| /*************************************************************************** |
| * __________ __ ___. |
| * 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 "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)); |
| } |