Linux/SW-EK-TM4C123GXL: undefined reference to `GPIOPinRead'

You've provided an excellent description of your issue and your Subject Line (missed by so many here) is perfect!       (Clearly identifies your issue - vastly superior to the (so often appearing) "inane" TM4xyx: TM4xyz"!)    (What were the forum designers thinking - beyond "Banning LIKE?")

To your issue - I feel (and share) your pain.      And even after reviewing your code - I cannot provide guaranteed direction.

I checked "gpio.h" and indeed (both) of your "references" - claimed as "undefined" - ARE present & defined!       Thus - somehow your compiler (appears) to "fail to find and/or (if found) reject the findings!"

What I do note is an "inconsistency" w/in your code.      Your code begins w/"Only calls to ROM functions" - and then shifts (abruptly) to "Non ROM calls!"       While suspected "legal" - it (may) make you vulnerable to the condition you report.

A quick check would see you remove those early "ROM_GPIOPinType() calls" - replace w/their "Non ROM" twins (leaving your "undefined" calls untouched) - and test/report...

Should this "fix" fail - read up on the "MAP" call - and use that for "ALL" of your function calls.     (consistency is (most often) Good!

Noted is your, "first ever forum post" - Welcome aboard - terrific job!

I don't think this is a compile error it's a link error.

pathi sudharshan said:

arm-none-eabi-ld -o build/a.out build/main.o build/startup_gcc.o -T TM4C123GH6PM.ld --entry ResetISR --gc-sections
build/main.o: In function `main':
/home/sudha/tmc4123/Embedded/led-project/src/main.c:29: undefined reference to `GPIOPinRead'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:32: undefined reference to `GPIOPinWrite'

Typically, when an error mentions an undefined reference, it's not talking about a missing prototype but a missing definition. Check that the appropriate library is included in the link and is present wherever you've referenced it.

Robert

"A quick check would see you remove those early "ROM_GPIOPinType() calls" - replace w/their "Non ROM" twins (leaving your "undefined" calls untouched) - and test/report..."

I tried by removing function thar are prefixed with ROM and here is the code

20 int main()
21 {
22 SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
23 SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
24 GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, LED_RED|LED_BLUE|LED_GREEN);
25 GPIOPinTypeGPIOInput(GPIO_PORTF_BASE, SW2);
26
27 for (;;) {
28 // set the red LED pin high, others low
29 if (GPIOPinRead(GPIO_PORTF_BASE,SW2)) {
30 GPIOPinWrite(GPIO_PORTF_BASE, LED_GREEN, LED_GREEN);
31 } else {
32 GPIOPinWrite(GPIO_PORTF_BASE, LED_GREEN, 0);
33 }
34 }
35 }
36


But sill I am getting the same problem

sudha@VCHN172:~/tmc4123/Embedded/led-project$ make
arm-none-eabi-gcc -o build/main.o src/main.c -g -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Os -ffunction-sections -fdata-sections -MD -std=c99 -Wall -pedantic -DPART_TM4C123GH6PM -c -I/home/sudha/tmc4123/Embedded/tivaware -DTARGET_IS_BLIZZARD_RA1
arm-none-eabi-gcc -o build/startup_gcc.o src/startup_gcc.c -g -mthumb -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -Os -ffunction-sections -fdata-sections -MD -std=c99 -Wall -pedantic -DPART_TM4C123GH6PM -c -I/home/sudha/tmc4123/Embedded/tivaware -DTARGET_IS_BLIZZARD_RA1
arm-none-eabi-ld -o build/a.out build/main.o build/startup_gcc.o -T TM4C123GH6PM.ld --entry ResetISR --gc-sections
build/main.o: In function `main':
/home/sudha/tmc4123/Embedded/led-project/src/main.c:22: undefined reference to `SysCtlClockSet'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:23: undefined reference to `SysCtlPeripheralEnable'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:24: undefined reference to `GPIOPinTypeGPIOOutput'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:25: undefined reference to `GPIOPinTypeGPIOInput'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:29: undefined reference to `GPIOPinRead'
/home/sudha/tmc4123/Embedded/led-project/src/main.c:32: undefined reference to `GPIOPinWrite'
Makefile:57: recipe for target 'build/a.out' failed
make: *** [build/a.out] Error 1


I have read from the link eehusky.wordpress.com/.../

The Stellaris Launchpad comes preloaded with a copy of driverlib in ROM so that when you are creating your programs you don’t need to link in a copy of driverlib yourself. What the MAP_ and ROM_ prefixes are meant to accomplish is increase the portability of applications you write for the LaunchPad. Different versions of the hardware will have different subsets of driverlib loaded into ROM.

would you please help me how to link the driverlib as a part of the compilation process.

Hi Robert Adsett,
GPIOPinRead function is present in driverlib folder. Would please help me how to link this library with the project