移植移植infoNES模拟器到嵌入式linux上，并增加支持声音输出和按键
代码放在了github上。
/yongzhena/infoNES
先来个效果截图：
按键驱动源码：
#include <linux/module.h>#include <linux/kernel.h>#include <linux/fs.h>#include <linux/init.h>#include <linux/delay.h>#include <asm/uaccess.h>#include <asm/irq.h>#include <asm/io.h>#include <linux/device.h>#include <../arch/arm/mach-mx28/mx28_pins.h>#include "gpio.h"static struct class *joypad_drv_class;/*** FC手柄 bit 键位对应关系 真实手柄中有一个定时器，处理 连A 连B * 0 1 2 3 4 567* A B Select Start Up Down Left Right*/static ssize_t joypad_drv_read(struct file *file, char __user *buf, size_t size, loff_t *ppos){//利用 sszie_t 返回 手柄键值 //buf 是有符号无法保存 8 bitint i;ssize_t val = 0;if(!gpio_get_value(MXS_PIN_TO_GPIO(PINID_SSP0_DATA6))){//printk(KERN_INFO "key1 pressed!\n");val = 1<<0; //A}else{//printk(KERN_INFO "no key pressed!\n");}if(!gpio_get_value(MXS_PIN_TO_GPIO(PINID_SSP0_DATA5))){//printk(KERN_INFO "key2 pressed!\n");val = 1<<6;//LEFT}if(!gpio_get_value(MXS_PIN_TO_GPIO(PINID_SSP0_DATA4))){//printk(KERN_INFO "key3 pressed!\n");val = 1<<3;//start}if(!gpio_get_value(MXS_PIN_TO_GPIO(PINID_LCD_D18))){//printk(KERN_INFO "key4 pressed!\n");val = 1<<7;//RIGHT}if(!gpio_get_value(MXS_PIN_TO_GPIO(PINID_LCD_D17))){//printk(KERN_INFO "key5 pressed!\n");val = 1<<5;//UP}return val;}static struct file_operations joypad_drv_fops = {.owner = THIS_MODULE,.read = joypad_drv_read,};int major;//注册驱动程序int joypad_drv_init(void){printk(KERN_INFO "joypad_drv_init\n");major = register_chrdev(0, "joypad_drv", &joypad_drv_fops);//自动创建 dev 节点joypad_drv_class = class_create(THIS_MODULE, "joypad_drv");device_create(joypad_drv_class, NULL, MKDEV(major, 0), NULL, "joypad");//P3.26 PINID_SAIF1_SDATA0配置为输入gpio_direction_input(MXS_PIN_TO_GPIO(PINID_SAIF1_SDATA0));gpio_direction_input(MXS_PIN_TO_GPIO(PINID_LCD_D17));gpio_direction_input(MXS_PIN_TO_GPIO(PINID_LCD_D18));gpio_direction_input(MXS_PIN_TO_GPIO(PINID_SSP0_DATA4));gpio_direction_input(MXS_PIN_TO_GPIO(PINID_SSP0_DATA5));gpio_direction_input(MXS_PIN_TO_GPIO(PINID_SSP0_DATA6));return 0;}//卸载驱动程序void joypad_drv_exit(void){printk(KERN_INFO "joypad_drv_exit\n");unregister_chrdev(major, "joypad_drv");device_destroy(joypad_drv_class, MKDEV(major, 0));class_destroy(joypad_drv_class);}module_init(joypad_drv_init);module_exit(joypad_drv_exit);MODULE_LICENSE("GPL");
编译驱动为joypad.ko的makefile:
KERN_DIR = /mnt/hgfs/b503/imax283/linux-2.6.35.3all:make -C $(KERN_DIR) M=`pwd` modules clean:make -C $(KERN_DIR) M=`pwd` modules cleanrm -rf modules.orderobj-m+= joypad.o
加载驱动的方法：
insmod joypad.ko
卸载驱动方法：
rmmod joypad.ko
移植InfoNES到imx6ull(一) | 码农家园
单片机---HLK-W801移植Nes模拟器（一）_胖哥王老师的博客-CSDN博客_nes模拟器源码
