Reading pins of a port in one line of code

[embedonix]

Posted on October 14, 2015 at 05:17

I am working on project which is generated by Cube and uses HAL drivers. I require to read states of a number of pins on a port. Currently I am doing like this:

  //read PC0 to PC7 to check for state (on or off)  report.BUTTONS_0_7.BIT_0 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_0);  report.BUTTONS_0_7.BIT_1 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_1);  report.BUTTONS_0_7.BIT_2 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_2);  report.BUTTONS_0_7.BIT_3 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_3);  report.BUTTONS_0_7.BIT_4 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_4);  report.BUTTONS_0_7.BIT_5 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_5);  report.BUTTONS_0_7.BIT_6 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_6);  report.BUTTONS_0_7.BIT_7 = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_7);I did not find any code in HAL that allows reading a number of pins of a port simultaneously. Is there a way to read a given amount of pins from a port, or half of them or all of them?If the HAL does not have this function, what alternative exist that would be compatible with HAL?Thanks #gpio #stm32 #hal

[Tesla DeLorean]

Posted on October 14, 2015 at 09:05

Something along the lines of

uint16_t pins = GPIOC->IDR; if (pins & GPIO_PIN_7)   puts(''Pin 7 High'');

[ESpra.1]

If I have a port that has more pins (e.g. STM32L552ZET6Q port E has pins 0 to 15), would something like this cover all of them, or would I have to run it for both bytes contained within the port?

[Tesla DeLorean]

uint16_t pins = GPIOE->IDR; // would read a bit vector of all 16 pins in the bank, Read the RM