瑞萨RA2L1驱动MAX3485实现RS485收发数据（e2 studio开发环境-FSP库驱动）

#include "hal_data.h" FSP_CPP_HEADER void R_BSP_WarmStart(bsp_warm_start_event_t event); FSP_CPP_FOOTER #include "led/bsp_led.h" #include "debug_uart/bsp_debug_uart.h" #include "key/key.h" #include "rs485/rs485.h" /*******************************************************************************************************************//** * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used. This function * is called by main() when no RTOS is used. **********************************************************************************************************************/ void hal_entry(void) { /* TODO: add your own code here */ IRQ_Init(); //开启按键中断 IO_Init(); // IO初始化 RS485_1_Init(); //RS485-1初始化 Debug_UART1_Init(); // SCI1 UART 调试串口初始化 printf("\r\n 欢迎使用启明2L1开发板。\r\n"); printf("\r\n 野火RS-485通讯实验例程\r\n"); printf("\r\n 实验步骤：\r\n"); printf("\r\n 1.使用导线连接好两个485通讯设备\r\n"); printf("\r\n 2.若使用两个2L1开发板进行实验，给两个开发板都下载本程序即可。\r\n"); printf("\r\n 3.准备好后，按下其中一个开发板的KEY1键，会使用485向外发送0-10的数字 \r\n"); printf("\r\n 4.若开发板的485接收到字节数据，会把数据以16进制形式打印出来。 \r\n"); while(1) { /*按键没有按下的时候，使RS485处于接收状态*/ RS485_1_RX; LED1_OFF; LED3_ON; } #if BSP_TZ_SECURE_BUILD /* Enter non-secure code */ R_BSP_NonSecureEnter(); #endif } /*******************************************************************************************************************//** * This function is called at various points during the startup process. This implementation uses the event that is * called right before main() to set up the pins. * * @param[in] event Where at in the start up process the code is currently at **********************************************************************************************************************/ void R_BSP_WarmStart (bsp_warm_start_event_t event) { if (BSP_WARM_START_RESET == event) { #if BSP_FEATURE_FLASH_LP_VERSION != 0 /* Enable reading from data flash. */ R_FACI_LP->DFLCTL = 1U; /* Would normally have to wait tDSTOP(6us) for data flash recovery. Placing the enable here, before clock and * C runtime initialization, should negate the need for a delay since the initialization will typically take more than 6us. */ #endif } if (BSP_WARM_START_POST_C == event) { /* C runtime environment and system clocks are setup. */ /* Configure pins. */ R_IOPORT_Open(&g_ioport_ctrl, g_ioport.p_cfg); } } #if BSP_TZ_SECURE_BUILD BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable (); /* Trustzone Secure Projects require at least one nonsecure callable function in order to build (Remove this if it is not required to build). */ BSP_CMSE_NONSECURE_ENTRY void template_nonsecure_callable () { } #endif