/* gpio.c */ /* dev2 - Multi-purpose development board using USB and Ethernet. {{{ * * Copyright (C) 2013 Nicolas Schodet * * APBTeam: * Web: http://apbteam.org/ * Email: team AT apbteam DOT org * * 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 program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * }}} */ #include "common.h" #include "io.h" #include "gpio.h" #include "descriptors.h" #include "modules/usb/usb.h" void gpio_init (void) { PORTD = 0; DDRD = 0; } void gpio_uninit (void) { gpio_init (); } void gpio_task (void) { Endpoint_SelectEndpoint (GPIO_RX_EPNUM); /* If data is available from USB: */ if (Endpoint_ReadWriteAllowed ()) { /* Read as much as possible, and clear endpoint. */ do { Endpoint_Discard_Byte (); } while (Endpoint_ReadWriteAllowed ()); Endpoint_ClearCurrentBank (); /* Now, print current GPIO state if possible. */ Endpoint_SelectEndpoint (GPIO_TX_EPNUM); if (Endpoint_ReadWriteAllowed ()) { uint8_t i, pin; pin = PIND; for (i = 0; i < 8; i++) { Endpoint_Write_Byte (pin & 0x80 ? '1' : '0'); pin <<= 1; } Endpoint_Write_Byte ('\r'); Endpoint_ClearCurrentBank (); } } }