62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
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#include "stm32_sys.h"
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#include "u_types.h"
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#include "u_prot.h"
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#include "u_factory.h"
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#include "u_hd_man.h"
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#include "u_irq_sender.h"
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#include "u_mm.h"
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#include "u_log.h"
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#include "u_local_thread.h"
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#include <assert.h>
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#define IRQ_THREAD_PRIO 3
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#define STACK_SIZE 512
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static __attribute__((aligned(8))) uint8_t stack0[STACK_SIZE];
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static obj_handler_t obj;
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static void *TIM2_IRQHandler(void *arg);
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void timer_init(void)
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{
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obj = handler_alloc();
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assert(obj != HANDLER_INVALID);
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msg_tag_t tag = factory_create_irq_sender(FACTORY_PROT, vpage_create_raw3(0, 0, obj));
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assert(msg_tag_get_val(tag) >= 0);
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uirq_bind(obj, TIM2_IRQn, 0);
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int ret = thread_create(IRQ_THREAD_PRIO, TIM2_IRQHandler, (umword_t)(stack0 + STACK_SIZE), NULL);
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assert(ret >= 0);
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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TIM_TimeBaseStructure.TIM_Period = 100 - 1; // 自动重装值（此时改为100ms）
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TIM_TimeBaseStructure.TIM_Prescaler = 720 - 1; // 时钟预分频
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; // 向上计数
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; // 时钟分频1
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TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
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TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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TIM_ClearFlag(TIM2, TIM_FLAG_Update);
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TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
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TIM_Cmd(TIM2, ENABLE);
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}
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static void *TIM2_IRQHandler(void *arg)
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{
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while (1)
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{
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msg_tag_t tag = uirq_wait(obj, 0);
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if (msg_tag_get_val(tag) >= 0)
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{
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if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) // 检查TIM3更新中断发生否
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{
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TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
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}
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uirq_ack(obj, TIM2_IRQn);
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}
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}
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return NULL;
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}
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