1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 Andrew Ryabinin
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include "kernel.h"
#include "i2c-rk27xx.h"
#include "pca9555.h"
static struct semaphore pca9555_sem;
static char pca9555_thread_stack[DEFAULT_STACK_SIZE];
volatile unsigned short pca9555_in_ports;
void INT_GPIO1(void)
{
if (GPIO1_ISR & (1<<10)) { /* GPIO F2 pin */
GPIO_IEF &= ~(1<<2);
GPIO_ICF |= (1<<2);
semaphore_release(&pca9555_sem);
}
}
static void pca9555_read_thread(void)
{
while(1) {
if ((GPIO_PFDR&(1<<2)) == 0) {
pca9555_in_ports = pca9555_read_input();
} else {
pca9555_in_ports = (1<<15)|(1<<11); /* restore defaults */
}
sleep(HZ/20);
GPIO_IEF |= (1<<2);
semaphore_wait(&pca9555_sem, TIMEOUT_BLOCK);
}
}
static void pca9555_ports_init(void)
{
unsigned short data = 0;
data = 0xf800; /* port0 - pins 0-7 output, port1 - pins 0-2 output, pins 3-7 input */
pca9555_write_config(data, 0xffff);
/*
* IO0-7 IO0-6 IO0-5 IO0_4 IO0_3 IO0_2 IO0_1 IO0_0
* USB_SEL KP_LED POP DAC_EN AMP_EN SPI_CS SPI_CLK SPI_DATA
* 1:MSD 1:OFF 1 0 0 1 1 1
*/
data = ((1<<7)|(1<<6)|(1<<5)|(0<<4)|(0<<3)|(1<<2)|(1<<1)|(1<<0));
/*
* IO1-2 IO1_1 IO1_0
* CHG_EN DAC_EN DF1704_CS
* 1 0 1
*/
data |= ((1<<10)|(0<<9)|(1<<8));
pca9555_write_output(data, 0xffff);
pca9555_in_ports = pca9555_read_input();
}
void pca9555_target_init(void)
{
GPIO_PFCON &= ~(1<<2); /* PF2 for PCA9555 input INT */
pca9555_ports_init();
semaphore_init(&pca9555_sem, 1, 0);
INTC_IMR |= IRQ_ARM_GPIO1;
INTC_IECR |= IRQ_ARM_GPIO1;
GPIO_ISF |= (1<<2);
create_thread(pca9555_read_thread,
pca9555_thread_stack,
sizeof(pca9555_thread_stack),
0,
"pca9555_read" IF_PRIO(, PRIORITY_SYSTEM)
IF_COP(, CPU));
}
|
