working, but I also find it hard to believe that the sample code > given by Motorola doesn¹t work either. > > As I am new to this board I may be missing something so any help would be > greatly appreciated. -- Announcing CodeWarrior 8 for Mac and Windows are now Shipping !! Metrowerks, maker of CodeWarrior - "Software Starts Here" Ron Liechty - - http://www.metrowerks.com

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Hello James, I seem to remember a similar problem with the 56F826EVM some time ago. Take a look in config.h, (Embedded SDK\src\dsp56f827evm\nos\config\confih.h),and check the following lines, #define CODEC_ISL CODEC_LEFT_INPUT_LINE_1 #define CODEC_ISR CODEC_RIGHT_INPUT_LINE_1 I seem to remember they wrongly configured the codec for line 2 and the audio input is connected to line 1. If it says LINE_2, change the 2 to a 1 and it should work. Regards, Mick Hodges ----- Original Message ----- From: "James Ball" <> To: <> Sent: Saturday, June 15, 2002 3:13 PM Subject: [motoroladsp] DSP56827 Codec I¹m working on a project for school and have been giving a DSP56827. I¹ve installed the Motorola SDK 2.41 and have tried to run the Codec sample project that came with the SDK through CodeWarrior, but it will not work. I have probed all the data lines around the codec (clock, sync and data to the DSP) and they seem to be working correctly but the DSP cannot read or write any data. It looks like there is a problem with either the software or the DSP itself. I can download and test some other sample programs such as the quad timer, but again I¹m unable to send and receive serial data through the SCI port using the sample code. I find it hard to believe that part of the DSP isn¹t working, but I also find it hard to believe that the sample code given by Motorola doesn¹t work either. As I am new to this board I may be missing something so any help would be greatly appreciated. _____________________________________ /groups.php3

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Thanks for all the help. I found the problem to be in the code supplied with sdk 2.41. Upgrading to 2.5 fixed the problem. I do have one more annoyance. Motorola claims that the DSP56800 series can be used to implement a graphic equalizer for audio using 10 5th order IIR filters at 48kHz. This is why I choose the 56827 DSP. Sampling in mono at 8kHz I don't have enough time to run 5 2nd order IIR filters. I must be doing something wrong. This is what I'm doing: Read 1 sample Perform filtering Write 1 sample Does anyone have any hints? Thanks, James > From: "Michael Hodges" <> > Date: Tue, 18 Jun 2002 21:52:30 +0100 > To: <>, "James Ball" <> > Subject: Re: [motoroladsp] DSP56827 Codec > > Hello James, > > I seem to remember a similar problem with the 56F826EVM some time ago. > Take a look in config.h, (Embedded > SDK\src\dsp56f827evm\nos\config\confih.h),and check the following lines, > > #define CODEC_ISL CODEC_LEFT_INPUT_LINE_1 > #define CODEC_ISR CODEC_RIGHT_INPUT_LINE_1 > > I seem to remember they wrongly configured the codec for line 2 and the > audio input is connected to line 1. > If it says LINE_2, change the 2 to a 1 and it should work. > > Regards, > > Mick Hodges > > > ----- Original Message ----- > From: "James Ball" <> > To: <> > Sent: Saturday, June 15, 2002 3:13 PM > Subject: [motoroladsp] DSP56827 Codec > I¹m working on a project for school and have been giving a DSP56827. I¹ve > installed the Motorola SDK 2.41 and have tried to run the Codec sample > project that came with the SDK through CodeWarrior, but it will not work. I > have probed all the data lines around the codec (clock, sync and data to the > DSP) and they seem to be working correctly but the DSP cannot read or write > any data. It looks like there is a problem with either the software or the > DSP itself. I can download and test some other sample programs such as the > quad timer, but again I¹m unable to send and receive serial data through the > SCI port using the sample code. I find it hard to believe that part of the > DSP isn¹t working, but I also find it hard to believe that the sample code > given by Motorola doesn¹t work either. > > As I am new to this board I may be missing something so any help would be > greatly appreciated. > > > _____________________________________ > /groups.php3

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