- android - 多次调用 OnPrimaryClipChangedListener
- android - 无法更新 RecyclerView 中的 TextView 字段
- android.database.CursorIndexOutOfBoundsException : Index 0 requested, 光标大小为 0
- android - 使用 AppCompat 时,我们是否需要明确指定其 UI 组件(Spinner、EditText)颜色
我在为我的状态机使用 case 语句数组时遇到问题。大多数网站都提到数组不能用于 case 语句,所以我一直在尝试解决它,但到目前为止还没有成功。我真的很感激任何帮助或建议。 澄清:我不想对状态进行硬编码,我试图以这样的方式制作程序,即如果用户仅更改 fsm_state_array[] 中的顺序,程序将以该方式执行仅排序而不更改 void loop() 中的任何其他内容。
这是我到目前为止尝试过的方法,当用户在数组中输入他们的状态序列时,我使用硬编码函数来检查先前状态、当前状态和下一个状态,所以在我下面的代码中状态应该去从 0 --> 2 --> 3--> 1,但是,我得到 0 --> 2 --> 1 --> 3。我知道如果我只在案例中使用数组,这个问题可以很容易地解决声明,但编译器给我一个错误。我非常感谢对此的任何帮助或建议。
我的代码如下所示:
//Objectives: Use input from laser to control pre-amp on adc. Multiplex the inputs on Pre-Amp
//Type: Pulse, Freq:20Hz (50ms), Amp:5.0 Vpp, Offset:500mV, Width = 100ns
//-----------------------PROJECT LIBRARIES----------------------------------
#include <Bounce2.h>
#include <Arduino.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
//-----------------------DEFINES------------------------------------------
//Declare Laser Input Pin
#define LASER_PIN 2
//Declare Reset Pin
#define RESET_PIN 3
typedef enum {
STATE_0,
STATE_1,
STATE_2,
STATE_3
} fsm_state;
//User can change or remove states here
fsm_state fsm_state_Array[] = {STATE_0, STATE_2, STATE_3, STATE_1};
//*eNextstate controls on which state the program starts the state machine, default is STATE_00, Must be same value as Transition_State[0]
fsm_state eNextState = fsm_state_Array[0];
int Current_State = 0;
int Next_State = 0;
int Previous_State = 0;
// -------------------------CONSTANTS (won't change)-------------------------------------
const unsigned long period = 1000; //the value is a number of milliseconds
//-------------------------VARIABLES (will change)-------------------------------------
bool only_for_print = false;//used only for print state ments
int reset_switch = 1;//Start HIGH to avoid reset
int PulseCount = 0; //Pulse count from X-RAY
int Output = 0;//Switch state on the Pre-Amp
int wait = 0;//wait for pulses count
int N = 20;//no. of pulses to count before switching states
volatile int IRQcount = 0;
volatile boolean reset_flag = false;
unsigned long start_time = 0;
unsigned long current_time = 0;
//----------------------------USER DEFINED FUNCTIONS---------------------------------
void fsm();
void loop();
void setup();
void WDT_RESET();
void IRQcounter();
void CountPulses();
//-----------------------------DEBOUNCE FUNCTIONS---------------------------------------
//--------------------------------MAIN SETUP--------------------------------------
void setup()
{
Serial.begin(115200);
//Pin Setup
pinMode(LASER_PIN, INPUT_PULLUP);
pinMode(RESET_PIN, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(LASER_PIN), IRQcounter, RISING);//attach interrupt handler to laser input
attachInterrupt (digitalPinToInterrupt (RESET_PIN), RESET_ISR, FALLING); // attach interrupt handler to reset, wait for user press button or switch
start_time = millis(); //initial start time
sei();//Turn on Interrupts
WaitForPulses();//Waits to detect 20 pulses
}
//--------------------------------MAIN LOOP----------------------------------
void loop()
{
current_time = millis();
fsm();//State machine
}
//--------------------------------PULSE COUNT FUNCTION--------------------------------------------
void CountPulses()
{
// current_time = millis();
if ((current_time - start_time) >= period)
{
start_time = current_time;
cli();//disable interrupts
PulseCount = IRQcount;
IRQcount = 0;
Serial.print(F("Pulse Count is = "));
Serial.println(PulseCount);
sei();//enable interrupts
}
}
//--------------------------------STATE MACHINE FUNCTION--------------------------------------------
void fsm()
{
switch (eNextState)
{
case STATE_0:
/////////Print Statement only for debugging//////////
while (only_for_print == false)
{
Serial.println("The state is 0");
only_for_print = true;
}
///////// Count Pulses Setup /////////////////
Previous_State = fsm_state_Array[3];
Current_State= 0;
Next_State = fsm_state_Array[1];
current_time = millis();
CountPulses();
Output = 0;
if (PulseCount == N)
{
PulseCount = 0;//Reset Pulse Count
only_for_print = false; //used only for print statments
State_Check_0_to_1();//Move to next state
}
break;
case STATE_1:
/////////Print Statement only for debugging//////////
while (only_for_print == false)
{
Serial.println("The state is 1");
only_for_print = true;
}
///////// Count Pulses Setup /////////////////
Previous_State = fsm_state_Array[0];
Current_State= 1;
Next_State = fsm_state_Array[2];
current_time = millis();
CountPulses();
Output = 1;
if (PulseCount == N)
{
PulseCount = 0;//Reset Pulse Count
only_for_print = false; //used only for print statments
State_Check_1_to_2();//Move to next state
}
break;
case STATE_2:
/////////Print Statement only for debugging//////////
while (only_for_print == false)
{
Serial.println("The state is 2");
only_for_print = true;
}
///////// Count Pulses Setup /////////////////
Previous_State = fsm_state_Array[1];
Current_State= 2;
Next_State = fsm_state_Array[3];
current_time = millis();
CountPulses();
Output = 2;
if (PulseCount == N)
{
PulseCount = 0;//Reset Pulse Count
only_for_print = false; //used only for print statments
State_Check_2_to_3();//Move to next state
}
break;
case STATE_3:
/////////Print Statement only for debugging//////////
while (only_for_print == false)
{
Serial.println("The state is 3");
only_for_print = true;
}
///////// Count Pulses Setup /////////////////
Previous_State = fsm_state_Array[2];
Current_State= 3;
Next_State = fsm_state_Array[0];
current_time = millis();
CountPulses();
Output = 3;
if (PulseCount == N)
{
PulseCount = 0;//Reset Pulse Count
only_for_print = false; //used only for print statments
State_Check_3_to_0();//Move to next state
}
break;
}
}
//----------------------------------RESET SWITCH ISR-------------------------------------
void RESET_ISR()
{
reset_flag = true;
if (reset_flag == true)
{
// Serial.println("System will now Reset");// Only for debugging
reset_flag = false;//Reset reset switch flag
wdt_enable(WDTO_500MS);//Reset after 0.5 seconds
while (1)
{
// wdt_reset(); // uncomment to avoid reboot
}
}
}
//-----------------------PULSE COUNT ISR---------------------------------------
void IRQcounter()
{
IRQcount++;
}
//-----------------------WAIT FOR PULSES---------------------------------------
void WaitForPulses()
{
while (wait < 20)
{
if (bit_is_set(EIFR, INTF0))
{
Serial.println("Pulse is detected ");
wait++;
}
}
wait = 0;//reset
}
void State_Check_0_to_1()//Check values of state 0 before going to state 1
{
if(Previous_State == fsm_state_Array[3] && Current_State == 0 && Next_State == fsm_state_Array[1])
{
eNextState = Next_State;
}
}
void State_Check_1_to_2()//Check values of state 1 before going to state 2
{
if((Previous_State == fsm_state_Array[0]) && (Current_State == 1) && (Next_State == fsm_state_Array[2]))
{
eNextState = Next_State;
}
}
void State_Check_2_to_3()//Check values of state 2 before going to state 3
{
if((Previous_State == fsm_state_Array[1]) && (Current_State == 2) && (Next_State == fsm_state_Array[3]))
{
eNextState = Next_State;
}
}
void State_Check_3_to_0()//Check values of state 3 before going to state 0
{
if((Previous_State == fsm_state_Array[2]) && (Current_State == 3) && (Next_State == fsm_state_Array[0]))
{
eNextState = Next_State;
}
}
这是我的串行监视器显示的内容:
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
Pulse is detected
The state is 0 -----> State 0
Pulse Count is = 72
Pulse Count is = 19
Pulse Count is = 20
The state is 2 -----> State 2
Pulse Count is = 20
The state is 1 -----> State 1
Pulse Count is = 21
Pulse Count is = 19
Pulse Count is = 21
Pulse Count is = 19
Pulse Count is = 21
Pulse Count is = 19
Pulse Count is = 21
Pulse Count is = 19
Pulse Count is = 21
Pulse Count is = 20
The state is 3 -----> State 3
Pulse Count is = 20
The state is 0
Pulse Count is = 20
The state is 2
Pulse Count is = 20
The state is 1
Pulse Count is = 20
The state is 3
按照评论中的建议,使用指针测试 FSM 的单独代码:
typedef void (*current_state)();
void state0();
void state1();
void state2();
void state3();
current_state states[4]={&state0,&state2,&state3,&state1};
current_state next_state;
void setup()
{
Serial.begin(115200);
}
void loop()
{
current_state();
}
void state0()
{
next_state = states[1]; // No parenthesis!
Serial.println("I am in STATE 0");
}
void state1()
{
next_state = states[2]; // No parenthesis!
Serial.println("I am in STATE 1");
}
void state2()
{
next_state = states[3]; // No parenthesis!
Serial.println("I am in STATE 2");
}
void state3()
{
next_state = states[0]; // No parenthesis!
Serial.println("I am in STATE 3");
}
最佳答案
此代码来自 STATE_2
的处理
Next_State = fsm_state_Array[3];
将 Next_State
设置为 STATE_1
因为数组初始化为
fsm_state fsm_state_Array[] = {STATE_0, STATE_2, STATE_3, STATE_1};
这意味着...
fsm_state_Array[0] = STATE_0;
fsm_state_Array[1] = STATE_2;
fsm_state_Array[2] = STATE_3;
fsm_state_Array[3] = STATE_1; // This is the element used
为了提供一个更“动态”的解决方案,可能对状态使用函数指针比使用开关效果更好:
// Current state is just a apointer to a void function
// accepting no parameters
void (*current_state)();
// All states are just void functions accepting no parameters
void state1();
void state2();
...
// To set what is the next state you update current_state
void state1() {
...
current_state = state2; // No parenthesis!
}
// In the main handler you just call current_state
...
current_state(); // Do the state processing
如果你想执行一系列操作然后使用函数指针你可以只保留一个数组并迭代它:
void (*states[])() = {
state1,
state2,
state3,
...
NULL /// To mark the end of the sequence
};
然后你可以按顺序执行这些步骤
void main() {
for(int i=0; states[i]; i++) {
states[i](); // Execute the step
}
}
关于c++ - Case 语句中的数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58720331/
我想做的是让 JTextPane 在 JPanel 中占用尽可能多的空间。对于我使用的 UpdateInfoPanel: public class UpdateInfoPanel extends JP
我在 JPanel 中有一个 JTextArea,我想将其与 JScrollPane 一起使用。我正在使用 GridBagLayout。当我运行它时,框架似乎为 JScrollPane 腾出了空间,但
我想在 xcode 中实现以下功能。 我有一个 View Controller 。在这个 UIViewController 中,我有一个 UITabBar。它们下面是一个 UIView。将 UITab
有谁知道Firebird 2.5有没有类似于SQL中“STUFF”函数的功能? 我有一个包含父用户记录的表,另一个表包含与父相关的子用户记录。我希望能够提取用户拥有的“ROLES”的逗号分隔字符串,而
我想使用 JSON 作为 mirth channel 的输入和输出,例如详细信息保存在数据库中或创建 HL7 消息。 简而言之,输入为 JSON 解析它并输出为任何格式。 最佳答案 var objec
通常我会使用 R 并执行 merge.by,但这个文件似乎太大了,部门中的任何一台计算机都无法处理它! (任何从事遗传学工作的人的附加信息)本质上,插补似乎删除了 snp ID 的 rs 数字,我只剩
我有一个以前可能被问过的问题,但我很难找到正确的描述。我希望有人能帮助我。 在下面的代码中,我设置了varprice,我想添加javascript变量accu_id以通过rails在我的数据库中查找记
我有一个简单的 SVG 文件,在 Firefox 中可以正常查看 - 它的一些包装文本使用 foreignObject 包含一些 HTML - 文本包装在 div 中:
所以我正在为学校编写一个 Ruby 程序,如果某个值是 1 或 3,则将 bool 值更改为 true,如果是 0 或 2,则更改为 false。由于我有 Java 背景,所以我认为这段代码应该有效:
我做了什么: 我在这些账户之间创建了 VPC 对等连接 互联网网关也连接到每个 VPC 还配置了路由表(以允许来自双方的流量) 情况1: 当这两个 VPC 在同一个账户中时,我成功测试了从另一个 La
我有一个名为 contacts 的表: user_id contact_id 10294 10295 10294 10293 10293 10294 102
我正在使用 Magento 中的新模板。为避免重复代码,我想为每个产品预览使用相同的子模板。 特别是我做了这样一个展示: $products = Mage::getModel('catalog/pro
“for”是否总是检查协议(protocol)中定义的每个函数中第一个参数的类型? 编辑(改写): 当协议(protocol)方法只有一个参数时,根据该单个参数的类型(直接或任意)找到实现。当协议(p
我想从我的 PHP 代码中调用 JavaScript 函数。我通过使用以下方法实现了这一点: echo ' drawChart($id); '; 这工作正常,但我想从我的 PHP 代码中获取数据,我使
这个问题已经有答案了: Event binding on dynamically created elements? (23 个回答) 已关闭 5 年前。 我有一个动态表单,我想在其中附加一些其他 h
我正在尝试找到一种解决方案,以在 componentDidMount 中的映射项上使用 setState。 我正在使用 GraphQL连同 Gatsby返回许多 data 项目,但要求在特定的 pat
我在 ScrollView 中有一个 View 。只要用户按住该 View ,我想每 80 毫秒调用一次方法。这是我已经实现的: final Runnable vibrate = new Runnab
我用 jni 开发了一个 android 应用程序。我在 GetStringUTFChars 的 dvmDecodeIndirectRef 中得到了一个 dvmabort。我只中止了一次。 为什么会这
当我到达我的 Activity 时,我调用 FragmentPagerAdapter 来处理我的不同选项卡。在我的一个选项卡中,我想显示一个 RecyclerView,但他从未出现过,有了断点,我看到
当我按下 Activity 中的按钮时,会弹出一个 DialogFragment。在对话框 fragment 中,有一个看起来像普通 ListView 的 RecyclerView。 我想要的行为是当
我是一名优秀的程序员,十分优秀!