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Code Issues Releases Activity

OP-185 Flight helper functions for the firmware IAP object. Allows setting/clearing of back-up registers

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git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1890 ebee16cc-31ac-478f-84a7-5cbb03baadba
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kokomojoe 2010-10-06 02:02:37 +00:00 committed by kokomojoe
parent 5dae137af0
commit 20c6e2292a
2 changed files with 170 additions and 0 deletions
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122
flight/PiOS/Common/pios_iap.c Normal file
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/*!
* @File iap.c
* @Brief
*
* Created on: Sep 6, 2010
* Author: joe
*/
/****************************************************************************************
* Header files
****************************************************************************************/
#include "openpilot.h"
/****************************************************************************************
* Private Definitions/Macros
****************************************************************************************/
/* these definitions reside here for protection and privacy. */
#define IAP_MAGIC_WORD_1 0x1122
#define IAP_MAGIC_WORD_2 0xAA55
#define IAP_REQLOC_1 BKP_DR1
#define IAP_CRCLOC_LOW BKP_DR2
#define IAP_CRCLOC_UPPER BKP_DR3
#define IAP_PORTLOC BKP_DR4
#define IAP_REQLOC_2 BKP_RR5
#define IAP_UPLOAD_REQ_1 0x20AA
#define IAP_UPLOAD_REQ_2 0x2055
#define IAP_DNLOAD_REQ_1 0x30AA
#define IAP_DNLOAD_REQ_2 0x3055
#define UPPERWORD16(lw) (uint16_t)((uint32_t)(lw)>>16)
#define LOWERWORD16(lw) (uint16_t)((uint32_t)(lw)&0x0000ffff)
#define UPPERBYTE(w) (uint8_t)((w)>>8)
#define LOWERBYTE(w) (uint8_t)((w)&0x00ff)
/****************************************************************************************
* Private Functions
****************************************************************************************/
/****************************************************************************************
* Private (static) Data
****************************************************************************************/
/****************************************************************************************
* Public/Global Data
****************************************************************************************/
/*!
* \brief PIOS_IAP_Init - performs required initializations for iap module.
* \param none.
* \return none.
* \retval none.
*
* Created: Sep 8, 2010 10:10:48 PM by joe
*/
void PIOS_IAP_Init( void )
{
/* Enable CRC clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE);
/* Enable PWR and BKP clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
/* Enable write access to Backup domain */
PWR_BackupAccessCmd(ENABLE);
/* Clear Tamper pin Event(TE) pending flag */
BKP_ClearFlag();
}
/*!
* \brief Determines if an In-Application-Programming request has been made.
* \param *comm - Which communication stream to use for the IAP (USB, Telemetry, I2C, SPI, etc)
* \return TRUE - if correct sequence found, along with 'comm' updated.
* FALSE - Note that 'comm' will have an invalid comm identifier.
* \retval
*
*/
uint32_t PIOS_IAP_CheckRequest( void )
{
uint32_t retval = FALSE;
uint16_t reg1;
uint16_t reg2;
reg1 = BKP_ReadBackupRegister( MAGIC_REG_1 );
reg2 = BKP_ReadBackupRegister( MAGIC_REG_2 );
if( reg1 == IAP_MAGIC_WORD_1 && reg2 == IAP_MAGIC_WORD_2 ) {
// We have a match.
retval = TRUE;
} else {
retval = FALSE;
}
return retval;
}
/*!
* \brief Sets the 1st word of the request sequence.
* \param n/a
* \return n/a
* \retval
*/
void PIOS_IAP_SetRequest1(void)
{
BKP_WriteBackupRegister( MAGIC_REG_1, IAP_MAGIC_WORD_1);
}
void PIOS_IAP_SetRequest2(void)
{
BKP_WriteBackupRegister( MAGIC_REG_2, IAP_MAGIC_WORD_2);
}
void PIOS_IAP_ClearRequest(void)
{
BKP_WriteBackupRegister( MAGIC_REG_1, 0);
BKP_WriteBackupRegister( MAGIC_REG_2, 0);
}

48
flight/PiOS/inc/pios_iap.h Normal file
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/*!
* @File iap.h
* @Brief Header file for the In-Application-Programming Module
*
* Created on: Sep 6, 2010
* Author: joe
*/
#ifndef PIOS_IAP_H_
#define PIOS_IAP_H_
/****************************************************************************************
* Header files
****************************************************************************************/
/*****************************************************************************************
* Public Definitions/Macros
****************************************************************************************/
#define MAGIC_REG_1 BKP_DR1
#define MAGIC_REG_2 BKP_DR2
#define IAP_COMM BKP_DR3
#define IAP_COMM_INVALID 0
#define IAP_COMM_USB 1
#define IAP_COMM_TELEMETRY 2
#define IAP_COMM_SPI_AHRS 3
#define IAP_COMM_I2C 4
// Additional types can be added along with the proper support code.
/****************************************************************************************
* Public Functions
****************************************************************************************/
void PIOS_IAP_Init(void);
uint32_t PIOS_IAP_CRCVerify( void );
uint32_t PIOS_IAP_CheckRequest( void );
void PIOS_IAP_SetCommInput( uint16_t comm );
uint16_t PIOS_IAP_GetCommInput( void );
void PIOS_IAP_SetRequest1(void);
void PIOS_IAP_SetRequest2(void);
void PIOS_IAP_ClearRequest(void);
void PIOS_IAP_SetCRC( uint32_t crcval );
/****************************************************************************************
* Public Data
****************************************************************************************/
#endif /* PIOS_IAP_H_ */