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I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. |
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SPI between DSP56F801 and DSP56F805
Started by ●October 23, 2002
Reply by ●October 23, 20022002-10-23
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For this type of question, you should include code fragments or complete
files from your program. Without them, we cannot see what is wrong in your program. For information about initializing the SPI, please see my message "RE: [motoroladsp] 56F807's SPI can't access X5043" that was posted to this discussion group on September 5, 2002, at about 8:20am. Please note that this message shows the Master mode only, but the Slave mode will be similar except the SPI Master Bit (SPMSTR, bit 4) in the SPI Status and Control Register (SPSCR) will be 0. Please see Section 13.9.1 "SPI Status and Control Register (SPSCR)" in the DSP56F80x User's Manual. You also need to make sure that the Clock Polarity Bit (CPOL, bit 3) and the Clock Phase Bit (CPHA, bit 2) in the SPI Status and Control Register (SPSCR) are set the same in both of your programs. Also, you should read Section 13.8.2 "Transmission Formats" in the DSP56F80x User's Manual. From the description of your problem, it sounds like the CPHA bit is the wrong value in the Slave (DSP801) system. I hope this helps, please send additional information if you are still having a problem. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: grdeathsa [mailto:] Sent: Wednesday, October 23, 2002 12:02 AM To: Subject: [motoroladsp] SPI between DSP56F801 and DSP56F805 I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
Reply by ●October 23, 20022002-10-23
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I agree with what Art has posted in his reply. Also, you will need to check errata for both chips. Earlier versions of the silicon had SPI errata that was fixed in the production parts. Also, radegast that you are using is not supported product by Motorola for DSP56800/800E parts, and it has very limited user base. So I would be very surprised to see anyone in this newsgroup with any knowledge of it (with exception of few internal Motorola developers). If you have radegast question, you should go directly to the person who gave you the software. Since you are not using SDK, I would recommend for you at least look at the SDK for DSP56800/800E SPI driver code. Implementation of this driver compensated for earlier HW errata, so that if you use SDK SPI driver, you would not notice existing HW problems. Sincerely, Leonard N. Elevich Motorola DSPO -----Original Message----- From: grdeathsa [mailto:] Sent: Wednesday, October 23, 2002 12:02 AM To: Subject: [motoroladsp] SPI between DSP56F801 and DSP56F805 I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
Reply by ●October 23, 20022002-10-23
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You may want to check the errata for the chips. I believe there is still
an errata for slave mode. Plus, if you have an earlier rev part, there were some significant problems with the SPI. -----Original Message----- From: grdeathsa [mailto:] Sent: Wednesday, October 23, 2002 12:02 AM To: Subject: [motoroladsp] SPI between DSP56F801 and DSP56F805 I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
Reply by ●October 25, 20022002-10-25
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Please look at the example code for the SPI Master application I have
attached. This is from the DSP56F805 SDK directory at: ...\src\dsp56805evm\nos\applications\spi Please note that "..." is the directory where you installed the SDK (C:\Development\DSP568xx\Moto_SDK in our systems here). The parameter "SpiParams.bSetAsMaster" must be set to 1 for the Master, and it must be set to 0 for the Slave. The SPI ports of the 2 systems must be connected according to Figure 13-3 "Full-Duplex Master-Slave Connections" in the DSP56F80x User's Manual. You should also add the following ioctl calls in both programs (please note that the File Descriptor returned by the open() call is named "SerialMaster" in the Master program, and it is named "SerialSlave" in the Slave program): In the Master: ioctl(SerialMaster,SPI_MODE_MASTER,NULL); ioctl(SerialMaster,SPI_DATA_SHIFT_MSB_FIRST,NULL); ioctl(SerialMaster,SPI_MODE_FAULT_DISABLE,NULL); ioctl(SerialMaster,SPI_CLK_POL_FALLING_EDGE,NULL); ioctl(SerialMaster,SPI_CLOCK_PHASE_SET,NULL); In the Slave: ioctl(SerialSlave,SPI_MODE_SLAVE,NULL); ioctl(SerialSlave,SPI_DATA_SHIFT_MSB_FIRST,NULL); ioctl(SerialSlave,SPI_MODE_FAULT_DISABLE,NULL); ioctl(SerialSlave,SPI_CLK_POL_FALLING_EDGE,NULL); ioctl(SerialSlave,SPI_CLOCK_PHASE_SET,NULL); There is documentation for the SPI Driver in the on-line manual, start it as follows: Start Programs Motorola Embedded SDK 2.5 Help and Documentation In "Contents", go to: Motorola Embedded SDK Software Solutions Targeting DSP568xx Platforms DSP56826/827 Platform 5 On-Chip Drivers 5.1 SPI Driver 5.1.4 SPI Device Independent I/O API Specifications 5.1.4.5 ioctl Also please look at Example 5-2 "SPI Driver Usage" on the second page of the ioctl description. This information should get your SPI ports communicating with each other. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: Frikkie Marais [mailto:] Sent: Wednesday, October 23, 2002 11:02 PM To: Art Johnson Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Art Sorry about that I made sure this time that the file's are there now. I will have a look also to do this in SDK. Only problem is SDK has to many files that need to be viewed to do a little example or a big one. Frikkie -----Original Message----- From: Art Johnson [mailto:] Sent: 23 October 2002 16:40 To: Frikkie Marais Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Frikkie There was not any attachment with your message, please send me the file(s) you would like me to look at. Regards, Art -----Original Message----- From: Frikkie Marais [mailto:] Sent: Wednesday, October 23, 2002 6:21 AM To: Art Johnson Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Art Here is some of the code that I have writen very basic. Hope that you realy can help me. Thanks. -----Original Message----- From: Art Johnson [mailto:] Sent: 23 October 2002 15:04 To: grdeathsa; Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 For this type of question, you should include code fragments or complete files from your program. Without them, we cannot see what is wrong in your program. For information about initializing the SPI, please see my message "RE: [motoroladsp] 56F807's SPI can't access X5043" that was posted to this discussion group on September 5, 2002, at about 8:20am. Please note that this message shows the Master mode only, but the Slave mode will be similar except the SPI Master Bit (SPMSTR, bit 4) in the SPI Status and Control Register (SPSCR) will be 0. Please see Section 13.9.1 "SPI Status and Control Register (SPSCR)" in the DSP56F80x User's Manual. You also need to make sure that the Clock Polarity Bit (CPOL, bit 3) and the Clock Phase Bit (CPHA, bit 2) in the SPI Status and Control Register (SPSCR) are set the same in both of your programs. Also, you should read Section 13.8.2 "Transmission Formats" in the DSP56F80x User's Manual. From the description of your problem, it sounds like the CPHA bit is the wrong value in the Slave (DSP801) system. I hope this helps, please send additional information if you are still having a problem. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: grdeathsa [mailto:] Sent: Wednesday, October 23, 2002 12:02 AM To: Subject: [motoroladsp] SPI between DSP56F801 and DSP56F805 I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ | |||
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Reply by ●October 28, 20022002-10-28
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Thanks Art for all your help but I found out that the buardrate on the
801 was out the value that they got was to low so I inserted the value manualy. Frikkie. -----Original Message----- From: Art Johnson [mailto:] Sent: 25 October 2002 14:36 To: Frikkie Marais; Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Please look at the example code for the SPI Master application I have attached. This is from the DSP56F805 SDK directory at: ...\src\dsp56805evm\nos\applications\spi Please note that "..." is the directory where you installed the SDK (C:\Development\DSP568xx\Moto_SDK in our systems here). The parameter "SpiParams.bSetAsMaster" must be set to 1 for the Master, and it must be set to 0 for the Slave. The SPI ports of the 2 systems must be connected according to Figure 13-3 "Full-Duplex Master-Slave Connections" in the DSP56F80x User's Manual. You should also add the following ioctl calls in both programs (please note that the File Descriptor returned by the open() call is named "SerialMaster" in the Master program, and it is named "SerialSlave" in the Slave program): In the Master: ioctl(SerialMaster,SPI_MODE_MASTER,NULL); ioctl(SerialMaster,SPI_DATA_SHIFT_MSB_FIRST,NULL); ioctl(SerialMaster,SPI_MODE_FAULT_DISABLE,NULL); ioctl(SerialMaster,SPI_CLK_POL_FALLING_EDGE,NULL); ioctl(SerialMaster,SPI_CLOCK_PHASE_SET,NULL); In the Slave: ioctl(SerialSlave,SPI_MODE_SLAVE,NULL); ioctl(SerialSlave,SPI_DATA_SHIFT_MSB_FIRST,NULL); ioctl(SerialSlave,SPI_MODE_FAULT_DISABLE,NULL); ioctl(SerialSlave,SPI_CLK_POL_FALLING_EDGE,NULL); ioctl(SerialSlave,SPI_CLOCK_PHASE_SET,NULL); There is documentation for the SPI Driver in the on-line manual, start it as follows: Start Programs Motorola Embedded SDK 2.5 Help and Documentation In "Contents", go to: Motorola Embedded SDK Software Solutions Targeting DSP568xx Platforms DSP56826/827 Platform 5 On-Chip Drivers 5.1 SPI Driver 5.1.4 SPI Device Independent I/O API Specifications 5.1.4.5 ioctl Also please look at Example 5-2 "SPI Driver Usage" on the second page of the ioctl description. This information should get your SPI ports communicating with each other. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: Frikkie Marais [mailto:] Sent: Wednesday, October 23, 2002 11:02 PM To: Art Johnson Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Art Sorry about that I made sure this time that the file's are there now. I will have a look also to do this in SDK. Only problem is SDK has to many files that need to be viewed to do a little example or a big one. Frikkie -----Original Message----- From: Art Johnson [mailto:] Sent: 23 October 2002 16:40 To: Frikkie Marais Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Frikkie There was not any attachment with your message, please send me the file(s) you would like me to look at. Regards, Art -----Original Message----- From: Frikkie Marais [mailto:] Sent: Wednesday, October 23, 2002 6:21 AM To: Art Johnson Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 Hi Art Here is some of the code that I have writen very basic. Hope that you realy can help me. Thanks. -----Original Message----- From: Art Johnson [mailto:] Sent: 23 October 2002 15:04 To: grdeathsa; Subject: RE: [motoroladsp] SPI between DSP56F801 and DSP56F805 For this type of question, you should include code fragments or complete files from your program. Without them, we cannot see what is wrong in your program. For information about initializing the SPI, please see my message "RE: [motoroladsp] 56F807's SPI can't access X5043" that was posted to this discussion group on September 5, 2002, at about 8:20am. Please note that this message shows the Master mode only, but the Slave mode will be similar except the SPI Master Bit (SPMSTR, bit 4) in the SPI Status and Control Register (SPSCR) will be 0. Please see Section 13.9.1 "SPI Status and Control Register (SPSCR)" in the DSP56F80x User's Manual. You also need to make sure that the Clock Polarity Bit (CPOL, bit 3) and the Clock Phase Bit (CPHA, bit 2) in the SPI Status and Control Register (SPSCR) are set the same in both of your programs. Also, you should read Section 13.8.2 "Transmission Formats" in the DSP56F80x User's Manual. From the description of your problem, it sounds like the CPHA bit is the wrong value in the Slave (DSP801) system. I hope this helps, please send additional information if you are still having a problem. Regards, Art Johnson Senior Systems Analyst PMC Prime Mover Controls Inc. 3600 Gilmore Way Burnaby, B.C., Canada V5G 4R8 Phone: 604 433-4644 FAX: 604 433-5570 Email: http://www.pmc-controls.com -----Original Message----- From: grdeathsa [mailto:] Sent: Wednesday, October 23, 2002 12:02 AM To: Subject: [motoroladsp] SPI between DSP56F801 and DSP56F805 I set up two evalution boards of motorola one with DSP801 and the other DSP805 witch is the master the other the slave. But the two boards do not what to communicate seems that the data is going out correctly but the 801 seems to start putting the data in at the wrong clock cycle. I checked the board rate and the two match. I am developing in radegast v 2.0. Can any body please send me some hints what could be wrong or example code. _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: To Post: To Leave: Archives: http://www.yahoogroups.com/group/motoroladsp More Groups: http://www.dsprelated.com/groups.php3 ">http://docs.yahoo.com/info/terms/ |
