Tedd OKANO / SC16IS750

for SC16IS750 test program. Confirming register access method

Files at this revision

API Documentation at this revision

Revision 1:d9a4b7a4a159, committed 2012-07-18

Comitter:
okano
Date:
Wed Jul 18 01:45:38 2012 +0000
Parent:
0:bae17cf3178e
Commit message:
register init access method can be switched by REGISTER_INIT_BY_RESTART; false = STOP-START, true = RESTART

Changed in this revision

SC16IS750.cpp Show annotated file Show diff for this revision Revisions of this file
SC16IS750.h Show annotated file Show diff for this revision Revisions of this file 
--- a/SC16IS750.cpp	Wed Jul 18 01:24:33 2012 +0000
+++ b/SC16IS750.cpp	Wed Jul 18 01:45:38 2012 +0000
@@ -1,8 +1,10 @@
 #include    "mbed.h"
 #include    "SC16IS750.h"
 
-#define XTAL_FREQUENCY          14784000    //  Hz
-#define REGISTER_ACCESS_SIZE    2
+#define XTAL_FREQUENCY              14784000    //  Hz
+#define REGISTER_ACCESS_SIZE        2
+
+#define REGISTER_INIT_BY_RESTART    true
 
 char    init[][ REGISTER_ACCESS_SIZE ] = {
     { SC16IS750::LCR, 0x80 },
@@ -27,17 +29,12 @@
 
     i2c.frequency( 400 * 1000 );
 
-    baud_setting    = XTAL_FREQUENCY / (baud_rate * 16);    
+    baud_setting    = XTAL_FREQUENCY / (baud_rate * 16);
     init[ 1 ][ 1 ]  = (char)baud_setting;
     init[ 2 ][ 1 ]  = (char)(baud_setting >> 8);
-    
+
     init_registers();
-}
-
-void SC16IS750::init_registers( void ) {
-    for ( int i = 0; i <  (sizeof( init ) / REGISTER_ACCESS_SIZE); i++ )
-        i2c.write( i2c_addr, init[ i ], REGISTER_ACCESS_SIZE );
-
+    
     i2c.stop();
 }
 
@@ -45,7 +42,7 @@
     int     baud_setting;
 
     baud_rate   = baud;
-    baud_setting    = XTAL_FREQUENCY / (baud_rate * 16);    
+    baud_setting    = XTAL_FREQUENCY / (baud_rate * 16);
 
     register_write( SC16IS750::LCR, 0x80 );
     register_write( SC16IS750::DLL, (char)baud_setting );
@@ -53,7 +50,12 @@
     register_write( SC16IS750::LCR, 0x03 );
 }
 
-void SC16IS750::send_str( char *s ) {
+void SC16IS750::init_registers( void ) {
+    for ( int i = 0; i <  (sizeof( init ) / REGISTER_ACCESS_SIZE); i++ )
+        i2c.write( i2c_addr, init[ i ], REGISTER_ACCESS_SIZE, REGISTER_INIT_BY_RESTART );
+}
+
+void SC16IS750::send_str( const char *s ) {
     char    buffer[ 65 ];
     int     i   = 1;
 

--- a/SC16IS750.h	Wed Jul 18 01:24:33 2012 +0000
+++ b/SC16IS750.h	Wed Jul 18 01:45:38 2012 +0000
@@ -47,7 +47,7 @@
 
     void init_registers( void );
     void set_baud( int );
-    void send_str( char *s );
+    void send_str( const char *s );
     void register_write( char register_address, char data );
     char register_read( char register_address );