__HAL_TIM_SetCompare(&htim5, TIM_CHANNEL_2,100);//即TIM5,第二个通道的比较值改为100, 通过修改比较值修改占空比 也可以使用寄存器修改,同样很方便: TIM5->CCR2 =100; 9.获取当前毫秒数 #include"stm32fxxx_hal.h"intmain(void){HAL_Init();while(1) {uint32_tcurrentTick =HAL_GetTick();//...
HAL_GetTick返回uwTick的值,在进入HAL_Delay函数时,先记录当前 uwTick 的值,并标记为tickstart,然后不断在循环中读取uwTick 的当前值,再与记录的tickstart进行减运算,当(HAL_GetTick() - tickstart)的差值等于或大于wait的时候,跳出空循环,此时(HAL_GetTick() - tickstart)得出的差值就是延时的毫秒数。
1 HAL_StatusTypeDef HAL_RCC_DeInit(void) 2 { 3 uint32_t tickstart; 4 5 /* 将HSION位置1,使能HSI振荡器 */ 6 SET_BIT(RCC->OCENSETR, RCC_OCENSETR_HSION); 7 8 /* 获取全局变量uwTick当前计算值 */ 9 tickstart = HAL_GetTick(); 10 11 /* 等待HSI准备就绪 */ 12 while ((RCC->OC...
uint32_t tickstart = HAL_GetTick(); uint32_t wait = Delay; /* Add a freq to guarantee minimum wait */ if (wait < HAL_MAX_DELAY) { wait += (uint32_t)(uwTickFreq); } while ((HAL_GetTick() - tickstart) < wait) { } } (3)程序说明 函数是一个弱定义函数,可以重新被定义。
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma) { uint32_t registerValue = 0U; uint32_t tickstart = HAL_GetTick(); DMA_Base_Registers *regs = NULL; /* 省略 */ /* DMA1或者DMA2的初始化 */ if(IS_D2_DMA_INSTANCE(hdma) != RESET) { /* 省略 */ } /* BDMA的初始 */...
lTimeout函数里,原因是I2C_WaitOnFlagUntilTimeout函数里有这样一句if (((HAL_GetTick() - Tickstart) > Timeout) || (Timeout == 0U)),如下图所示:而调用HAL_GetTick函数返回值是uwTick,而 0 关于使用rtt操作系统后hal库iic读写的问题.pdf 283.22 KB , 下载次数: 8 ...
HAL_InitTick用于配置SysTick的重装载数值寄存器的值,其通过层层调用HAL_SYSTICK_Config函数和SysTick_Config函数完成SysTick的配置,此函数声明如下: __weak HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) 1. 函数描述:用于初始化SysTick,配置SysTick的重装载数值寄存器的值。 ...
tickstart = HAL_GetTick(); while((HAL_SD_GetCardState(hsd) != HAL_SD_CARD_TRANSFER)) { if((HAL_GetTick()-tickstart) >= SDMMC_DATATIMEOUT) { hsd->ErrorCode = HAL_SD_ERROR_TIMEOUT; hsd->State= HAL_SD_STATE_READY; return HAL_TIMEOUT; ...
HAL_StatusTypeDef HAL_SD_ReadBlocks(SD_HandleTypeDef *hsd, uint8_t *pData, uint32_t BlockAdd, uint32_t NumberOfBlocks, uint32_t Timeout) { SDMMC_DataInitTypeDef config; uint32_t errorstate; uint32_t tickstart = HAL_GetTick(); uint32_t count, data, dataremaining; uint32_t add =...
HAL_StatusTypeDef HAL_MDMA_Init(MDMA_HandleTypeDef *hmdma) { uint32_t tickstart = HAL_GetTick(); /* 检测句柄是否有效 */ if(hmdma == NULL) { return HAL_ERROR; } /* 检测参数 */ assert_param(IS_MDMA_STREAM_ALL_INSTANCE(hmdma->Instance)); assert_param(IS_MDMA_PRIORITY(hmdma->Init...