devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

simplification of lcd driver code - based on patch #5474 by Rani Hod

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10235 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Christian Gmeiner 2006-07-18 18:16:38 +00:00
parent 19f8ae7609
commit a59b3eb919
1 changed files with 15 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

27
firmware/target/coldfire/iaudio/x5/lcd-x5.c
View file

@ -32,6 +32,9 @@
static bool display_on=false; /* is the display turned on? */
#define LCD_CMD *(volatile unsigned short *)0xf0008000
#define LCD_DATA *(volatile unsigned short *)0xf0008002
/* register defines for the Renesas HD66773R */
#define R_HORIZ_RAM_ADDR_POS 0x16
#define R_VERT_RAM_ADDR_POS 0x17
@ -91,17 +94,17 @@ const short high8to9[] ICONST_ATTR = {
/* called very frequently - inline! */
inline void lcd_write_reg(int reg, int val)
{
*(volatile unsigned short *)0xf0008000 = (reg >> 8) << 1;
*(volatile unsigned short *)0xf0008000 = (reg & 0xff) << 1;
*(volatile unsigned short *)0xf0008002 = (val >> 8) << 1;
*(volatile unsigned short *)0xf0008002 = (val & 0xff) << 1;
LCD_CMD = (reg >> 8) << 1;
LCD_CMD = (reg & 0xff) << 1;
LCD_DATA = (val >> 8) << 1;
LCD_DATA = (val & 0xff) << 1;
}
/* called very frequently - inline! */
inline void lcd_begin_write_gram(void)
{
*(volatile unsigned short *)0xf0008000 = (R_WRITE_DATA_2_GRAM >> 8) << 1;
*(volatile unsigned short *)0xf0008000 = (R_WRITE_DATA_2_GRAM & 0xff) << 1;
LCD_CMD = (R_WRITE_DATA_2_GRAM >> 8) << 1;
LCD_CMD = (R_WRITE_DATA_2_GRAM & 0xff) << 1;
}
/* called very frequently - inline! */
@ -119,16 +122,16 @@ inline void lcd_write_data(const unsigned short* p_bytes, int count)
count >>= 1;
while(count--) {
tmp = *ptr++;
*(volatile unsigned short *)0xf0008002 = high8to9[tmp >> 24];
*(volatile unsigned short *)0xf0008002 = tmp>>15;
*(volatile unsigned short *)0xf0008002 = high8to9[(tmp >> 8)&255];
*(volatile unsigned short *)0xf0008002 = tmp<<1;
LCD_DATA = high8to9[tmp >> 24];
LCD_DATA = tmp>>15;
LCD_DATA = high8to9[(tmp >> 8)&255];
LCD_DATA = tmp<<1;
}
if(extra) {
/* the final "spare" pixel */
unsigned short read = *(unsigned short *)ptr;
*(volatile unsigned short *)0xf0008002 = high8to9[read >> 8];
*(volatile unsigned short *)0xf0008002 = read<<1;
LCD_DATA = high8to9[read >> 8];
LCD_DATA = read<<1;
}
}