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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

TARGET_NUCLEO_H743ZI/TOOLCHAIN_ARM_MICRO/i2c_device.h@172:65be27845400, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 20:53:29 2019 +0000
Revision:
172:65be27845400
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 172:65be27845400 1 /* mbed Microcontroller Library
AnnaBridge 172:65be27845400 2 *******************************************************************************
AnnaBridge 172:65be27845400 3 * Copyright (c) 2015, STMicroelectronics
AnnaBridge 172:65be27845400 4 * All rights reserved.
AnnaBridge 172:65be27845400 5 *
AnnaBridge 172:65be27845400 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 172:65be27845400 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 172:65be27845400 8 *
AnnaBridge 172:65be27845400 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 172:65be27845400 10 * this list of conditions and the following disclaimer.
AnnaBridge 172:65be27845400 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 172:65be27845400 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 172:65be27845400 13 * and/or other materials provided with the distribution.
AnnaBridge 172:65be27845400 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 172:65be27845400 15 * may be used to endorse or promote products derived from this software
AnnaBridge 172:65be27845400 16 * without specific prior written permission.
AnnaBridge 172:65be27845400 17 *
AnnaBridge 172:65be27845400 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 172:65be27845400 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 172:65be27845400 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 172:65be27845400 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 172:65be27845400 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 172:65be27845400 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 172:65be27845400 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 172:65be27845400 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 172:65be27845400 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 172:65be27845400 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 172:65be27845400 28 *******************************************************************************
AnnaBridge 172:65be27845400 29 */
AnnaBridge 172:65be27845400 30 #ifndef MBED_I2C_DEVICE_H
AnnaBridge 172:65be27845400 31 #define MBED_I2C_DEVICE_H
AnnaBridge 172:65be27845400 32
AnnaBridge 172:65be27845400 33 #include "cmsis.h"
AnnaBridge 172:65be27845400 34
AnnaBridge 172:65be27845400 35 #ifdef __cplusplus
AnnaBridge 172:65be27845400 36 extern "C" {
AnnaBridge 172:65be27845400 37 #endif
AnnaBridge 172:65be27845400 38
AnnaBridge 172:65be27845400 39 #if DEVICE_I2C
AnnaBridge 172:65be27845400 40
AnnaBridge 172:65be27845400 41 #define I2C_IP_VERSION_V2
AnnaBridge 172:65be27845400 42
AnnaBridge 172:65be27845400 43 #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)
AnnaBridge 172:65be27845400 44
AnnaBridge 172:65be27845400 45 /* Family specifc settings for clock source */
AnnaBridge 172:65be27845400 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_D2PCLK1
AnnaBridge 172:65be27845400 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_D2PCLK1
AnnaBridge 172:65be27845400 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_D2PCLK1
AnnaBridge 172:65be27845400 49 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_D3PCLK1
AnnaBridge 172:65be27845400 50
AnnaBridge 172:65be27845400 51 /* Provide the suitable timing depending on requested frequencie */
AnnaBridge 172:65be27845400 52 static inline uint32_t get_i2c_timing(int hz)
AnnaBridge 172:65be27845400 53 {
AnnaBridge 172:65be27845400 54 uint32_t tim = 0;
AnnaBridge 172:65be27845400 55 /*
AnnaBridge 172:65be27845400 56 Values calculated with I2C_Timing_Configuration tool (excel file)
AnnaBridge 172:65be27845400 57 * Standard mode (up to 100 kHz)
AnnaBridge 172:65be27845400 58 * Fast Mode (up to 400 kHz)
AnnaBridge 172:65be27845400 59 * Fast Mode Plus (up to 1 MHz)
AnnaBridge 172:65be27845400 60 Below values obtained with:
AnnaBridge 172:65be27845400 61 - I2Cx clock source = APB1CLK = 54 MHz
AnnaBridge 172:65be27845400 62 - Analog filter delay = ON
AnnaBridge 172:65be27845400 63 - Digital filter coefficient = 0
AnnaBridge 172:65be27845400 64 */
AnnaBridge 172:65be27845400 65 switch (hz) {
AnnaBridge 172:65be27845400 66 case 100000:
AnnaBridge 172:65be27845400 67 tim = 0x10916998; // Standard mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 172:65be27845400 68 break;
AnnaBridge 172:65be27845400 69 case 400000:
AnnaBridge 172:65be27845400 70 tim = 0x00B11B54; // Fast Mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 172:65be27845400 71 break;
AnnaBridge 172:65be27845400 72 case 1000000:
AnnaBridge 172:65be27845400 73 tim = 0x0090091B; // Fast Mode Plus with Rise time = 120ns, Fall time = 10ns
AnnaBridge 172:65be27845400 74 break;
AnnaBridge 172:65be27845400 75 default:
AnnaBridge 172:65be27845400 76 break;
AnnaBridge 172:65be27845400 77 }
AnnaBridge 172:65be27845400 78 return tim;
AnnaBridge 172:65be27845400 79 }
AnnaBridge 172:65be27845400 80
AnnaBridge 172:65be27845400 81 #ifdef __cplusplus
AnnaBridge 172:65be27845400 82 }
AnnaBridge 172:65be27845400 83 #endif
AnnaBridge 172:65be27845400 84
AnnaBridge 172:65be27845400 85 #endif // DEVICE_I2C
AnnaBridge 172:65be27845400 86
AnnaBridge 172:65be27845400 87 #endif