Add load modulation and encoding/decoding code from harald

git-svn-id: https://svn.openpcd.org:2342/trunk@351 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 49 insertions, 0 deletions

diff --git a/openpicc/application/load_modulation.c b/openpicc/application/load_modulation.c
new file mode 100644
index 0000000..976d57f
--- /dev/null
+++ b/openpicc/application/load_modulation.c
@@ -0,0 +1,49 @@
+/* AT91SAM7 PWM routines for OpenPICC
+ * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ *  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 <sys/types.h>
+#include <lib_AT91SAM7.h>
+
+#include "openpicc.h"
+
+void load_mod_level(u_int8_t level)
+{
+	if (level > 3)
+		level = 3;
+
+	if (level & 0x1)
+		AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD1);
+	else
+		AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD1);
+
+	if (level & 0x2)
+		AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD2);
+	else
+		AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD2);
+}
+
+void load_mod_init(void)
+{
+	AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD1);
+	AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD2);
+
+	AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD1);
+	AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPICC_PIO_LOAD2);
+}