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_STM32L0/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 #if defined I2C1_BASE
be_bryan 0:b74591d5ab33 44 #define I2C1_EV_IRQn I2C1_IRQn
be_bryan 0:b74591d5ab33 45 #define I2C1_ER_IRQn I2C1_IRQn
be_bryan 0:b74591d5ab33 46 #endif
be_bryan 0:b74591d5ab33 47 #if defined I2C2_BASE
be_bryan 0:b74591d5ab33 48 #define I2C2_EV_IRQn I2C2_IRQn
be_bryan 0:b74591d5ab33 49 #define I2C2_ER_IRQn I2C2_IRQn
be_bryan 0:b74591d5ab33 50 #endif
be_bryan 0:b74591d5ab33 51 #if defined I2C3_BASE
be_bryan 0:b74591d5ab33 52 #define I2C3_EV_IRQn I2C3_IRQn
be_bryan 0:b74591d5ab33 53 #define I2C3_ER_IRQn I2C3_IRQn
be_bryan 0:b74591d5ab33 54 #endif
be_bryan 0:b74591d5ab33 55
be_bryan 0:b74591d5ab33 56 #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 57
be_bryan 0:b74591d5ab33 58 /* Family specifc settings for clock source */
be_bryan 0:b74591d5ab33 59 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 60 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 61 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
be_bryan 0:b74591d5ab33 62
be_bryan 0:b74591d5ab33 63 /* Provide the suitable timing depending on requested frequencie */
be_bryan 0:b74591d5ab33 64 static inline uint32_t get_i2c_timing(int hz)
be_bryan 0:b74591d5ab33 65 {
be_bryan 0:b74591d5ab33 66 uint32_t tim = 0;
be_bryan 0:b74591d5ab33 67
be_bryan 0:b74591d5ab33 68 switch (hz) {
be_bryan 0:b74591d5ab33 69 case 100000:
be_bryan 0:b74591d5ab33 70 tim = 0x20602938; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
be_bryan 0:b74591d5ab33 71 break;
be_bryan 0:b74591d5ab33 72 case 400000:
be_bryan 0:b74591d5ab33 73 tim = 0x00B0122A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
be_bryan 0:b74591d5ab33 74 break;
be_bryan 0:b74591d5ab33 75 case 1000000:
be_bryan 0:b74591d5ab33 76 tim = 0x0030040E; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
be_bryan 0:b74591d5ab33 77 break;
be_bryan 0:b74591d5ab33 78 default:
be_bryan 0:b74591d5ab33 79 break;
be_bryan 0:b74591d5ab33 80 }
be_bryan 0:b74591d5ab33 81 return tim;
be_bryan 0:b74591d5ab33 82 }
be_bryan 0:b74591d5ab33 83
be_bryan 0:b74591d5ab33 84 #ifdef __cplusplus
be_bryan 0:b74591d5ab33 85 }
be_bryan 0:b74591d5ab33 86 #endif
be_bryan 0:b74591d5ab33 87
be_bryan 0:b74591d5ab33 88 #endif // DEVICE_I2C
be_bryan 0:b74591d5ab33 89
be_bryan 0:b74591d5ab33 90 #endif