1. GPIO registers in STM32 MCUS are managed with below C struct, whose references are used to point to real peripheral address. typedef struct { volatile uint32_t MODER; volatile uint32_t IDR; volatile uint32_t ODR; } GPIO_TypeDef; The below code is written for STM32F4 GPIO registers. Explain the C code line by line. Also express what this code does. Assume that the code is executed after resetting. #include "main.h" GPIO_TypeDef *GPIOC = 0x 0x4002 0800; GPIO_TypeDef *GPIOD = 0x 0x4002 0C00; int main (){ GPIOC->MODER |= 0x0000 0000; GPIOD-> MODER |= 0x5555 5555; if (GPIOC->IDR >0x0000&& GPIOC->IDR <0x0100) { GPIOD->ODR=0×00FF; } if (GPIOC->IDR >0×00FF&& GPIOC->IDR <0×FFFF) { GPIOD->ODR=0XFF00; }
1. GPIO registers in STM32 MCUS are managed with below C struct, whose references are used to point to real peripheral address. typedef struct { volatile uint32_t MODER; volatile uint32_t IDR; volatile uint32_t ODR; } GPIO_TypeDef; The below code is written for STM32F4 GPIO registers. Explain the C code line by line. Also express what this code does. Assume that the code is executed after resetting. #include "main.h" GPIO_TypeDef *GPIOC = 0x 0x4002 0800; GPIO_TypeDef *GPIOD = 0x 0x4002 0C00; int main (){ GPIOC->MODER |= 0x0000 0000; GPIOD-> MODER |= 0x5555 5555; if (GPIOC->IDR >0x0000&& GPIOC->IDR <0x0100) { GPIOD->ODR=0×00FF; } if (GPIOC->IDR >0×00FF&& GPIOC->IDR <0×FFFF) { GPIOD->ODR=0XFF00; }
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Transcribed Image Text:1. GPIO registers in STM32 MCUS are managed with below C struct, whose references are used to
point to real peripheral address.
typedef struct {
volatile uint32_t MODER;
volatile uint32_t IDR;
volatile uint32_t ODR;
} GPIO_TypeDef;
The below code is written for STM32F4 GPIO registers. Explain the C code line by line. Also express
what this code does. Assume that the code is executed after resetting.
#include "main.h"
GPIO_TypeDef *GPIOC = 0x 0x4002 0800;
GPIO_TypeDef *GPIOD = 0x 0x4002 0OC00;
int main () {
GPIOC->MODER |= 0x0000 0000;
GPIOD-> MODER |= 0x5555 5555;
if (GPIOC->IDR >0x0000&& GPIOC->IDR <0x0100)
{
GPIOD->ODR=0×00FF;
if (GPIOC->IDR >0×00FF&& GPIOC->IDR <0XFFFF)
{
GPIOD->ODR=0XFF00;
}
...
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