这里使用RT-Thread中的随意一个BSP:如rt-thread\bsp\stm32\stm32l475-atk-pandora
menuconfig配置,默认配置皆可
scons --target=mdk5
构建工程,确保默认工程可以正常的编译
开启libmodbus
软件包,这里使用RTU模式,手动把软件包的例程copy到工程中
pkgs --update
下载libmodbus软件包到本地
重新构建工程,编译发现无法通过
Build started: Project: project *** Using Compiler 'V5.06 update 7 (build 960)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'rt-thread' compiling modbus.c... packages\libmodbus-latest\inc\modbus-private.h(84): error: #20: identifier "fd_set" is undefined int (*select) (modbus_t *ctx, fd_set *rset, struct timeval *tv, int msg_length); packages\libmodbus-latest\src\modbus.c(150): warning: #68-D: integer conversion resulted in a change of sign return MSG_LENGTH_UNDEFINED; packages\libmodbus-latest\src\modbus.c(184): error: #20: identifier "EBADF" is undefined if ((errno == EBADF || errno == ECONNRESET || errno == EPIPE)) { packages\libmodbus-latest\src\modbus.c(184): error: #20: identifier "ECONNRESET" is undefined if ((errno == EBADF || errno == ECONNRESET || errno == EPIPE)) { packages\libmodbus-latest\src\modbus.c(184): error: #20: identifier "EPIPE" is undefined if ((errno == EBADF || errno == ECONNRESET || errno == EPIPE)) { packages\libmodbus-latest\src\modbus.c(339): error: #20: identifier "fd_set" is undefined fd_set rset; packages\libmodbus-latest\src\modbus.c(355): warning: #223-D: function "FD_ZERO" declared implicitly FD_ZERO(&rset); packages\libmodbus-latest\src\modbus.c(356): warning: #223-D: function "FD_SET" declared implicitly FD_SET(ctx->s, &rset); packages\libmodbus-latest\src\modbus.c(381): error: #20: identifier "ETIMEDOUT" is undefined if (errno == ETIMEDOUT) { packages\libmodbus-latest\src\modbus.c(384): error: #20: identifier "EBADF" is undefined } else if (errno == EBADF) { packages\libmodbus-latest\src\modbus.c(395): error: #20: identifier "ECONNRESET" is undefined errno = ECONNRESET; packages\libmodbus-latest\src\modbus.c(402): error: #20: identifier "ECONNRESET" is undefined (errno == ECONNRESET || errno == ECONNREFUSED || packages\libmodbus-latest\src\modbus.c(402): error: #20: identifier "ECONNREFUSED" is undefined (errno == ECONNRESET || errno == ECONNREFUSED || packages\libmodbus-latest\src\modbus.c(403): error: #20: identifier "EBADF" is undefined errno == EBADF)) { packages\libmodbus-latest\src\modbus.c(910): error: #20: identifier "ENOPROTOOPT" is undefined errno = ENOPROTOOPT; packages\libmodbus-latest\src\modbus.c(912): warning: #111-D: statement is unreachable break; packages\libmodbus-latest\src\modbus.c: 4 warnings, 12 errors compiling modbus-rtu.c... packages\libmodbus-latest\src\modbus-rtu.c(18): error: #5: cannot open source input file "dfs_select.h": No such file or directory #include <dfs_select.h> packages\libmodbus-latest\src\modbus-rtu.c: 0 warnings, 1 error compiling serial.c... ..\..\..\components\drivers\serial\serial.c(890): error: #20: identifier "speed_t" is undefined speed_t speed; ..\..\..\components\drivers\serial\serial.c(896): error: #20: identifier "B2400" is undefined {B2400, BAUD_RATE_2400}, ..\..\..\components\drivers\serial\serial.c(897): error: #20: identifier "B4800" is undefined {B4800, BAUD_RATE_4800}, ..\..\..\components\drivers\serial\serial.c(898): error: #20: identifier "B9600" is undefined {B9600, BAUD_RATE_9600}, ..\..\..\components\drivers\serial\serial.c(899): error: #20: identifier "B19200" is undefined {B19200, BAUD_RATE_19200}, ..\..\..\components\drivers\serial\serial.c(900): error: #20: identifier "B38400" is undefined {B38400, BAUD_RATE_38400}, ..\..\..\components\drivers\serial\serial.c(901): error: #20: identifier "B57600" is undefined {B57600, BAUD_RATE_57600}, ..\..\..\components\drivers\serial\serial.c(902): error: #20: identifier "B115200" is undefined {B115200, BAUD_RATE_115200}, ..\..\..\components\drivers\serial\serial.c(903): error: #20: identifier "B230400" is undefined {B230400, BAUD_RATE_230400}, ..\..\..\components\drivers\serial\serial.c(904): error: #20: identifier "B460800" is undefined {B460800, BAUD_RATE_460800}, ..\..\..\components\drivers\serial\serial.c(905): error: #20: identifier "B921600" is undefined {B921600, BAUD_RATE_921600}, ..\..\..\components\drivers\serial\serial.c(906): error: #20: identifier "B2000000" is undefined {B2000000, BAUD_RATE_2000000}, ..\..\..\components\drivers\serial\serial.c(907): error: #20: identifier "B3000000" is undefined {B3000000, BAUD_RATE_3000000}, ..\..\..\components\drivers\serial\serial.c(910): error: #20: identifier "speed_t" is undefined static speed_t _get_speed(int baudrate) ..\..\..\components\drivers\serial\serial.c(920): error: #20: identifier "B0" is undefined return B0; ..\..\..\components\drivers\serial\serial.c(923): error: #20: identifier "speed_t" is undefined static int _get_baudrate(speed_t speed) ..\..\..\components\drivers\serial\serial.c(950): error: #20: identifier "TCIFLUSH" is undefined case TCIFLUSH: ..\..\..\components\drivers\serial\serial.c(951): error: #20: identifier "TCIOFLUSH" is undefined case TCIOFLUSH: ..\..\..\components\drivers\serial\serial.c(974): error: #20: identifier "TCOFLUSH" is undefined case TCOFLUSH: ..\..\..\components\drivers\serial\serial.c(910): warning: #177-D: function "_get_speed" was declared but never referenced static speed_t _get_speed(int baudrate) ..\..\..\components\drivers\serial\serial.c(923): warning: #177-D: function "_get_baudrate" was declared but never referenced static int _get_baudrate(speed_t speed) ..\..\..\components\drivers\serial\serial.c(936): warning: #177-D: function "_tc_flush" was declared but never referenced static void _tc_flush(struct rt_serial_device *serial, int queue) ..\..\..\components\drivers\serial\serial.c: 3 warnings, 19 errors ".\build\keil\Obj\rt-thread.axf" - 32 Error(s), 7 Warning(s). Target not created. Build Time Elapsed: 00:00:01
#include <errno.h>
-> #include <sys/errno.h>
#include <dfs_select.h>
-> #include <sys/select.h>
#include <sys/select.h>
https://gitee.com/zhangsz0516/nucleo_l476rg_pm/tree/master/libmodbus_master