diff libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/7PWM_Output/main.c @ 0:c59513fd84fb

Initial commit of STM32 test code.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 03 Oct 2011 21:19:15 +1030
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/TIM/7PWM_Output/main.c	Mon Oct 03 21:19:15 2011 +1030
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+/**
+  ******************************************************************************
+  * @file    TIM/7PWM_Output/main.c 
+  * @author  MCD Application Team
+  * @version V3.5.0
+  * @date    08-April-2011
+  * @brief   Main program body
+  ******************************************************************************
+  * @attention
+  *
+  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+  *
+  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
+  ******************************************************************************
+  */ 
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x.h"
+
+/** @addtogroup STM32F10x_StdPeriph_Examples
+  * @{
+  */
+
+/** @addtogroup TIM_7PWM_Output
+  * @{
+  */ 
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
+TIM_OCInitTypeDef  TIM_OCInitStructure;
+uint16_t TimerPeriod = 0;
+uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel4Pulse = 0;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+
+/* Private functions ---------------------------------------------------------*/
+
+/**
+  * @brief   Main program
+  * @param  None
+  * @retval None
+  */
+int main(void)
+{
+  /*!< At this stage the microcontroller clock setting is already configured, 
+       this is done through SystemInit() function which is called from startup
+       file (startup_stm32f10x_xx.s) before to branch to application main.
+       To reconfigure the default setting of SystemInit() function, refer to
+       system_stm32f10x.c file
+     */     
+       
+  /* System Clocks Configuration */
+  RCC_Configuration();
+
+  /* GPIO Configuration */
+  GPIO_Configuration();
+
+  /* TIM1 Configuration ---------------------------------------------------
+   Generate 7 PWM signals with 4 different duty cycles:
+   TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
+   SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
+   and Connectivity line devices and to 24 MHz for Low-Density Value line and
+   Medium-Density Value line devices
+   
+   The objective is to generate 7 PWM signal at 17.57 KHz:
+     - TIM1_Period = (SystemCoreClock / 17570) - 1
+   The channel 1 and channel 1N duty cycle is set to 50%
+   The channel 2 and channel 2N duty cycle is set to 37.5%
+   The channel 3 and channel 3N duty cycle is set to 25%
+   The channel 4 duty cycle is set to 12.5%
+   The Timer pulse is calculated as follows:
+     - ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
+  ----------------------------------------------------------------------- */
+  /* Compute the value to be set in ARR regiter to generate signal frequency at 17.57 Khz */
+  TimerPeriod = (SystemCoreClock / 17570 ) - 1;
+  /* Compute CCR1 value to generate a duty cycle at 50% for channel 1 and 1N */
+  Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
+  /* Compute CCR2 value to generate a duty cycle at 37.5%  for channel 2 and 2N */
+  Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
+  /* Compute CCR3 value to generate a duty cycle at 25%  for channel 3 and 3N */
+  Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
+  /* Compute CCR4 value to generate a duty cycle at 12.5%  for channel 4 */
+  Channel4Pulse = (uint16_t) (((uint32_t) 125 * (TimerPeriod- 1)) / 1000);
+
+  /* Time Base configuration */
+  TIM_TimeBaseStructure.TIM_Prescaler = 0;
+  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
+  TIM_TimeBaseStructure.TIM_Period = TimerPeriod;
+  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
+  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
+
+  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
+
+  /* Channel 1, 2,3 and 4 Configuration in PWM mode */
+  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
+  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
+  TIM_OCInitStructure.TIM_Pulse = Channel1Pulse;
+  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
+  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
+  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
+  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
+
+  TIM_OC1Init(TIM1, &TIM_OCInitStructure);
+
+  TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;
+  TIM_OC2Init(TIM1, &TIM_OCInitStructure);
+
+  TIM_OCInitStructure.TIM_Pulse = Channel3Pulse;
+  TIM_OC3Init(TIM1, &TIM_OCInitStructure);
+
+  TIM_OCInitStructure.TIM_Pulse = Channel4Pulse;
+  TIM_OC4Init(TIM1, &TIM_OCInitStructure);
+
+  /* TIM1 counter enable */
+  TIM_Cmd(TIM1, ENABLE);
+
+  /* TIM1 Main Output Enable */
+  TIM_CtrlPWMOutputs(TIM1, ENABLE);
+
+  while (1)
+  {}
+}
+
+/**
+  * @brief  Configures the different system clocks.
+  * @param  None
+  * @retval None
+  */
+void RCC_Configuration(void)
+{
+  /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */
+  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOE|
+                         RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE);
+}
+
+/**
+  * @brief  Configure the TIM1 Pins.
+  * @param  None
+  * @retval None
+  */
+void GPIO_Configuration(void)
+{
+  GPIO_InitTypeDef GPIO_InitStructure;
+
+#ifdef STM32F10X_CL
+  /* GPIOE Configuration: Channel 1/1N, 2/2N, 3/3N and 4 as alternate function push-pull */
+  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14|
+                                GPIO_Pin_8|GPIO_Pin_10|GPIO_Pin_12;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+
+  GPIO_Init(GPIOE, &GPIO_InitStructure);
+
+  /* TIM1 Full remapping pins */
+  GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE); 
+
+#else
+  /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
+  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+  GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+  /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
+  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
+  GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+#endif
+}
+
+#ifdef  USE_FULL_ASSERT
+
+/**
+  * @brief  Reports the name of the source file and the source line number
+  *         where the assert_param error has occurred.
+  * @param  file: pointer to the source file name
+  * @param  line: assert_param error line source number
+  * @retval None
+  */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+  /* User can add his own implementation to report the file name and line number,
+     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+  while (1)
+  {}
+}
+
+#endif
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/