STM32定时器触发DMA采集捕获输入值

1、int main( void )/系统初始化/system_init( );/时钟初始化drv_rcc_init( 0, 0, 64, APB1_PRESC_2, APB2_PRESC_1, 0x );hal_timer_init( 5000 );/TIM1配置为 编码器模式 DMA触发请求为外部其他定时的触发输出/TIM4 配置为触发输出 用于定时器给一个触发信号到TIM1/输入通道引脚初始化drv_rcc_ahb1_clk_enable( RCC_AHBENR_GPIOEEN );drv_gpio_alternate_function_init( GPIOE, GPIO_PIN_9, GP

2、IO_PUPD_PULL, GPIO_OTYPE_OD, GPIO_SPEED_MID );drv_gpio_alternate_function_init( GPIOE, GPIO_PIN_11, GPIO_PUPD_PULL, GPIO_OTYPE_OD, GPIO_SPEED_MID );drv_gpio_alternate_function_connect( GPIOE, GPIO_PINSOURCE9, GPIO_AF2_TIM1 );drv_gpio_alternate_function_connect( GPIOE, GPIO_PINSOURCE11, GPIO_AF2_TIM1

3、 );/TIM1初始化drv_rcc_apb2_clk_enable( RCC_APB2ENR_TIM1EN );drv_timer_base_init( TIM1, 0, 0xFFFF, TIM_EDGE_CNT_MODE_UP );drv_timer_select_input_trigger( TIM1, TIM_TS_ITR3 );drv_timer_select_slave_mode( TIM1, TIM_SLAVE_MODE_EQEP_3 );/ TIM_SLAVE_MODE_TRIGGER/输入通道配置drv_timer_ic1_init( TIM1, TIM_IC_POLARIT

4、Y_RISING, TIM_IC_PSC_DIV_1, TIM_IC_SELECTION_1, Filter_NO );drv_timer_ic2_init( TIM1, TIM_IC_POLARITY_RISING, TIM_IC_PSC_DIV_1, TIM_IC_SELECTION_1, Filter_NO );drv_timer_ic1_enable( TIM1 );drv_timer_ic2_enable( TIM1 );/TIM定时器配置TIM1-DIER.bit.TDE = 1;/使能触发 DMA请求TIM1-DCR.bit.DBL = 0;/传输个数TIM1-DCR.bit.D

5、BA = 9;/基地址为TIM1-CNT/TIM1 DMA初始化 DMA1 CHANNEL4 :TIM1_TRIGdrv_rcc_ahb1_clk_enable( RCC_AHBENR_DMA1EN );drv_dma_stream_deinit( DMA1_Channel4 );drv_dma_stream_init( DMA1_Channel4, (UINT32)g_TimerCntBuffer, (UINT32)(&( TIM1-CNT ), 5, DMA_CIRC_MODE_ENABLE, DMA_CHANNEL_PRIORITY_VERY_HIGH, DMA_DIR_PERIPH_TO_MEM, DMA_DATA_WIDTH_WORD );drv_dma_stream_enable( DMA1_Channel4 );/TIM4初始化drv_rcc_apb1_clk_enable( RCC_APB1ENR_TIM4EN );drv_timer_base_init( TIM4, , 5000, TIM_EDGE_CNT_MODE_UP );drv_timer_select_output_trigger( TIM4, TIM_TRGOSource_Update );/根