#include "includes.h" #include "os/os_api.h" #include "asm/clock.h" #include "asm/irq.h" //#include "jiffies.h" #include "system/timer.h" #include "system/init.h" #include "gpio.h" //#include "asm/power_interface.h" #include "generic/atomic.h" #include "asm/cpu.h" #include "demo_config.h" #ifdef USE_TIMER_TEST2_DEMO //用户只能选择：JL_TIMER2、JL_TIMER3、JL_TIMER4、JL_TIMER5 //PWM使用定时器2或者3映射PWM时候，不能用于定时 static JL_TIMER_TypeDef *TMR = JL_TIMER4;//选择定时器4 static u8 timer_irq = IRQ_TIMER4_IDX;//选择定时器4 //#define JL_TIMER_B JL_TIMER5 //u32 timer_b_cnt; static const u8 timer_index[16] = {0, 4, 1, 5, 2, 6, 3, 7, 8, 12, 9, 13, 10, 14, 11, 15}; static const u32 timer_table[16] = {1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768}; static u32 timer_clk = 0; void timer4_stop(void); void timer4_run(u32 precesion); // timer_b_test(void); void test(void); #define AWINLINE __attribute__((always_inline)) //#define TSEC SEC_USED(.volatile_ram_code) //当中断1ms一下，建议使用函数放在内部ram #define TSEC #define TIMER_CON JL_TIMER4->CON //定时器4的控制寄存器 #define TIMER_CNT JL_TIMER4->CNT //定时器4的计数寄存器 #define TIMER_PRD JL_TIMER4->PRD //定时器4的周期寄存器 //#define TIMER_VETOR IRQ_TIMER4_IDX struct timer_hdl { u32 ticks; int index; int prd; u32 fine_cnt; u8 run; u32 precesion; void *power_ctrl; struct list_head head; }; static struct timer_hdl hdl; #define __this (&hdl) static const u32 timer_div[] = { /*0000*/ 1, /*0001*/ 4, /*0010*/ 16, /*0011*/ 64, /*0100*/ 2, /*0101*/ 8, /*0110*/ 32, /*0111*/ 128, /*1000*/ 256, /*1001*/ 4 * 256, /*1010*/ 16 * 256, /*1011*/ 64 * 256, /*1100*/ 2 * 256, /*1101*/ 8 * 256, /*1110*/ 32 * 256, /*1111*/ 128 * 256, }; #define APP_TIMER_CLK clk_get("osc") //获得时钟源 #define MAX_TIME_CNT 0x7fff //最大计数值 #define MIN_TIME_CNT 0x100 //最小计数值 static AWINLINE TSEC void timer_cfg(u32 freq, u32 us) //定时中断配置 { u32 clock = timer_clk; u8 psc = 0; u8 tmp = 0; u32 prd = 0; u32 ts = us / (1000 * 1000);//计算秒 u32 tu = us % (1000 * 1000);//计算秒剩余us u8 i; float tp = 0; if (freq >= clock) { freq = clock; } else if (freq <= 1) { freq = 1; if (ts) { tp = (float)tu / (1000 * 1000); } } /*求prd值*/ prd = clock / freq; if (prd > 65535) { for (psc = 0; psc < 16; psc++) { prd = (u32)(clock / (timer_table[psc]) / freq); if (prd <= 65535) { break; } else if (psc == 15) { prd = 65535; break; } } } prd = ts ? (prd * ts + tp * prd) : prd; psc = timer_index[psc]; TMR->CON = 0; TMR->CNT = 0; TMR->CON |= BIT(14); TMR->PRD = prd; TMR->CON |= psc << 4; //lsb_clk分频 TMR->CON |= BIT(0); } static void TSEC timer_set(u32 us)//设置时间，该函数可以在中断调用重新设置定时器值 { u32 freq = 1000000 / us; timer_cfg(freq, us); } static void TSEC timer_freq_set(u32 freq)//设置频率，该函数可以在中断调用重新设置定时器值 { timer_cfg(freq, 0); } static ___interrupt TSEC void timer_isr(void)//中断 { if (TMR->CON & BIT(15)) { TMR->CON |= BIT(14); putchar('@'); //todo，中断函数执行程序... } } //example test static int c_main(void) { timer_clk = clk_get("timer");//先获取定时器的时钟源 request_irq(timer_irq, 3, timer_isr, 0);//注册中断函数定和中断优先级 #if 1 timer_set(50 * 1000); //初始化50ms进一次中断 os_time_dly(500); timer4_stop(); //定时器停止 os_time_dly(500); timer4_run(2); //定时器开始 os_time_dly(500); test(); //输入捕获功能测试 #else //timer_freq_set(10000);//设置10K频率进中断 #endif return 0; } static void timer4_suspend(void) //定时器暂停 { if (__this->run) { __this->ticks = JL_TIMER4->CNT; JL_TIMER4->CON = 0; } } static void timer4_resume(void) //定时器继续 { if (__this->run == 0) { return; } u32 prd_cnt; u8 index; //precesion = PRD * index / CLK for (index = 0; index < (sizeof(timer_div) / sizeof(timer_div[0])); index++) { prd_cnt = __this->precesion * (APP_TIMER_CLK / 1000) / timer_div[index]; if (prd_cnt > MIN_TIME_CNT && prd_cnt < MAX_TIME_CNT) { break; } } __this->index = index; __this->prd = prd_cnt; JL_TIMER4->CNT = __this->ticks; JL_TIMER4->PRD = prd_cnt; //2ms JL_TIMER4->CON = (index << 4) | BIT(0) | BIT(3); } void timer4_stop(void) //定时器停止 { printf("--->Stop"); JL_TIMER4->CON = BIT(14); __this->run = 0; __this->precesion = 0; } void timer4_run(u32 precesion) //定时器开始 { precesion = 2;//br23 br25 周期不变化 为减少占用cpu资源，固定收集2ms内的计数值 可去掉 if (__this->precesion == precesion) { return; } printf("-->Run %d", precesion); JL_TIMER4->CON = BIT(14); __this->precesion = precesion; __this->run = 1; __this->ticks = 0; timer4_resume(); } //////输入捕获 static bool isr_flag = false; //设立中断标志位 enum edge_mode { RISE_EDGE = 0, FALL_EDGE, }; bool timer5_interrupt(void) { return isr_flag; } void timer5_start(void) //定时器5开始，清空计数器和标志位 { JL_TIMER5->CNT = 0; isr_flag = false; } ___interrupt static void timer5_isr(void) { JL_TIMER5->CON |= BIT(14); isr_flag = true; } int timer5_get_cnt(void) //10us { u32 a = JL_TIMER5->PRD; u32 b = a * 96 / 100; //53Mhz/512k 再转化为10us return b ; } void timer5_init(int mode) //定时器5初始化 { JL_TIMER5->CNT = 0; #if CPU_CORE_NUM > 1 request_irq(IRQ_TIMER5_IDX, 1, timer5_isr, 1); #else request_irq(IRQ_TIMER5_IDX, 1, timer5_isr, 0); #endif JL_TIMER5->CON = BIT(7) | BIT(6);//lsb_clk的512分频 if (mode == FALL_EDGE) { JL_TIMER5->CON |= BIT(0) | BIT(1);//下降沿捕获 gpio_direction_input(IO_PORTC_08);//输入引脚为PC8 gpio_set_pull_up(IO_PORTC_08, 1); } else { JL_TIMER5->CON |= BIT(1);//上升沿捕获 gpio_direction_input(IO_PORTC_08); gpio_set_pull_down(IO_PORTC_08, 1); } } void timer5_uninit(void) { JL_TIMER5->CON = 0; } void test(void) { extern bool timer5_interrupt(void); extern void timer5_start(void); extern void timer5_init(int mode); //mode： 0 上升沿 1 下降沿 extern void timer5_uninit(void); extern int timer5_get_cnt(void); timer5_init(1); printf("-------%s-------%d\r\n", __func__, __LINE__); while (1) { timer5_start(); //先清空下数据 printf("-------%s-------%d\r\n", __func__, __LINE__); while (!timer5_interrupt()) { //检测到有下降沿则为true,采用轮询方式每200ms检测一次 os_time_dly(20); } printf("-------%s-------%d get cnt = %d\r\n", __func__, __LINE__, timer5_get_cnt()); //返回出来的是单位是10us 的cnt 就是 cnt* 100 000就是秒 /* timer5_get_cnt(); */ } timer5_uninit(); //用完就释放 } late_initcall(c_main); #endif