修改pin

添加ltdc
添加modbus

applications/DATA_uart1.c

@@ -22,7 +22,7 @@ static struct rt_semaphore rx_sem;
 
 #define RX_LINE_BUF_SIZE     1024
 #define RS485_SAMPLE_SLAVE_SERIAL       "uart1"
-#define RS485_SAMPLE_SLAVE_BAUDRATE     115200
+#define RS485_SAMPLE_SLAVE_BAUDRATE     57600
 #define RS485_SAMPLE_MASTER_PARITY      0 //0 -- none parity
 #define RS485_SAMPLE_SLAVE_PIN          -1 //-1 -- nonuse rs485 mode control
 #define RS485_SAMPLE_SLAVE_LVL          1
@@ -89,7 +89,7 @@ void uart_thread_entry(void *parameter)
 
 int start_uart_thread(void)
 {
-    rt_thread_t tid = rt_thread_create("uart1",uart_thread_entry,RT_NULL,2048,21,10);
+    rt_thread_t tid = rt_thread_create("sccm",uart_thread_entry,RT_NULL,2048,21,10);
     if (tid != RT_NULL)
     {
         rt_thread_startup(tid);

applications/DATA_uart2.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-10-20     Administrator       the first version
+ * 2025-11-12     Modified            Switch to IDLE interrupt mode (no DMA, no ringbuffer)
+ * 2025-11-21     Fixed               Enable RX_IDLE mode correctly for RT-Thread 5.1
+ */
+
+#include "rtthread.h"
+#include "modbus.h"
+
+#define DBG_TAG "plc.rtu"
+#define DBG_LVL DBG_LOG
+#include <rtdbg.h>
+
+static const mb_backend_param_t mb_bkd_prm = {
+    .rtu.dev = "uart2",     //设备名
+    .rtu.baudrate = 57600,   //波特率
+    .rtu.parity = 0,        //校验位, 0-无, 1-奇, 2-偶
+    .rtu.pin = -1,          //控制引脚, <0 表示不使用
+    .rtu.lvl = 0            //控制发送电平
+};
+
+
+static void mb_plc_read_regs(mb_inst_t *hinst)
+{
+    if (mb_connect(hinst) < 0)//连接失败, 延时返回
+    {
+        LOG_E("modbus connect fail.");
+        return;
+    }
+
+    u16 regs[64];
+    int addr = 7000;
+    int nb = 10;
+    int total = mb_read_input_regs(hinst, addr, nb, regs);
+    if (total <= 0)
+    {
+        LOG_E("modbus read register fail.");
+        return;
+    }
+    u8 regsM[64];
+    int addrM = 3000;
+    int nbM = 10;
+    int totalM = mb_read_bits(hinst, addrM, nbM, regsM);
+    if (totalM <= 0)
+    {
+        LOG_E("modbus read register fail.");
+        return;
+    }
+}
+
+static void mb_plc_thread(void *args)//线程服务函数
+{
+    mb_inst_t *hinst = mb_create(MB_BACKEND_TYPE_RTU, &mb_bkd_prm);
+    RT_ASSERT(hinst != NULL);
+
+    mb_set_slave(hinst, 1);//修改从机地址, 默认地址为1, 可根据实际情况修改
+    mb_set_prot(hinst, MB_PROT_RTU);//修改通信协议类型, RTU后端默认使用MODBUS-RTU通信协议
+    mb_set_tmo(hinst, 500, 15);//修改超时时间, 应答超时500ms(默认300ms), 字节超时15ms(默认32ms)
+
+    while(1)
+    {
+        mb_plc_read_regs(hinst);
+        rt_thread_mdelay(50);
+    }
+}
+
+static int mb_rtu_master_startup(void)
+{
+    rt_thread_t tid = rt_thread_create("plc_rtu", mb_plc_thread, NULL, 2048, 5, 20);
+    RT_ASSERT(tid != NULL);
+    rt_thread_startup(tid);
+    return(0);
+}
+INIT_APP_EXPORT(mb_rtu_master_startup);

applications/INI/ini.c

@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <ctype.h>
 #include "ini.h"