[参考译文] AM6442：如果 SBL 介质为 EMMC、则如何在 EMMC 中加载 FreeRTOS FAT 文件系统

您好：

如果您使用的是 SBL_EMMC 引导加载程序、则需要应用以下补丁：

https://github.com/TexasInstruments/mcupsdk-core/commit/9ef14a519fd

例如、PFA 附加了补丁、以使 MMCSD_FILE_IO 示例可与 eMMC 配合使用：

diff --git a/examples/drivers/mmcsd/mmcsd_file_io/mmcsd_file_io.c b/examples/drivers/mmcsd/mmcsd_file_io/mmcsd_file_io.c
index 068d066..8f0bc51 100644
--- a/examples/drivers/mmcsd/mmcsd_file_io/mmcsd_file_io.c
+++ b/examples/drivers/mmcsd/mmcsd_file_io/mmcsd_file_io.c
@@ -60,7 +60,7 @@ void mmcsd_file_io_main(void *args)
      * Later when we give the pcName to the partition during mount, it has to match this. In this
      * case we give the mount point as /sd0. If it was FF_PARTITION_SD1, then /sd1.
      */
-    FF_Disk_t *pDisk = &gFFDisks[FF_PARTITION_SD0];
+    FF_Disk_t *pDisk = &gFFDisks[FF_PARTITION_EMMC0];
 
     FF_MMCSDGetPartitionDetails(pDisk, &partDetails);
 
@@ -71,7 +71,7 @@ void mmcsd_file_io_main(void *args)
 
         FF_MMCSDCreateAndFormatPartition(pDisk, sectorCount);
 
-        FF_MMCSDMountPartition(pDisk, "/sd0");
+        FF_MMCSDMountPartition(pDisk, "/emmc0");
 
         /* Check the sector count now */
         FF_MMCSDGetPartitionDetails(pDisk, &partDetails);
@@ -92,7 +92,7 @@ void mmcsd_file_io_main(void *args)
 
     FF_FILE *fp;
 
-    char fileName[] = "/sd0/file.dat";
+    char fileName[] = "/emmc0/file.dat";
     char fileData[] = "This is a test string. Hello, World!";
     char buf[100];
 

BR, Prashant

Unknown 说：

如果您使用的是 SBL_EMMC 引导加载程序、则需要应用以下补丁：

我看到此补丁可能无法正常工作、因为它位于 MCU+ SDK v09.02.01.05上。

请尝试以下补丁：

diff --git a/examples/drivers/boot/sbl_emmc/am64x-evm/r5fss0-0_nortos/main.c b/examples/drivers/boot/sbl_emmc/am64x-evm/r5fss0-0_nortos/main.c
index 53cae36..6203322 100644
--- a/examples/drivers/boot/sbl_emmc/am64x-evm/r5fss0-0_nortos/main.c
+++ b/examples/drivers/boot/sbl_emmc/am64x-evm/r5fss0-0_nortos/main.c
@@ -254,6 +254,10 @@ int main(void)
                 {
                     status = Bootloader_rprcImageLoad(bootHandle, &bootImageInfo.cpuInfo[CSL_CORE_ID_R5FSS0_0]);
                 }
+
+                /* Power of the MMCSD after loading the images, leave it in clean state for applications  */
+                SOC_moduleClockEnable(TISCI_DEV_MMCSD0, 0);
+
                 status = Bootloader_runSelfCpu(bootHandle, &bootImageInfo);
             }
             /* it should not return here, if it does, then there was some error */