Hi. I have the following code:
messageprocesser.h
#ifndef INC_MESSAGEPROCESSER_H_
#define INC_MESSAGEPROCESSER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include "main.h"
#include "usbd_cdc.h"
#include <stdint.h>
#include <string.h>
#include <stdio.h>
void process_Message(uint8_t* message, uint16_t Len);
void message_Received(uint8_t* message, uint16_t Len);
void send_Message(uint8_t* cmd, uint8_t* data);
#endif /* INC_MESSAGEPROCESSER_H_ */messageprocesser.c
/*
* messageprocesser.c
*
* Created on: Jan 30, 2023
* Sorry for the dead code. I left it there so the error messages would make sense.
*/
#include "messageprocesser.h"
#include "main.h"
#include "usbd_cdc_if.h"
#include <string.h>
//Sample cmd: TOARM_FIRMV_00000000_4C\r\n
#define MESSAGE_LENGTH 25
#define COMMAND_CHAR 6 //See SW Protocol or sample cmd
#define COMMAND_LENGTH 5
#define DATA_CHAR 12
#define DATA_LENGTH 8
#define CHECKSUM_CHAR 21
#define CHECKSUM_LENGTH 2
void process_Message(uint8_t* message, uint16_t Len){
HAL_GPIO_TogglePin(GPIOF, GPIO_PIN_10);
unsigned char inputCmd[5];
unsigned char inputMessage[8];
unsigned char outputCmd[5];
unsigned char outputData[8];
//Function that separates message, inputCmd, and inputMessage.
// strcpy((char*) inputCmd, (const char*)message + COMMAND_CHAR);
// strcpy((char*) inputMessage, (const char*)message + DATA_CHAR);
if (strncmp(inputCmd, "FIRMV", COMMAND_LENGTH) == 0){
memcpy(outputCmd, "FIRMV", COMMAND_LENGTH);
memcpy(outputData, "01050A00", DATA_LENGTH);
}
else{
memcpy(outputCmd, "REEEE", COMMAND_LENGTH);
memcpy(outputData, "99999999", DATA_LENGTH);
}
// message_Received(message, Len);
send_Message(outputCmd, outputData);
}
void message_Received(uint8_t* message, uint16_t Len){
// HAL_GPIO_TogglePin(GPIOF, GPIO_PIN_10);
//CDC_Transmit_FS(message, Len);
// uint8_t inputCmd[5];
// uint8_t inputMessage[8];
}
void send_Message(uint8_t* cmd, uint8_t* data){
uint8_t outputMessage[MESSAGE_LENGTH] = "TOWST_";
strncpy_s((char*) outputMessage + COMMAND_CHAR, COMMAND_LENGTH, (const char*) cmd, COMMAND_LENGTH);
outputMessage[COMMAND_CHAR + COMMAND_LENGTH] = '_';
strncpy((char*) outputMessage + DATA_CHAR, (const char*) data, DATA_LENGTH); //Why does having 2 strcats break the system?
// strncpy((char*) outputMessage + DATA_CHAR, (const char*) '_', 1);
outputMessage[DATA_CHAR + DATA_LENGTH] = '_';
strncpy((char*) outputMessage + CHECKSUM_CHAR, (const char*) "27", CHECKSUM_LENGTH);
outputMessage[23] = '\r';
outputMessage[24] = '\n';
// strcat((char*) outputMessage, (const char*) data);
// strcat((char*) outputMessage, (const char*) '_');
// uint8_t test_message[64] = "TOWST_VERAK_01050A00_27\r\n";
// CDC_Transmit_FS(test_message, sizeof(test_message));
CDC_Transmit_FS(outputMessage, sizeof(outputMessage));
}The error and the warning:
../Core/Src/messageprocesser.c: In function 'send_Message':
../Core/Src/messageprocesser.c:56:2: warning: implicit declaration of function 'strncpy_s'; did you mean 'strncpy'? [-Wimplicit-function-declaration]
56 | strncpy_s((char*) outputMessage + COMMAND_CHAR, COMMAND_LENGTH, (const char*) cmd, COMMAND_LENGTH);
| ^~~~~~~~~
| strncpyc:\st\stm32cubeide_1.6.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_1.5.0.202011040924\tools\arm-none-eabi\bin\ld.exe: Core/Src/messageprocesser.o: in function `send_Message':
C:/Users/User/STM32CubeIDE/workspace_1.6.0/usbtest/Debug/../Core/Src/messageprocesser.c:56: undefined reference to `strncpy_s'My understanding of strncpy_s is that it is a part of C11, and it is part of the string.h header file. I am unsure why my compiler does not consider strncpy_s as a valid preexisting operator.
My compiler is GNU11, so it should include C11 based on my understanding.
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