From a84c32523cb971505e03ae73409839637d8706a9 Mon Sep 17 00:00:00 2001 From: Giovanni Di Sirio Date: Sat, 2 Apr 2016 08:31:39 +0000 Subject: STM32 LLD renaming done. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9208 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c | 239 ++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c (limited to 'os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c') diff --git a/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c b/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c new file mode 100644 index 000000000..e68b4de3f --- /dev/null +++ b/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c @@ -0,0 +1,239 @@ +/* + ChibiOS - Copyright (C) 2006..2016 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 STM32/EXTIv1/ext_lld.c + * @brief STM32 EXT subsystem low level driver source. + * + * @addtogroup EXT + * @{ + */ + +#include "hal.h" + +#if HAL_USE_EXT || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +/* Handling a difference in ST headers.*/ +#if defined(STM32L4XX) +#define EMR EMR1 +#define IMR IMR1 +#define PR PR1 +#define RTSR RTSR1 +#define FTSR FTSR1 +#endif + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/** + * @brief EXTD1 driver identifier. + */ +EXTDriver EXTD1; + +/*===========================================================================*/ +/* Driver local variables and types. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver local functions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Low level EXT driver initialization. + * + * @notapi + */ +void ext_lld_init(void) { + + /* Driver initialization.*/ + extObjectInit(&EXTD1); +} + +/** + * @brief Configures and activates the EXT peripheral. + * + * @param[in] extp pointer to the @p EXTDriver object + * + * @notapi + */ +void ext_lld_start(EXTDriver *extp) { + expchannel_t line; + + if (extp->state == EXT_STOP) + ext_lld_exti_irq_enable(); + + /* Configuration of automatic channels.*/ + for (line = 0; line < EXT_MAX_CHANNELS; line++) + if (extp->config->channels[line].mode & EXT_CH_MODE_AUTOSTART) + ext_lld_channel_enable(extp, line); + else + ext_lld_channel_disable(extp, line); +} + +/** + * @brief Deactivates the EXT peripheral. + * + * @param[in] extp pointer to the @p EXTDriver object + * + * @notapi + */ +void ext_lld_stop(EXTDriver *extp) { + + if (extp->state == EXT_ACTIVE) + ext_lld_exti_irq_disable(); + + EXTI->EMR = 0; + EXTI->IMR = STM32_EXTI_IMR_MASK; + EXTI->PR = ~STM32_EXTI_IMR_MASK; +#if STM32_EXTI_NUM_LINES > 32 + EXTI->IMR2 = STM32_EXTI_IMR2_MASK; + EXTI->PR2 = ~STM32_EXTI_IMR2_MASK; +#endif +} + +/** + * @brief Enables an EXT channel. + * + * @param[in] extp pointer to the @p EXTDriver object + * @param[in] channel channel to be enabled + * + * @notapi + */ +void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) { + uint32_t cmask = (1 << (channel & 0x1F)); + + /* Setting the associated GPIO for external channels.*/ + if (channel < 16) { + uint32_t n = channel >> 2; + uint32_t mask = ~(0xF << ((channel & 3) * 4)); + uint32_t port = ((extp->config->channels[channel].mode & + EXT_MODE_GPIO_MASK) >> + EXT_MODE_GPIO_OFF) << ((channel & 3) * 4); + +#if defined(STM32F1XX) + AFIO->EXTICR[n] = (AFIO->EXTICR[n] & mask) | port; +#else /* !defined(STM32F1XX) */ + SYSCFG->EXTICR[n] = (SYSCFG->EXTICR[n] & mask) | port; +#endif /* !defined(STM32F1XX) */ + } + +#if STM32_EXTI_NUM_LINES > 32 + if (channel < 32) { +#endif + /* Masked out lines must not be touched by this driver.*/ + if ((cmask & STM32_EXTI_IMR_MASK) != 0U) { + return; + } + + /* Programming edge registers.*/ + if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE) + EXTI->RTSR |= cmask; + else + EXTI->RTSR &= ~cmask; + if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE) + EXTI->FTSR |= cmask; + else + EXTI->FTSR &= ~cmask; + + /* Programming interrupt and event registers.*/ + if (extp->config->channels[channel].cb != NULL) { + EXTI->IMR |= cmask; + EXTI->EMR &= ~cmask; + } + else { + EXTI->EMR |= cmask; + EXTI->IMR &= ~cmask; + } +#if STM32_EXTI_NUM_LINES > 32 + } + else { + /* Masked out lines must not be touched by this driver.*/ + if ((cmask & STM32_EXTI_IMR2_MASK) != 0U) { + return; + } + + /* Programming edge registers.*/ + if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE) + EXTI->RTSR2 |= cmask; + else + EXTI->RTSR2 &= ~cmask; + if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE) + EXTI->FTSR2 |= cmask; + else + EXTI->FTSR2 &= ~cmask; + + /* Programming interrupt and event registers.*/ + if (extp->config->channels[channel].cb != NULL) { + EXTI->IMR2 |= cmask; + EXTI->EMR2 &= ~cmask; + } + else { + EXTI->EMR2 |= cmask; + EXTI->IMR2 &= ~cmask; + } + } +#endif +} + +/** + * @brief Disables an EXT channel. + * + * @param[in] extp pointer to the @p EXTDriver object + * @param[in] channel channel to be disabled + * + * @notapi + */ +void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) { + uint32_t cmask = (1 << (channel & 0x1F)); + + (void)extp; + +#if STM32_EXTI_NUM_LINES > 32 + if (channel < 32) { +#endif + EXTI->IMR &= ~cmask; + EXTI->EMR &= ~cmask; + EXTI->RTSR &= ~cmask; + EXTI->FTSR &= ~cmask; + EXTI->PR = cmask; +#if STM32_EXTI_NUM_LINES > 32 + } + else { + EXTI->IMR2 &= ~cmask; + EXTI->EMR2 &= ~cmask; + EXTI->RTSR2 &= ~cmask; + EXTI->FTSR2 &= ~cmask; + EXTI->PR2 = cmask; + } +#endif +} + +#endif /* HAL_USE_EXT */ + +/** @} */ -- cgit v1.2.3