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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_L496ZG_P/TOOLCHAIN_IAR/i2c_device.h@171:3a7713b1edbc, 2018-11-08 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 08 11:45:42 2018 +0000
Revision:
171:3a7713b1edbc
Parent:
TARGET_DISCO_L475VG_IOT01A/TARGET_STM/TARGET_STM32L4/i2c_device.h@145:64910690c574
Child:
172:65be27845400
mbed library. Release version 164

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 145:64910690c574 1 /* mbed Microcontroller Library
AnnaBridge 145:64910690c574 2 *******************************************************************************
AnnaBridge 145:64910690c574 3 * Copyright (c) 2015, STMicroelectronics
AnnaBridge 145:64910690c574 4 * All rights reserved.
AnnaBridge 145:64910690c574 5 *
AnnaBridge 145:64910690c574 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 145:64910690c574 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 145:64910690c574 8 *
AnnaBridge 145:64910690c574 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 145:64910690c574 10 * this list of conditions and the following disclaimer.
AnnaBridge 145:64910690c574 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 145:64910690c574 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 145:64910690c574 13 * and/or other materials provided with the distribution.
AnnaBridge 145:64910690c574 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 145:64910690c574 15 * may be used to endorse or promote products derived from this software
AnnaBridge 145:64910690c574 16 * without specific prior written permission.
AnnaBridge 145:64910690c574 17 *
AnnaBridge 145:64910690c574 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 145:64910690c574 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 145:64910690c574 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 145:64910690c574 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 145:64910690c574 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 145:64910690c574 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 145:64910690c574 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 145:64910690c574 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 145:64910690c574 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 145:64910690c574 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 145:64910690c574 28 *******************************************************************************
AnnaBridge 145:64910690c574 29 */
AnnaBridge 145:64910690c574 30 #ifndef MBED_I2C_DEVICE_H
AnnaBridge 145:64910690c574 31 #define MBED_I2C_DEVICE_H
AnnaBridge 145:64910690c574 32
AnnaBridge 145:64910690c574 33 #include "cmsis.h"
AnnaBridge 145:64910690c574 34
AnnaBridge 145:64910690c574 35 #ifdef __cplusplus
AnnaBridge 145:64910690c574 36 extern "C" {
AnnaBridge 145:64910690c574 37 #endif
AnnaBridge 145:64910690c574 38
AnnaBridge 145:64910690c574 39 #ifdef DEVICE_I2C
AnnaBridge 145:64910690c574 40
AnnaBridge 145:64910690c574 41 #define I2C_IP_VERSION_V2
AnnaBridge 145:64910690c574 42
AnnaBridge 145:64910690c574 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 145:64910690c574 44
AnnaBridge 145:64910690c574 45 /* Family specifc settings for clock source */
AnnaBridge 145:64910690c574 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
AnnaBridge 145:64910690c574 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_SYSCLK
AnnaBridge 145:64910690c574 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
AnnaBridge 145:64910690c574 49 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
AnnaBridge 145:64910690c574 50
AnnaBridge 145:64910690c574 51 /* Provide the suitable timing depending on requested frequencie */
AnnaBridge 145:64910690c574 52 static inline uint32_t get_i2c_timing(int hz)
AnnaBridge 145:64910690c574 53 {
AnnaBridge 145:64910690c574 54 uint32_t tim = 0;
AnnaBridge 145:64910690c574 55 if (SystemCoreClock == 80000000) {
AnnaBridge 145:64910690c574 56 // Common settings: I2C clock = 80 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 145:64910690c574 57 switch (hz) {
AnnaBridge 145:64910690c574 58 case 100000:
AnnaBridge 145:64910690c574 59 tim = 0x30C14E6B; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 60 break;
AnnaBridge 145:64910690c574 61 case 400000:
AnnaBridge 145:64910690c574 62 tim = 0x10D1143A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 63 break;
AnnaBridge 145:64910690c574 64 case 1000000:
AnnaBridge 145:64910690c574 65 tim = 0x00810E27; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 66 break;
AnnaBridge 145:64910690c574 67 default:
AnnaBridge 145:64910690c574 68 break;
AnnaBridge 145:64910690c574 69 }
AnnaBridge 145:64910690c574 70 } else if (SystemCoreClock == 48000000) {
AnnaBridge 145:64910690c574 71 // Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 145:64910690c574 72 switch (hz) {
AnnaBridge 145:64910690c574 73 case 100000:
AnnaBridge 145:64910690c574 74 tim = 0x20A03E55; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 75 break;
AnnaBridge 145:64910690c574 76 case 400000:
AnnaBridge 145:64910690c574 77 tim = 0x10800C21; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 78 break;
AnnaBridge 145:64910690c574 79 case 1000000:
AnnaBridge 145:64910690c574 80 tim = 0x00500816; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 145:64910690c574 81 break;
AnnaBridge 145:64910690c574 82 default:
AnnaBridge 145:64910690c574 83 break;
AnnaBridge 145:64910690c574 84 }
AnnaBridge 145:64910690c574 85 }
AnnaBridge 145:64910690c574 86 return tim;
AnnaBridge 145:64910690c574 87 }
AnnaBridge 145:64910690c574 88
AnnaBridge 145:64910690c574 89 #ifdef __cplusplus
AnnaBridge 145:64910690c574 90 }
AnnaBridge 145:64910690c574 91 #endif
AnnaBridge 145:64910690c574 92
AnnaBridge 145:64910690c574 93 #endif // DEVICE_I2C
AnnaBridge 145:64910690c574 94
AnnaBridge 145:64910690c574 95 #endif