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-rw-r--r--os/hal/platforms/STM32/pwm_lld.c164
-rw-r--r--os/hal/platforms/STM32/pwm_lld.h157
2 files changed, 321 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/pwm_lld.c b/os/hal/platforms/STM32/pwm_lld.c
new file mode 100644
index 000000000..d816aa47a
--- /dev/null
+++ b/os/hal/platforms/STM32/pwm_lld.c
@@ -0,0 +1,164 @@
+/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/pwm_lld.c
+ * @brief STM32 PWM subsystem low level driver header.
+ * @addtogroup STM32_PWM
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if CH_HAL_USE_PWM || defined(__DOXYGEN__)
+
+/** @brief PWM1 driver identifier.*/
+#if defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
+PWMDriver PWMD1;
+#endif
+
+/*===========================================================================*/
+/* Low Level Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Low Level Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level PWM driver initialization.
+ */
+void pwm_lld_init(void) {
+
+#if USE_STM32_PWM1
+ /* TIM1 reset, ensures reset state in order to avoid trouble with JTAGs.*/
+ RCC->APB2RSTR = RCC_APB2RSTR_TIM1RST;
+ RCC->APB2RSTR = 0;
+
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD1);
+#endif
+
+}
+
+/**
+ * @brief Configures and activates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ */
+void pwm_lld_start(PWMDriver *pwmp) {
+
+ if (pwmp->pd_state == PWM_STOP) {
+ /* Clock activation.*/
+#if USE_STM32_PWM1
+ if (&PWMD1 == pwmp) {
+ NVICEnableVector(TIM1_CC_IRQn, STM32_PWM1_IRQ_PRIORITY);
+ RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;
+ }
+#endif
+ }
+ /* Configuration.*/
+}
+
+/**
+ * @brief Deactivates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ */
+void pwm_lld_stop(PWMDriver *pwmp) {
+
+ /* If in ready state then disables the PWM clock.*/
+ if (pwmp->pd_state == PWM_READY) {
+#if USE_STM32_PWM1
+ if (&PWMD1 == pwmp) {
+ NVICDisableVector(TIM1_CC_IRQn);
+ RCC->APB2ENR &= ~RCC_APB2ENR_TIM1EN;
+ }
+#endif
+ }
+}
+
+/**
+ * @brief Determines whatever the PWM channel is already enabled.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ *
+ * @return The PWM channel status.
+ * @retval FALSE the channel is not enabled.
+ * @retval TRUE the channel is enabled.
+ */
+bool_t pwm_lld_is_enabled(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ return (pwmp->pd_enabled_channels & (1 << channel)) != 0;
+}
+
+/**
+ * @brief Setups a PWM channel.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ */
+void pwm_lld_setup_channel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+}
+
+/**
+ * @brief Enables a PWM channel.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ * @param[in] width PWM pulse width as clock pulses number
+ */
+void pwm_lld_enable_channel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width) {
+
+ pwmp->pd_enabled_channels |= (1 << channel);
+}
+
+/**
+ * @brief Disables a PWM channel.
+ * @details The channel is disabled and its output line returned to the
+ * idle state.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ */
+void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ pwmp->pd_enabled_channels &= ~(1 << channel);
+}
+
+#endif /* CH_HAL_USE_PWM */
+
+/** @} */
diff --git a/os/hal/platforms/STM32/pwm_lld.h b/os/hal/platforms/STM32/pwm_lld.h
new file mode 100644
index 000000000..4ce073aad
--- /dev/null
+++ b/os/hal/platforms/STM32/pwm_lld.h
@@ -0,0 +1,157 @@
+/*
+ ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
+
+ This file is part of ChibiOS/RT.
+
+ ChibiOS/RT is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ ChibiOS/RT is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file STM32/pwm_lld.h
+ * @brief STM32 PWM subsystem low level driver header.
+ * @addtogroup STM32_PWM
+ * @{
+ */
+
+#ifndef _PWM_LLD_H_
+#define _PWM_LLD_H_
+
+#if CH_HAL_USE_PWM || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/**
+ * @brief Number of PWM channels per PWM driver.
+ */
+#define PWM_CHANNELS 4
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief PWM1 driver enable switch.
+ * @details If set to @p TRUE the support for PWM1 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(USE_STM32_PWM1) || defined(__DOXYGEN__)
+#define USE_STM32_PWM1 TRUE
+#endif
+
+/**
+ * @brief PWM1 interrupt priority level setting.
+ * @note @p BASEPRI_KERNEL >= @p STM32_PWM1_IRQ_PRIORITY > @p PRIORITY_PENDSV.
+ */
+#if !defined(STM32_PWM1_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define STM32_PWM1_IRQ_PRIORITY 0x80
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief PWM channel type.
+ */
+typedef uint8_t pwmchannel_t;
+
+/**
+ * @brief PWM counter type.
+ */
+typedef uint16_t pwmcnt_t;
+
+/**
+ * @brief PWM driver configuration structure.
+ * @note It could be empty on some architectures.
+ */
+typedef struct {
+
+} PWMConfig;
+
+/**
+ * @brief PWM driver channel configuration structure.
+ * @note It could be empty on some architectures.
+ */
+typedef struct {
+ /**
+ * @brief Channel idle logic level.
+ */
+ pwmmode_t pcc_mode;
+ /**
+ * @brief Channel callback edges.
+ */
+ pwmedge_t pcc_edge;
+ /**
+ * @brief Channel callback pointer.
+ */
+ pwmcallback_t pcc_callback;
+ /* End of the mandatory fields.*/
+} PWMChannelConfig;
+
+/**
+ * @brief Structure representing a PWM driver.
+ */
+typedef struct {
+ /**
+ * @brief Driver state.
+ */
+ pwmstate_t pd_state;
+ /**
+ * @brief Current driver configuration data.
+ */
+ const PWMConfig *pd_config;
+ /**
+ * @brief Current channel configurations.
+ */
+ const PWMChannelConfig *pd_channel_configs[PWM_CHANNELS];
+ /* End of the mandatory fields.*/
+ /**
+ * @brief Bit mask of the enabled channels.
+ */
+ uint32_t pd_enabled_channels;
+} PWMDriver;
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+/** @cond never*/
+#if defined(USE_STM32_PWM1)
+extern PWMDriver PWMD1;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void pwm_lld_init(void);
+ void pwm_lld_start(PWMDriver *pwmp);
+ void pwm_lld_stop(PWMDriver *pwmp);
+ bool_t pwm_lld_is_enabled(PWMDriver *pwmp, pwmchannel_t channel);
+ void pwm_lld_setup_channel(PWMDriver *pwmp, pwmchannel_t channel);
+ void pwm_lld_enable_channel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width);
+ void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel);
+#ifdef __cplusplus
+}
+#endif
+/** @endcond*/
+
+#endif /* CH_HAL_USE_PWM */
+
+#endif /* _PWM_LLD_H_ */
+
+/** @} */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 21:06:56 +0000