mbed-src - mbed library sources

Users » todotani » Code » mbed-src
mbed library sources
Diff: targets/hal/TARGET_STM/TARGET_STM32F407VG/pwmout_api.c

Revision:: 296:ec1b66a3d094
Parent:: 285:31249416b6f9
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_STM/TARGET_STM32F407VG/pwmout_api.c	Thu Aug 21 15:00:08 2014 +0100
@@ -0,0 +1,290 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2014, 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 "pwmout_api.h"
+
+#if DEVICE_PWMOUT
+
+#include "cmsis.h"
+#include "pinmap.h"
+#include "mbed_error.h"
+
+// TIM5 cannot be used because already used by the us_ticker
+static const PinMap PinMap_PWM[] = {
+    {PA_0,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
+//  {PA_0,  PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
+    {PA_1,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
+//  {PA_1,  PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
+    {PA_2,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
+//  {PA_2,  PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
+//  {PA_2,  PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
+    {PA_3,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
+//  {PA_3,  PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
+//  {PA_3,  PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
+    {PA_5,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
+    {PA_6,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
+    {PA_7,  PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
+//  {PA_7,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
+    {PA_8,  PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1
+    {PA_9,  PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2
+    {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3
+    {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH4
+    {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
+
+    {PB_0,  PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)},  // TIM1_CH2N
+//  {PB_0,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH3
+    {PB_1,  PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)},  // TIM1_CH3N
+//  {PB_1,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH4
+    {PB_3,  PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)},  // TIM2_CH2
+    {PB_4,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH1
+    {PB_5,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH2
+    {PB_6,  PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)},  // TIM4_CH1
+    {PB_7,  PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)},  // TIM4_CH2
+    {PB_8,  PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)},  // TIM4_CH3
+//  {PB_8,  PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
+    {PB_9,  PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)},  // TIM4_CH4
+//  {PB_9,  PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
+    {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)},  // TIM2_CH3
+    {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)},  // TIM1_CH1N
+    {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)},  // TIM1_CH2N
+    {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)},  // TIM1_CH3N
+    
+    {PC_6,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH1
+    {PC_7,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH2
+    {PC_8,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH3
+    {PC_9,  PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)},  // TIM3_CH4
+    
+    {NC,    NC,    0}
+};
+
+static TIM_HandleTypeDef TimHandle;
+static uint8_t ClockDivider;
+/*                               0, 1, 2, 3, 4, 5, 6, 7     */ 
+const uint8_t APBxPrescTable[]={ 0, 0, 0, 0, 1, 2, 3, 4 };
+extern const uint8_t AHBPrescTable[];
+
+void pwmout_init(pwmout_t* obj, PinName pin) {  
+    // Get the peripheral name from the pin and assign it to the object
+    obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
+
+    if (obj->pwm == (PWMName)NC) {
+        error("PWM error: pinout mapping failed.");
+    }
+
+    // Enable TIM clock
+	/* APB1 Timers */
+    if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
+    if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
+    if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
+	/* APB2 Timers */
+    if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();	
+    if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();		
+    if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
+    if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
+	/* Decide APBx divider for timer base clock 
+	 * Auto detect the Clockdivider value according to AHB,APB1 and APB2 prescaler register.
+	 */
+	ClockDivider = AHBPrescTable[ ( ( RCC->CFGR & RCC_CFGR_HPRE ) >> 4 ) ];
+	switch( obj->pwm ) {
+		/* APB1 low clock */
+		case PWM_2:
+		case PWM_3:
+		case PWM_4:
+			ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE1 ) >> 13 ) ];
+			break;
+		/* APB2 fast clock */
+		case PWM_1:
+		case PWM_9:
+		case PWM_10:
+		case PWM_11:
+			ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE2 ) >> 10 ) ];
+			break;
+		default:
+			break;
+	} 
+    
+    // Configure GPIO
+    pinmap_pinout(pin, PinMap_PWM);
+    
+    obj->pin = pin;
+    obj->period = 0;
+    obj->pulse = 0;
+    
+    pwmout_period_us(obj, 20000); // 20 ms per default
+}
+
+void pwmout_free(pwmout_t* obj) {
+    // Configure GPIO
+    pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));    
+}
+
+void pwmout_write(pwmout_t* obj, float value) {
+    TIM_OC_InitTypeDef sConfig;
+    int channel = 0;
+    int complementary_channel = 0;
+
+    TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
+  
+    if (value < (float)0.0) {
+        value = 0.0;
+    } else if (value > (float)1.0) {
+        value = 1.0;
+    }
+   
+    obj->pulse = (uint32_t)((float)obj->period * value);
+
+    // Configure channels    
+    sConfig.OCMode       = TIM_OCMODE_PWM1;
+    sConfig.Pulse        = obj->pulse;
+    sConfig.OCPolarity   = TIM_OCPOLARITY_HIGH;
+    sConfig.OCNPolarity  = TIM_OCNPOLARITY_HIGH;    
+    sConfig.OCFastMode   = TIM_OCFAST_DISABLE;
+    sConfig.OCIdleState  = TIM_OCIDLESTATE_RESET;
+    sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
+
+    switch (obj->pin) {
+        // Channels 1
+        case PA_0:
+        case PA_5:
+        case PA_6:
+        case PA_8:
+        case PA_15:
+        case PB_4:
+        case PB_6:
+        case PC_6:          
+            channel = TIM_CHANNEL_1;
+            break;
+        // Channels 1N
+        case PA_7:
+        case PB_13:
+            channel = TIM_CHANNEL_1;
+            complementary_channel = 1;
+            break;
+        // Channels 2
+        case PA_1:
+        case PA_9:
+        case PB_3:
+        case PB_5:
+        case PB_7:
+        case PC_7:          
+            channel = TIM_CHANNEL_2;
+            break;
+        // Channels 2N
+        case PB_0:
+        case PB_14:          
+            channel = TIM_CHANNEL_2;
+            complementary_channel = 1;
+            break;
+        // Channels 3
+        case PA_2:
+        case PA_10:
+        case PB_8:
+        case PB_10:
+        case PC_8:
+            channel = TIM_CHANNEL_3;
+            break;
+        // Channels 3N
+        case PB_1:
+        case PB_15:          
+            channel = TIM_CHANNEL_3;
+            complementary_channel = 1;
+            break;
+        // Channels 4
+        case PA_3:
+        case PA_11:
+        case PB_9:          
+        case PC_9:          
+            channel = TIM_CHANNEL_4;
+            break;        
+        default:
+            return;
+    }
+    
+    HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
+    if (complementary_channel) {
+        HAL_TIMEx_PWMN_Start(&TimHandle, channel);
+    } else {
+        HAL_TIM_PWM_Start(&TimHandle, channel);
+    }
+}
+
+float pwmout_read(pwmout_t* obj) {
+    float value = 0;
+    if (obj->period > 0) {
+        value = (float)(obj->pulse) / (float)(obj->period);
+    }
+    return ((value > (float)1.0) ? (float)(1.0) : (value));
+}
+
+void pwmout_period(pwmout_t* obj, float seconds) {
+    pwmout_period_us(obj, seconds * 1000000.0f);
+}
+
+void pwmout_period_ms(pwmout_t* obj, int ms) {
+    pwmout_period_us(obj, ms * 1000);
+}
+
+void pwmout_period_us(pwmout_t* obj, int us) {
+    TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
+
+    float dc = pwmout_read(obj);
+  
+    __HAL_TIM_DISABLE(&TimHandle);
+      
+    // Update the SystemCoreClock variable
+    SystemCoreClockUpdate();
+    TimHandle.Init.Period        = us - 1;
+    TimHandle.Init.Prescaler     = (uint16_t)( ( SystemCoreClock >> ClockDivider ) / 1000000) - 1; // 1 µs tick
+    TimHandle.Init.ClockDivision = 0;
+    TimHandle.Init.CounterMode   = TIM_COUNTERMODE_UP;
+    HAL_TIM_PWM_Init(&TimHandle);
+
+    // Set duty cycle again
+    pwmout_write(obj, dc);
+
+    // Save for future use  
+    obj->period = us;
+  
+    __HAL_TIM_ENABLE(&TimHandle);
+}
+
+void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
+    pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
+}
+
+void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
+    pwmout_pulsewidth_us(obj, ms * 1000);
+}
+
+void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
+    float value = (float)us / (float)obj->period;
+    pwmout_write(obj, value);
+}
+
+#endif
Repository toolbox

Export to desktop IDE
Repository details

Type:	Library
Created:	05 Sep 2014
Imports:	4
Forks:	0
Commits:	309
Dependents:	0
Dependencies:	0
Followers:	1
Diff: targets/hal/TARGET_STM/TARGET_STM32F407VG/pwmout_api.c

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning
