Una gestión de memoria
- memoria dinámica
contorno
módulo de gestión de memoria dinámica que proporciona un mecanismo para el sistema de gestión de memoria dinámica para aplicación de usuario soporte dinámico, la liberación de bloque de memoria de longitud variable.
API para explicar
Ejemplo de programación
1, en tos_config.h, la memoria dinámica está configurado interruptor de montaje TOS_CFG_MMHEAP_EN:
#define TOS_CFG_MMHEAP_EN 1u
2, en tos_config.h, dinámico Configurar tamaño de la agrupación de memoria:
#define TOS_CFG_MMHEAP_POOL_SIZE 0x2000
3, la preparación de la main.c código de ejemplo:
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "cmsis_os.h"
#include "stdio.h"
#include "tos_k.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define STK_SIZE_TASK_DEMO 512
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
k_stack_t stack_task_demo[STK_SIZE_TASK_DEMO];
k_task_t task_demo;
extern void entry_task_demo(void *arg);
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
void entry_task_demo(void *arg)
{
void *p = K_NULL, *p_aligned = K_NULL;
int i = 0;
while (K_TRUE) {
if (i == 1) {
p = tos_mmheap_alloc(0x30);
if (p) {
printf("alloc: %x\n", (cpu_addr_t)p);
}
} else if (i == 2) {
if (p) {
printf("free: %x\n", p);
tos_mmheap_free(p);
}
} else if (i == 3) {
p = tos_mmheap_alloc(0x30);
if (p) {
printf("alloc: %x\n", (cpu_addr_t)p);
}
} else if (i == 4) {
p_aligned = tos_mmheap_aligned_alloc(0x50, 16);
if (p_aligned) {
printf("aligned alloc: %x\n", (cpu_addr_t)p_aligned);
if ((cpu_addr_t)p_aligned % 16 == 0) {
printf("%x is 16 aligned\n", (cpu_addr_t)p_aligned);
} else {
printf("should not happen\n");
}
}
} else if (i == 5) {
p = tos_mmheap_realloc(p, 0x40);
if (p) {
printf("realloc: %x\n", (cpu_addr_t)p);
}
} else if (i == 6) {
if (p) {
tos_mmheap_free(p);
}
if (p_aligned) {
tos_mmheap_free(p_aligned);
}
}
tos_task_delay(1000);
++i;
}
}
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
tos_knl_init();
(void)tos_task_create(&task_demo, "receiver_higher_prio", entry_task_demo, NULL,
4, stack_task_demo, STK_SIZE_TASK_DEMO, 0);
tos_knl_start();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}4, los resultados operativos:
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