GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOC, &GPIO_InitStructure); /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */ /*GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN; GPIO_InitStructure.GPIO_Mode = GPIO
< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */// 如果你想用SPI来操作SD卡? // GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; // GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; // GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStruc...
1 CD/DAT3 Card detect / Data line[bit3] 2 CMD Command/Response 3 VSS1 Supply voltage ground 4 VDD Supply voltage 5 CLK Clock 6 VSS2 Supply voltage ground 7 DAT0 Data line[bit0] 8 DAT1 Data line[bit1] 9 DAT2 Data line[bit2] SPI Mode 序号引脚功能 1 CS Chip Select(active low...
/** * @BRIEF DETECT IF SD CARD IS CORRECTLY PLUGGED IN THE MEMORY SLOT. * @PARAM NONE * @RETVAL RETURN IF SD IS DETECTED OR NOT */UINT8_T SD_DETECT(VOID){ __IO UINT8_T STATUS = SD_PRESENT; /*!< CHECK GPIO TO DETECT SD */ IF (GPIO_READINPUTDATABIT(SD_DETECT_GPIO_PORT, SD...
detect SDIO总线上是否存在card } void _mmc_detect_change(struct mmc_host *host, unsigned long delay, bool cd_irq) { host->detect_change = 1; mmc_schedule_delayed_work(&host->detect, delay); } 从中可以看出最终调用到的是在mmc_alloc_host中初始化的延迟工作队列host->detect,所以mmc_rescan函...
然后,有时候我们在设计 SD Card硬件接口时,不一定都加上 SD Card硬件检测功能(即是否接上 SD Card检测引脚),那么,我们就修改一下它的 SD Card库里的函数,对应的是 SD_Detect();函数,我们只需加个宏来作决定就好了,更改如下: uint8_t SD_Detect(void) ...
/*MMC drivers should call this when they detect a card has been inserted or removed.检测sd卡是否插上或移除*/ —->mmc_detect_change(host, 0); /*Schedule delayed work in the MMC work queue.调度延时工作队列*/ mmc_schedule_delayed_work(&host->detect, delay); ...
[ 4.167423] wifi_platform_bus_enumerate device present 1 [ 4.180247] === Card detection to detect SDIO card! === [ 4.192958] mmc2:mmc host rescan start!复制代码作者: cr7jj 时间: 2020-3-27 09:58cr7jj 发表于 2020-3-27 09:56 &sdio0 { clock-frequency ...
[ 4.180247] === Card detection to detect SDIO card! === [ 4.192958] mmc2:mmc host...
host->irq_cd=gpio_to_irq(host->pdata->gpio_detect); if(host->irq_cd>=0){ if(request_irq(host->irq_cd,s3cmci_irq_cd, IRQF_TRIGGER_RISING| IRQF_TRIGGER_FALLING, DRIVER_NAME,host)){ dev_err(&pdev->dev, "can't get card detect irq.\n"); ...