-以下为示例代码
可以通过开发板上的按钮来对JQ8900进行操作,达到切换曲目的效果
并且可以自定义修改代码进行更多操作,优化了串口发送信息的方式。
/* 通过RTT例子修改 用于测试YSV0.7是否可用 */ #include <rtthread.h> #include <rtdevice.h> #include <board.h> #define LED0_PIN GET_PIN(B, 1) //定位到野火开发板上两个RGB相关的寄存器上 #define LED0_PINE GET_PIN(B, 0) #ifndef KEY0_PIN_NUM #define KEY0_PIN_NUM GET_PIN(A, 0) /* PA0 */ #endif #ifndef KEY1_PIN_NUM #define KEY1_PIN_NUM GET_PIN(C, 13) /* PC13 */ #endif #define SAMPLE_UART_NAME "uart2" static rt_device_t serial; /* 串口设备句柄 */ struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT; /* 配置参数 */ /* 用于接收消息的信号量 */ static struct rt_semaphore rx_sem; static rt_device_t serial; /* 接收数据回调函数 */ static rt_err_t uart_input(rt_device_t dev, rt_size_t size) { /* 串口接收到数据后产生中断,调用此回调函数,然后发送接收信号量 */ rt_sem_release(&rx_sem); return RT_EOK; } static void Re_music(void *args) { static char buffer1[4]={0xAA,0x05,0x00,0xAF}; rt_uint32_t tx_length; tx_length=4; int i = 0; while(i < 4){ rt_device_write(serial,0,&buffer1[i],tx_length); i++;} rt_kprintf("上一条\n"); } static void next_music(void *args) { static char buffer1[4]={0xAA,0x06,0x00,0xB0}; rt_uint32_t tx_length; tx_length=4; int i = 0; while(i < 4){ rt_device_write(serial,0,&buffer1[i],tx_length); i++;} rt_kprintf("下一条\n"); } static void serial_thread_entry(void *parameter) { // char ch; int jun = 1; while (1) { /*发送缓冲区是固定为5个字节长度的*/ static char uart2_tx_buffer[5]={0xAA,0x02,0x00,0xAC,0x05}; rt_uint32_t tx_length; tx_length=5; rt_pin_mode(KEY0_PIN_NUM, PIN_MODE_INPUT_PULLUP); rt_pin_attach_irq(KEY0_PIN_NUM, PIN_IRQ_MODE_FALLING, Re_music, RT_NULL); rt_pin_irq_enable(KEY0_PIN_NUM, PIN_IRQ_ENABLE); rt_pin_mode(KEY1_PIN_NUM, PIN_MODE_INPUT_PULLUP); rt_pin_attach_irq(KEY1_PIN_NUM, PIN_IRQ_MODE_FALLING, next_music, RT_NULL); rt_pin_irq_enable(KEY1_PIN_NUM, PIN_IRQ_ENABLE); if(jun){ rt_device_write(serial,0,&uart2_tx_buffer[0],tx_length); rt_device_write(serial,0,&uart2_tx_buffer[1],tx_length); rt_device_write(serial,0,&uart2_tx_buffer[2],tx_length); rt_device_write(serial,0,&uart2_tx_buffer[3],tx_length); rt_kprintf("测试成功!");} /* 从串口读取一个字节的数据,没有读取到则等待接收信号量 */ jun = 0; } } static int mdr1(int argc, char *argv[]) { rt_err_t ret = RT_EOK; char uart_name[RT_NAME_MAX]; if (argc == 2) { rt_strncpy(uart_name, argv[1], RT_NAME_MAX); } else { rt_strncpy(uart_name, SAMPLE_UART_NAME, RT_NAME_MAX); } /* 查找系统中的串口设备 */ serial = rt_device_find(uart_name); rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, &config); if (!serial) { rt_kprintf("find %s failed!\n", uart_name); return RT_ERROR; } /* 初始化信号量 */ rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO); /* 以中断接收及轮询发送模式打开串口设备 */ rt_device_open(serial, RT_DEVICE_FLAG_INT_RX); config.baud_rate = BAUD_RATE_9600; //配置串口通信为9600 config.data_bits = DATA_BITS_8; config.stop_bits = STOP_BITS_1; config.parity = PARITY_NONE; /* 打开设备后才可修改串口配置参数 */ rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, &config); /* 设置接收回调函数 */ rt_device_set_rx_indicate(serial, uart_input); /* 发送字符串 */ // rt_device_write(serial, 0, str, (sizeof(str) - 1)); /* 创建 serial 线程 */ rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10); /* 创建成功则启动线程 */ if (thread != RT_NULL) { rt_thread_startup(thread); } else { ret = RT_ERROR; } return ret; } /* 导出到 msh 命令列表中 */ MSH_CMD_EXPORT(mdr1, uart JUN);
可以自行添加到RT-thread的BSP中,并烧录到开发板中。