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How to optimize this generated code?

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Xiaojie Qiu
Xiaojie Qiu on 5 Mar 2018
Commented: Xiaojie Qiu on 20 Mar 2018
Hi everyone,
I'm using embedded coder to generate code for an STM32 microcontroller, but having problem with optimizing generated code.
As shown in figure below, I want to reset two GPIOs to LOW.
However, the generated code for this algorithm is:
if (0.0 == 0)
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_RESET);
else
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_SET);
if (0.0 == 0)
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_4, GPIO_PIN_RESET);
else
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_4, GPIO_PIN_SET);
But I don't think it's necessary to check if 0 equels 0. Instead, to save code execution time, the code should be:
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOD, GPIO_PIN_4, GPIO_PIN_RESET);
So, I'd like to know how to configue Simulink model to optimize this code?
Apart from this problem, what documentations for code optimization techniques would be highly recommended while using embedded coder?
Any recommendations would be highly appreciated.
Thanks and best regards! qxj

Answers (1)

Mark McBroom
Mark McBroom on 9 Mar 2018
Try changing the data type of the contant blocks to be integer or boolean.
  1 Comment
Xiaojie Qiu
Xiaojie Qiu on 20 Mar 2018
Hi Mark, thanks for your help! I tried both uint8 and boolean data types for these two constant blocks. But the problem still stays.

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