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Start implementation of option byte manipulation

This commit is contained in:
Mario Hüttel 2021-10-16 00:44:39 +02:00
parent 4009a2794d
commit decb484d06
2 changed files with 93 additions and 0 deletions
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45
stm-firmware/include/stm-periph/option-bytes.h Normal file
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/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* GDSII-Converter 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _OPTION_BYTES_H_
#define _OPTION_BYTES_H_
#include <stdint.h>
struct option_bytes {
/* Word 1 */
uint32_t read_protection;// : 8;
uint32_t nrst_standby;// : 1;
uint32_t nrst_stop;// : 1;
uint32_t wdg_sw;// : 1;
uint32_t brown_out_level;// : 2;
/* Word 2 */
uint32_t nwrpi;// : 12;
};
/**
* @brief Read out the option bytes to structs
* @param opts
*/
void stm_option_bytes_read(struct option_bytes *opts);
int stm_option_bytes_program(const struct option_bytes *opts);
#endif /* _OPTION_BYTES_H_ */

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stm-firmware/stm-periph/option-bytes.c Normal file
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/* Reflow Oven Controller
*
* Copyright (C) 2021 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware 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 the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stm-periph/option-bytes.h>
#include <stm32/stm32f4xx.h>
void stm_option_bytes_read(struct option_bytes *opts)
{
uint32_t opt_reg;
if (!opts)
return;
opt_reg = FLASH->OPTCR;
opts->brown_out_level = (opt_reg & FLASH_OPTCR_BOR_LEV) >> 2;
opts->nrst_standby = (opt_reg & FLASH_OPTCR_nRST_STDBY) >> 7;
opts->nrst_stop = (opt_reg & FLASH_OPTCR_nRST_STOP) >> 6;
opts->nwrpi = (opt_reg & FLASH_OPTCR_nWRP) >> 16;
opts->read_protection = (opt_reg & FLASH_OPTCR_RDP) >> 8;
opts->wdg_sw = (opt_reg & FLASH_OPTCR_WDG_SW) >> 5;
}
int stm_option_bytes_program(const struct option_bytes *opts)
{
FLASH->OPTKEYR = 0x08192A3BUL;
FLASH->OPTKEYR = 0x4C5D6E7FUL;
FLASH->OPTCR |= FLASH_OPTCR_OPTLOCK;
return 0;
}