libmodbus version libmodbus-3.4.1 OS and/or distribution OpenWRT CC compiled for mips Description Hi used function modbus_rtu_set_custom_rts(), for manage trasmition direction using a gpio of my HW. I insert this function in main modbus ...
modbus_rtu_set_serial_mode(ctx, MODBUS_RTU_RS485); modbus_rtu_set_rts(ctx, RS485_RE, MODBUS_RTU_RTS_UP); modbus_set_slave(ctx, CONFIG_SLAVE_ID);/* 设置从机地址 */modbus_set_debug(ctx,1); modbus_set_response_timeout(ctx,0,1000000); mb_mapping = modbus_mapping_new(0,0, CONFIG...
MODBUS_API int modbus_rtu_get_rts(modbus_t *ctx); MODBUS_API int modbus_rtu_set_custom_rts(modbus_t *ctx, void (*set_rts) (modbus_t *ctx, int on)); MODBUS_API int modbus_rtu_set_rts_delay(modbus_t *ctx, int us); MODBUS_API int modbus_rtu_get_rts_delay(modbus_t *ctx); ...
MODBUS_API int modbus_rtu_set_serial_mode (modbus_t * ctx, int mode): 该函数用于设置串口为 MODBUS RTURS232或MODBUSRTU_RS485模式,此函数只适用于 Linux 操作系统下。 MODBUS_API int modbus_rtu_set_rts (modbus_t * ctx, int mode)。 MODBUS_API int modbus_rtu_set_custom_rts (modbus_t * ...
modbus_rtu_set_rts(ctx, MODBUS_RTS_DOWN);// 启动Modbus RTU监听rc = modbus_listen(ctx,1);if(rc ==-1) {fprintf(stderr,"Modbus RTU监听失败\n"); modbus_free(ctx);exit(1); }printf("Modbus RTU从机已启动,等待主机连接...\n");// 处理Modbus请求for(;;) { ...
#include "modbus-rtu.h" #include "modbus-rtu-private.h" #if HAVE_DECL_TIOCSRS485 || HAVE_DECL_TIOCM_RTS #include <sys/ioctl.h> #endif #if HAVE_DECL_TIOCSRS485 #include <linux/serial.h> #endif /* Table of CRC values for high-order byte */ ...
LRC校验计算需要把RTU码(包括CRC校验)计算得出:算法计算自行查询。 流控制 Serial Port通讯参数设置,高级设置——数据流控制。软流控,硬流控。 DSR- Data Set Ready,数据准备好 CTS- Clear To Send,清除发送 DTR- Data Terminal Ready,数据终端准备好
if ( 0 == modbus_rtu_set_serial_mode(ctx, MODBUS_RTU_RS485)) printf("INFO :: RTU Serial Mode Set Successfully ...\n"); //modbus_rtu_set_rts(ctx, MODBUS_RTU_RTS_UP); if ( 0 == modbus_rtu_set_custom_rts(ctx, csetrts)) ...
modbus_t *modbus_new_rtu(const char *device, int baud,char parity, int data_bit, int stop_bit) 设置串口模式 int modbus_rtu_set_serial_mode(modbus_t *ctx, int mode) 在RTU环境下设置RTS模式,为RS485模式下设置控制引脚 int modbus_rtu_set_rts(modbus_t *ctx, int rts_pin, int mode) ...
#include "MDM_RTU_Serial.h"#endif vu32 sys_tick_100us=0;void TIM3_Int_Init(u16 arr,u16 ...