mbed official / mbed

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_F334R8/TARGET_STM/TARGET_STM32F3/i2c_device.h@160:5571c4ff569f, 2018-01-17 (annotated)

Committer:
Anna Bridge
Date:
Wed Jan 17 16:13:02 2018 +0000
Revision:
160:5571c4ff569f
Parent:
156:ff21514d8981 
mbed library. Release version 158

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 156:ff21514d8981 1 /* mbed Microcontroller Library
AnnaBridge 156:ff21514d8981 2 *******************************************************************************
AnnaBridge 156:ff21514d8981 3 * Copyright (c) 2015, STMicroelectronics
AnnaBridge 156:ff21514d8981 4 * All rights reserved.
AnnaBridge 156:ff21514d8981 5 *
AnnaBridge 156:ff21514d8981 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 156:ff21514d8981 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 156:ff21514d8981 8 *
AnnaBridge 156:ff21514d8981 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 156:ff21514d8981 10 * this list of conditions and the following disclaimer.
AnnaBridge 156:ff21514d8981 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 156:ff21514d8981 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 156:ff21514d8981 13 * and/or other materials provided with the distribution.
AnnaBridge 156:ff21514d8981 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 156:ff21514d8981 15 * may be used to endorse or promote products derived from this software
AnnaBridge 156:ff21514d8981 16 * without specific prior written permission.
AnnaBridge 156:ff21514d8981 17 *
AnnaBridge 156:ff21514d8981 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 156:ff21514d8981 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 156:ff21514d8981 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 156:ff21514d8981 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 156:ff21514d8981 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 156:ff21514d8981 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 156:ff21514d8981 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 156:ff21514d8981 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 156:ff21514d8981 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 156:ff21514d8981 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 156:ff21514d8981 28 *******************************************************************************
AnnaBridge 156:ff21514d8981 29 */
AnnaBridge 156:ff21514d8981 30 #ifndef MBED_I2C_DEVICE_H
AnnaBridge 156:ff21514d8981 31 #define MBED_I2C_DEVICE_H
AnnaBridge 156:ff21514d8981 32
AnnaBridge 156:ff21514d8981 33 #include "cmsis.h"
AnnaBridge 156:ff21514d8981 34
AnnaBridge 156:ff21514d8981 35 #ifdef __cplusplus
AnnaBridge 156:ff21514d8981 36 extern "C" {
AnnaBridge 156:ff21514d8981 37 #endif
AnnaBridge 156:ff21514d8981 38
AnnaBridge 156:ff21514d8981 39 #ifdef DEVICE_I2C
AnnaBridge 156:ff21514d8981 40
AnnaBridge 156:ff21514d8981 41 #define I2C_IP_VERSION_V2
AnnaBridge 156:ff21514d8981 42
AnnaBridge 156:ff21514d8981 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 156:ff21514d8981 44
AnnaBridge 156:ff21514d8981 45 /* Family specifc settings for clock source */
AnnaBridge 156:ff21514d8981 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
AnnaBridge 156:ff21514d8981 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_SYSCLK
AnnaBridge 156:ff21514d8981 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
AnnaBridge 156:ff21514d8981 49
AnnaBridge 156:ff21514d8981 50 /* Provide the suitable timing depending on requested frequencie */
AnnaBridge 156:ff21514d8981 51 static inline uint32_t get_i2c_timing(int hz)
AnnaBridge 156:ff21514d8981 52 {
AnnaBridge 156:ff21514d8981 53 uint32_t tim = 0;
AnnaBridge 156:ff21514d8981 54 /*
AnnaBridge 156:ff21514d8981 55 Values calculated with I2C_Timing_Configuration_V1.0.1.xls file (see AN4235)
AnnaBridge 156:ff21514d8981 56 * Standard mode (up to 100 kHz)
AnnaBridge 156:ff21514d8981 57 * Fast Mode (up to 400 kHz)
AnnaBridge 156:ff21514d8981 58 * Fast Mode Plus (up to 1 MHz)
AnnaBridge 156:ff21514d8981 59 Below values obtained with:
AnnaBridge 156:ff21514d8981 60 - I2C clock source = 64 MHz (System Clock w/ HSI) or 72 (System Clock w/ HSE)
AnnaBridge 156:ff21514d8981 61 - Analog filter delay = ON
AnnaBridge 156:ff21514d8981 62 - Digital filter coefficient = 0
AnnaBridge 156:ff21514d8981 63 */
AnnaBridge 156:ff21514d8981 64 if (SystemCoreClock == 64000000) {
AnnaBridge 156:ff21514d8981 65 switch (hz) {
AnnaBridge 156:ff21514d8981 66 case 100000:
AnnaBridge 156:ff21514d8981 67 tim = 0x10B17DB4; // Standard mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 156:ff21514d8981 68 break;
AnnaBridge 156:ff21514d8981 69 case 400000:
AnnaBridge 156:ff21514d8981 70 tim = 0x00E22163; // Fast Mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 156:ff21514d8981 71 break;
AnnaBridge 156:ff21514d8981 72 case 1000000:
AnnaBridge 156:ff21514d8981 73 tim = 0x00A00D1E; // Fast Mode Plus with Rise time = 120ns, Fall time = 10ns
AnnaBridge 156:ff21514d8981 74 break;
AnnaBridge 156:ff21514d8981 75 default:
AnnaBridge 156:ff21514d8981 76 break;
AnnaBridge 156:ff21514d8981 77 }
AnnaBridge 156:ff21514d8981 78 } else if (SystemCoreClock == 72000000) {
AnnaBridge 156:ff21514d8981 79 switch (hz) {
AnnaBridge 156:ff21514d8981 80 case 100000:
AnnaBridge 156:ff21514d8981 81 tim = 0x10D28DCB; // Standard mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 156:ff21514d8981 82 break;
AnnaBridge 156:ff21514d8981 83 case 400000:
AnnaBridge 156:ff21514d8981 84 tim = 0x00F32571; // Fast Mode with Rise time = 120ns, Fall time = 120ns
AnnaBridge 156:ff21514d8981 85 break;
AnnaBridge 156:ff21514d8981 86 case 1000000:
AnnaBridge 156:ff21514d8981 87 tim = 0x00C00D24; // Fast Mode Plus with Rise time = 120ns, Fall time = 10ns
AnnaBridge 156:ff21514d8981 88 break;
AnnaBridge 156:ff21514d8981 89 default:
AnnaBridge 156:ff21514d8981 90 break;
AnnaBridge 156:ff21514d8981 91 }
AnnaBridge 156:ff21514d8981 92 }
AnnaBridge 156:ff21514d8981 93 return tim;
AnnaBridge 156:ff21514d8981 94 }
AnnaBridge 156:ff21514d8981 95
AnnaBridge 156:ff21514d8981 96 #ifdef __cplusplus
AnnaBridge 156:ff21514d8981 97 }
AnnaBridge 156:ff21514d8981 98 #endif
AnnaBridge 156:ff21514d8981 99
AnnaBridge 156:ff21514d8981 100 #endif // DEVICE_I2C
AnnaBridge 156:ff21514d8981 101
AnnaBridge 156:ff21514d8981 102 #endif