diff options
Diffstat (limited to 'Libraries/LTimers/ltimers_config.c')
| -rw-r--r-- | Libraries/LTimers/ltimers_config.c | 50 |
1 files changed, 12 insertions, 38 deletions
diff --git a/Libraries/LTimers/ltimers_config.c b/Libraries/LTimers/ltimers_config.c index 069a6ca..a30b36f 100644 --- a/Libraries/LTimers/ltimers_config.c +++ b/Libraries/LTimers/ltimers_config.c @@ -4,42 +4,16 @@ // ---------------------------------------------------------------------------- -// 1 +// Инициализация аппаратного таймера для генерирования прерываний каждую 1мс // ---------------------------------------------------------------------------- void LTimersConfig ( void ) { -// NVIC_InitTypeDef NVIC_InitStructure; -// TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; -// -// /* TIM6 clock enable */ -// RCC_APB1PeriphClockCmd ( RCC_APB1Periph_TIM6 , ENABLE ); -// -// /* Enable the TIM6 global Interrupt */ -// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; -// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; -// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; -// NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn; -// NVIC_Init ( &NVIC_InitStructure ); -// -// /* Configure TIM6 to generate interrupt each 1ms */ -// TIM_TimeBaseStructure.TIM_Period = 1000; -// TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/1000000)-1; -// TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; -// TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; -// TIM_TimeBaseInit ( TIM6, &TIM_TimeBaseStructure ); -// -// /* TIM6 IT enable */ -// TIM_ITConfig ( TIM6, TIM_IT_Update , ENABLE ); -// -// /* TIM6 enable counter */ -// TIM_Cmd ( TIM6, ENABLE ); - NVIC_InitTypeDef NVIC_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; - + /* LTIMER_TIMx clock enable */ LTIMER_RCC_APBxPeriphClockCmd ( LTIMER_TIM_RCC, ENABLE ); - + /* Enable the LTIMER_TIMx gloabal Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = LTIMER_TIM_IRQx; NVIC_InitStructure.NVIC_IRQChannelPriority = 1; @@ -49,34 +23,34 @@ void LTimersConfig ( void ) /* ----------------------------------------------------------------------- In this example TIM7 counter clock (TIM7CLK) is set to APB1 clock (PCLK1), since APB1 prescaler is set to 1 and TIM7 prescaler is set to 0. - - In this example TIM7 input clock (TIM7CLK) is set to APB1 clock (PCLK1), - since APB1 prescaler is set to 1. + + In this example TIM7 input clock (TIM7CLK) is set to APB1 clock (PCLK1), + since APB1 prescaler is set to 1. TIM7CLK = PCLK1 = HCLK = SystemCoreClock - + With Prescaler set to 479 and Period to 24999, the TIM7 counter is updated each 250 ms (i.e. and interrupt is generated each 250 ms) TIM7 counter clock = TIM7CLK /((Prescaler + 1)*(Period + 1)) = 48 MHz / ((25000)*(480)) - = 4 Hz + = 4 Hz ==> TIM7 counter period = 250 ms Note: SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f0xx.c file. Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate() function to update SystemCoreClock variable value. Otherwise, any configuration - based on this variable will be incorrect. - ----------------------------------------------------------------------- */ + based on this variable will be incorrect. + ----------------------------------------------------------------------- */ /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = 1000; //24999; TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/1000000)-1; //479; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit ( LTIMER_TIMx, &TIM_TimeBaseStructure ); - + /* LTIMER_TIMx Interrupts enable */ TIM_ITConfig ( LTIMER_TIMx, TIM_IT_Update, ENABLE ); - + /* LTIMER_TIMx enable counter */ TIM_Cmd ( LTIMER_TIMx, ENABLE ); } |