在100ask stm32mp157板子上運行超級瑪麗

一、下載arm-NES-linux

git clone https://gitee.com/ant1423/arm-NES-linux.git

二、修改源碼支持標準輸入控制

這一步主要修改源碼根目錄下的linux/joypad_input.cpp文件，要生成linux可用的程序，只需要在linux目錄下面執行make命令即可，但是由于編譯的是cpp文件，所以需要交叉編譯工具鏈支持c++，文末直接給出代碼

添加了一個新的函數以支持從標準輸入獲取輸入事件，這里的映射關系是參考的上面手柄來設置的

設置一個T_JoypadInput結構體

最后在InitJoypadInput函數里注冊就行了

三、 編譯運行

編譯只需要在arm-NES-linux/linux目錄下執行make命令就行了，編譯生成InfoNes文件，把它和游戲ROM拷貝到板子上，添加執行權限就可以運行
注意，如果myir的QT程序正在運行，需要關閉myir的QT程序

systemctp stop myir

關閉成功后即可執行InfoNes，如運行超級瑪麗

./InfoNES Super_Mario.nes

效果如下圖所示

按在串口輸入H開始游戲，J是跳躍，K是攻擊，AD是移動

四、問題

1、顏色顯示的不正確，這里可能需要修改RGB格式
1、在按下按鍵的時候，延時設置的是500毫秒，在按鍵按下之后也沒有上報松開事件，整體的體驗不是很好
2、在通過第一關的時候，內核會報錯，這里沒有仔細調。無法進入下一關，并且無法重新啟動游戲

joypad_input.cpp

#include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include <pthread.h> #include <sys/ioctl.h> #include <termios.h> #include<sys/select.h> #include <sys/time.h> #include <errno.h> #include <string.h>#define JOYPAD_DEV "/dev/joypad" #define USB_JS_DEV "/dev/input/js0"typedef struct JoypadInput{int (*DevInit)(void);int (*DevExit)(void);int (*GetJoypad)(void);struct JoypadInput *ptNext;pthread_t tTreadID; /* 子線程ID */ }T_JoypadInput, *PT_JoypadInput;struct js_event { unsigned int time; /* event timestamp in milliseconds */ unsigned short value; /* value */ unsigned char type; /* event type */ unsigned char number; /* axis/button number */ };//全局變量通過互斥體訪問 static unsigned char g_InputEvent;static pthread_mutex_t g_tMutex = PTHREAD_MUTEX_INITIALIZER; static pthread_cond_t g_tConVar = PTHREAD_COND_INITIALIZER;static int joypad_fd; static int USBjoypad_fd;static PT_JoypadInput g_ptJoypadInputHead;struct termios g_tStoredSettings; struct termios g_tNewSettings;static void *InputEventTreadFunction(void *pVoid) {/* 定義函數指針 */int (*GetJoypad)(void);GetJoypad = (int (*)(void))pVoid;while (1){//因為有阻塞所以沒有輸入時是休眠g_InputEvent = GetJoypad();//有數據時喚醒pthread_mutex_lock(&g_tMutex);/* 喚醒主線程 */pthread_cond_signal(&g_tConVar);pthread_mutex_unlock(&g_tMutex);} }static int RegisterJoypadInput(PT_JoypadInput ptJoypadInput) {PT_JoypadInput tmp;if(ptJoypadInput->DevInit()){return -1;}//初始化成功創建子線程 將子項的GetInputEvent 傳進來pthread_create(&ptJoypadInput->tTreadID, NULL, InputEventTreadFunction, (void*)ptJoypadInput->GetJoypad);if(! g_ptJoypadInputHead){g_ptJoypadInputHead = ptJoypadInput;}else{tmp = g_ptJoypadInputHead;while(tmp->ptNext){tmp = tmp->ptNext;}tmp->ptNext = ptJoypadInput;}ptJoypadInput->ptNext = NULL;return 0; }static int joypadGet(void) {return read(joypad_fd, 0, 0); }static int joypadDevInit(void) {joypad_fd = open(JOYPAD_DEV, O_RDONLY);if(-1 == joypad_fd){printf("%s dev not found \r\n", JOYPAD_DEV);return -1;}return 0; }static int joypadDevExit(void) {close(joypad_fd);return 0; }static T_JoypadInput joypadInput = {joypadDevInit,joypadDevExit,joypadGet, };static int USBjoypadGet(void) {/*** FC手柄 bit 鍵位對應關系 真實手柄中有一個定時器，處理 連A 連B * 0 1 2 3 4 5 6 7* A B Select Start Up Down Left Right*///因為 USB 手柄每次只能讀到一位鍵值 所以要有靜態變量保存上一次的值static unsigned char joypad = 0;struct js_event e;if(0 < read (USBjoypad_fd, &e, sizeof(e))){if(0x2 == e.type){/*上：value:0x8001 type:0x2 number:0x5value:0x0 type:0x2 number:0x5*/if(0x8001 == e.value && 0x5 == e.number){joypad |= 1<<4;}/*下：value:0x7fff type:0x2 number:0x5value:0x0 type:0x2 number:0x5*/if(0x7fff == e.value && 0x5 == e.number){joypad |= 1<<5;}//松開if(0x0 == e.value && 0x5 == e.number){joypad &= ~(1<<4 | 1<<5);}/*左：value:0x8001 type:0x2 number:0x4value:0x0 type:0x2 number:0x4*/if(0x8001 == e.value && 0x4 == e.number){joypad |= 1<<6;}/*右：value:0x7fff type:0x2 number:0x4value:0x0 type:0x2 number:0x4*/if(0x7fff == e.value && 0x4 == e.number){joypad |= 1<<7;}//松開if(0x0 == e.value && 0x4 == e.number){joypad &= ~(1<<6 | 1<<7);}}if(0x1 == e.type){/*選擇：value:0x1 type:0x1 number:0xavalue:0x0 type:0x1 number:0xa*/if(0x1 == e.value && 0xa == e.number){joypad |= 1<<2;}if(0x0 == e.value && 0xa == e.number){joypad &= ~(1<<2);}/*開始：value:0x1 type:0x1 number:0xbvalue:0x0 type:0x1 number:0xb*/if(0x1 == e.value && 0xb == e.number){joypad |= 1<<3;}if(0x0 == e.value && 0xb == e.number){joypad &= ~(1<<3);}/*Avalue:0x1 type:0x1 number:0x0value:0x0 type:0x1 number:0x0*/if(0x1 == e.value && 0x0 == e.number){joypad |= 1<<0;}if(0x0 == e.value && 0x0 == e.number){joypad &= ~(1<<0);}/*Bvalue:0x1 type:0x1 number:0x1value:0x0 type:0x1 number:0x1*/if(0x1 == e.value && 0x1 == e.number){joypad |= 1<<1;}if(0x0 == e.value && 0x1 == e.number){joypad &= ~(1<<1);}/*Xvalue:0x1 type:0x1 number:0x3value:0x0 type:0x1 number:0x3*/if(0x1 == e.value && 0x3 == e.number){joypad |= 1<<0;}if(0x0 == e.value && 0x3 == e.number){joypad &= ~(1<<0);}/*Yvalue:0x1 type:0x1 number:0x4value:0x0 type:0x1 number:0x4*/if(0x1 == e.value && 0x4 == e.number){joypad |= 1<<1;}if(0x0 == e.value && 0x4 == e.number){joypad &= ~(1<<1);}}return joypad;}return -1; }static int USBjoypadDevInit(void) {USBjoypad_fd = open(USB_JS_DEV, O_RDONLY);if(-1 == USBjoypad_fd){printf("%s dev not found \r\n", USB_JS_DEV);return -1;}return 0; }static int USBjoypadDevExit(void) {close(USBjoypad_fd);return 0; }static T_JoypadInput usbJoypadInput = {USBjoypadDevInit,USBjoypadDevExit,USBjoypadGet, };/* 從標準輸入獲取輸入 */ static int CmdJoypadGet(void) {/*** FC手柄 bit 鍵位對應關系 真實手柄中有一個定時器，處理 連A 連B * 0 1 2 3 4 5 6 7* A B Select Start Up Down Left Right*///因為 USB 手柄每次只能讀到一位鍵值 所以要有靜態變量保存上一次的值/* A --> LeftS --> DownW --> UpD --> RightG --> SelectH --> StartJ --> AK --> B*/unsigned char joypad = 0;static unsigned char LastJoypad = 0;char c = 0;static char LastC = 0;int ret = 0;fd_set read_fds;FD_ZERO(&read_fds);FD_SET(STDIN_FILENO, &read_fds);struct timeval tTimeOut;tTimeOut.tv_usec = 500000; //500msret = select(1, &read_fds, NULL, NULL, &tTimeOut);if(ret <= 0){printf("select timeout or error, ret = %d, errno:%d -> %s\r\n", ret, errno, strerror(errno));return 0;}if(FD_ISSET(0, &read_fds)){read(0, &c, 1);}else{printf("error ! invaild fd\n");return 0;}printf("Get Input From Cmd: %c\r\n", c);switch (c){case 'A':case 'a':/* Left */joypad |= 1<<6;break;case 'S':case 's':/* Down */joypad |= 1<<5;break;case 'D':case 'd':/* Right */joypad |= 1<<7;break;case 'W':case 'w':/* Up */joypad |= 1<<4;break;case 'J':case 'j':/* A */joypad |= 1<<0;break;case 'K':case 'k':/* B */joypad |= 1<<1;case 'G':case 'g':/* Select */joypad |= 1<<2;break;case 'H':case 'h':/* Start */joypad |= 1<<3;break; default:break;}printf("Get Input Data Return %u\r\n", joypad);LastJoypad = joypad;LastC = c;return joypad; }static int CmdJoypadDevInit(void) {tcgetattr (0, &g_tStoredSettings);g_tNewSettings = g_tStoredSettings;g_tNewSettings.c_lflag &= (~ICANON);g_tNewSettings.c_cc[VTIME] = 0;g_tNewSettings.c_cc[VMIN] = 1;tcsetattr (0, TCSANOW, &g_tNewSettings);return 0; }static int CmdJoypadDevExit(void) {tcsetattr (0, TCSANOW, &g_tStoredSettings); // 恢復終端參數return 0; }static T_JoypadInput CmdJoypadInput = {CmdJoypadDevInit,CmdJoypadDevExit,CmdJoypadGet, };int InitJoypadInput(void) {int iErr = 0; // iErr = RegisterJoypadInput(&joypadInput); // iErr = RegisterJoypadInput(&usbJoypadInput);iErr = RegisterJoypadInput(&CmdJoypadInput);return iErr; }int GetJoypadInput(void) {printf("get input sleep...\r\n");/* 休眠 */pthread_mutex_lock(&g_tMutex);pthread_cond_wait(&g_tConVar, &g_tMutex); printf("wake up get data...\r\n");/* 被喚醒后,返回數據 */pthread_mutex_unlock(&g_tMutex);return g_InputEvent; }

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