问题描述：
1、使用MCU：
STM32f103RE
2、开发环境：CubeIDE
3、固件版本：STM32Cube FW_F1 V1.8.04、硬件连接：4位共阴极数码管，GPIOA0~7通过100Ω电阻连接数码管7断码和DP位，GPIOC0~3连接NPN三极管基极控制数码管阴极接地实现位选；SPI2（GPIOB端口）连接W25Q64 Flash芯片。
5、问题概述：定时器
tiM2更新事件和定时器TIM2通道1比较输出事件，分别触发DMA1_Ch2向GPIOC，DMA1_Ch5向GPIOA，传输数据，驱动数码管动态扫描显示，并且正常工作。但，当运行MX_FATFS_Init()始化FatFs文件后，数码管显示异常，跟踪定位到函数FATFS_LinkDriverEx()中的【
disk.drv[disk.nbr] = drv;】，运行该句后数码管显示异常。
希望知道原因的大神不吝赐教，在此万分感谢！！！
主要实现代码如下：//DMA1通道5传输数据volatile uint32_t LDS_Buffer[8]={0x00ff00f0, 0x00ff0000, 0x00ff000f, 0x00ff0000, 0x00ff00f0, 0x00ff0000, 0x00ff000f, 0x00ff0000};
//DMA1通道2传输数据
volatile uint32_t SEG_Buffer[8]={0x000f0008, 0x000f0000, 0x000f0004, 0x000f0000, 0x000f0002, 0x000f0000, 0x000f0001, 0x000f0000};
int main(void)
{
HAL_Init();
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
W25QXX_Init();
MX_TIM2_Init();
HAL_DMA_Start( hdma_tim2_ch1, (uint32_t)LDS_Buffer, (uint32_t)( (GPIOA->BSRR)), 32);
HAL_DMA_Start( hdma_tim2_up, (uint32_t)SEG_Buffer, (uint32_t)( (GPIOC->BSRR)), 32);
__HAL_TIM_ENABLE_DMA( htim2, TIM_DMA_CC1|TIM_DMA_UPDATE);
HAL_TIM_Base_Start( htim2);
运行完以上代码，数码管正常显示
MX_FATFS_Init(); //运行完该函数，数码管显示异常
while (1)
{
}
}
代码跟踪：
- void MX_FATFS_Init(void)
- {
- /*## FatFS: Link the Flash driver ###########################*/
- retFlash = FATFS_LinkDriver( Flash_Driver, FlashPath);
- }
- uint8_t FATFS_LinkDriver(Diskio_drvTypeDef *drv, char *path)
- {
- return FATFS_LinkDriverEx(drv, path, 0);
- }
- uint8_t FATFS_LinkDriverEx(Diskio_drvTypeDef *drv, char *path, uint8_t lun)
- {
- uint8_t ret = 1;
- uint8_t DiskNum = 0;
- if(disk.nbr <= _VOLUMES)
- {
- disk.is_initialized[disk.nbr] = 0;
- disk.drv[disk.nbr] = drv; //跟踪至该句，运行该句后数码管显示异常
- disk.lun[disk.nbr] = lun;
- DiskNum = disk.nbr++;
- path[0] = DiskNum + '0';
- path[1] = ':';
- path[2] = '/';
- path[3] = 0;
- ret = 0;
- }
- return ret;
- }
复制代码
Flash驱动移植：
- Diskio_drvTypeDef Flash_Driver =
- {
- Flash_initialize,
- Flash_status,
- Flash_read,
- #if _USE_WRITE == 1
- Flash_write,
- #endif /* _USE_WRITE == 1 */
- #if _USE_IOCTL == 1
- Flash_ioctl,
- #endif /* _USE_IOCTL == 1 */
- };
- DSTATUS Flash_initialize(BYTE pdrv) /* Physical drive nmuber to identify the drive */
- {
- W25QXX_Init();
- return RES_OK;
- }
- DSTATUS Flash_status(BYTE pdrv) /* Physical drive nmuber to identify the drive */
- {
- /* USER CODE BEGIN STATUS */
- Stat = STA_NOINIT;
- Stat = RES_OK;
- return Stat;
- /* USER CODE END STATUS */
- }
- DRESULT Flash_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
- {
- if (!count)
- return RES_PARERR;
- for(;count>0;count--)
- {
- W25QXX_Read(buff,sector*FLASH_SECTOR_SIZE, FLASH_SECTOR_SIZE);
- sector++;
- buff+=FLASH_SECTOR_SIZE;
- }
- return RES_OK;
- }
- #if _USE_WRITE == 1
- DRESULT Flash_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
- {
- if (!count)
- {
- return RES_PARERR;
- }
- for(;count>0;count--)
- {
- W25QXX_Erase_Sector(sector);
- W25QXX_Write_NoCheck((uint8_t*)buff,sector*FLASH_SECTOR_SIZE,FLASH_SECTOR_SIZE);
- sector++;
- buff+=FLASH_SECTOR_SIZE;
- }
- return RES_OK;
- }
- #endif /* _USE_WRITE == 1 */
- #if _USE_IOCTL == 1
- DRESULT Flash_ioctl (BYTE pdrv, BYTE cmd, void *buff)
- {
- DRESULT res;
- switch(cmd)
- {
- case CTRL_SYNC:
- res = RES_OK;
- break;
- case GET_SECTOR_SIZE:
- *(WORD*)buff = FLASH_SECTOR_SIZE;
- res = RES_OK;
- break;
- case GET_BLOCK_SIZE:
- *(WORD*)buff = FLASH_BLOCK_SIZE;
- res = RES_OK;
- break;
- case GET_SECTOR_COUNT:
- *(DWORD*)buff = FLASH_SECTOR_COUNT;
- res = RES_OK;
- break;
- default:
- res = RES_PARERR;
- break;
- }
- return res;
- }
复制代码
外设初始化：
- void MX_TIM2_Init(void)
- {
- TIM_ClockConfigTypeDef sClockSourceConfig = {0};
- TIM_MasterConfigTypeDef sMasterConfig = {0};
- TIM_OC_InitTypeDef sConfigOC = {0};
- htim2.Instance = TIM2;
- htim2.Init.Prescaler = 7199;
- htim2.Init.CounterMode = TIM_COUNTERMODE_UP; //向上计数
- htim2.Init.Period = 5;
- htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
- htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; //自动重载
- if (HAL_TIM_Base_Init( htim2) != HAL_OK)
- {
- Error_Handler();
- }
- sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
- if (HAL_TIM_ConfigClockSource( htim2, sClockSourceConfig) != HAL_OK)
- {
- Error_Handler();
- }
- sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
- sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
- if (HAL_TIMEx_MasterConfigSynchronization( htim2, sMasterConfig) != HAL_OK)
- {
- Error_Handler();
- }
- sConfigOC.OCMode = TIM_OCMODE_TIMING;
- sConfigOC.Pulse = 5;
- sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
- sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
- if (HAL_TIM_OC_ConfigChannel( htim2, sConfigOC, TIM_CHANNEL_1) != HAL_OK)
- {
- Error_Handler();
- }
- }
- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
- {
- if(tim_baseHandle->Instance==TIM2)
- {
- /* TIM2 clock enable */
- __HAL_RCC_TIM2_CLK_ENABLE();
- /* TIM2 DMA Init */
- /* TIM2_UP Init */
- hdma_tim2_up.Instance = DMA1_Channel2;
- hdma_tim2_up.Init.Direction = DMA_MEMORY_TO_PERIPH;
- hdma_tim2_up.Init.PeriphInc = DMA_PINC_DISABLE;
- hdma_tim2_up.Init.MemInc = DMA_MINC_ENABLE;
- hdma_tim2_up.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; //WORD
- hdma_tim2_up.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
- hdma_tim2_up.Init.Mode = DMA_CIRCULAR;
- hdma_tim2_up.Init.Priority = DMA_PRIORITY_LOW;
- if (HAL_DMA_Init( hdma_tim2_up) != HAL_OK)
- {
- Error_Handler();
- }
- __HAL_LINKDMA(tim_baseHandle,hdma[TIM_DMA_ID_UPDATE],hdma_tim2_up);
- /* TIM2_CH1 Init */
- hdma_tim2_ch1.Instance = DMA1_Channel5;
- hdma_tim2_ch1.Init.Direction = DMA_MEMORY_TO_PERIPH;
- hdma_tim2_ch1.Init.PeriphInc = DMA_PINC_DISABLE;
- hdma_tim2_ch1.Init.MemInc = DMA_MINC_ENABLE;
- hdma_tim2_ch1.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
- hdma_tim2_ch1.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
- hdma_tim2_ch1.Init.Mode = DMA_CIRCULAR;
- hdma_tim2_ch1.Init.Priority = DMA_PRIORITY_LOW;
- if (HAL_DMA_Init( hdma_tim2_ch1) != HAL_OK)
- {
- Error_Handler();
- }
- __HAL_LINKDMA(tim_baseHandle,hdma[TIM_DMA_ID_CC1],hdma_tim2_ch1);
- }
- }
- void MX_DMA_Init(void)
- {
- /* DMA controller clock enable */
- __HAL_RCC_DMA1_CLK_ENABLE();
- }
- void W25QXX_Init(void)
- {
- // uint8_t temp = 0;
- GPIO_InitTypeDef GPIO_InitStruct = {0};
- __HAL_RCC_GPIOB_CLK_ENABLE();
- /**SPI2 GPIO Configuration
- PB12 ------> SPI2_CS
- PB13 ------> SPI2_SCK
- PB14 ------> SPI2_MISO
- PB15 ------> SPI2_MOSI
- */
- //PB12
- HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET);
- GPIO_InitStruct.Pin=GPIO_PIN_12; //PB12
- GPIO_InitStruct.Mode=GPIO_MODE_OUTPUT_PP; //推挽输出
- GPIO_InitStruct.Pull=GPIO_PULLUP; //上拉
- GPIO_InitStruct.Speed=GPIO_SPEED_FREQ_HIGH;//高速
- HAL_GPIO_Init(GPIOB, GPIO_InitStruct); //初始化
- hspi2.Instance = SPI2;
- hspi2.Init.Mode = SPI_MODE_MASTER; //设置SPI工作模式:设置为主SPI
- hspi2.Init.Direction = SPI_DIRECTION_2LINES;
- hspi2.Init.DataSize = SPI_DATASIZE_8BIT; //设置SPI的数据大小:SPI发送接收8位帧结构
- hspi2.Init.CLKPolarity = SPI_POLARITY_HIGH; //选择了串行时钟的稳态:时钟悬空高
- hspi2.Init.CLKPhase = SPI_PHASE_2EDGE; //数据捕获(采样)于第二个时钟沿
- hspi2.Init.NSS = SPI_NSS_SOFT;
- hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
- hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
- hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
- hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
- hspi2.Init.CRCPolynomial = 10; //CRC值计算的多项式
- if (HAL_SPI_Init( hspi2) != HAL_OK)
- {
- Error_Handler();
- }
- __HAL_SPI_ENABLE( hspi2); //使能SPI2
- SPI2_ReadWriteByte(0Xff); //启动传输
- }
举报
