PIO Unit Testing STM32F446RE Nucleo


Hi, I am a new user and trying to upload the code that i got from open source project (Openchair - hackaday.io) to STM32F446RE board, But I see an error with Build and PIO test. i’m confused what is this error that makes the platform is not working? the error message is below.

[test::*] Building… (1/3)
Please wait…
C:\Users\i3 ivy.platformio\packages\framework-mbed\platform \mbed_critical.c: In function ‘core_util_critical_section_exit’:

C:\Users\i3 ivy.platformio\packages\framework-mbed\platform\mbed_critical.c:86:14: warning: unused variable ‘interrupts_disabled’ [-Wunused-variable]
bool interrupts_disabled = !core_util_are_interrupts_enabled(); /* get the current interrupt disabled state */

C:\Users\i3 ivy.platformio\packages\framework-mbed\targets\TARGET_STM\TARGET_STM32F4\device\stm32f4xx_hal_pcd.c: In function ‘PCD_WriteEmptyTxFifo’:

C:\Users\i3 ivy.platformio\packages\framework-mbed\targets\TARGET_STM\TARGET_STM32F4\device\stm32f4xx_hal_pcd.c:1285:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (len > ep->maxpacket)
C:\Users\i3 ivy.platformio\packages\framework-mbed\targets\TARGET_STM\TARGET_STM32F4\device\stm32f4xx_hal_pcd.c:1300:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (len > ep->maxpacket)
C:\Users\i3 ivy.platformio\packages\framework-mbed\targets\TARGET_STM\TARGET_STM32F4\device\stm32f4xx_hal_pcd.c:1312:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if(len <= 0U)

lib\OpenChair\OpenChair.cpp: In member function ‘void OpenChair::drive(double, double, int)’:
lib\OpenChair\OpenChair.cpp:35:19: warning: ‘motBS’ may be used uninitialized in this function [-Wmaybe-uninitialized]
motB=constrain(motBTS+motBS, -1, 1);

lib\OpenChair\OpenChair.cpp:34:19: warning: ‘motAS’ may be used uninitialized in this function [-Wmaybe-uninitialized]
motA=constrain(motATS+motAS, -1, 1);

.pioenvs/nucleo_f446re/test/output_export.o:(.bss.pc+0x0): multiple definition of `pc’
.pioenvs/nucleo_f446re/src/main.o:(.bss.pc+0x0): first defined here

collect2.exe: error: ld returned 1 exit status
*** [.pioenvs\nucleo_f446re\firmware.elf] Error 1
[ERROR] Took 26.95 seconds

Severity Provider Description Line
PIO Test
0 files

Code in openchair.cpp

#include “OpenChair.h”

OpenChair::OpenChair(PinName pinMot1Tx, PinName pinMot1Rx, PinName pinMot2Tx, PinName pinMot2Rx, int ms, int Ms):
motor1(pinMot1Tx,pinMot1Rx),motor2(pinMot2Tx,pinMot2Rx), pc(SERIAL_TX, SERIAL_RX){
if(maxSpeed>512) maxSpeed=512;
// pc.baud(115200);

void OpenChair::drive(double steering, double throttle,int mode){
double motA, motAS, motATS, motB, motBS, motBTS;

if(mode==1 && throttle<0){
    motATS=constrain(throttle*(1-steering), -1, 1);
    motBTS=constrain(throttle*(1+steering), -1, 1);
    motATS=constrain(throttle*(1+steering), -1, 1);
    motBTS=constrain(throttle*(1-steering), -1, 1);
else if(mode==0){
motA=constrain(motATS + motAS, -1, 1);
motB=constrain(motBTS + motBS, -1, 1);
pc.printf("Motor A, B: %.02f    %.02f\n",motA,motB);


Please anyone be able to help simple instructions as to how?
I am using PlatformIO atom-ide and windows 7 x64 installation

https://hackaday.io/project/13347-openchair openchair is open project to modify manual wheelchair into an electric using a hoverboard motor, I see some videos from this project work well.

Many thanks for your reply and help.


Someone, please let me know if this warning message is error? as the code owner says “The motATS + motAS should not be an error, it could be anything from a missing dependency to an incompatible”.

Please help me, thanks a lot


Please read this http://docs.platformio.org/en/latest/plus/unit-testing.html#workflow

You need to wrap main code in main.cpp with #ifndef UNIT_TEST guard…


It is nice when seeing the problem resolved. By the way, did you get successful with solution?


Which problems do you have with PIO Unit Testing?