39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
#include "lv_port_tick.h"
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#include "lvgl.h"
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void TIM4_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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void TIM4_IRQHandler(void)
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{
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if(TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET) {
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lv_tick_inc(LV_TICK_PERIOD_MS);
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TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
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}
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}
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void lv_create_tick(void)
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{
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
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TIM_TimeBaseInitTypeDef timebase_conf;
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timebase_conf.TIM_ClockDivision = TIM_CKD_DIV1;
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timebase_conf.TIM_CounterMode = TIM_CounterMode_Up;
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timebase_conf.TIM_Period = LV_TICK_PERIOD_MS * 10 - 1;
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timebase_conf.TIM_Prescaler = SystemCoreClock / 10000 - 1;
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TIM_TimeBaseInit(TIM4, &timebase_conf);
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/* 开启溢出中断 */
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TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
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/* 设置TIM4溢出中断NVIC */
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NVIC_InitTypeDef nvic_conf;
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nvic_conf.NVIC_IRQChannel = TIM4_IRQn;
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nvic_conf.NVIC_IRQChannelPreemptionPriority = 1;
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nvic_conf.NVIC_IRQChannelSubPriority = 0;
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nvic_conf.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&nvic_conf);
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/* 开启TIM4 */
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TIM_Cmd(TIM4, ENABLE);
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}
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