From 450c3e00a16c3d8bf1a9282d2ca4b45e8b4d9045 Mon Sep 17 00:00:00 2001 From: Karl Palsson Date: Mon, 18 Jun 2012 18:57:45 +0000 Subject: Basic helper routines for CRC Note, the CRC block is pretty useless for interoperability. It only operates on 32bit chunks, and in a different bit order. No attempt to make full helpers for compatibility with other implementations has been done. https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=%2Fpublic%2FSTe2ecommunities%2Fmcu%2FLists%2Fcortex_mx_stm32%2FCRC%20computation&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B¤tviews=2006 --- include/libopencm3/stm32/crc.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/libopencm3') diff --git a/include/libopencm3/stm32/crc.h b/include/libopencm3/stm32/crc.h index 6ae4085..7d80259 100644 --- a/include/libopencm3/stm32/crc.h +++ b/include/libopencm3/stm32/crc.h @@ -55,4 +55,24 @@ /* TODO */ +/** + * Reset the CRC calculator to initial values. + */ +void crc_reset(void); + +/** + * Add a word to the crc calculator and return the result. + * @param data new word to add to the crc calculator + * @return final crc calculator value + */ +u32 crc_calculate(u32 data); + +/** + * Add a block of data to the CRC calculator and return the final result + * @param datap pointer to the start of a block of 32bit data words + * @param size length of data, in 32bit increments + * @return final CRC calculator value + */ +u32 crc_calculate_block(u32 *datap, int size); + #endif -- cgit v1.2.3