串口,按键,消息,定时器.docxVIP

HYPERLINK /songqqnew/article/details/8249583 zigbee3-zstack 串口，按键，消息，定时器 协议栈中的串口接收流程串口在底层使用的是中断，轮询还是DMA呢？？答案从下面这个文件定义的宏可以得知在C:\Texas Instruments\ZStack-CC2530-2.3.0-1.4.0\Components\hal\target\CC2530EB\hal_board_cfg.h [cpp]? HYPERLINK /songqqnew/article/details/8249583 \o view plain view plain HYPERLINK /songqqnew/article/details/8249583 \o copy copy //默认开启DMA?? #ifndef?HAL_DMA?? ???????#define?HAL_DMA?TRUE?? #endif?? ?? //只要定义了以下4个宏，就相当于需要使用串口?? #ifndef?HAL_UART?? ????#if?(defined?ZAPP_P1)?||?(defined?ZAPP_P2)?||?(defined?ZTOOL_P1)?||?(defined?ZTOOL_P2)?? ????????#define?HAL_UART?TRUE?? ????#else?? ????????#define?HAL_UART?FALSE?? ????#endif?? #endif?? ?? //?HAL_UART和HAL_DMA都已经定义过了，所以协议栈里的串口默认使用的是DMA，而不是中断?? #if?HAL_UART?? ????//?Always?prefer?to?use?DMA?over?ISR.?? ????#if?HAL_DMA?? ????????#ifndef?HAL_UART_DMA?? ????????????#if?(defined?ZAPP_P1)?||?(defined?ZTOOL_P1)?? ????????????????#define?HAL_UART_DMA??1?? ????????????#elif?(defined?ZAPP_P2)?||?(defined?ZTOOL_P2)?? ????????????????#define?HAL_UART_DMA??2?? ????????????#else?? ????????????????#define?HAL_UART_DMA??1?? ????????????#endif?? ????????#endif?? ????????#define?HAL_UART_ISR??0?? ????#else?? ????????#ifndef?HAL_UART_ISR?? ????????????#if?(defined?ZAPP_P1)?||?(defined?ZTOOL_P1)?? ????????????#define?HAL_UART_ISR??1?? ????????????#elif?(defined?ZAPP_P2)?||?(defined?ZTOOL_P2)?? ????????????#define?HAL_UART_ISR??2?? ????????????#else?? ????????????#define?HAL_UART_ISR??1?? ????????????#endif?? ????????#endif?? ????????#define?HAL_UART_DMA??0?? ????#endif?? ?? ????//?Used?to?set?P2?priority?-?USART0?over?USART1?if?both?are?defined.?? ????#if?((HAL_UART_DMA?==?1)?||?(HAL_UART_ISR?==?1))?? ????????#define?HAL_UART_PRIPO?????????????0x00?? ????????#else?? ????????#define?HAL_UART_PRIPO?????????????0x40?? ????#endif?? ?? #else//否则?? ????#define?HAL_UART_DMA??0?? ????#define?HAL_UART_ISR??0?? #endif?? 在某个应用的初始化函数中顺序执行下面两个函数，比如在SampleApp_Init函数中，? MT_UartInit();? MT_UartRegisterTaskID(task_id);MT_UartRegi