rusefi
/
ChibiOS
mirror of https://github.com/rusefi/ChibiOS.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Single APB variant. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@14316 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
This commit is contained in:
Giovanni Di Sirio 2021-04-25 07:55:43 +00:00
parent 8699cc7113
commit 0e274fc310
1 changed files with 111 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

111
os/hal/ports/STM32/LLD/RCCv1/stm32_apb.inc Normal file
View File

@ -0,0 +1,111 @@
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file RCCv1/stm32_apb.inc
* @brief Shared APB clock handler.
*
* @addtogroup STM32_APB_HANDLER
* @{
*/
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/**
* @name PPRE field bits definitions
* @{
*/
#define STM32_PPRE_MASK (7U << RCC_CFGR_PPRE_Pos)
#define STM32_PPRE_FIELD(n) ((n) << RCC_CFGR_PPRE_Pos)
#define STM32_PPRE_DIV1 STM32_PPRE_FIELD(0U)
#define STM32_PPRE_DIV2 STM32_PPRE_FIELD(4U)
#define STM32_PPRE_DIV4 STM32_PPRE_FIELD(5U)
#define STM32_PPRE_DIV8 STM32_PPRE_FIELD(6U)
#define STM32_PPRE_DIV16 STM32_PPRE_FIELD(7U)
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/* Registry checks for robustness.*/
/* Checks on configurations.*/
#if !defined(STM32_PPRE)
#error "STM32_PPRE not defined in mcuconf.h"
#endif
/* Input checks.*/
#if !defined(STM32_PCLK_MAX)
#error "STM32_PCLK_MAX not defined in hal_lld.h"
#endif
#if !defined(STM32_HCLK)
#error "STM32_HCLK not defined in hal_lld.h"
#endif
/**
* @brief APB frequency.
*/
#if (STM32_PPRE == STM32_PPRE_DIV1) || defined(__DOXYGEN__)
#define STM32_PCLK (STM32_HCLK / 1U)
#elif STM32_PPRE == STM32_PPRE_DIV2
#define STM32_PCLK (STM32_HCLK / 2U)
#elif STM32_PPRE == STM32_PPRE_DIV4
#define STM32_PCLK (STM32_HCLK / 4U)
#elif STM32_PPRE == STM32_PPRE_DIV8
#define STM32_PCLK (STM32_HCLK / 8U)
#elif STM32_PPRE == STM32_PPRE_DIV16
#define STM32_PCLK (STM32_HCLK / 16U)
#else
#error "invalid STM32_PPRE value specified"
#endif
/*
* APB1 frequency check.
*/
#if STM32_PCLK > STM32_PCLK_MAX
#error "STM32_PCLK exceeding maximum frequency (STM32_PCLK_MAX)"
#endif
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/** @} */