mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

cmsis/BUILD/mbed/TARGET_DISCO_L496AG/TOOLCHAIN_IAR/i2c_device.h@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 189:f392fc9709a3 1 /* mbed Microcontroller Library
AnnaBridge 189:f392fc9709a3 2 *******************************************************************************
AnnaBridge 189:f392fc9709a3 3 * Copyright (c) 2015, STMicroelectronics
AnnaBridge 189:f392fc9709a3 4 * All rights reserved.
AnnaBridge 189:f392fc9709a3 5 *
AnnaBridge 189:f392fc9709a3 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 189:f392fc9709a3 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 189:f392fc9709a3 8 *
AnnaBridge 189:f392fc9709a3 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 189:f392fc9709a3 10 * this list of conditions and the following disclaimer.
AnnaBridge 189:f392fc9709a3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 189:f392fc9709a3 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 189:f392fc9709a3 13 * and/or other materials provided with the distribution.
AnnaBridge 189:f392fc9709a3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 189:f392fc9709a3 15 * may be used to endorse or promote products derived from this software
AnnaBridge 189:f392fc9709a3 16 * without specific prior written permission.
AnnaBridge 189:f392fc9709a3 17 *
AnnaBridge 189:f392fc9709a3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 189:f392fc9709a3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 189:f392fc9709a3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 189:f392fc9709a3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 189:f392fc9709a3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 189:f392fc9709a3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 189:f392fc9709a3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 189:f392fc9709a3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 189:f392fc9709a3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 189:f392fc9709a3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 189:f392fc9709a3 28 *******************************************************************************
AnnaBridge 189:f392fc9709a3 29 */
AnnaBridge 189:f392fc9709a3 30 #ifndef MBED_I2C_DEVICE_H
AnnaBridge 189:f392fc9709a3 31 #define MBED_I2C_DEVICE_H
AnnaBridge 189:f392fc9709a3 32
AnnaBridge 189:f392fc9709a3 33 #include "cmsis.h"
AnnaBridge 189:f392fc9709a3 34
AnnaBridge 189:f392fc9709a3 35 #ifdef __cplusplus
AnnaBridge 189:f392fc9709a3 36 extern "C" {
AnnaBridge 189:f392fc9709a3 37 #endif
AnnaBridge 189:f392fc9709a3 38
AnnaBridge 189:f392fc9709a3 39 #if DEVICE_I2C
AnnaBridge 189:f392fc9709a3 40
AnnaBridge 189:f392fc9709a3 41 #define I2C_IP_VERSION_V2
AnnaBridge 189:f392fc9709a3 42
AnnaBridge 189:f392fc9709a3 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 189:f392fc9709a3 44
AnnaBridge 189:f392fc9709a3 45 /* Family specifc settings for clock source */
AnnaBridge 189:f392fc9709a3 46 #define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK
AnnaBridge 189:f392fc9709a3 47 #define I2CAPI_I2C2_CLKSRC RCC_I2C2CLKSOURCE_SYSCLK
AnnaBridge 189:f392fc9709a3 48 #define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK
AnnaBridge 189:f392fc9709a3 49 #define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK
AnnaBridge 189:f392fc9709a3 50
AnnaBridge 189:f392fc9709a3 51 /* Provide the suitable timing depending on requested frequencie */
AnnaBridge 189:f392fc9709a3 52 static inline uint32_t get_i2c_timing(int hz)
AnnaBridge 189:f392fc9709a3 53 {
AnnaBridge 189:f392fc9709a3 54 uint32_t tim = 0;
AnnaBridge 189:f392fc9709a3 55 if (SystemCoreClock == 80000000) {
AnnaBridge 189:f392fc9709a3 56 // Common settings: I2C clock = 80 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 189:f392fc9709a3 57 switch (hz) {
AnnaBridge 189:f392fc9709a3 58 case 100000:
AnnaBridge 189:f392fc9709a3 59 tim = 0x30C14E6B; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 60 break;
AnnaBridge 189:f392fc9709a3 61 case 400000:
AnnaBridge 189:f392fc9709a3 62 tim = 0x10D1143A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 63 break;
AnnaBridge 189:f392fc9709a3 64 case 1000000:
AnnaBridge 189:f392fc9709a3 65 tim = 0x00810E27; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 66 break;
AnnaBridge 189:f392fc9709a3 67 default:
AnnaBridge 189:f392fc9709a3 68 break;
AnnaBridge 189:f392fc9709a3 69 }
AnnaBridge 189:f392fc9709a3 70 } else if (SystemCoreClock == 48000000) {
AnnaBridge 189:f392fc9709a3 71 // Common settings: I2C clock = 48 MHz, Analog filter = ON, Digital filter coefficient = 0
AnnaBridge 189:f392fc9709a3 72 switch (hz) {
AnnaBridge 189:f392fc9709a3 73 case 100000:
AnnaBridge 189:f392fc9709a3 74 tim = 0x20A03E55; // Standard mode with Rise Time = 400ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 75 break;
AnnaBridge 189:f392fc9709a3 76 case 400000:
AnnaBridge 189:f392fc9709a3 77 tim = 0x10800C21; // Fast mode with Rise Time = 250ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 78 break;
AnnaBridge 189:f392fc9709a3 79 case 1000000:
AnnaBridge 189:f392fc9709a3 80 tim = 0x00500816; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns
AnnaBridge 189:f392fc9709a3 81 break;
AnnaBridge 189:f392fc9709a3 82 default:
AnnaBridge 189:f392fc9709a3 83 break;
AnnaBridge 189:f392fc9709a3 84 }
AnnaBridge 189:f392fc9709a3 85 }
AnnaBridge 189:f392fc9709a3 86 return tim;
AnnaBridge 189:f392fc9709a3 87 }
AnnaBridge 189:f392fc9709a3 88
AnnaBridge 189:f392fc9709a3 89 #ifdef __cplusplus
AnnaBridge 189:f392fc9709a3 90 }
AnnaBridge 189:f392fc9709a3 91 #endif
AnnaBridge 189:f392fc9709a3 92
AnnaBridge 189:f392fc9709a3 93 #endif // DEVICE_I2C
AnnaBridge 189:f392fc9709a3 94
AnnaBridge 189:f392fc9709a3 95 #endif