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170 lines
5.1 KiB
C
170 lines
5.1 KiB
C
/**
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******************************************************************************
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* @addtogroup PIOS PIOS Core hardware abstraction layer
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* @{
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* @addtogroup PIOS_IAP IAP Functions
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* @brief Common IAP functionality
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* @{
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*
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* @file pios_iap.c
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
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* @brief In application programming functions
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/****************************************************************************************
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* Header files
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****************************************************************************************/
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#include <pios.h>
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#include <pios_bkp.h>
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#ifdef PIOS_INCLUDE_IAP
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/****************************************************************************************
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* Private Definitions/Macros
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****************************************************************************************/
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/* these definitions reside here for protection and privacy. */
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#define IAP_MAGIC_WORD_1 0x1122
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#define IAP_MAGIC_WORD_2 0xAA55
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#define UPPERWORD16(lw) (uint16_t)((uint32_t)(lw) >> 16)
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#define LOWERWORD16(lw) (uint16_t)((uint32_t)(lw) & 0x0000ffff)
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#define UPPERBYTE(w) (uint8_t)((w) >> 8)
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#define LOWERBYTE(w) (uint8_t)((w) & 0x00ff)
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/****************************************************************************************
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* Private Functions
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****************************************************************************************/
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/****************************************************************************************
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* Private (static) Data
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****************************************************************************************/
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const uint16_t pios_iap_cmd_list[] = {
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IAP_CMD1,
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IAP_CMD2,
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IAP_CMD3
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};
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/****************************************************************************************
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* Public/Global Data
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****************************************************************************************/
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/*!
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* \brief PIOS_IAP_Init - performs required initializations for iap module.
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* \param none.
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* \return none.
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* \retval none.
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*
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* Created: Sep 8, 2010 10:10:48 PM by joe
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*/
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void PIOS_IAP_Init(void)
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{
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PIOS_BKP_Init();
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PIOS_BKP_EnableWrite();
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}
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/*!
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* \brief Determines if an In-Application-Programming request has been made.
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* \param *comm - Which communication stream to use for the IAP (USB, Telemetry, I2C, SPI, etc)
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* \return TRUE - if correct sequence found, along with 'comm' updated.
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* FALSE - Note that 'comm' will have an invalid comm identifier.
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* \retval
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*
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*/
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uint32_t PIOS_IAP_CheckRequest(void)
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{
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uint32_t retval = false;
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uint16_t reg1;
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uint16_t reg2;
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reg1 = PIOS_BKP_ReadRegister(MAGIC_REG_1);
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reg2 = PIOS_BKP_ReadRegister(MAGIC_REG_2);
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if (reg1 == IAP_MAGIC_WORD_1 && reg2 == IAP_MAGIC_WORD_2) {
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// We have a match.
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retval = true;
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} else {
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retval = false;
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}
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return retval;
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}
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/*!
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* \brief Sets the 1st word of the request sequence.
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* \param n/a
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* \return n/a
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* \retval
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*/
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void PIOS_IAP_SetRequest1(void)
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{
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PIOS_BKP_WriteRegister(MAGIC_REG_1, IAP_MAGIC_WORD_1);
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}
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void PIOS_IAP_SetRequest2(void)
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{
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PIOS_BKP_WriteRegister(MAGIC_REG_2, IAP_MAGIC_WORD_2);
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}
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void PIOS_IAP_ClearRequest(void)
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{
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PIOS_BKP_WriteRegister(MAGIC_REG_1, 0);
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PIOS_BKP_WriteRegister(MAGIC_REG_2, 0);
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}
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uint16_t PIOS_IAP_ReadBootCount(void)
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{
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return PIOS_BKP_ReadRegister(IAP_BOOTCOUNT);
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}
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void PIOS_IAP_WriteBootCount(uint16_t boot_count)
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{
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PIOS_BKP_WriteRegister(IAP_BOOTCOUNT, boot_count);
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}
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/**
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* @brief Return one of the IAP command values passed from bootloader.
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* @param number: the index of the command value (0..2).
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* @retval the selected command value.
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*/
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uint32_t PIOS_IAP_ReadBootCmd(uint8_t number)
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{
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if (PIOS_IAP_CMD_COUNT < number) {
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PIOS_Assert(0);
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} else {
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return PIOS_BKP_ReadRegister(pios_iap_cmd_list[number]);
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}
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}
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/**
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* @brief Write one of the IAP command values to be passed to firmware from bootloader.
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* @param number: the index of the command value (0..2).
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* @param value: value to be written.
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*/
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void PIOS_IAP_WriteBootCmd(uint8_t number, uint32_t value)
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{
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if (PIOS_IAP_CMD_COUNT < number) {
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PIOS_Assert(0);
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} else {
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PIOS_BKP_WriteRegister(pios_iap_cmd_list[number], value);
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}
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}
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#endif /* PIOS_INCLUDE_IAP */
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