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authorNélio Laranjeiro2008-02-10 23:07:45 +0100
committerNélio Laranjeiro2008-02-10 23:07:45 +0100
commit4d10e19afe45695f30e7bf408757e92893f3fd2c (patch)
treeb3db06961e5b8fd4e5b5731bac767bddd90efe11 /digital/avr/modules/spi/test/spi_host.c
parentc55b86e84af4efefb72b439d2041d11bb9349bc6 (diff)
SPI driver for AVR.
It's only a first shoot, it has not been tested in the real AVR.
Diffstat (limited to 'digital/avr/modules/spi/test/spi_host.c')
-rw-r--r--digital/avr/modules/spi/test/spi_host.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/digital/avr/modules/spi/test/spi_host.c b/digital/avr/modules/spi/test/spi_host.c
new file mode 100644
index 00000000..9badb9bd
--- /dev/null
+++ b/digital/avr/modules/spi/test/spi_host.c
@@ -0,0 +1,107 @@
+/* spi_host.c */
+/* avr.spi - SPI AVR module. {{{
+ *
+ * Copyright (C) 2008 Nélio Laranjeiro
+ *
+ * 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 <stdint.h>
+#include "io.h"
+#include "common.h"
+#include "modules/proto/proto.h"
+#include "modules/spi/spi.h"
+
+/** Spi driver context. */
+static spi_t spi_global;
+
+#ifdef HOST
+static volatile uint8_t SPCR;
+static volatile uint8_t SPDR;
+static volatile uint8_t SPSR;
+#endif
+
+/** Initialise the SPI Control Register.
+ * \param sprc the sprc register data to be store in the register.
+ * \param cb the function call back to call the user which receive the data.
+ * \param user_data the user data to be provieded in the function call back.
+ */
+void
+spi_init(uint8_t sprc, spi_recv_cb_t cb, void *user_data)
+{
+ SPCR = sprc;
+ spi_global.recv_cb = cb;
+ spi_global.recv_user_data = user_data;
+}
+
+/** Uninitialise the SPI module.
+ * Unused on the target
+ */
+void
+spi_uninit (void)
+{
+}
+
+/** Send a data to the Slave.
+ * \param data the data to send
+ * \param length the length of the data in bytes.
+ */
+void
+spi_send(uint8_t *data, u8 length)
+{
+ uint8_t i;
+
+ for ( i = 0; i < length; i++)
+ {
+ proto_send0 (data[i]);
+ }
+}
+
+/** Receive a data from the SPI bus.
+ * \return the data received from the bus.
+ */
+uint8_t
+spi_recv(void)
+{
+ return SPDR;
+}
+
+/** Return the status register from the SPI driver.
+ * \return the status register value
+ */
+uint8_t
+spi_status(void)
+{
+ return SPSR;
+}
+
+/** Function called by the interruption if an IT is requested.
+ *
+ */
+void
+spi_catch_it(void)
+{
+ // call the call back.
+ (*spi_global.recv_cb) (spi_global.recv_user_data);
+}
+
+void
+proto_callback (uint8_t cmd, uint8_t size, uint8_t *args)
+{
+}