在serial_v2中,rt_device_open()函数将会调用框架层的rt_serial_init()与rt_serial_open()函数,从而根据已有的配置,从三种硬件工作模式中选择其中一种。 //串口初始化函数 //先将发送与接收缓冲区初始化为NULL, 然后对波特率等参数进行设置 static rt_err_t rt_serial_init(struct rt_device * dev) { .....
全局变量 staticstruct rt_serial_device *serial; 改成 static rt_device_t serial_dev = RT_NULL;。所有使用 serial 这个变量的地方全换成使用 serial_dev 。 这样修改了以后,一切变得明朗了起来。 总结 除了上面提到的那个问题,笔者还遇到一种情况,slave 端接收串口数据经常出现断帧,而且字符接收间隔长达 10+...
static void ab32_stop_tx(struct rt_serial_device *serial) { struct ab32_uart *uart; RT_ASSERT(serial != RT_NULL); uart = rt_container_of(serial, struct ab32_uart, serial); hal_uart_control(uart->handle.instance, UART_TXIT_ENABLE, HAL_DISABLE); uart->intTxing = RT_FALSE; } 为...
经过一步步代码调试跟踪,得到函数调用链 tcsetattr -> ioctl -> fcntl -> dfs_file_ioctl -> serial_fops_ioctl -> rt_device_control -> rt_serial_control -> nu_uart_configure ,最后这个函数有一句 nu_sys_ip_reset(((nu_uart_t)serial)->rstidx); ,这句会复位中断寄存器的值。 第二次运行测试程...
struct rt_uart_ops { // 用于配置外设寄存器,引脚功能复用,启用外设等等 rt_err_t (*configure)(struct rt_serial_device *serial, struct serial_configure *cfg); // 用于使能禁用中断,初始配置 DMA rt_err_t (*control)(struct rt_serial_device *serial, int cmd, void *arg); // 串口外设写数据...
struct rt_serial_device serial; struct stm32_uart_config *config; #ifdef RT_SERIAL_USING_DMA rt_bool_t dmaTxing; struct { DMA_HandleTypeDef handle; } dma_rx; struct { DMA_HandleTypeDef handle; } dma_tx; rt_uint16_t uart_dma_flag; #endif }; #endif /* __DRV_USART_H__ */5 bsp...
{ struct earlycon_device *device = console->data; struct uart_port *port = &device->port; unsigned int status; int num_read = 0; while (num_read < count) { status = serial8250_early_in(port, UART_LSR); if (!(status & UART_LSR_DR)) break; s[num_read++] = serial8250_early_...
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; } /*uart0串口输出线程*/ ...
* @param serial serial device * * @return length */ static rt_size_t rt_dma_calc_recved_len(struct rt_serial_device *serial) { static rt_size_t rx_length; struct rt_serial_rx_fifo *rx_fifo = (struct rt_serial_rx_fifo *)serial->serial_rx; RT_ASSERT(rx_fi...
publicstructX509IssuerSerial 继承 Object ValueType X509IssuerSerial 示例 下面的代码示例演示如何使用证书存储中的 X.509 证书对 XML 文档进行签名和验证。 此示例使用X509IssuerSerial对象将关键信息保存到已签名的文档。 C#复制 /// This example signs an XML file using an// envelope signature. It...