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authorKen Sarkies2012-12-06 03:25:51 +1030
committerKen Sarkies2013-01-08 19:58:18 +1030
commitefee94901a3d587c3168f7340f3797336eb5f0dc (patch)
tree600361a1c659b3e1029bf400bbda988074c718c7 /lib/stm32/common
parente831f4db51f9bd60654a38fd779cf1bf9613ee1a (diff)
CRC moved to common area
Diffstat (limited to 'lib/stm32/common')
-rw-r--r--lib/stm32/common/crc_common_all.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/lib/stm32/common/crc_common_all.c b/lib/stm32/common/crc_common_all.c
new file mode 100644
index 0000000..d65d1b7
--- /dev/null
+++ b/lib/stm32/common/crc_common_all.c
@@ -0,0 +1,82 @@
+/** @addtogroup crc_file
+
+@version 1.0.0
+
+@author @htmlonly &copy; @endhtmlonly 2012 Karl Palsson <karlp@remake.is>
+
+@date 15 October 2012
+
+LGPL License Terms @ref lgpl_license
+ */
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2012 Karl Palsson <karlp@remake.is>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/crc.h>
+
+/**@{*/
+
+/*-----------------------------------------------------------------------------*/
+/** @brief CRC Reset.
+
+Reset the CRC unit and forces the data register to all 1s.
+
+*/
+
+void crc_reset(void)
+{
+ CRC_CR |= CRC_CR_RESET;
+}
+
+/*-----------------------------------------------------------------------------*/
+/** @brief CRC Calculate.
+
+Writes a data word to the register, the write operation stalling until the
+computation is complete.
+
+@param[in] data Unsigned int32.
+@returns int32 Computed CRC result
+*/
+
+u32 crc_calculate(u32 data)
+{
+ CRC_DR = data;
+ // Data sheet says this blocks until it's ready....
+ return CRC_DR;
+}
+
+/*-----------------------------------------------------------------------------*/
+/** @brief CRC Calculate of a Block of Data.
+
+Writes data words consecutively to the register, the write operation stalling
+until the computation of each word is complete.
+
+@param[in] datap Unsigned int32. pointer to an array of 32 bit data words.
+@returns int32 Final computed CRC result
+*/
+
+u32 crc_calculate_block(u32 *datap, int size)
+{
+ int i;
+ for (i = 0; i < size; i++) {
+ CRC_DR = datap[i];
+ }
+ return CRC_DR;
+}
+/**@}*/
+