catalogue
1, STM32cubeMX generates HAL library files
4, Keil virtual simulation logic instrument analyzes serial port waveform
5, Observe the waveform using the real logic instrument SaleaeLogic16
1, STM32cubeMX generates HAL library files
New project
Configure PC13 as the output to turn on the LED
Configure serial port
Modify RCC
Modify sys
Generate file
Put the following code into the while loop of main.c
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); HAL_Delay(500); HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); HAL_Delay(500);
2, Transplant μ COS
Download from the official website: http://micrium.com/downloadcenter/
Or link: https://pan.baidu.com/s/10RqsDRecbmVteWmDv2oUNQ
Extraction code: 1234
Copy the files in the red box to the created project MDK-ARM folder
Add file to project
Click Project - > Manage - > project items
Create a new folder
Add the following files to the new CPU folder
Add the following files to the new LIB file
Add the following files to the PORT file
Add the following files to the SOURCE file
Add the following files to the config file
Add the following files to the BSP file
Click OK after adding
In options of target, click C/C + + include path Import file path
After importing the following files, click OK
Add code to bsp.c and bsp.h under BSP directory
bsp.h
// bsp.h #ifndef __BSP_H__ #define __BSP_H__ #include "stm32f1xx_hal.h" void BSP_Init(void); #endif
bsp.c
// bsp.c
#include "includes.h"
#define DWT_CR *(CPU_REG32 *)0xE0001000
#define DWT_CYCCNT *(CPU_REG32 *)0xE0001004
#define DEM_CR *(CPU_REG32 *)0xE000EDFC
#define DBGMCU_CR *(CPU_REG32 *)0xE0042004
#define DEM_CR_TRCENA (1 << 24)
#define DWT_CR_CYCCNTENA (1 << 0)
CPU_INT32U BSP_CPU_ClkFreq (void)
{
return HAL_RCC_GetHCLKFreq();
}
void BSP_Tick_Init(void)
{
CPU_INT32U cpu_clk_freq;
CPU_INT32U cnts;
cpu_clk_freq = BSP_CPU_ClkFreq();
#if(OS_VERSION>=3000u)
cnts = cpu_clk_freq/(CPU_INT32U)OSCfg_TickRate_Hz;
#else
cnts = cpu_clk_freq/(CPU_INT32U)OS_TICKS_PER_SEC;
#endif
OS_CPU_SysTickInit(cnts);
}
void BSP_Init(void)
{
BSP_Tick_Init();
MX_GPIO_Init();
}
#if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
void CPU_TS_TmrInit (void)
{
CPU_INT32U cpu_clk_freq_hz;
DEM_CR |= (CPU_INT32U)DEM_CR_TRCENA; /* Enable Cortex-M3's DWT CYCCNT reg. */
DWT_CYCCNT = (CPU_INT32U)0u;
DWT_CR |= (CPU_INT32U)DWT_CR_CYCCNTENA;
cpu_clk_freq_hz = BSP_CPU_ClkFreq();
CPU_TS_TmrFreqSet(cpu_clk_freq_hz);
}
#endif
#if (CPU_CFG_TS_TMR_EN == DEF_ENABLED)
CPU_TS_TMR CPU_TS_TmrRd (void)
{
return ((CPU_TS_TMR)DWT_CYCCNT);
}
#endif
#if (CPU_CFG_TS_32_EN == DEF_ENABLED)
CPU_INT64U CPU_TS32_to_uSec (CPU_TS32 ts_cnts)
{
CPU_INT64U ts_us;
CPU_INT64U fclk_freq;
fclk_freq = BSP_CPU_ClkFreq();
ts_us = ts_cnts / (fclk_freq / DEF_TIME_NBR_uS_PER_SEC);
return (ts_us);
}
#endif
#if (CPU_CFG_TS_64_EN == DEF_ENABLED)
CPU_INT64U CPU_TS64_to_uSec (CPU_TS64 ts_cnts)
{
CPU_INT64U ts_us;
CPU_INT64U fclk_freq;
fclk_freq = BSP_CPU_ClkFreq();
ts_us = ts_cnts / (fclk_freq / DEF_TIME_NBR_uS_PER_SEC);
return (ts_us);
}
#endif
Modify the main.c file code
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "gpio.h"
#include "usart.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <includes.h>
#include "stm32f1xx_hal.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* Task priority */
#define START_TASK_PRIO 3
#define LED0_TASK_PRIO 4
#define MSG_TASK_PRIO 5
#define LED1_TASK_PRIO 6
/* Task stack size */
#define START_STK_SIZE 96
#define LED0_STK_SIZE 64
#define MSG_STK_SIZE 64
#define LED1_STK_SIZE 64
/* Task stack */
CPU_STK START_TASK_STK[START_STK_SIZE];
CPU_STK LED0_TASK_STK[LED0_STK_SIZE];
CPU_STK MSG_TASK_STK[MSG_STK_SIZE];
CPU_STK LED1_TASK_STK[LED1_STK_SIZE];
/* Task control block */
OS_TCB StartTaskTCB;
OS_TCB Led0TaskTCB;
OS_TCB MsgTaskTCB;
OS_TCB Led1TaskTCB;
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* Task function definition */
void start_task(void *p_arg);
static void AppTaskCreate(void);
static void AppObjCreate(void);
static void led_pc13(void *p_arg);
static void send_msg(void *p_arg);
static void led_pa3(void *p_arg);
/* 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 */
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
OS_ERR err;
OSInit(&err);
HAL_Init();
SystemClock_Config();
//MX_GPIO_Init(); This will also be initialized in BSP initialization
MX_USART1_UART_Init();
/* Create task */
OSTaskCreate((OS_TCB *)&StartTaskTCB, /* Create the start task */
(CPU_CHAR *)"start task",
(OS_TASK_PTR ) start_task,
(void *) 0,
(OS_PRIO ) START_TASK_PRIO,
(CPU_STK *)&START_TASK_STK[0],
(CPU_STK_SIZE) START_STK_SIZE/10,
(CPU_STK_SIZE) START_STK_SIZE,
(OS_MSG_QTY ) 0,
(OS_TICK ) 0,
(void *) 0,
(OS_OPT )(OS_OPT_TASK_STK_CHK | OS_OPT_TASK_STK_CLR),
(OS_ERR *)&err);
/* Start the multitasking system and give control to uC/OS-III */
OSStart(&err); /* Start multitasking (i.e. give control to uC/OS-III). */
}
void start_task(void *p_arg)
{
OS_ERR err;
CPU_SR_ALLOC();
p_arg = p_arg;
/* YangJie add 2021.05.20*/
BSP_Init(); /* Initialize BSP functions */
//CPU_Init();
//Mem_Init(); /* Initialize Memory Management Module */
#if OS_CFG_STAT_TASK_EN > 0u
OSStatTaskCPUUsageInit(&err); //Statistical tasks
#endif
#ifdef CPU_CFG_INT_DIS_MEAS_EN // If enabled, measure the interrupt off time
CPU_IntDisMeasMaxCurReset();
#endif
#if OS_CFG_SCHED_ROUND_ROBIN_EN // When using time slice rotation
//Enable the time slice rotation scheduling function. The time slice length is 1 system clock beat, i.e. 1*5=5ms
OSSchedRoundRobinCfg(DEF_ENABLED,1,&err);
#endif
OS_CRITICAL_ENTER(); //Enter critical zone
/* Create LED0 task */
OSTaskCreate((OS_TCB * )&Led0TaskTCB,
(CPU_CHAR * )"led_pc13",
(OS_TASK_PTR )led_pc13,
(void * )0,
(OS_PRIO )LED0_TASK_PRIO,
(CPU_STK * )&LED0_TASK_STK[0],
(CPU_STK_SIZE)LED0_STK_SIZE/10,
(CPU_STK_SIZE)LED0_STK_SIZE,
(OS_MSG_QTY )0,
(OS_TICK )0,
(void * )0,
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
(OS_ERR * )&err);
/* Create LED1 task */
OSTaskCreate((OS_TCB * )&Led1TaskTCB,
(CPU_CHAR * )"led_pa3",
(OS_TASK_PTR )led_pa3,
(void * )0,
(OS_PRIO )LED1_TASK_PRIO,
(CPU_STK * )&LED1_TASK_STK[0],
(CPU_STK_SIZE)LED1_STK_SIZE/10,
(CPU_STK_SIZE)LED1_STK_SIZE,
(OS_MSG_QTY )0,
(OS_TICK )0,
(void * )0,
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
(OS_ERR * )&err);
/* Create MSG task */
OSTaskCreate((OS_TCB * )&MsgTaskTCB,
(CPU_CHAR * )"send_msg",
(OS_TASK_PTR )send_msg,
(void * )0,
(OS_PRIO )MSG_TASK_PRIO,
(CPU_STK * )&MSG_TASK_STK[0],
(CPU_STK_SIZE)MSG_STK_SIZE/10,
(CPU_STK_SIZE)MSG_STK_SIZE,
(OS_MSG_QTY )0,
(OS_TICK )0,
(void * )0,
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
(OS_ERR * )&err);
OS_TaskSuspend((OS_TCB*)&StartTaskTCB,&err); //Suspend start task
OS_CRITICAL_EXIT(); //Enter critical zone
}
/**
* Function function: start the task function body.
* Input parameter: p_arg is the formal parameter passed when the task was created
* Return value: None
* Description: None
*/
static void led_pc13 (void *p_arg)
{
OS_ERR err;
(void)p_arg;
BSP_Init(); /* Initialize BSP functions */
CPU_Init();
Mem_Init(); /* Initialize Memory Management Module */
#if OS_CFG_STAT_TASK_EN > 0u
OSStatTaskCPUUsageInit(&err); /* Compute CPU capacity with no task running */
#endif
CPU_IntDisMeasMaxCurReset();
AppTaskCreate(); /* Create Application Tasks */
AppObjCreate(); /* Create Application Objects */
while (DEF_TRUE)
{
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_RESET);
OSTimeDlyHMSM(0, 0, 1, 0,OS_OPT_TIME_HMSM_STRICT,&err);
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_SET);
OSTimeDlyHMSM(0, 0, 1, 0,OS_OPT_TIME_HMSM_STRICT,&err);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
static void led_pa3 (void *p_arg)
{
OS_ERR err;
(void)p_arg;
BSP_Init(); /* Initialize BSP functions */
CPU_Init();
Mem_Init(); /* Initialize Memory Management Module */
#if OS_CFG_STAT_TASK_EN > 0u
OSStatTaskCPUUsageInit(&err); /* Compute CPU capacity with no task running */
#endif
CPU_IntDisMeasMaxCurReset();
AppTaskCreate(); /* Create Application Tasks */
AppObjCreate(); /* Create Application Objects */
while (DEF_TRUE)
{
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_3,GPIO_PIN_RESET);
OSTimeDlyHMSM(0, 0, 3, 0,OS_OPT_TIME_HMSM_STRICT,&err);
HAL_GPIO_WritePin(GPIOA,GPIO_PIN_3,GPIO_PIN_SET);
OSTimeDlyHMSM(0, 0, 3, 0,OS_OPT_TIME_HMSM_STRICT,&err);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
static void send_msg (void *p_arg)
{
OS_ERR err;
(void)p_arg;
BSP_Init(); /* Initialize BSP functions */
CPU_Init();
Mem_Init(); /* Initialize Memory Management Module */
#if OS_CFG_STAT_TASK_EN > 0u
OSStatTaskCPUUsageInit(&err); /* Compute CPU capacity with no task running */
#endif
CPU_IntDisMeasMaxCurReset();
AppTaskCreate(); /* Create Application Tasks */
AppObjCreate(); /* Create Application Objects */
while (DEF_TRUE)
{
printf("hello uc/OS!Welcome to RTOS Multitasking environment! \r\n");
OSTimeDlyHMSM(0, 0, 2, 0,OS_OPT_TIME_HMSM_STRICT,&err);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/* USER CODE BEGIN 4 */
/**
* Function function: create application task
* Input parameter: p_arg is the formal parameter passed when the task was created
* Return value: None
* Description: None
*/
static void AppTaskCreate (void)
{
}
/**
* Function function: uCOSIII kernel object creation
* Input parameters: None
* Return value: None
* Description: None
*/
static void AppObjCreate (void)
{
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
The startup file was found
Place pendsv at_ Handler and systick_ Change handler to OS_CPU_PendSVHandler and OS_CPU_SysTickHandler
Place pendsv at_ Handler and systick_ Change handler to OS_CPU_PendSVHandler and OS_CPU_SysTickHandler
Modify file app_cfg.h
# define APP_CFG_SERIAL_EN DEF_ENABLED Change to # define APP_CFG_SERIAL_EN DEF_DISABLED
#define APP_TRACE BSP_Ser_Printf Change to # define APP_TRACE (void)
Modify the file includes.h
stay # include <bsp.h> Add after: #include "gpio.h" # include "app_cfg.h"
take # include <stm32f10x_ lib.h> Change to # include "stm32f1xx_hal.h"
Modify file lib_cfg.h
#define LIB_MEM_CFG_HEAP_SIZE 5u * 1024u Change to 5 (the macro definition here sets the size of heap space. The RAM of STM32F103C8T6 is only 20K, so it should be reduced a little)
Modify the file usart.c
Add the following code to the usart.c file to complete the printf redirection
/* USER CODE BEGIN 1 */
typedef struct __FILE FILE;
int fputc(int ch,FILE *f){
HAL_UART_Transmit(&huart1,(uint8_t *)&ch,1,0xffff);
return ch;
}
/* USER CODE END 1 */
MX in gpio.c_ GPIO_ Init to modify
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_RESET);
/*Configure GPIO pin : PC13|PA3 */
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
Modify parameter configuration
3, Results
4, Keil virtual simulation logic instrument analyzes serial port waveform
Create a new text file under the project file MDK and change the file suffix to. ini
Enter the following code
map 0x40000000, 0x40007FFF read write // APB1 map 0x40010000, 0x400157FF read write // APB2 map 0x40020000, 0x4007FFFF read write // AHB1 map 0x50000000, 0x50060BFF read write // AHB2 map 0x60000000, 0x60000FFF read write // AHB3 map 0xE0000000, 0xE00FFFFF read write // CORTEX-M4 internal peripherals
Change Debug settings
Select Logic Analyzer
Click the Setup option, as shown in the figure below, and enter the following contents
The waveform is as follows
5, Observe the waveform using the real logic instrument SaleaeLogic16
The waveform is as follows
The waveforms from top to bottom are PC13, PA3 and USART1. It can be observed that the periods are 1s, 2.996s and 1.996s, that is, close to 1s, 3s and 2s, which basically conforms to the code
Observe the serial port carefully
During data transmission of serial communication protocol, each character is 10 bits (1 start bit, 7 data bits, 1 check bit and 1 end bit):
Start bit - first send a logical "0" signal to indicate the beginning of the transmitted character;
Data bit - can be 5 ~ 8 bits, logical "0" or "1";
Check bit - after adding this bit to the data bit, the number of bits of "1" should be even (even check) or odd (odd check);
Stop bit - it is the end flag of a character data. It can be 1-bit, 1.5-bit and 2-bit high level;
Idle bit - in logic "1" state, indicating that there is no data transmission on the current line.
It can be observed that the code corresponding to h is 01101000
6, References
Porting RTOS to STM32F103C8T6_pink_lemon's blog - CSDN blog
keil simulation debugging and SaleaeLogic16 logic instrument are used to observe the waveform of uC/OS-III multi task system signal_ Blog of L-GRAZY - CSDN blogstm32f103c8t6 porting uC/OS-III based on HAL Library_ Blog with small wooden strips of Mars - CSDN blog_ stm32f103c8t6 transplantation lwipSTM32F103C8T6 porting uCOS based on HAL Library_ Witty orange blog - CSDN blog