Merge pull request #3795 from LMESTM/fix_pwm_period_calc

Fix pwm period calc

Author: 0xc0170

targets/TARGET_STM/TARGET_STM32F0/pwmout_api.c

@@ -0,0 +1,62 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#include "cmsis.h"
+#include "pwmout_api.h"
+#include "pwmout_device.h"
+
+#ifdef DEVICE_PWMOUT
+
+const pwm_apb_map_t pwm_apb_map_table[] =
+{
+#if defined(TIM2_BASE)
+    {PWM_2, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM3_BASE)
+    {PWM_3, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM14_BASE)
+    {PWM_14, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM1_BASE)
+    {PWM_1, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM15_BASE)
+    {PWM_15, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM16_BASE)
+    {PWM_16, PWMOUT_ON_APB1},
+#endif
+#if defined(TIM17_BASE)
+    {PWM_17, PWMOUT_ON_APB1},
+#endif
+    {(PWMName) 0, PWMOUT_UNKNOWN}
+};
+
+#endif // DEVICE_PWMOUT

targets/TARGET_STM/TARGET_STM32F0/pwmout_device.c

@@ -0,0 +1,59 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2017, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#ifndef MBED_PWMOUT_DEVICE_H
+#define MBED_PWMOUT_DEVICE_H
+
+#include "cmsis.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef DEVICE_PWMOUT
+
+typedef enum {
+    PWMOUT_ON_APB1 = 0,
+    PWMOUT_UNKNOWN = 1
+} PwmoutApb;
+
+/*  Structure to describe Timers to APB */
+typedef struct pwm_apb_map {
+    PWMName pwm;   // an index entry for each EXIT line
+    PwmoutApb pwmoutApb;
+} pwm_apb_map_t;
+
+/*  there is only 1 APB clock in F0 family */
+#define PWMOUT_APB2_NOT_SUPPORTED
+
+extern const pwm_apb_map_t pwm_apb_map_table[];
+
+#endif // DEVICE_PWMOUT
+
+#endif