diff options
Diffstat (limited to 'src/stm32lib/examples/TIM/PWM_Output/main.c')
| -rwxr-xr-x | src/stm32lib/examples/TIM/PWM_Output/main.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/stm32lib/examples/TIM/PWM_Output/main.c b/src/stm32lib/examples/TIM/PWM_Output/main.c new file mode 100755 index 0000000..68be8b2 --- /dev/null +++ b/src/stm32lib/examples/TIM/PWM_Output/main.c @@ -0,0 +1,245 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : main.c
+* Author : MCD Application Team
+* Version : V2.0.1
+* Date : 06/13/2008
+* Description : Main program body
+********************************************************************************
+* 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.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_lib.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
+TIM_OCInitTypeDef TIM_OCInitStructure;
+u16 CCR1_Val = 500;
+u16 CCR2_Val = 375;
+u16 CCR3_Val = 250;
+u16 CCR4_Val = 125;
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void GPIO_Configuration(void);
+void NVIC_Configuration(void);
+
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : main
+* Description : Main program
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+int main(void)
+{
+#ifdef DEBUG
+ debug();
+#endif
+
+ /* System Clocks Configuration */
+ RCC_Configuration();
+
+ /* NVIC Configuration */
+ NVIC_Configuration();
+
+ /* GPIO Configuration */
+ GPIO_Configuration();
+
+ /* -----------------------------------------------------------------------
+ TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles:
+ TIM3CLK = 36 MHz, Prescaler = 0x0, TIM3 counter clock = 36 MHz
+ TIM3 ARR Register = 999 => TIM3 Frequency = TIM3 counter clock/(ARR + 1)
+ TIM3 Frequency = 36 KHz.
+ TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR)* 100 = 50%
+ TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR)* 100 = 37.5%
+ TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR)* 100 = 25%
+ TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR)* 100 = 12.5%
+ ----------------------------------------------------------------------- */
+
+ /* Time base configuration */
+ TIM_TimeBaseStructure.TIM_Period = 999;
+ TIM_TimeBaseStructure.TIM_Prescaler = 0;
+ TIM_TimeBaseStructure.TIM_ClockDivision = 0;
+ TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
+
+ TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
+
+ /* PWM1 Mode configuration: Channel1 */
+ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
+ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+ TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
+ TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
+
+ TIM_OC1Init(TIM3, &TIM_OCInitStructure);
+
+ TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
+
+ /* PWM1 Mode configuration: Channel2 */
+ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+ TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
+
+ TIM_OC2Init(TIM3, &TIM_OCInitStructure);
+
+ TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
+
+ /* PWM1 Mode configuration: Channel3 */
+ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+ TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
+
+ TIM_OC3Init(TIM3, &TIM_OCInitStructure);
+
+ TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
+
+ /* PWM1 Mode configuration: Channel4 */
+ TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+ TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
+
+ TIM_OC4Init(TIM3, &TIM_OCInitStructure);
+
+ TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
+
+ TIM_ARRPreloadConfig(TIM3, ENABLE);
+
+ /* TIM3 enable counter */
+ TIM_Cmd(TIM3, ENABLE);
+
+ while (1)
+ {}
+}
+
+/*******************************************************************************
+* Function Name : RCC_Configuration
+* Description : Configures the different system clocks.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void RCC_Configuration(void)
+{
+ /* RCC system reset(for debug purpose) */
+ RCC_DeInit();
+
+ /* Enable HSE */
+ RCC_HSEConfig(RCC_HSE_ON);
+
+ /* Wait till HSE is ready */
+ HSEStartUpStatus = RCC_WaitForHSEStartUp();
+
+ if (HSEStartUpStatus == SUCCESS)
+ {
+ /* Enable Prefetch Buffer */
+ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
+
+ /* Flash 2 wait state */
+ FLASH_SetLatency(FLASH_Latency_2);
+
+ /* HCLK = SYSCLK */
+ RCC_HCLKConfig(RCC_SYSCLK_Div1);
+
+ /* PCLK2 = HCLK */
+ RCC_PCLK2Config(RCC_HCLK_Div1);
+
+ /* PCLK1 = HCLK/4 */
+ RCC_PCLK1Config(RCC_HCLK_Div4);
+
+ /* PLLCLK = 8MHz * 9 = 72 MHz */
+ RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
+
+ /* Enable PLL */
+ RCC_PLLCmd(ENABLE);
+
+ /* Wait till PLL is ready */
+ while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
+ {}
+
+ /* Select PLL as system clock source */
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
+
+ /* Wait till PLL is used as system clock source */
+ while (RCC_GetSYSCLKSource() != 0x08)
+ {}
+ }
+
+ /* TIM3 clock enable */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
+
+ /* GPIOA and GPIOB clock enable */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);
+
+}
+
+/*******************************************************************************
+* Function Name : GPIO_Configuration
+* Description : Configure the TIM3 Ouput Channels.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /*GPIOA Configuration: TIM3 channel 1 and 2 as alternate function push-pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+
+ GPIO_Init(GPIOA, &GPIO_InitStructure);
+
+ /*GPIOB Configuration: TIM3 channel 3 and 4 as alternate function push-pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
+
+ GPIO_Init(GPIOB, &GPIO_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : NVIC_Configuration
+* Description : Configures Vector Table base location.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void NVIC_Configuration(void)
+{
+#ifdef VECT_TAB_RAM
+ /* Set the Vector Table base location at 0x20000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
+#else /* VECT_TAB_FLASH */
+ /* Set the Vector Table base location at 0x08000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
+#endif
+}
+
+#ifdef DEBUG
+/*******************************************************************************
+* Function Name : assert_failed
+* Description : Reports the name of the source file and the source line number
+* where the assert_param error has occurred.
+* Input : - file: pointer to the source file name
+* - line: assert_param error line source number
+* Output : None
+* Return : None
+*******************************************************************************/
+void assert_failed(u8* file, u32 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 2008 STMicroelectronics *****END OF FILE****/
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