From 32e57dac2e61e79b029593eb4d34d727bcc10678 Mon Sep 17 00:00:00 2001 From: iperry Date: Thu, 17 Dec 2009 02:37:07 +0000 Subject: Initial commit of library code, moved from leaftest repo git-svn-id: https://leaflabs.googlecode.com/svn/trunk/library@69 749a229e-a60e-11de-b98f-4500b42dc123 --- .../examples/TIM/ExtTrigger_Synchro/main.c | 291 +++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100755 src/stm32lib/examples/TIM/ExtTrigger_Synchro/main.c (limited to 'src/stm32lib/examples/TIM/ExtTrigger_Synchro/main.c') diff --git a/src/stm32lib/examples/TIM/ExtTrigger_Synchro/main.c b/src/stm32lib/examples/TIM/ExtTrigger_Synchro/main.c new file mode 100755 index 0000000..0ad57eb --- /dev/null +++ b/src/stm32lib/examples/TIM/ExtTrigger_Synchro/main.c @@ -0,0 +1,291 @@ +/******************** (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_ICInitTypeDef TIM_ICInitStructure; +TIM_OCInitTypeDef TIM_OCInitStructure; +ErrorStatus HSEStartUpStatus; + +/* Private function prototypes -----------------------------------------------*/ +void RCC_Configuration(void); +void NVIC_Configuration(void); +void GPIO_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(); + + /* Configure the GPIO ports */ + GPIO_Configuration(); + + /* Timers synchronisation in cascade mode with an external trigger ----- + 1/TIM2 is configured as Master Timer: + - Toggle Mode is used + - The TIM2 Enable event is used as Trigger Output + + 2/TIM2 is configured as Slave Timer for an external Trigger connected + to TIM2 TI2 pin (TIM2 CH2 configured as input pin): + - The TIM2 TI2FP2 is used as Trigger Input + - Rising edge is used to start and stop the TIM2: Gated Mode. + + 3/TIM3 is slave for TIM2 and Master for TIM4, + - Toggle Mode is used + - The ITR1(TIM2) is used as input trigger + - Gated mode is used, so start and stop of slave counter + are controlled by the Master trigger output signal(TIM2 enable event). + - The TIM3 enable event is used as Trigger Output. + + 4/TIM4 is slave for TIM3, + - Toggle Mode is used + - The ITR2(TIM3) is used as input trigger + - Gated mode is used, so start and stop of slave counter + are controlled by the Master trigger output signal(TIM3 enable event). + + The TIMxCLK is fixed to 72 MHZ, the Prescaler is equal to 2 so the TIMx clock counter + is equal to 24 MHz. + The Three Timers are running at: + TIMx frequency = TIMx clock counter/ 2*(TIMx_Period + 1) = 162.1 KHz. + + The starts and stops of the TIM2 counters are controlled by the + external trigger. + The TIM3 starts and stops are controlled by the TIM2, and the TIM4 + starts and stops are controlled by the TIM3. + -------------------------------------------------------------------- */ + + /* Time base configuration */ + TIM_TimeBaseStructure.TIM_Period = 73; + TIM_TimeBaseStructure.TIM_Prescaler = 2; + TIM_TimeBaseStructure.TIM_ClockDivision = 0; + TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; + + TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); + + TIM_TimeBaseStructure.TIM_Period = 73; + TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); + + TIM_TimeBaseStructure.TIM_Period = 73; + TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); + + /* Master Configuration in Toggle Mode */ + TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; + TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; + TIM_OCInitStructure.TIM_Pulse = 64; + TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; + + TIM_OC1Init(TIM2, &TIM_OCInitStructure); + + /* TIM2 Input Capture Configuration */ + TIM_ICInitStructure.TIM_Channel = TIM_Channel_2; + TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; + TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; + TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; + TIM_ICInitStructure.TIM_ICFilter = 0; + + TIM_ICInit(TIM2, &TIM_ICInitStructure); + + /* TIM2 Input trigger configuration: External Trigger connected to TI2 */ + TIM_SelectInputTrigger(TIM2, TIM_TS_TI2FP2); + TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Gated); + + /* Select the Master Slave Mode */ + TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable); + + /* Master Mode selection: TIM2 */ + TIM_SelectOutputTrigger(TIM2, TIM_TRGOSource_Enable); + + /* Slaves Configuration: Toggle Mode */ + TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle; + TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; + + TIM_OC1Init(TIM3, &TIM_OCInitStructure); + + TIM_OC1Init(TIM4, &TIM_OCInitStructure); + + /* Slave Mode selection: TIM3 */ + TIM_SelectInputTrigger(TIM3, TIM_TS_ITR1); + TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated); + + /* Select the Master Slave Mode */ + TIM_SelectMasterSlaveMode(TIM3, TIM_MasterSlaveMode_Enable); + + /* Master Mode selection: TIM3 */ + TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_Enable); + + /* Slave Mode selection: TIM4 */ + TIM_SelectInputTrigger(TIM4, TIM_TS_ITR2); + TIM_SelectSlaveMode(TIM4, TIM_SlaveMode_Gated); + + /* TIM enable counter */ + TIM_Cmd(TIM2, ENABLE); + TIM_Cmd(TIM3, ENABLE); + TIM_Cmd(TIM4, 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/2 */ + RCC_PCLK1Config(RCC_HCLK_Div2); + + /* 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) + {} + } + /* TIM2, TIM3 and TIM4 clock enable */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3 | + RCC_APB1Periph_TIM4, ENABLE); + + /* GPIOA and GPIOB clock enable */ + RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE); +} + +/******************************************************************************* +* Function Name : GPIO_Configuration +* Description : Configure the GPIO Pins. +* Input : None +* Output : None +* Return : None +*******************************************************************************/ +void GPIO_Configuration(void) +{ + GPIO_InitTypeDef GPIO_InitStructure; + + /* GPIOA Configuration: PA.00(TIM2 CH1) and PA.06(TIM3 CH1) as alternate function push-pull */ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_6; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; + + GPIO_Init(GPIOA, &GPIO_InitStructure); + + /* GPIOB Configuration: PB.06(TIM4 CH1) as alternate function push-pull */ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; + + GPIO_Init(GPIOB, &GPIO_InitStructure); + + /* GPIOA Configuration: PA.01(TIM2 CH2) */ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; + + GPIO_Init(GPIOA, &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****/ -- cgit v1.2.3