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Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_STM/TARGET_STM32L4/i2c_device.h@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 *******************************************************************************
group-onsemi 0:098463de4c5d 3 * Copyright (c) 2015, STMicroelectronics
group-onsemi 0:098463de4c5d 4 * All rights reserved.
group-onsemi 0:098463de4c5d 5 *
group-onsemi 0:098463de4c5d 6 * Redistribution and use in source and binary forms, with or without
group-onsemi 0:098463de4c5d 7 * modification, are permitted provided that the following conditions are met:
group-onsemi 0:098463de4c5d 8 *
group-onsemi 0:098463de4c5d 9 * 1. Redistributions of source code must retain the above copyright notice,
group-onsemi 0:098463de4c5d 10 * this list of conditions and the following disclaimer.
group-onsemi 0:098463de4c5d 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
group-onsemi 0:098463de4c5d 12 * this list of conditions and the following disclaimer in the documentation
group-onsemi 0:098463de4c5d 13 * and/or other materials provided with the distribution.
group-onsemi 0:098463de4c5d 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
group-onsemi 0:098463de4c5d 15 * may be used to endorse or promote products derived from this software
group-onsemi 0:098463de4c5d 16 * without specific prior written permission.
group-onsemi 0:098463de4c5d 17 *
group-onsemi 0:098463de4c5d 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
group-onsemi 0:098463de4c5d 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
group-onsemi 0:098463de4c5d 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
group-onsemi 0:098463de4c5d 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
group-onsemi 0:098463de4c5d 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
group-onsemi 0:098463de4c5d 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
group-onsemi 0:098463de4c5d 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
group-onsemi 0:098463de4c5d 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
group-onsemi 0:098463de4c5d 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
group-onsemi 0:098463de4c5d 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
group-onsemi 0:098463de4c5d 28 *******************************************************************************
group-onsemi 0:098463de4c5d 29 */
group-onsemi 0:098463de4c5d 30 #ifndef MBED_I2C_DEVICE_H
group-onsemi 0:098463de4c5d 31 #define MBED_I2C_DEVICE_H
group-onsemi 0:098463de4c5d 32
group-onsemi 0:098463de4c5d 33 #include "cmsis.h"
group-onsemi 0:098463de4c5d 34
group-onsemi 0:098463de4c5d 35 #ifdef __cplusplus
group-onsemi 0:098463de4c5d 36 extern "C" {
group-onsemi 0:098463de4c5d 37 #endif
group-onsemi 0:098463de4c5d 38
group-onsemi 0:098463de4c5d 39 #ifdef DEVICE_I2C
group-onsemi 0:098463de4c5d 40
group-onsemi 0:098463de4c5d 41 #define I2C_IP_VERSION_V2
group-onsemi 0:098463de4c5d 42
group-onsemi 0:098463de4c5d 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)
group-onsemi 0:098463de4c5d 44
group-onsemi 0:098463de4c5d 45 /* Family specifc settings for clock source */
group-onsemi 0:098463de4c5d 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
group-onsemi 0:098463de4c5d 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_SYSCLK
group-onsemi 0:098463de4c5d 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
group-onsemi 0:098463de4c5d 49 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
group-onsemi 0:098463de4c5d 50
group-onsemi 0:098463de4c5d 51 /* Provide the suitable timing depending on requested frequencie */
group-onsemi 0:098463de4c5d 52 static inline uint32_t get_i2c_timing(int hz)
group-onsemi 0:098463de4c5d 53 {
group-onsemi 0:098463de4c5d 54 uint32_t tim = 0;
group-onsemi 0:098463de4c5d 55 if (SystemCoreClock == 80000000) {
group-onsemi 0:098463de4c5d 56 // Common settings: I2C clock = 80 MHz, Analog filter = ON, Digital filter coefficient = 0
group-onsemi 0:098463de4c5d 57 switch (hz) {
group-onsemi 0:098463de4c5d 58 case 100000:
group-onsemi 0:098463de4c5d 59 tim = 0x30C14E6B; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 60 break;
group-onsemi 0:098463de4c5d 61 case 400000:
group-onsemi 0:098463de4c5d 62 tim = 0x10D1143A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 63 break;
group-onsemi 0:098463de4c5d 64 case 1000000:
group-onsemi 0:098463de4c5d 65 tim = 0x00810E27; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 66 break;
group-onsemi 0:098463de4c5d 67 default:
group-onsemi 0:098463de4c5d 68 break;
group-onsemi 0:098463de4c5d 69 }
group-onsemi 0:098463de4c5d 70 } else if (SystemCoreClock == 48000000) {
group-onsemi 0:098463de4c5d 71 // Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
group-onsemi 0:098463de4c5d 72 switch (hz) {
group-onsemi 0:098463de4c5d 73 case 100000:
group-onsemi 0:098463de4c5d 74 tim = 0x20A03E55; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 75 break;
group-onsemi 0:098463de4c5d 76 case 400000:
group-onsemi 0:098463de4c5d 77 tim = 0x10800C21; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 78 break;
group-onsemi 0:098463de4c5d 79 case 1000000:
group-onsemi 0:098463de4c5d 80 tim = 0x00500816; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
group-onsemi 0:098463de4c5d 81 break;
group-onsemi 0:098463de4c5d 82 default:
group-onsemi 0:098463de4c5d 83 break;
group-onsemi 0:098463de4c5d 84 }
group-onsemi 0:098463de4c5d 85 }
group-onsemi 0:098463de4c5d 86 return tim;
group-onsemi 0:098463de4c5d 87 }
group-onsemi 0:098463de4c5d 88
group-onsemi 0:098463de4c5d 89 #ifdef __cplusplus
group-onsemi 0:098463de4c5d 90 }
group-onsemi 0:098463de4c5d 91 #endif
group-onsemi 0:098463de4c5d 92
group-onsemi 0:098463de4c5d 93 #endif // DEVICE_I2C
group-onsemi 0:098463de4c5d 94
group-onsemi 0:098463de4c5d 95 #endif