topic Re: NGX lpc4330 xplorer board Mp3 decoder Integrartion in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/NGX-lpc4330-xplorer-board-Mp3-decoder-Integrartion/m-p/569794#M18011 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by bavarian on Mon Mar 10 14:58:51 MST 2014</STRONG><BR /><SPAN>As there is no way of implementing a display application with the Xplorer board, there is no internet radio implementation for it. Also there is most likley not enough SRAM to realize the buffers for the MP3 audio data from a radio station.</SPAN><BR /><BR /><SPAN>But there is nothing against implementing an MP3 decoder like libmad or Helix on the LPC4330.</SPAN><BR /><SPAN>As this flashless version of the LPC4300 has lot of internal SRAM, the decoder functions can run from there.</SPAN><BR /><SPAN>For an execution from SPIFI this memory interface is to slow when it comes to the decoder functions, MP3 files with 32kbps were decoded, but 64kbps had already problems.</SPAN><BR /><BR /><BR /><SPAN>I implemented for test purposes the internet radio on the LPC4350:</SPAN><BR /><SPAN>- the complete M0 job executed from SPIFI</SPAN><BR /><SPAN>- the M4 job mainly executed from internal SRAM, some functions like file system and ID3 stuff were executed from SPIFI</SPAN><BR /><SPAN>- the images for the M0 and the M4 were linked to memory areas in the qSPI flash, after reset most of the M4 code gets relocated to the internal SRAM</SPAN><BR /><BR /><SPAN>Currently I have no idea why your code has problems with the assembler routines, but it should be possible to jump into the assembler routine using the assembler window of the debugger.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:54:56 GMT lpcware 2016-06-15T18:54:56Z NGX lpc4330 xplorer board Mp3 decoder Integrartion https://community.nxp.com/t5/LPC-Microcontrollers/NGX-lpc4330-xplorer-board-Mp3-decoder-Integrartion/m-p/569793#M18010 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by praveen.9123 on Tue Mar 04 02:43:01 MST 2014</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN> Is there any Internet Radio demo support for LPCexpresso. I am working on ngx lpc4330 xplorer board where i am integrating mp3decoder.</SPAN><BR /><SPAN>I have integrated mp3 decoder to my Project, when the decoder is calling an assembly code the core is hanging(that means, Return from the assembly code is not happened ---&gt; checked through debugging. The assembly code&nbsp; for MULSHIFT32, CLZ, FASTABS instruction where hanging took place, which is there in the following attachment related mp3decoder ).</SPAN><BR /><SPAN> I need the decoder which supports for cortex-M4, Please help-me I have struck&nbsp; from an week.</SPAN><P><STRONG>Original Attachment has been moved to: <A _jive_internal="true" href="https://community.nxp.com/docs/DOC-338022">asmmis_s.odt</A></STRONG></P></BODY></HTML> Wed, 15 Jun 2016 18:54:55 GMT https://community.nxp.com/t5/LPC-Microcontrollers/NGX-lpc4330-xplorer-board-Mp3-decoder-Integrartion/m-p/569793#M18010 lpcware 2016-06-15T18:54:55Z Re: NGX lpc4330 xplorer board Mp3 decoder Integrartion https://community.nxp.com/t5/LPC-Microcontrollers/NGX-lpc4330-xplorer-board-Mp3-decoder-Integrartion/m-p/569794#M18011 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by bavarian on Mon Mar 10 14:58:51 MST 2014</STRONG><BR /><SPAN>As there is no way of implementing a display application with the Xplorer board, there is no internet radio implementation for it. Also there is most likley not enough SRAM to realize the buffers for the MP3 audio data from a radio station.</SPAN><BR /><BR /><SPAN>But there is nothing against implementing an MP3 decoder like libmad or Helix on the LPC4330.</SPAN><BR /><SPAN>As this flashless version of the LPC4300 has lot of internal SRAM, the decoder functions can run from there.</SPAN><BR /><SPAN>For an execution from SPIFI this memory interface is to slow when it comes to the decoder functions, MP3 files with 32kbps were decoded, but 64kbps had already problems.</SPAN><BR /><BR /><BR /><SPAN>I implemented for test purposes the internet radio on the LPC4350:</SPAN><BR /><SPAN>- the complete M0 job executed from SPIFI</SPAN><BR /><SPAN>- the M4 job mainly executed from internal SRAM, some functions like file system and ID3 stuff were executed from SPIFI</SPAN><BR /><SPAN>- the images for the M0 and the M4 were linked to memory areas in the qSPI flash, after reset most of the M4 code gets relocated to the internal SRAM</SPAN><BR /><BR /><SPAN>Currently I have no idea why your code has problems with the assembler routines, but it should be possible to jump into the assembler routine using the assembler window of the debugger.</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:54:56 GMT https://community.nxp.com/t5/LPC-Microcontrollers/NGX-lpc4330-xplorer-board-Mp3-decoder-Integrartion/m-p/569794#M18011 lpcware 2016-06-15T18:54:56Z