66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/** @defgroup i2c_defines I2C Defines
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@brief <b>Defined Constants and Types for the STM32F4xx I2C </b>
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@ingroup STM32F4xx_defines
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@version 1.0.0
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@date 12 October 2012
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LGPL License Terms @ref lgpl_license
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*/
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/*
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* This file is part of the libopencm3 project.
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LIBOPENCM3_I2C_H
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#define LIBOPENCM3_I2C_H
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#include <libopencm3/stm32/memorymap.h>
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#include <libopencm3/stm32/common/i2c_common_v1.h>
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/**
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@addtogroup i2c_defines
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@{*/
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/** FLTR register (I2Cx_FLTR) (noise filter) */
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#define I2C_FLTR(i2c_base) MMIO32((i2c_base) + 0x24)
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#define I2C1_FLTR I2C_FLTR(I2C1)
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#define I2C2_FLTR I2C_FLTR(I2C2)
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#define I2C3_FLTR I2C_FLTR(I2C3)
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/**
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* Bits [3:0] DNF - Digital noise filter
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* These bits configure a digital noise filter on SDA and SCL pins.
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* Value sets minimum pulse width needed to trigger i2c operations.
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* 0 disables, 1 - 15 set minimum width to 'n' * TPCLK1
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*/
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#define I2C_FLTR_DNF_MASK 0xF
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#define I2C_FLTR_DNF_SHIFT 0
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/**
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* Bit 4 - Analog Noise filter disable
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* Turns off the built in analog noise filter.
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*/
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#define I2C_FLTR_ANOFF (1<<4)
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/**@}*/
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#endif
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