Andreas Grün
MP3 Player without external hardware MP3 Player without external hardware. A software based MP3 player based on a modified version of libmad. Mono output (at the moment) via AnalogOut. Files are read from an USB drive. This is a demo program, it plays only one file at the moment. Documentation is in "main.cpp" and "config.h"
Diff: lpc1768_mem.cpp
- Revision:
- 2:f28cf0afd021
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc1768_mem.cpp Sat Nov 27 17:27:33 2010 +0000
@@ -0,0 +1,25 @@
+#include "mbed.h"
+#include "config.h"
+
+static char *free_ptr = (char *)AHBMEM;
+static int free_sz = AHBMEMSIZE;
+void reset_ahb_mem(void)
+ {
+ free_ptr = (char *)AHBMEM;
+ free_sz = AHBMEMSIZE;
+ }
+void *mad_malloc(unsigned int sz)
+{
+ unsigned int nsz = ((sz >> 3) + 1) << 3; // align to 8 byte
+ if(nsz < free_sz)
+ {
+ char *p = free_ptr;
+ free_ptr += nsz;
+ free_sz -=nsz;
+ return(p);
+ }
+ else
+ {
+ return(malloc(sz));
+ }
+}