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-rw-r--r--digital/dev2/src/common/gpio.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/digital/dev2/src/common/gpio.c b/digital/dev2/src/common/gpio.c
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+++ b/digital/dev2/src/common/gpio.c
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+/* 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 ();
+ }
+ }
+}
+