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Initial documentation for SPI, I2C and CRC

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This commit is contained in:
Ken Sarkies
2012-10-15 14:34:33 +10:30
committed by Piotr Esden-Tempski
parent c4b7e2a76a
commit 0c779512d6
6 changed files with 730 additions and 3 deletions
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lib/stm32/crc.c
+44 -2
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@@ -1,3 +1,17 @@
/** @defgroup crc_file CRC
@ingroup STM32F_files
@brief <b>libopencm3 STM32Fxxx CRC</b>
@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.
*
@@ -19,11 +33,30 @@
#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;
@@ -31,6 +64,16 @@ u32 crc_calculate(u32 data)
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;
@@ -39,6 +82,5 @@ u32 crc_calculate_block(u32 *datap, int size)
}
return CRC_DR;
}
/**@}*/