diff options
Diffstat (limited to 'os/hal/src/pwm.c')
-rw-r--r-- | os/hal/src/pwm.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/os/hal/src/pwm.c b/os/hal/src/pwm.c new file mode 100644 index 000000000..ef4260629 --- /dev/null +++ b/os/hal/src/pwm.c @@ -0,0 +1,150 @@ +/*
+ 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 PWM.c
+ * @brief PWM Driver code.
+ * @addtogroup PWM
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+/**
+ * @brief PWM Driver initialization.
+ */
+void pwmInit(void) {
+
+ pwm_lld_init();
+}
+
+/**
+ * @brief Initializes the standard part of a @p PWMDriver structure.
+ *
+ * @param[in] pwmp pointer to the @p PWMDriver object
+ */
+void pwmObjectInit(PWMDriver *pwmp) {
+
+ pwmp->pd_state = PWM_STOP;
+ pwmp->pwm_config = NULL;
+}
+
+/**
+ * @brief Configures and activates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to the @p PWMDriver object
+ * @param[in] config pointer to the @p PWMConfig object
+ */
+void pwmStart(PWMDriver *pwmp, const PWMConfig *config) {
+
+ chDbgCheck((pwmp != NULL) && (config != NULL), "pwmStart");
+
+ chSysLock();
+ chDbgAssert((pwmp->pd_state == PWM_STOP) || (pwmp->pd_state == PWM_READY),
+ "pwmStart(), #1",
+ "invalid state");
+ pwmp->pd_config = config;
+ pwm_lld_start(pwmp);
+ pwmp->pd_state = PWM_READY;
+ chSysUnlock();
+}
+
+/**
+ * @brief Deactivates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to the @p PWMDriver object
+ */
+void pwmStop(PWMDriver *pwmp) {
+
+ chDbgCheck(pwmp != NULL, "pwmStop");
+
+ chSysLock();
+ chDbgAssert((pwmp->pd_state == PWM_STOP) || (pwmp->pd_state == PWM_READY),
+ "pwmStop(), #1",
+ "invalid state");
+ pwm_lld_stop(pwmp);
+ pwmp->pd_state = PWM_STOP;
+ chSysUnlock();
+}
+
+/**
+ * @brief Enables a callback mode for the specified PWM channel.
+ * @details The callback mode must be set before starting a PWM channel.
+ * + * @param[in] pwmp pointer to the @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ * @param[in] edge output edge mode + * @param[in] callback the callback function + */
+void pwmSetCallback(PWMDriver *pwmp, pwmchannel_t channel,
+ pwmedge_t edge, pwmcallback_t callback) {
+
+ chDbgCheck((pwmp != NULL) && (channel < PWM_CHANNELS),
+ "pwmSetCallback");
+
+ chSysLock();
+ chDbgAssert((pwmp->pd_state == PWM_READY) &&
+ !pwm_lld_is_enabled(pwmp, channel),
+ "pwmSetCallback(), #1", "invalid state");
+ pwm_lld_set_callback(pwmp, channel, edge, callback);
+ chSysUnlock();
+}
+
+/**
+ * @brief Enables a PWM channel.
+ * + * @param[in] pwmp pointer to the @p PWMDriver object
+ * @param[in] channel PWM channel identifier + * @param[in] width PWM pulse width as clock pulses number + */
+void pwmEnableChannel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width) {
+
+ chDbgCheck((pwmp != NULL) && (channel < PWM_CHANNELS),
+ "pwmEnableChannel");
+
+ chSysLock();
+ chDbgAssert(pwmp->pd_state == PWM_READY,
+ "pwmEnableChannel(), #1", "invalid state");
+ pwm_lld_enable_channel(pwmp, channel, width);
+ chSysUnlock();
+}
+
+/**
+ * @brief Disables a PWM channel.
+ * @details The channel output line is returned to its idle state and disabled.
+ * + * @param[in] pwmp pointer to the @p PWMDriver object
+ * @param[in] channel PWM channel identifier
+ */
+void pwmDisableChannel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ chDbgCheck((pwmp != NULL) && (channel < PWM_CHANNELS),
+ "pwmEnableChannel");
+
+ chSysLock();
+ chDbgAssert(pwmp->pd_state == PWM_READY,
+ "pwmDisableChannel(), #1", "invalid state");
+ pwm_lld_disable_channel(pwmp, channel);
+ chSysUnlock();
+}
+
+/** @} */
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