esp32s3的mcpwm的疑问,线程安全吗?怎么

[QbasicJacky]

1.官方驱动函数 里面调用了 heap_caps_calloc 创建各种结构体,heap_caps_calloc 函数线程安全吗?
2.mcpwm 有没有中断 例程,当pwm update 的中断 cmp 的中断

Code: [Select all] [Expand/Collapse]

1. void pwm_init(void)
2. {
3.     // mcpwm timer
4.     //定义变量 timer
5.     mcpwm_timer_handle_t timer;
6.     //定义操作指针 后面的 gen 和 cmp 都是绑定到操作指针上面
7.     mcpwm_oper_handle_t opt;
8.     //定义比较器指针
9.     mcpwm_cmpr_handle_t cmpa;
10.     mcpwm_cmpr_handle_t cmpb;
11.     //定义generator 指针
12.     mcpwm_gen_handle_t  gena;
13.     mcpwm_gen_handle_t  genb;
14.  
15.     //配置定时器计算基数和周期
16.     mcpwm_timer_config_t timer_config = {
17.         .group_id = 0,
18.         .clk_src = MCPWM_TIMER_CLK_SRC_DEFAULT,
19.         .resolution_hz = 1000000,
20.         .period_ticks = 100,
21.         .count_mode = MCPWM_TIMER_COUNT_MODE_UP,
22.     };
23.     //配置操作指针绑定的分组,编写和timer的分组一致
24.     mcpwm_operator_config_t operator_config = {
25.         .group_id = 0,
26.     };
27.     //定义比较器配置,在0点更新
28.     mcpwm_comparator_config_t comparator_config = {
29.         .flags.update_cmp_on_tez = true,
30.     };
31.  
32.     //配置生成器绑定的引脚
33.     mcpwm_generator_config_t generator_config = {};
34.  
35.     //根据配置 初始化定时器
36.     mcpwm_new_timer(&timer_config, &timer);
37.     //根据配置 初始化 操作指针
38.     mcpwm_new_operator(&operator_config, &opt);
39.     //绑定操作指针和定时器
40.     mcpwm_operator_connect_timer(opt,timer);
41.  
42.     //when the cmp value to update,绑定比较指针到操作器,并且指明 0时 更新
43.     mcpwm_new_comparator(opt, &comparator_config, &cmpa);       //set the first cmp
44.     mcpwm_new_comparator(opt, &comparator_config, &cmpb);       //set the second cmp
45.  
46.     //set the pwm pin 设定pwm的io
47.     generator_config.gen_gpio_num=1;
48.     mcpwm_new_generator(opt, &generator_config, &gena);
49.     generator_config.gen_gpio_num=2;
50.     mcpwm_new_generator(opt, &generator_config, &genb);
51.  
52.     //set the event when empty or compare , 设定pwm定时器归零时候电平,比较后电平
53.     mcpwm_generator_set_actions_on_timer_event(gena,
54.             MCPWM_GEN_TIMER_EVENT_ACTION(MCPWM_TIMER_DIRECTION_UP, MCPWM_TIMER_EVENT_EMPTY, MCPWM_GEN_ACTION_HIGH),
55.             MCPWM_GEN_TIMER_EVENT_ACTION_END());
56.     mcpwm_generator_set_actions_on_compare_event(gena,
57.             MCPWM_GEN_COMPARE_EVENT_ACTION(MCPWM_TIMER_DIRECTION_UP, cmpa, MCPWM_GEN_ACTION_LOW),
58.             MCPWM_GEN_COMPARE_EVENT_ACTION_END());
59.     mcpwm_generator_set_actions_on_timer_event(genb,
60.             MCPWM_GEN_TIMER_EVENT_ACTION(MCPWM_TIMER_DIRECTION_UP, MCPWM_TIMER_EVENT_EMPTY, MCPWM_GEN_ACTION_LOW),
61.             MCPWM_GEN_TIMER_EVENT_ACTION_END());
62.     mcpwm_generator_set_actions_on_compare_event(genb,
63.             MCPWM_GEN_COMPARE_EVENT_ACTION(MCPWM_TIMER_DIRECTION_UP, cmpb, MCPWM_GEN_ACTION_HIGH),
64.             MCPWM_GEN_COMPARE_EVENT_ACTION_END());
65.     //使能定时器
66.     mcpwm_timer_enable(timer);
67.     //启动定时器
68.     mcpwm_timer_start_stop(timer, MCPWM_TIMER_START_NO_STOP);
69.  
70.     //设定pwm 数值
71.     mcpwm_comparator_set_compare_value(cmpa,50);
72.     mcpwm_comparator_set_compare_value(cmpb,20);
73. }

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[xien551]

我用过esp32的idf5.1mcpwm，和wifi，mqtt一起用的。

程序不会崩。但是我从示波器能看到mcpwm产生的spwm的正弦波形会在其它线程工作时轻微畸变。如果我删除wifi和mqtt的功能模块，波形一直完整。

所以我猜测新版本的mcpwm线程应该是安全的，但是实时性可能会受影响。