GD32定时器无法使用外部脉冲计数

只看该作者 · 2022-12-21 11:05

GD32定时器无法使用ETI计数，同一个芯片，使用stm32的库则正常运行，没有问题，GD32库代码如下
static void Timer_Rcu_NvicIrq_Init(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);
rcu_periph_clock_enable(RCU_TIMER1);
}

static void Timer_Gpio_Init(void)
{
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
}

static void Timer_Config(void)
{
timer_parameter_struct timer_initpara;
// timer_ic_parameter_struct timer_icinitpara;

timer_deinit(TIMER1);
/* initialize TIMER init parameter struct */
timer_struct_para_init(&timer_initpara);
/* TIMER1 configuration */
timer_initpara.prescaler = 0;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 0xffff;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_init(TIMER1, &timer_initpara);

/* slave mode selection : TIMER1 */
/* TIMER1 input trigger : external trigger connected to CI0 */
timer_input_trigger_source_select(TIMER1, TIMER_SMCFG_TRGSEL_CI0FE0);
timer_slave_mode_select(TIMER1, TIMER_SLAVE_MODE_EXTERNAL0);
timer_external_clock_mode1_config(TIMER1, TIMER_EXT_TRI_PSC_OFF, TIMER_ETP_RISING, 0);

timer_enable(TIMER1);
}

只看该作者 · 2022-12-21 11:05

static void Timer_Rcu_NvicIrq_Init(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);
rcu_periph_clock_enable(RCU_TIMER1);
}

static void Timer_Gpio_Init(void)
{
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0);
}

static void Timer_Config(void)
{
timer_parameter_struct timer_initpara;
// timer_ic_parameter_struct timer_icinitpara;

timer_deinit(TIMER1);
/* initialize TIMER init parameter struct */
timer_struct_para_init(&timer_initpara);
/* TIMER1 configuration */
timer_initpara.prescaler = 0;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 0xffff;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_init(TIMER1, &timer_initpara);

/* slave mode selection : TIMER1 */
/* TIMER1 input trigger : external trigger connected to CI0 */
timer_input_trigger_source_select(TIMER1, TIMER_SMCFG_TRGSEL_CI0FE0);
timer_slave_mode_select(TIMER1, TIMER_SLAVE_MODE_EXTERNAL0);
timer_external_clock_mode1_config(TIMER1, TIMER_EXT_TRI_PSC_OFF, TIMER_ETP_RISING, 0);

timer_enable(TIMER1);
}

只看该作者 · 2022-12-21 15:28

yangfrch 发表于 2022-12-21 11:05
static void Timer_Rcu_NvicIrq_Init(void)
{
rcu_periph_clock_enable(RCU_GPIOA);

定时器中的正常输入则么没有配置？
timer_icintpara.icfilter=0U;
timer_icintpara.icpolarity=TIMER_IC_POLARITY_RISING;
// timer_icintpara.icpolarity=TIMER_IC_POLARITY_FALLING;
// timer_icintpara.icpolarity=TIMER_IC_POLARITY_BOTH_EDGE;
timer_icintpara.icprescaler=TIMER_IC_PSC_DIV4;
timer_icintpara.icselection=TIMER_IC_SELECTION_DIRECTTI;
timer_input_capture_config(timer,TIMER_CH_0,&timer_icintpara); // 配置通道0

只看该作者 · 2022-12-21 15:36

yangfrch 发表于 2022-12-21 11:05
static void Timer_Rcu_NvicIrq_Init(void)
{
rcu_periph_clock_enable(RCU_GPIOA);

看错了，你是要ETI脉冲计数是吧，TIMER1的 CI0和ETI使用的同一个输入引脚，不建议
timer_input_trigger_source_select（定时器1，TIMER_SMCFG_TRGSEL_CI0FE0）;
timer_external_clock_mode1_config（定时器1， TIMER_EXT_TRI_PSC_OFF， TIMER_ETP_RISING，
0）这样使用