From 3b3e7bd8af72790c08277b1e11ccec3ea769ac06 Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Fri, 3 May 2002 13:13:54 +0000
Subject: First sound check

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@410 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/test/i2c/main.c | 87 +++++++++++++++++++++++++++++++++++-------------
 1 file changed, 64 insertions(+), 23 deletions(-)

diff --git a/firmware/test/i2c/main.c b/firmware/test/i2c/main.c
index 825de73788..746f1c7355 100644
--- a/firmware/test/i2c/main.c
+++ b/firmware/test/i2c/main.c
@@ -21,13 +21,49 @@
 #include "sh7034.h"
 #include "debug.h"
 
-extern char mp3data[];
-extern int mp3datalen;
+unsigned char fliptable[] =
+{
+    0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 
+    0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 
+    0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 
+    0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 
+    0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 
+    0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 
+    0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 
+    0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 
+    0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 
+    0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 
+    0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 
+    0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 
+    0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 
+    0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 
+    0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 
+    0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 
+    0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 
+    0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 
+    0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 
+    0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 
+    0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 
+    0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 
+    0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 
+    0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 
+    0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 
+    0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 
+    0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 
+    0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 
+    0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 
+    0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 
+    0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 
+    0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
+};
 
-unsigned char *mp3dataptr;
+extern unsigned char mp3data[];
+extern int mp3datalen;
 
 void setup_sci0(void)
 {
+    PBCR1 = (PBCR1 & 0xccff) | 0x0200;
+    
     /* set PB12 to output */
     PBIOR |= 0x1000;
 
@@ -62,7 +98,7 @@ void setup_sci0(void)
     IPRB = 0;
     
     /* Enable Tx (only!) */
-    SCR0 = 0x20;
+    SCR0 |= 0x20;
 }
 
 int mas_tx_ready(void)
@@ -156,6 +192,14 @@ int main(void)
 
    debugf("Register 0xaa: %x\n", i);
 
+   i=mas_readreg(0xed);
+   if (i < 0) {
+       debugf("Error - mas_readreg(ed) returned %d\n", i);
+       while(1);
+   }
+
+   debugf("Register 0xed: %x\n", i);
+
    i=mas_writereg(0x3b, 0x20);
    if (i < 0) {
        debugf("Error - mas_writereg() returned %d\n", i);
@@ -171,26 +215,23 @@ int main(void)
    
    setup_sci0();
 
-   mp3dataptr = mp3data;
    i = 0;
-   
+
    while(1)
    {
+       /* Demand pin high? */
        if(PBDR & 0x4000)
        {
-	   if(i < mp3datalen)
-	   {
-	       while(!mas_tx_ready()){};
-	       /*
-		* Write data into TDR and clear TDRE
-		*/
-	       TDR0 = mp3dataptr[i++];
-	       SSR0 &= ~SCI_TDRE;
-	   }
-       }
-       else
-       {
-	   debugf("MAS not ready\n");
+           /* More data to write? */
+           if(i < mp3datalen)
+           {
+               /* Transmitter ready? */
+               while(!mas_tx_ready()){};
+               
+                /* Write data into TDR and clear TDRE */
+               TDR0 = fliptable[mp3data[i++]];
+               SSR0 &= ~SCI_TDRE;
+           }
        }
    }
    
@@ -201,8 +242,8 @@ extern const void stack(void);
 
 const void* vectors[] __attribute__ ((section (".vectors"))) = 
 {
-   main,	/* Power-on reset */
-   stack,	/* Power-on reset (stack pointer) */
-   main,	/* Manual reset */
-   stack	/* Manual reset (stack pointer) */
+   main,    /* Power-on reset */
+   stack,   /* Power-on reset (stack pointer) */
+   main,    /* Manual reset */
+   stack    /* Manual reset (stack pointer) */
 };
-- 
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