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