The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Dependents: hello SerialTestv11 SerialTestv12 Sierpinski ... more
mbed 2
This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.
Diff: TARGET_DISCO_L072CZ_LRWAN1/TARGET_STM/TARGET_STM32L0/i2c_device.h
- Revision:
- 143:86740a56073b
- Child:
- 170:e95d10626187
diff -r 4eea097334d6 -r 86740a56073b TARGET_DISCO_L072CZ_LRWAN1/TARGET_STM/TARGET_STM32L0/i2c_device.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_DISCO_L072CZ_LRWAN1/TARGET_STM/TARGET_STM32L0/i2c_device.h Fri May 26 12:30:20 2017 +0100 @@ -0,0 +1,90 @@ +/* mbed Microcontroller Library + ******************************************************************************* + * Copyright (c) 2015, STMicroelectronics + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ******************************************************************************* + */ +#ifndef MBED_I2C_DEVICE_H +#define MBED_I2C_DEVICE_H + +#include "cmsis.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef DEVICE_I2C + +#define I2C_IP_VERSION_V2 + +#if defined I2C1_BASE +#define I2C1_EV_IRQn I2C1_IRQn +#define I2C1_ER_IRQn I2C1_IRQn +#endif +#if defined I2C2_BASE +#define I2C2_EV_IRQn I2C2_IRQn +#define I2C2_ER_IRQn I2C2_IRQn +#endif +#if defined I2C3_BASE +#define I2C3_EV_IRQn I2C3_IRQn +#define I2C3_ER_IRQn I2C3_IRQn +#endif + +#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) + +/* Family specifc settings for clock source */ +#define I2CAPI_I2C1_CLKSRC RCC_I2C1CLKSOURCE_SYSCLK +#define I2CAPI_I2C3_CLKSRC RCC_I2C3CLKSOURCE_SYSCLK +#define I2CAPI_I2C4_CLKSRC RCC_I2C4CLKSOURCE_SYSCLK + +/* Provide the suitable timing depending on requested frequencie */ +static inline uint32_t get_i2c_timing(int hz) +{ + uint32_t tim = 0; + + switch (hz) { + case 100000: + tim = 0x20602938; // Standard mode with Rise Time = 400ns and Fall Time = 100ns + break; + case 400000: + tim = 0x00B0122A; // Fast mode with Rise Time = 250ns and Fall Time = 100ns + break; + case 1000000: + tim = 0x0030040E; // Fast mode Plus with Rise Time = 60ns and Fall Time = 100ns + break; + default: + break; + } + return tim; +} + +#ifdef __cplusplus +} +#endif + +#endif // DEVICE_I2C + +#endif