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Diffstat (limited to 'digital/dev2/src/usb_gpio/main.c')
-rw-r--r--digital/dev2/src/usb_gpio/main.c171
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diff --git a/digital/dev2/src/usb_gpio/main.c b/digital/dev2/src/usb_gpio/main.c
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+/* main.c */
+/* dev2 - Multi-purpose development board using USB and Ethernet. {{{
+ *
+ * Copyright (C) 2009 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 "modules/usb/usb.h"
+#include "io.h"
+
+#include <avr/wdt.h>
+
+#include "descriptors.h"
+#include "common/select.h"
+
+HANDLES_EVENT (USB_Connect);
+HANDLES_EVENT (USB_Disconnect);
+HANDLES_EVENT (USB_ConfigurationChanged);
+HANDLES_EVENT (USB_UnhandledControlPacket);
+
+volatile uint8_t usb_connected, usb_configured;
+
+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 ();
+ }
+ }
+}
+
+int
+main (void)
+{
+ /* Disable watchdog if enabled by bootloader/fuses. */
+ MCUSR &= ~(1 << WDRF);
+ wdt_disable ();
+ /* Disable Clock Division. */
+ SetSystemClockPrescaler (0);
+ /* Initialise hardware. */
+ select_init ();
+ /* Initialize USB Subsystem. */
+ USB_Init ();
+ /* Main loop. */
+ while (1)
+ {
+ if (usb_connected)
+ USB_USBTask ();
+ if (usb_configured)
+ {
+ gpio_task ();
+ }
+ }
+}
+
+EVENT_HANDLER (USB_Connect)
+{
+ usb_connected = 1;
+}
+
+EVENT_HANDLER (USB_Disconnect)
+{
+ usb_connected = 0;
+ usb_configured = 0;
+}
+
+EVENT_HANDLER (USB_ConfigurationChanged)
+{
+ /* Setup Rx and Tx Endpoints for the first port. */
+ Endpoint_ConfigureEndpoint (GPIO_TX_EPNUM, EP_TYPE_BULK,
+ ENDPOINT_DIR_IN, GPIO_TX_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+ Endpoint_ConfigureEndpoint (GPIO_RX_EPNUM, EP_TYPE_BULK,
+ ENDPOINT_DIR_OUT, GPIO_RX_EPSIZE,
+ ENDPOINT_BANK_SINGLE);
+ /* Start tasks. */
+ usb_configured = 1;
+}
+
+EVENT_HANDLER (USB_UnhandledControlPacket)
+{
+ /* Process TS specific control requests. */
+ switch (bRequest)
+ {
+ /* Switch back to DFU mode. */
+ case 0:
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_VENDOR |
+ REQREC_DEVICE))
+ {
+ Endpoint_ClearSetupReceived ();
+ /* Send acknowledgement and wait for it to be sent. */
+ Endpoint_ClearSetupIN ();
+ while (!Endpoint_IsSetupINReady ())
+ ;
+ USB_ShutDown ();
+ /* Jump to bootloader. */
+ ((void (*) (void)) 0x3000) ();
+ }
+ break;
+ /* Select output. */
+ case 1:
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_VENDOR |
+ REQREC_DEVICE))
+ {
+ /* Selector parameter. */
+ uint8_t output = Endpoint_Read_Byte ();
+ Endpoint_ClearSetupReceived ();
+ /* Select output. */
+ select_out (output);
+ /* Send acknowledgement. */
+ Endpoint_ClearSetupIN ();
+ }
+ break;
+ /* Set GPIO. */
+ case 0x80:
+ if (bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_VENDOR |
+ REQREC_DEVICE))
+ {
+ /* GPIO parameter. */
+ uint8_t ddr = Endpoint_Read_Byte ();
+ uint8_t port = Endpoint_Read_Byte ();
+ Endpoint_ClearSetupReceived ();
+ /* Set GPIO. */
+ DDRD = ddr;
+ PORTD = port;
+ /* Send acknowledgement. */
+ Endpoint_ClearSetupIN ();
+ }
+ break;
+ }
+}
+