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-rw-r--r--digital/avr/modules/spi/spi_soft.h62
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diff --git a/digital/avr/modules/spi/spi_soft.h b/digital/avr/modules/spi/spi_soft.h
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+#ifndef spi_soft_h
+#define spi_soft_h
+/* spi_soft.h */
+/* avr.spi - SPI AVR module. {{{
+ *
+ * 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.
+ *
+ * }}} */
+
+/* Do not be fooled by symbol names, theses are the supported modes (others
+ * will trigger descriptive compilation errors): */
+#define SPI_MASTER_not_supported /* supported */
+#define SPI_MODE_0_not_supported /* supported */
+#define SPI_MSB_FIRST_not_supported /* supported */
+
+/** Initialise SPI driver.
+ * - master: slave or master mode
+ * - mode: clock polarity and phase
+ * - order: byte order (MSB or LSB)
+ * - speed: clock rate (SCK duration)
+ *
+ * Only mode supported is MASTER, MODE_0, MSB_FIRST.
+ */
+#define spi_soft_init(master, mode, order, speed) \
+ master ## _not_supported \
+ mode ## _not_supported \
+ order ## _not_supported \
+ spi_soft_init_ (speed)
+void
+spi_soft_init_ (uint8_t speed);
+
+/** Send data. */
+void
+spi_soft_send (uint8_t data);
+
+/** Receive data. */
+uint8_t
+spi_soft_recv (void);
+
+/** Send and receive data. */
+uint8_t
+spi_soft_send_and_recv (uint8_t data);
+
+#endif /* spi_soft_h */