1 files changed, 157 insertions, 0 deletions
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_ */
+
+/** @} */