diff options
Diffstat (limited to 'firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c')
| -rw-r--r-- | firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c b/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c index f1e1c24b85..703b7e1307 100644 --- a/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c +++ b/firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c @@ -88,6 +88,7 @@ void lcd_write_command(int byte) GPIOA_PIN(5) = 0; /* Write command */ + /* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */ DBOP_DOUT = (byte << 8) | byte; /* While push fifo is not empty */ @@ -103,6 +104,7 @@ void lcd_write_data(const fb_data* p_bytes, int count) while (count--) { /* Write pixels */ + /* Only bits 15:12 and 3:0 of DBOP_DOUT are meaningful */ DBOP_DOUT = (*p_bytes << 8) | *p_bytes; p_bytes++; /* next packed pixels */ @@ -266,26 +268,30 @@ void lcd_blit_mono(const unsigned char *data, int x, int by, int width, } } +/* Helper function for lcd_grey_phase_blit(). */ +void lcd_grey_data(unsigned char *values, unsigned char *phases, int count); /* Performance function that works with an external buffer note that by and bheight are in 8-pixel units! */ void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases, int x, int by, int width, int bheight, int stride) { - /* TODO */ - -#if 0 if(!display_on) return; -#endif - - (void)values; - (void)phases; - (void)x; - (void)by; - (void)width; - (void)bheight; - (void)stride; + + stride <<= 3; /* 8 pixels per block */ + /* Copy display bitmap to hardware */ + while (bheight--) + { + lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf)); + lcd_write_command (LCD_CNTL_HIGHCOL | (((x+2+xoffset)>>4) & 0xf)); + lcd_write_command (LCD_CNTL_LOWCOL | ((x+2+xoffset) & 0xf)); + + lcd_grey_data(values, phases, width); + + values += stride; + phases += stride; + } } /* Update the display. |