EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_STM/TARGET_STM32F3/i2c_device.h@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 *******************************************************************************
be_bryan 0:b74591d5ab33 3 * Copyright (c) 2015, STMicroelectronics
be_bryan 0:b74591d5ab33 4 * All rights reserved.
be_bryan 0:b74591d5ab33 5 *
be_bryan 0:b74591d5ab33 6 * Redistribution and use in source and binary forms, with or without
be_bryan 0:b74591d5ab33 7 * modification, are permitted provided that the following conditions are met:
be_bryan 0:b74591d5ab33 8 *
be_bryan 0:b74591d5ab33 9 * 1. Redistributions of source code must retain the above copyright notice,
be_bryan 0:b74591d5ab33 10 * this list of conditions and the following disclaimer.
be_bryan 0:b74591d5ab33 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
be_bryan 0:b74591d5ab33 12 * this list of conditions and the following disclaimer in the documentation
be_bryan 0:b74591d5ab33 13 * and/or other materials provided with the distribution.
be_bryan 0:b74591d5ab33 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
be_bryan 0:b74591d5ab33 15 * may be used to endorse or promote products derived from this software
be_bryan 0:b74591d5ab33 16 * without specific prior written permission.
be_bryan 0:b74591d5ab33 17 *
be_bryan 0:b74591d5ab33 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
be_bryan 0:b74591d5ab33 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
be_bryan 0:b74591d5ab33 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
be_bryan 0:b74591d5ab33 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
be_bryan 0:b74591d5ab33 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
be_bryan 0:b74591d5ab33 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
be_bryan 0:b74591d5ab33 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
be_bryan 0:b74591d5ab33 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
be_bryan 0:b74591d5ab33 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
be_bryan 0:b74591d5ab33 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
be_bryan 0:b74591d5ab33 28 *******************************************************************************
be_bryan 0:b74591d5ab33 29 */
be_bryan 0:b74591d5ab33 30 #ifndef MBED_I2C_DEVICE_H
be_bryan 0:b74591d5ab33 31 #define MBED_I2C_DEVICE_H
be_bryan 0:b74591d5ab33 32
be_bryan 0:b74591d5ab33 33 #include "cmsis.h"
be_bryan 0:b74591d5ab33 34
be_bryan 0:b74591d5ab33 35 #ifdef __cplusplus
be_bryan 0:b74591d5ab33 36 extern "C" {
be_bryan 0:b74591d5ab33 37 #endif
be_bryan 0:b74591d5ab33 38
be_bryan 0:b74591d5ab33 39 #ifdef DEVICE_I2C
be_bryan 0:b74591d5ab33 40
be_bryan 0:b74591d5ab33 41 #define I2C_IP_VERSION_V2
be_bryan 0:b74591d5ab33 42
be_bryan 0:b74591d5ab33 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)
be_bryan 0:b74591d5ab33 44
be_bryan 0:b74591d5ab33 45 /* Family specifc settings for clock source */
be_bryan 0:b74591d5ab33 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 49
be_bryan 0:b74591d5ab33 50 /* Provide the suitable timing depending on requested frequencie */
be_bryan 0:b74591d5ab33 51 static inline uint32_t get_i2c_timing(int hz)
be_bryan 0:b74591d5ab33 52 {
be_bryan 0:b74591d5ab33 53 uint32_t tim = 0;
be_bryan 0:b74591d5ab33 54 /*
be_bryan 0:b74591d5ab33 55 Values calculated with I2C_Timing_Configuration_V1.0.1.xls file (see AN4235)
be_bryan 0:b74591d5ab33 56 * Standard mode (up to 100 kHz)
be_bryan 0:b74591d5ab33 57 * Fast Mode (up to 400 kHz)
be_bryan 0:b74591d5ab33 58 * Fast Mode Plus (up to 1 MHz)
be_bryan 0:b74591d5ab33 59 Below values obtained with:
be_bryan 0:b74591d5ab33 60 - I2C clock source = 64 MHz (System Clock w/ HSI) or 72 (System Clock w/ HSE)
be_bryan 0:b74591d5ab33 61 - Analog filter delay = ON
be_bryan 0:b74591d5ab33 62 - Digital filter coefficient = 0
be_bryan 0:b74591d5ab33 63 */
be_bryan 0:b74591d5ab33 64 if (SystemCoreClock == 64000000) {
be_bryan 0:b74591d5ab33 65 switch (hz) {
be_bryan 0:b74591d5ab33 66 case 100000:
be_bryan 0:b74591d5ab33 67 tim = 0x10B17DB4; // Standard mode with Rise time = 120ns, Fall time = 120ns
be_bryan 0:b74591d5ab33 68 break;
be_bryan 0:b74591d5ab33 69 case 400000:
be_bryan 0:b74591d5ab33 70 tim = 0x00E22163; // Fast Mode with Rise time = 120ns, Fall time = 120ns
be_bryan 0:b74591d5ab33 71 break;
be_bryan 0:b74591d5ab33 72 case 1000000:
be_bryan 0:b74591d5ab33 73 tim = 0x00A00D1E; // Fast Mode Plus with Rise time = 120ns, Fall time = 10ns
be_bryan 0:b74591d5ab33 74 break;
be_bryan 0:b74591d5ab33 75 default:
be_bryan 0:b74591d5ab33 76 break;
be_bryan 0:b74591d5ab33 77 }
be_bryan 0:b74591d5ab33 78 } else if (SystemCoreClock == 72000000) {
be_bryan 0:b74591d5ab33 79 switch (hz) {
be_bryan 0:b74591d5ab33 80 case 100000:
be_bryan 0:b74591d5ab33 81 tim = 0x10D28DCB; // Standard mode with Rise time = 120ns, Fall time = 120ns
be_bryan 0:b74591d5ab33 82 break;
be_bryan 0:b74591d5ab33 83 case 400000:
be_bryan 0:b74591d5ab33 84 tim = 0x00F32571; // Fast Mode with Rise time = 120ns, Fall time = 120ns
be_bryan 0:b74591d5ab33 85 break;
be_bryan 0:b74591d5ab33 86 case 1000000:
be_bryan 0:b74591d5ab33 87 tim = 0x00C00D24; // Fast Mode Plus with Rise time = 120ns, Fall time = 10ns
be_bryan 0:b74591d5ab33 88 break;
be_bryan 0:b74591d5ab33 89 default:
be_bryan 0:b74591d5ab33 90 break;
be_bryan 0:b74591d5ab33 91 }
be_bryan 0:b74591d5ab33 92 }
be_bryan 0:b74591d5ab33 93 return tim;
be_bryan 0:b74591d5ab33 94 }
be_bryan 0:b74591d5ab33 95
be_bryan 0:b74591d5ab33 96 #ifdef __cplusplus
be_bryan 0:b74591d5ab33 97 }
be_bryan 0:b74591d5ab33 98 #endif
be_bryan 0:b74591d5ab33 99
be_bryan 0:b74591d5ab33 100 #endif // DEVICE_I2C
be_bryan 0:b74591d5ab33 101
be_bryan 0:b74591d5ab33 102 #endif