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[活动专区] 【杰发科技AC7802x测评】linux下开发-实现串口空闲不定长数据收发

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 楼主| lulugl 发表于 2023-6-3 20:49 | 显示全部楼层 |阅读模式
AC, linux, 串口, 数据收发
【杰发科技AC7802x测评】linux下开发按键中断试验 - - 21ic电子技术开**坛
在这篇的基础之上，我们今天学习使用AC7802的串口收发。
1、把原来的工程复制一份到新的文件夹，并重命名为AC7802_UART工程。
2、新建Uart.h、Uart.c，内容如下：
复制
  1. #ifndef __UART_H__
    

  2. #define __UART_H__
    

  3. #include "ac780x_uart.h"
    


  4. 

  5. void UART_Cfg_Init(void);
    


  6. 

  7. #endif
Uart.c
复制
  1. #include <stdbool.h>
    

  2. #include "ac780x_gpio.h"
    

  3. #include "ac780x_uart_reg.h"
    

  4. #include "Uart.h"
    


  5. 

  6. #define RX_BUF_LEN   100U
    


  7. 

  8. uint8_t g_rxLen  = 0;                 /*!< 串口接收长度变量 */        
    

  9. uint8_t g_txLen  = 0;                 /*!< 串口发送长度变量 */
    

  10. uint8_t g_txCnt  = 0;
    

  11. uint8_t g_rxBuf[RX_BUF_LEN] = {0};    /*!< 串口接收数组 */     
    


  12. 

  13. /*!
    

  14.  * [url=home.php?mod=space&uid=247401]@brief[/url]   串口回调函数
    

  15.  *
    

  16.  * @param   void *device：UART_Type pointer
    

  17.             uint32_t wpara：UART lsr0 register
    

  18.             uint32_t lpara：UART lsr1 register
    

  19.  * [url=home.php?mod=space&uid=266161]@return[/url]  none
    

  20.  */
    

  21. void UART_Callback(void *device, uint32_t wpara, uint32_t lpara)
    

  22. {
    

  23.     UART_Type *Uart_Device = (UART_Type *)device;
    


  24. 

  25.     /*! 串口接收中断 */
    

  26.     if(wpara & UART_LSR0_DR_Msk)
    

  27.     {
    

  28.         g_rxBuf[g_rxLen++] = UART_ReceiveData(Uart_Device);
    


  29. 

  30.         if(g_rxLen > RX_BUF_LEN)
    

  31.         {
    

  32.             g_rxLen = 0;
    

  33.         }
    

  34.     }
    


  35. 

  36.     /*!< 发送fifo空中断  */
    

  37.     if(Uart_Device->IER & UART_IER_ETXE_Msk)
    

  38.     {
    

  39.         UART_SendData(Uart_Device,g_rxBuf[g_txCnt++]);
    


  40. 

  41.         if(g_txCnt >= g_txLen)
    

  42.         {
    

  43.             g_txCnt = 0;
    

  44.             UART_SetTXEInterrupt(Uart_Device, DISABLE);
    

  45.         }
    

  46.     }
    


  47. 

  48.     /*!< 串口空闲中断 */
    

  49.     if(lpara & UART_LSR1_IDLE_Msk)
    

  50.     {
    

  51.         g_txLen = g_rxLen;    
    

  52.         g_rxLen = 0;
    


  53. 

  54.         UART_SetTXEInterrupt(Uart_Device, ENABLE);
    

  55.     }
    

  56. }
    


  57. 

  58. /*!
    

  59.  * @brief   uart configuration init
    

  60.  *
    

  61.  * @param   none
    

  62.  * @return  none
    

  63.  */
    

  64. void UART_Cfg_Init(void)
    

  65. {
    

  66.     UART_ConfigType uart_config;
    


  67. 

  68.     GPIO_SetFunc(GPIOA, GPIO_PIN4, GPIO_FUN3);    /*! uart tx */
    

  69.     GPIO_SetFunc(GPIOA, GPIO_PIN5, GPIO_FUN3);    /*! uart rx */
    


  70. 

  71.     uart_config.baudrate   = 115200;              /*! 波特率115200 */
    

  72.     uart_config.dataBits   = UART_WORD_LEN_8BIT;  /*! 数据8bit */
    

  73.     uart_config.stopBits   = UART_STOP_1BIT;      /*! 停止位1bit */
    

  74.     uart_config.fifoByteEn = DISABLE;   
    

  75.     uart_config.sampleCnt  = UART_SMP_CNT0;       /*! 16倍采样 */
    

  76.     uart_config.callBack   = UART_Callback;       /*! 回调函数设置 */
    


  77. 

  78.     UART_Init(UART1,&uart_config);                /*! 串口初始化 */
    


  79. 

  80.     UART_SetRXNEInterrupt(UART1, ENABLE);         /*! 串口接收中断使能 */
    


  81. 

  82.     UART_SetIdleFuncEn(UART1, ENABLE);
    

  83.     UART_SetIdleInterrupt(UART1, ENABLE);         /*! 使能串口空闲中断 */
    


  84. 

  85.     NVIC_SetPriority(UART1_IRQn, 3);              /*! 串口中断优先级 */
    

  86.     NVIC_ClearPendingIRQ(UART1_IRQn);
    

  87.     NVIC_EnableIRQ(UART1_IRQn);
    

  88. }
3、修改makefile内容中的TARGET 为：AC7802_UART。去掉原来gpio.c，新建Uart.c，增加ac78x_uart.c：
复制
  1. # C sources
    

  2. C_SOURCES =  \
    

  3. Src/main.c \
    

  4. Src/AC7802x_irq_cb.c \
    

  5. Src/AC7802x_msp.c \
    

  6. Src/system_AC7802x.c \
    

  7. Drivers/ATC_Driver/Src/ac780x_gpio.c \
    

  8. Drivers/ATC_Driver/Src/ac780x_ckgen.c \
    

  9. Drivers/ATC_Driver/Src/ac780x_spm.c  \
    

  10. Drivers/ATC_Driver/Src/ac780x_uart.c \
    

  11. User/Src/Uart.c
4、make结果如下：
复制
  1. lugl@lugl-virtual-machine:~/ac7802/AC7802_UART$ make
    

  2. mkdir build
    

  3. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/main.d" -Wa,-a,-ad,-alms=build/main.lst Src/main.c -o build/main.o
    

  4. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/AC7802x_irq_cb.d" -Wa,-a,-ad,-alms=build/AC7802x_irq_cb.lst Src/AC7802x_irq_cb.c -o build/AC7802x_irq_cb.o
    

  5. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/AC7802x_msp.d" -Wa,-a,-ad,-alms=build/AC7802x_msp.lst Src/AC7802x_msp.c -o build/AC7802x_msp.o
    

  6. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/system_AC7802x.d" -Wa,-a,-ad,-alms=build/system_AC7802x.lst Src/system_AC7802x.c -o build/system_AC7802x.o
    

  7. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/ac780x_gpio.d" -Wa,-a,-ad,-alms=build/ac780x_gpio.lst Drivers/ATC_Driver/Src/ac780x_gpio.c -o build/ac780x_gpio.o
    

  8. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/ac780x_ckgen.d" -Wa,-a,-ad,-alms=build/ac780x_ckgen.lst Drivers/ATC_Driver/Src/ac780x_ckgen.c -o build/ac780x_ckgen.o
    

  9. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/ac780x_spm.d" -Wa,-a,-ad,-alms=build/ac780x_spm.lst Drivers/ATC_Driver/Src/ac780x_spm.c -o build/ac780x_spm.o
    

  10. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/ac780x_uart.d" -Wa,-a,-ad,-alms=build/ac780x_uart.lst Drivers/ATC_Driver/Src/ac780x_uart.c -o build/ac780x_uart.o
    

  11. arm-none-eabi-gcc -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/Uart.d" -Wa,-a,-ad,-alms=build/Uart.lst User/Src/Uart.c -o build/Uart.o
    

  12. arm-none-eabi-gcc -x assembler-with-cpp -c -mcpu=cortex-m0plus -mthumb    -IInc -IDrivers/ATC_Driver/Inc -IDrivers/Device/Include -IDrivers/Device -IDrivers/Device/Include/CMSIS -IUser/Inc -O0 -Wall -fdata-sections -ffunction-sections -g -gdwarf-2 -MMD -MP -MF"build/startup_AC7802x.d" startup_AC7802x.s -o build/startup_AC7802x.o
    

  13. arm-none-eabi-gcc build/main.o build/AC7802x_irq_cb.o build/AC7802x_msp.o build/system_AC7802x.o build/ac780x_gpio.o build/ac780x_ckgen.o build/ac780x_spm.o build/ac780x_uart.o build/Uart.o build/startup_AC7802x.o -mcpu=cortex-m0plus -mthumb   -specs=nano.specs -TAC78022MBQA_FLASH.ld  -lc -lm -lnosys  -Wl,-Map=build/AC7802_UART.map,--cref -Wl,--gc-sections -o build/AC7802_UART.elf
    

  14. arm-none-eabi-size build/AC7802_UART.elf
    

  15.    text    data     bss     dec     hex filename
    

  16.   12016      12    2220   14248    37a8 build/AC7802_UART.elf
    

  17. arm-none-eabi-objcopy -O ihex build/AC7802_UART.elf build/AC7802_UART.hex
    

  18. arm-none-eabi-objcopy -O binary -S build/AC7802_UART.elf build/AC7802_UART.bin
5、输入下载命令：
复制
  1. lugl@lugl-virtual-machine:~/ac7802/AC7802_UART$ pyocd flash ./build/AC7802_UART.elf --target ac78022mbqa
    

  2. 0000426 I Loading /home/lugl/ac7802/AC7802_UART/build/AC7802_UART.elf [load_cmd]
    

  3. [==================================================] 100%
    

  4. 0001139 I Erased 0 bytes (0 sectors), programmed 0 bytes (0 pages), skipped 12288 bytes (24 pages) at 16.84 kB/s [loader]
6、同时为了方便下载，我们在makefile后面增加 makefile flash命令实现下载:
复制
  1. flash:
    

  2.         pyocd flash ./build/AC7802_UART.elf --target ac78022mbqa
我们在执行make falsh后就可以实现下载功能了：
复制
  1. lugl@lugl-virtual-machine:~/ac7802/AC7802_UART$ make flash
    

  2. pyocd flash ./build/AC7802_UART.elf --target ac78022mbqa
    

  3. 0000445 I Loading /home/lugl/ac7802/AC7802_UART/build/AC7802_UART.elf [load_cmd]
    

  4. [==================================================] 100%
    

  5. 0001146 I Erased 0 bytes (0 sectors), programmed 0 bytes (0 pages), skipped 12288 bytes (24 pages) at 17.16 kB/s [loader]
    

  6. l
7、实现效果：下载后，我们用typec线接到开发板的typec接口，打开串口助手，我们就可以实现不定义发送，同时AC7802把接收到的数据回显回来：
复制
  1. [20:21:10.657]发→◇AT1313123112123123
    


  2. 

  3. □
    

  4. [20:21:10.661]收←◆AT1313123112123123
    


  5. 


  6. 

  7. [20:47:13.157]发→◇AT13131231
    


  8. 


  9. 

  10. □
    

  11. [20:47:13.160]收←◆AT13131231
    


  12. 


  13. 


  14. 

  15. [20:47:22.561]发→◇你好
    


  16. 


  17. 

  18. □
    

  19. [20:47:22.563]收←◆你好
    


  20. 


  21. 


  22. 

  23. [20:47:30.890]发→◇你好 AC7802X
    


  24. 


  25. 

  26. □
    

  27. [20:47:30.893]收←◆你好 AC7802X
【总结】杰发的库函数做得非常好，给的示例也非常好，使得学习起来非常快捷。同时在linux环境下，用vscode也开发，也是非常之方便。体验了编程之快乐！
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