95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2013 Andrew Ryabinin
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "kernel.h"
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#include "i2c-rk27xx.h"
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#include "pca9555.h"
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static struct semaphore pca9555_sem;
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static char pca9555_thread_stack[DEFAULT_STACK_SIZE];
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volatile unsigned short pca9555_in_ports;
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void INT_GPIO1(void)
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{
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if (GPIO1_ISR & (1<<10)) { /* GPIO F2 pin */
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GPIO_IEF &= ~(1<<2);
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GPIO_ICF |= (1<<2);
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semaphore_release(&pca9555_sem);
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}
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}
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static void pca9555_read_thread(void)
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{
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while(1) {
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if ((GPIO_PFDR&(1<<2)) == 0) {
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pca9555_in_ports = pca9555_read_input();
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} else {
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pca9555_in_ports = (1<<15)|(1<<11); /* restore defaults */
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}
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sleep(HZ/20);
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GPIO_IEF |= (1<<2);
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semaphore_wait(&pca9555_sem, TIMEOUT_BLOCK);
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}
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}
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static void pca9555_ports_init(void)
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{
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unsigned short data = 0;
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data = 0xf800; /* port0 - pins 0-7 output, port1 - pins 0-2 output, pins 3-7 input */
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pca9555_write_config(data, 0xffff);
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/*
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* IO0-7 IO0-6 IO0-5 IO0_4 IO0_3 IO0_2 IO0_1 IO0_0
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* USB_SEL KP_LED POP DAC_EN AMP_EN SPI_CS SPI_CLK SPI_DATA
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* 1:MSD 1:OFF 1 0 0 1 1 1
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*/
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data = ((1<<7)|(1<<6)|(1<<5)|(0<<4)|(0<<3)|(1<<2)|(1<<1)|(1<<0));
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/*
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* IO1-2 IO1_1 IO1_0
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* CHG_EN DAC_EN DF1704_CS
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* 1 0 1
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*/
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data |= ((1<<10)|(0<<9)|(1<<8));
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pca9555_write_output(data, 0xffff);
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pca9555_in_ports = pca9555_read_input();
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}
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void pca9555_target_init(void)
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{
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GPIO_PFCON &= ~(1<<2); /* PF2 for PCA9555 input INT */
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pca9555_ports_init();
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semaphore_init(&pca9555_sem, 1, 0);
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INTC_IMR |= IRQ_ARM_GPIO1;
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INTC_IECR |= IRQ_ARM_GPIO1;
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GPIO_ISF |= (1<<2);
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create_thread(pca9555_read_thread,
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pca9555_thread_stack,
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sizeof(pca9555_thread_stack),
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0,
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"pca9555_read" IF_PRIO(, PRIORITY_SYSTEM)
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IF_COP(, CPU));
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}
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