Diff: main.cpp

Revision:

1:ce27bc7b44d4

Parent:

0:1062142e5718

Child:

2:2e03fc4f485b

--- a/main.cpp	Thu Feb 13 01:22:36 2014 +0000
+++ b/main.cpp	Fri Feb 14 06:56:12 2014 +0000
@@ -47,10 +47,23 @@
 MARMEX_OB_oled   oled1( p5, p7,  p20, p16, p15 ); // mosi, sclk, cs, rst, power_control     -- maple-mini-type-b-slot1
 
 
-void init_camera( void )
+SPI         spi( p5, p6, p7 );
+DigitalOut  cs2( p22 );
+DigitalOut  vsync( p9 );
+DigitalOut  camera_reset( p26 );
+
+void init( void )
 {
     I2C     i2c( p28, p27 );
 
+    vsync   = 0;
+    cs2 = 1;
+    camera_reset = 0;
+    wait_ms( 100 );
+    camera_reset = 1;
+    wait_ms( 100 );
+
+
     for ( int i = 0; i < PARAM_NUM; i++ ) {
         i2c.start();
         i2c.write( CAM_I2C_ADDR );
@@ -59,10 +72,13 @@
         i2c.stop();
         wait_ms( 20 );
     }
-}
+    
+    
+    spi.format(8);
+    spi.frequency( 1000000 );
+    vsync   = 0;
 
-SPI         spi( p5, p6, p7 );
-DigitalOut  cs2( p22 );
+}
 
 int send_spi2( char data )
 {
@@ -75,60 +91,106 @@
     return ( tmp );
 }
 
+#define     PREPARE     0x1
+#define     DONE        0x0
+
+void transfer_control( int flag )
+{
+    send_spi2( 0x03 );
+    send_spi2( flag );
+    send_spi2( 0x84 );
+
+    while ( (send_spi2( 0x84 ) ^ flag) & 0x1 )
+        ;
+        
+    vsync   = flag ? 0 : 1;
+}
+
+void open_transfer( void )
+{
+    transfer_control( PREPARE );
+}
+
+void close_transfer( void )
+{
+    transfer_control( DONE );
+}
+
+
+void set_address( int address )
+{
+    send_spi2( 0x00 );
+    send_spi2( (address >> 0) & 0xFF );
+    send_spi2( 0x01 );
+    send_spi2( (address >> 8) & 0xFF );
+    send_spi2( 0x02 );
+    send_spi2( (address >> 16) & 0xFF );
+}
+
+#define     PIXEL_PER_LINE  176
+#define     BYTE_PER_PIXEL  2
+#define     BYTE_PER_LINE   (PIXEL_PER_LINE * BYTE_PER_PIXEL)
+
+
+void transfer_a_line( short *p, int line_number, int x_offset, int n_of_pixels )
+{
+    set_address( line_number * BYTE_PER_LINE + x_offset * BYTE_PER_PIXEL);
+
+    for( int x = 0; x < n_of_pixels; x++ )
+        *p++    = (send_spi2( 0xA8 ) << 8) | send_spi2( 0xA8 );
+}
+
+
+#define X_OFFSET    24
+#define Y_OFFSET    8
 
 int main()
 {
+    short   buf[ 128 ];
 
-    int     my_address;
-    short   buf[ 128 ];
-    int     c;
+    oled1.cls();
+
+    short   p[3][ 128 ]    = { { 0xF800 }, {0x07E0}, { 0x001F } };
+
+    for ( int i = 0; i < 128; i++ )
+        p[ 0 ][ i ]   = 0xF800;
+    for ( int i = 0; i < 128; i++ )
+        p[ 1 ][ i ]   = 0x07E0;
+    for ( int i = 0; i < 128; i++ )
+        p[ 2 ][ i ]   = 0x001F;
 
-    cs2 = 1;
-    init_camera();
+    int count   = 0;
+#if 0
+    while ( 1 ) {
+        for ( int i = 0; i < 128; i++ ) {
+            oled1.blit565( 0, i, 128, 1, p[ count % 3 ] );
+        }
+        count++;
+        
+        if ( count == 3 )
+            break;
+    }
+#endif
 
-    spi.format(8);
-    spi.frequency( 1000000 );
-
+    init();
 
     while ( 1 ) {
 
-        send_spi2( 0x03 );
-        send_spi2( 0x01 );
-        send_spi2( 0x84 );
+        open_transfer();
+        printf( "transfer ready\r\n" );
 
-        while ( !(c = send_spi2( 0x00 ) & 0x1) ) {
-            printf( "val = 0x%02X\r\n", c );
+        for ( int line = 0 + Y_OFFSET; line < 128 + Y_OFFSET; line++  ) {
+            transfer_a_line( buf, line, X_OFFSET, 128 );
+           
+            oled1.blit565( 0, line, 128, 1, buf );
         }
 
-        printf( "camera ready\r\n" );
-
-        my_address  = 24 * 2 + 176 * 8 * 2;
-
-        for ( int y = 0; y < 128; y++ ) {
-            send_spi2( 0x00 );
-            send_spi2( (my_address >> 0) & 0xFF );
-            send_spi2( 0x01 );
-            send_spi2( (my_address >> 8) & 0xFF );
-            send_spi2( 0x02 );
-            send_spi2( (my_address >> 16) & 0xFF );
-
-            my_address += 176 * 2;
+        close_transfer();
+        printf( "loop done\r\n" );
 
-            for( int x = 0; x < 128; x++ ) {
-                buf[ x ] = (send_spi2( 0xA8 ) << 8) | send_spi2( 0xA8 );
-            }
-            oled1.blit565( 0, y, 128, 1, buf );
-        }
-
-            send_spi2( 0x03 );
-            send_spi2( 0x00 );
-            send_spi2( 0x84 );
-
-            while ( !(send_spi2( 0x84 ) & 0x1) )
-                ;
-            printf( "loop done\r\n" );
     }
 
+#if 0
     oled1.background( 0x000000 );
     oled1.cls();
 
@@ -164,4 +226,5 @@
         }
         count++;
     }
+#endif
 }