79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2012 LeafLabs, LLC.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/**
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* @file libmaple/stm32f2/syscfg.c
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* @brief SYSCFG routines.
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*/
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#include <libmaple/syscfg.h>
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#include <libmaple/bitband.h>
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#include <libmaple/rcc.h>
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/**
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* @brief Initialize the SYSCFG peripheral.
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*/
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void syscfg_init(void) {
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rcc_clk_enable(RCC_SYSCFG);
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rcc_reset_dev(RCC_SYSCFG);
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}
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/**
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* @brief Turn on the I/O compensation cell.
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*
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* It's only safe to do this when the supply voltage is between 2.4 V
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* and 3.6 V.
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*/
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void syscfg_enable_io_compensation(void) {
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bb_peri_set_bit(&SYSCFG_BASE->CMPCR, SYSCFG_CMPCR_CMP_PD_BIT, 1);
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while (!(SYSCFG_BASE->CMPCR & SYSCFG_CMPCR_READY))
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;
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}
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/**
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* @brief Turn off the I/O compensation cell.
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*/
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void syscfg_disable_io_compensation(void) {
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bb_peri_set_bit(&SYSCFG_BASE->CMPCR, SYSCFG_CMPCR_CMP_PD_BIT, 0);
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}
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/**
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* @brief Set the memory to be mapped at address 0x00000000.
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*
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* This function can be used to override the BOOT pin
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* configuration. Some restrictions apply; see your chip's reference
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* manual for the details.
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*
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* @param mode Mode to set
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* @see syscfg_mem_mode
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*/
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void syscfg_set_mem_mode(syscfg_mem_mode mode) {
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uint32 memrmp = SYSCFG_BASE->MEMRMP;
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memrmp &= ~SYSCFG_MEMRMP_MEM_MODE;
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memrmp |= (uint32)mode;
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SYSCFG_BASE->MEMRMP = memrmp;
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}
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