Update SD_MMC.cpp (#4020)

cyberman54 · web-flow · commit 594ee6d249f7 · 2020-05-22T11:07:40.000+03:00
According to ESP-IDF API https://github.com/espressif/esp-idf/blob/dc14d027cec49260b78efb1c3724b1710f2f3ec0/docs/en/api-reference/peripherals/sdmmc_host.rst : "To configure the bus width, set the width field of :cpp:class:`sdmmc_slot_config_t`. For example, to set 1-line mode: sdmmc_slot_config_t slot = SDMMC_SLOT_CONFIG_DEFAULT(); slot.width = 1; "
diff --git a/libraries/SD_MMC/src/SD_MMC.cpp b/libraries/SD_MMC/src/SD_MMC.cpp
@@ -64,6 +64,7 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit)
 #endif
     if(mode1bit) {
         host.flags = SDMMC_HOST_FLAG_1BIT; //use 1-line SD mode
+	slot_config.width = 1;
     }
 
     esp_vfs_fat_sdmmc_mount_config_t mount_config = {

Original file line number	Diff line number	Diff line change
`@@ -64,6 +64,7 @@ bool SDMMCFS::begin(const char * mountpoint, bool mode1bit)`
`64`	`64`	`#endif`
`65`	`65`	`if(mode1bit) {`
`66`	`66`	`host.flags = SDMMC_HOST_FLAG_1BIT; //use 1-line SD mode`
	`67`	`+ slot_config.width = 1;`
`67`	`68`	`}`
`68`	`69`
`69`	`70`	`esp_vfs_fat_sdmmc_mount_config_t mount_config = {`