altos/stmf0: Add CRC driver

[fw/altos] / src / stmf0 / ao_crc.h

diff --git a/src/stmf0/ao_crc.h b/src/stmf0/ao_crc.h
new file mode 100644 (file)
index 0000000..cd011d3
--- /dev/null
+++ b/src/stmf0/ao_crc.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2015 Keith Packard <keithp@keithp.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#ifndef _AO_CRC_H_
+#define _AO_CRC_H_
+
+#define AO_CRC_16_CCITT                0x1021
+#define AO_CRC_16_CDMA2000     0xc867
+#define AO_CRC_16_DECT         0x0589
+#define AO_CRC_16_T10_DIF      0x8bb7
+#define AO_CRC_16_DNP          0x3d65
+#define AO_CRC_16_ANSI         0x8005
+#define AO_CRC_16_DEFAULT      AO_CRC_16_ANSI
+
+#define AO_CRC_32_ANSI         0x04c11db7
+#define AO_CRC_32_C            0x1edc6f41
+
+#define AO_CRC_32_DEFAULT      AO_CRC_32_ANSI
+
+static inline uint16_t
+ao_crc_in_32_out_16(uint32_t v) {
+       stm_crc.dr.u32 = v;
+       return stm_crc.dr.u16;
+}
+
+static inline uint16_t
+ao_crc_in_16_out_16(uint16_t v) {
+       stm_crc.dr.u16 = v;
+       return stm_crc.dr.u16;
+}
+
+static inline uint16_t
+ao_crc_in_8_out_16(uint8_t v) {
+       stm_crc.dr.u8 = v;
+       return stm_crc.dr.u16;
+}
+
+void
+ao_crc_reset(void);
+
+void
+ao_crc_init(void);
+
+#endif /* _AO_CRC_H_ */