mirror of https://github.com/ARMmbed/mbed-os.git
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* mbed Microcontroller Library
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* SPDX-License-Identifier: BSD-3-Clause
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******************************************************************************
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*
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* Copyright (c) 2016-2020 STMicroelectronics.
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* All rights reserved.
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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#ifndef MBED_I2C_DEVICE_H
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#define MBED_I2C_DEVICE_H
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#include "cmsis.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if DEVICE_I2C
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#define I2C_IP_VERSION_V2
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#if defined I2C1_BASE
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#define I2C1_EV_IRQn I2C1_IRQn
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#define I2C1_ER_IRQn I2C1_IRQn
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#endif
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#if defined I2C2_BASE
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#define I2C2_EV_IRQn I2C2_IRQn
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#define I2C2_ER_IRQn I2C2_IRQn
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#endif
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#if defined I2C3_BASE
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#define I2C3_EV_IRQn I2C3_IRQn
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#define I2C3_ER_IRQn I2C3_IRQn
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#endif
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#define I2C_IT_ALL (I2C_IT_ERRI|I2C_IT_TCI|I2C_IT_STOPI|I2C_IT_NACKI|I2C_IT_ADDRI|I2C_IT_RXI|I2C_IT_TXI)
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/* Family specifc settings for clock source */
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#define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
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#define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
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#define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
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/* Provide the suitable timing depending on requested frequencie */
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static inline uint32_t get_i2c_timing(int hz)
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{
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uint32_t tim = 0;
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switch (hz) {
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case 100000:
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tim = 0x20602938; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
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break;
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case 400000:
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tim = 0x00B0122A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
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break;
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case 1000000:
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tim = 0x0030040E; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
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break;
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default:
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break;
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}
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return tim;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif // DEVICE_I2C
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#endif
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