Labs

1. Download and install STM32CubeIDE
2. Fill the questionnaire

1. File created during the session (zipped): main.zip

1. Create new project under STM32CubeIDE: File → New → STM32 Project → write name of project, select Empty → OK
2. Put content of this file into created (almost empty) main.c: blink.zip
3. Follow instructions to fulfill T01 - Light snake

1. Open project in the STM32CubeIDE tutorial-04.zip

#define setbit(reg, bit) ((reg) |= (1U << (bit)))
#define clearbit(reg, bit) ((reg) &= (~(1U << (bit))))
#define togglebit(reg, bit) ((reg) ^= (1U << (bit)))
#define getbit(reg, bit) ((reg & (1U << bit)) >> bit)
 
void EXTI15_10_IRQHandler()
{
    // change PR (pending interrupt) to 1, if is 0
    setbit(EXTI->PR, 13);
    // change of system LED
    togglebit(GPIOA->ODR, 5);
}
 
void buttonConfig(void)
{
    setbit(RCC->AHB1ENR, 2);
    // RCC->AHB1ENR |= 0x05; -- two GPIO's at once
    // activate pull-up
    setbit(GPIOC->PUPDR, 26);
 
    // System configuration controller clock enable, page 121
    setbit(RCC->APB2ENR, 14);
 
    // mask
    setbit(EXTI->IMR, 13);
 
    // IRQ on falling / rising 
    setbit(EXTI->FTSR, 13);
 
    // GPIOC 13 will be source of IRQ
    setbit(SYSCFG->EXTICR[3], 5);
 
    // enable IRQ
    NVIC_EnableIRQ(EXTI15_10_IRQn); // 40 ~ EXTI15_10_IRQn
 
    // the same !
    setbit(NVIC->ISER[40/32], 40%32);
}
 
void ledConfig()
{
    // minimal config
    setbit(RCC->AHB1ENR, 0);
    setbit(GPIOA->MODER, 10);
}
 
int main(void)
{
    ledConfig();
    buttonConfig();
 
    while (1)
    {
        // boring stuff here
    }
}