1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2007 by Jonathan Gordon
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
18 ****************************************************************************/
26 /* Read X, Y, Z1, Z2 touchscreen coordinates. */
27 void tsc2100_read_values(short *x
, short* y
, short *z1
, short *z2
)
29 int page
= 0, address
= 0;
30 unsigned short command
= 0x8000|(page
<< 11)|(address
<< 5);
31 unsigned char out
[] = {command
>> 8, command
& 0xff};
33 spi_block_transfer(SPI_target_TSC2100
,
34 out
, sizeof(out
), in
, sizeof(in
));
36 *x
= (in
[0]<<8)|in
[1];
37 *y
= (in
[2]<<8)|in
[3];
38 *z1
= (in
[4]<<8)|in
[5];
39 *z2
= (in
[6]<<8)|in
[7];
42 short tsc2100_readreg(int page
, int address
)
44 unsigned short command
= 0x8000|(page
<< 11)|(address
<< 5);
45 unsigned char out
[] = {command
>> 8, command
& 0xff};
47 spi_block_transfer(SPI_target_TSC2100
,
48 out
, sizeof(out
), in
, sizeof(in
));
49 return (in
[0]<<8)|in
[1];
53 void tsc2100_writereg(int page
, int address
, short value
)
55 unsigned short command
= (page
<< 11)|(address
<< 5);
56 unsigned char out
[4] = {command
>> 8, command
& 0xff,
57 value
>> 8, value
& 0xff};
58 spi_block_transfer(SPI_target_TSC2100
,
59 out
, sizeof(out
), NULL
, 0);
62 void tsc2100_keyclick(void)
64 // 1100 0100 0001 0000
66 tsc2100_writereg(TSAC2_PAGE
, TSAC2_ADDRESS
, tsc2100_readreg(TSAC2_PAGE
, TSAC2_ADDRESS
)&0x8000);