disabling optimization on part of code

[bloobird0]

hello all,

do you know if there is a way to disable code optimization only on some part of code?

I use optimization level 1 in Keil (otherwise the code does not fit in the 32KB Keil limitation). Do Unfortunately I just saw that the following command is not compiled (unable to set a breakpoint on this line).

nrf_gpio_cfg_sense_input(15, NRF_GPIO_PIN_PULLUP, NRF_GPIO_PIN_SENSE_LOW);

I would like to keep the optimization level to 1 but disable optimisation on this specific line. Do you know if this is possible? Otherwise, do you know how I could force the compiler to include this code in binary?

Without this line, I can't use a pin to wakeup from system off state.

Thanks in advance for your answer.

nRF52 - S132 - SDK11 - Keil

[FormerMember]

Not sure, but replacing the inline function with directly writing to the register as shown below might enable you to set a breakpoint.

NRF_GPIO->PIN_CNF[15] = (NRF_GPIO_PIN_SENSE_LOW << GPIO_PIN_CNF_SENSE_Pos) | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos) | (NRF_GPIO_PIN_PULLUP << GPIO_PIN_CNF_PULL_Pos) | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);

[RK]

Just because you can't set a breakpoint on the line doesn't mean the code hasn't been compiled. It's been compiled and it's in the executable, it just has been optimised so there is no debug information about that line.

You have misidentified your problem.

[bjorn-spockeli]

You can set the optimization level of individual files in Keil by right-clicking them, select "Options for file" and then select the "C/C++" tab, see attached screenshot.

-Bjørn

[bloobird0]

@RK: I agree with you. Because the behaviour was not the same between optimization levels 0 and 1, I thought it could be an optimization problem.

[bloobird0]

Thanks. It should do the work.