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TARGET_NUCLEO_L432KC/TARGET_STM/TARGET_STM32L4/i2c_device.h@169:a7c7b631e539, 2018-06-22 (annotated)

Committer:
Anna Bridge
Date:
Fri Jun 22 15:38:59 2018 +0100
Revision:
169:a7c7b631e539
Parent:
156:ff21514d8981 
mbed library. Release version 162

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 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
AnnaBridge 156:ff21514d8981 50
AnnaBridge 156:ff21514d8981 51 /* Provide the suitable timing depending on requested frequencie */
AnnaBridge 156:ff21514d8981 52 static inline uint32_t get_i2c_timing(int hz)
AnnaBridge 156:ff21514d8981 53 {
AnnaBridge 156:ff21514d8981 54 uint32_t tim = 0;
AnnaBridge 156:ff21514d8981 55 if (SystemCoreClock == 80000000) {
AnnaBridge 156:ff21514d8981 56 // Common settings: I2C clock = 80 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 156:ff21514d8981 57 switch (hz) {
AnnaBridge 156:ff21514d8981 58 case 100000:
AnnaBridge 156:ff21514d8981 59 tim = 0x30C14E6B; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 60 break;
AnnaBridge 156:ff21514d8981 61 case 400000:
AnnaBridge 156:ff21514d8981 62 tim = 0x10D1143A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 63 break;
AnnaBridge 156:ff21514d8981 64 case 1000000:
AnnaBridge 156:ff21514d8981 65 tim = 0x00810E27; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 66 break;
AnnaBridge 156:ff21514d8981 67 default:
AnnaBridge 156:ff21514d8981 68 break;
AnnaBridge 156:ff21514d8981 69 }
AnnaBridge 156:ff21514d8981 70 } else if (SystemCoreClock == 48000000) {
AnnaBridge 156:ff21514d8981 71 // Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 156:ff21514d8981 72 switch (hz) {
AnnaBridge 156:ff21514d8981 73 case 100000:
AnnaBridge 156:ff21514d8981 74 tim = 0x20A03E55; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 75 break;
AnnaBridge 156:ff21514d8981 76 case 400000:
AnnaBridge 156:ff21514d8981 77 tim = 0x10800C21; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 78 break;
AnnaBridge 156:ff21514d8981 79 case 1000000:
AnnaBridge 156:ff21514d8981 80 tim = 0x00500816; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 156:ff21514d8981 81 break;
AnnaBridge 156:ff21514d8981 82 default:
AnnaBridge 156:ff21514d8981 83 break;
AnnaBridge 156:ff21514d8981 84 }
AnnaBridge 156:ff21514d8981 85 }
AnnaBridge 156:ff21514d8981 86 return tim;
AnnaBridge 156:ff21514d8981 87 }
AnnaBridge 156:ff21514d8981 88
AnnaBridge 156:ff21514d8981 89 #ifdef __cplusplus
AnnaBridge 156:ff21514d8981 90 }
AnnaBridge 156:ff21514d8981 91 #endif
AnnaBridge 156:ff21514d8981 92
AnnaBridge 156:ff21514d8981 93 #endif // DEVICE_I2C
AnnaBridge 156:ff21514d8981 94
AnnaBridge 156:ff21514d8981 95 #endif