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Questions - bare-metal

Why does clock() returns -1 in C

I'm trying to implement an error handler using the clock() function from the "time.h" library. The code runs inside an embeeded system (Colibri IMX7 - M4 Processor). The function is used to ...
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Victor Hugo Martins Marques

gcc

bare-metal

m4

arm-none-eabi-gcc

imx7

Votes: 0

Answers: 3

Latest Answer

To answer the second part of your question: static clock_t start_time = clock(); is not allowed because the return value of the function clock() is not known until runtime, but in C the initializer o...
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Tom V

why there is a overlapped output at putty while calling a function is written using xuartps.h to send data to uart in normal mode in zynq?

I am trying to send data from zynq soc 7000 board to pc using uart through a function (driver xuartps.h). within the main program, the code works but calling it from function, output at putty gets ove...
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Roy

putty

uart

xilinx

bare-metal

zynq

Votes: 0

Answers: 1

Latest Answer

The inner loop which calls XUartPs_Send has a few mistakes. while(totalTransmittedBytes<byteCnt+2){ transmittedBytes = XUartPs_Send(&PiUart, (u8*)&p[totalTransmittedBytes],byteCnt); ...
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Soheil Shahrouz

how can I exclude libc from my bare metal arm compilation?

I am trying to compile my first bare metal project targeting an arm cortex-M0+ MCU. I am compiling with gcc arm-none-eabi. The system currently consists of: boot.s -- an assembly file containing inte...
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JeffreyABecker

c

arm

cortex-m

bare-metal

Votes: 0

Answers: 1

Latest Answer

in this case, my linker script file had an explicit discard section excluding libc, libgcc and libm. ::facepalm::
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JeffreyABecker

How to compile C++ freestanding / baremetal with g++?

C++ has many aspects, included by default, that are not desirable or even functional on embedded bare metal / free standing platforms. How can I configure g++ to compile C++ in a manner suitable for e...
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SRobertJames

c++

g++

embedded

bare-metal

freestanding

Votes: 0

Answers: 1

Latest Answer

The compiler option -ffreestanding is explicitly there for this purpose. It enables implementation-defined forms of main and it will disable various assumptions about standard library functions, optim...
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Lundin

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