1. PRJ2: ESP2-UC
workshop 1
Introductie 1

2. Hoe dit onderdeel in elkaar zit Tooling GPIO
Leerdoelen vandaag
Hoe dit onderdeel in elkaar zit
Tooling
GPIO 2

3. Overzicht semester Periode 3 en 4 EC’s
Embedded Systems Project 2: sensoren en actuatoren (ESP2)
Project 2 10
Projectopdracht
Projectvaardigheden workshop
32-bit Microcontroller workshop
Information Technology 2
Electrical Engineering Fundamentals 2 3

4. Literatuur
Han Scholar: ET-V12-ES 4

5. Aanschaffen: STM32F0DISCOVERY discovery development kit
Benodigde Materiaal
Aanschaffen: STM32F0DISCOVERY discovery development kit
Zie:
ARLE = Applied Reseach Lab Engineering 5 5

6. praktische opdrachten
Werkwijze
workshops
praktische opdrachten 6

7. Toetsing Productrapport 25 % Product 25 % Productpresentatie √
Printontwerp √
Professional Skills √
Integrale toets % 7

8. Onderwerpen Installation and verification of the SDE & GPIO
Voorjaarsvakantie
Ontwikkelweek
Architecture of the STM32F051x & USART
Standard Peripheral Driver Library
Timers/Counters & PWM
ADC/DAC
I2C
DMA 8

9. ST32F4 Pebble Time Smartwatch

10. Hoe dit onderdeel in elkaar zit Tooling GPIO
Vandaag
Hoe dit onderdeel in elkaar zit
Tooling
GPIO 10

11. Documents
STM32F05xxx Reference Manual ui/static/active/en/resource/technical/document/ref erence_manual/DM pdf
STM32F051R8 Datasheet 9/SS1574/LN7/PF251901 11

12. MDK-ARM Microcontroller Development Kit
Tools
MDK-ARM Microcontroller Development Kit
Download vanaf:
Installeer 12

13. Dit start automatisch de ‘Pack Installer’
Tools
Dit start automatisch de ‘Pack Installer’
Installeer ten minste Keil::STM32F0xx_DFP 13

14. Tools
Installeer de ST-LINK/V2 drivers vanaf: L1984/SC724/SS1677/PF251168 14

15. Example project Download example ZIP file from Scholar
Start μVision by double clicking the file blinky.uvprojx
Build the project by pressing F7 or
The Build Output should look like this:
Connect the STM32F0-Discovery board to your PC/laptop.
Program the microcontroller by pressing the load button or from the menu Flash -> Download

16. Example project
Troubles during installation or running the blinky project? See Scholar for additional information. 2. Ask your teacher.

17. Hoe dit onderdeel in elkaar zit Tooling GPIO
Vandaag
Hoe dit onderdeel in elkaar zit
Tooling
GPIO 17

18. General Purpose Input Output
GPIO
General Purpose Input Output
GPIOx-IDR
16-bits simultaneous
GPIOx-MODER
input, output, alternate function or analog
GPIOx-PUPDR
Pull-up, Pull-down, disabled
GPIOx-ODR
16-bits simultaneous
GPIOx-OTYPER
Push-pull, open-drain or disabled
GPIOx-BSRR
Individual Bit Set Reset

19. GPIO registers

20. GPIO registers

21. stm32f0xx.h typedef struct {
__IO uint32_t MODER; /* port mode register */
__IO uint16_t OTYPER; /* port output type register */
uint16_t RESERVED0;
__IO uint32_t OSPEEDR; /* port output speed register */
__IO uint32_t PUPDR; /* port pull-up/pull-down register */
__IO uint16_t IDR; /* port input data register */
uint16_t RESERVED1;
__IO uint16_t ODR; /* port output data register */
uint16_t RESERVED2;
__IO uint32_t BSRR; /* port bit set/reset registerBSRR */
__IO uint32_t LCKR; /* port configuration lock register */
__IO uint32_t AFR[2]; /* alternate function low register */
__IO uint16_t BRR; /* bit reset register */
uint16_t RESERVED3;
} GPIO_TypeDef;

22. CMSIS Compliant ! Code – Register access //in stm32f0xx.h
#define GPIOC ((GPIO_TypeDef *) GPIOC_BASE) //0x
//in your code:
GPIOC->ODR = 0x ;
-> : “indirect selection operator”
CMSIS Compliant !

23. Code - Set individual bits
#define RCC_AHBENR_GPIOCEN ((uint32_t)0x )
//set individual bit:
RCC->AHBENR |= RCC_AHBENR_GPIOCEN;
Register
Mask
register |= mask; ≡ register = register | mask;
Individual set: bitwise or
Example:
Register 0b
Mask 0b OR

24. Code – Clear individual bits
#define GPIO_OTYPER_OT_8 ((uint32_t)0x )
#define GPIO_OTYPER_OT_9 ((uint32_t)0x )
//clear individual bits:
GPIOC->OTYPER &= ~(GPIO_OTYPER_OT_8 | GPIO_OTYPER_OT_9);
Register
Mask
GPIO_OTYPER_OT_8 0b
GPIO_OTYPER_OT_9 0b OR
Mask 0b
Individual clear: bitwise and with bitwise inverse
Register 0b
~Mask 0b
AND
Register 0b

25. Code – Toggle individual bits
GPIOC->ODR ^= GPIO_ODR_0;
Register
Mask
Individual toggle: bitwise xor
Example:
Register 0b
Mask 0b
XOR
Register 0b

26. GPIO example #include "stm32f0xx.h" void delay(const int d);
int main(void) {
RCC->AHBENR |= RCC_AHBENR_GPIOCEN; //GPIOC Periph clock enable
GPIOC->MODER |= (GPIO_MODER_MODER8_0 | GPIO_MODER_MODER9_0); //PC8 and PC9 output
GPIOC->OTYPER &= ~(GPIO_OTYPER_OT_8 | GPIO_OTYPER_OT_9); //Push pull mode selected
  GPIOC->OSPEEDR |= (GPIO_OSPEEDER_OSPEEDR8 | GPIO_OSPEEDER_OSPEEDR9); //maximum speed
GPIOC->PUPDR &= ~(GPIO_PUPDR_PUPDR8 | GPIO_PUPDR_PUPDR9); //no pull-up or pull-down
while(1)
GPIOC->BSRR = GPIO_BSRR_BS_9; // Set PC9
GPIOC->BSRR = GPIO_BSRR_BR_8; // Set PC8
delay(SystemCoreClock/8); // delay 1 sec.
GPIOC->BSRR = GPIO_BSRR_BR_9; // Reset PC9
GPIOC->BSRR = GPIO_BSRR_BS_8; // Reset PC8 }

27. Assignment 1
Make the blue LED blink with ~ 2 Hz while the green LED blinks with ~10 Hz.

28. Assignment 2
So far we have seen how to use outputs. In a similar way inputs can be used. Adapt the project blinky.uvprojx so that:
when the blue USER Push button is not pressed, the blue LED blinks with a frequency of ~ 1 Hz.
when the blue USER Push button is pressed, the blue LED blinks with a frequency of ~ 10 Hz.
Tips:
The features of the STM32F0DISCOVERY board are described in the User Manual UM1525, which can be found on the STM32F0DISCOVERY website. In paragraph 4.9 is described which I/O pin is connected to the blue USER Push button.
Remember to also enable this I/O pin’s peripheral clock!

29. Assignment 3 Use a breadboard and connect eight LED’s to PC0 to PC7.
Implement a LED chaser that changes direction when pressing the blue USER Push button.