yjdwbj commented on issue #2276:
URL: https://github.com/apache/incubator-nuttx/issues/2276#issuecomment-725125177
Thank you @adamfeuer reply to me, I having a logic analyzer, and connected to the right PIOD interface.
And I enabled the sam_sendcmd output like below:
```sh
BD
initializing HSMCI
sam_hsmci_initialize: Initializing SDIO
sdio_initialize: slotno: 0
mmcsd_slotinitialize: minor: 0
mmcsd_hwinitialize: DMA supported: 1
mmcsd_hwinitialize: Attached MMC/SD interrupts
sam_registercallback: Register 0x413e65(0x200042e0)
sam_callbackenable: eventset: 02
sam_callback: Callback 0x413e65(0x200042e0) cbevents: 02 cdstatus: 00
sam_callback: No... return without performing the callback
mmcsd_slotinitialize: MMC/SD slot is empty
sam_cardinserted: Slot 0 inserted: YES
sdio_mediachange: cdstatus OLD: 00 NEW: 01
sam_callback: Callback 0x413e65(0x200042e0) cbevents: 02 cdstatus: 01
sam_callback: Callback to 0x413e65(0x200042e0)
mmcsd_mediachange: arg: 0x200042e0
mmcsd_probe: type: 0 probed: 0
mmcsd_removed: type: 0 present: 1
sam_sendcmd: cmd: 00000000 arg: 00000000 regval: 00000000
sam_sendcmd: cmd: 00000000 arg: 00000000 regval: 00000000
sam_sendcmd: cmd: 00008101 arg: 40200000 regval: 00001041
sam_waitresponse: ERROR: cmd: 00008101 events: 009b0001 SR: 0410c0e4
mmcsd_sendcmdpoll: ERROR: Wait for response to cmd: 00008101 failed: -116
mmcsd_cardidentify: ERROR: CMD1 RECVR3: -22
sam_sendcmd: cmd: 00000208 arg: 000001aa regval: 00001048
mmcsd_cardidentify: SD V2.x card
sam_sendcmd: cmd: 00000077 arg: 00000000 regval: 00001077
sam_sendcmd: cmd: 00000129 arg: 40100000 regval: 00001069
mmcsd_cardidentify: R3: 00ff8000
sam_sendcmd: cmd: 00000077 arg: 00000000 regval: 00001077
sam_sendcmd: cmd: 00000129 arg: 40100000 regval: 00001069
mmcsd_cardidentify: R3: c0ff8000
mmcsd_cardidentify: SD V2.x card with block addressing
sam_sendcmd: cmd: 000000c2 arg: 00000000 regval: 00001082
mmcsd_decode_cid: mid: 02 oid: 544d pnm: SA08G prv: 7 psn: 1107393314 mdt: c6 crc: 7e
sam_sendcmd: cmd: 000001c3 arg: 00000000 regval: 00001043
mmcsd_sdinitialize: RCA: 1234
sam_sendcmd: cmd: 0000004d arg: 12340000 regval: 0000104d
sam_sendcmd: cmd: 000000c9 arg: 12340000 regval: 00001089
mmcsd_decode_csd: CSD:
mmcsd_decode_csd: CSD_STRUCTURE: 1 SPEC_VERS: 0 (MMC)
mmcsd_decode_csd: TAAC {TIME_UNIT: 6 TIME_VALUE: 1} NSAC: 0
mmcsd_decode_csd: TRAN_SPEED {TRANSFER_RATE_UNIT: 2 TIME_VALUE: 6}
mmcsd_decode_csd: CCC: 1461
mmcsd_decode_csd: READ_BL_LEN: 9 READ_BL_PARTIAL: 0
mmcsd_decode_csd: WRITE_BLK_MISALIGN: 0 READ_BLK_MISALIGN: 0
mmcsd_decode_csd: DSR_IMP: 0
mmcsd_decode_csd: SD Block Addressing:
mmcsd_decode_csd: C_SIZE: 15199 SD_ER_BLK_EN: 1
mmcsd_decode_csd: SD_SECTOR_SIZE: 127 SD_WP_GRP_SIZE: 0
mmcsd_decode_csd: WP_GRP_EN: 0 MMC DFLT_ECC: 0 (MMC) R2W_FACTOR: 2
mmcsd_decode_csd: WRITE_BL_LEN: 9 WRITE_BL_PARTIAL: 0
mmcsd_decode_csd: FILE_FORMAT_GROUP: 0 COPY: 0
mmcsd_decode_csd: PERM_WRITE_PROTECT: 0 TMP_WRITE_PROTECT: 0
mmcsd_decode_csd: FILE_FORMAT: 0 ECC: 0 (MMC) CRC: 58
mmcsd_decode_csd: Capacity: 7782400Kb, Block size: 512b, nblocks: 15564800 wrprotect: 0
sam_sendcmd: cmd: 00000087 arg: 12340000 regval: 000010c7
sam_sendcmd: cmd: 00000050 arg: 00000008 regval: 00001050
sam_dmarecvsetup: SAM_HSMCI_MR = 0x00008702
sam_sendcmd: cmd: 00000077 arg: 12340000 regval: 00001077
sam_sendcmd: cmd: 00000473 arg: 00000000 regval: 00051073
mmsd_decode_scr: SCR:
mmsd_decode_scr: SCR_STRUCTURE: 0 SD_VERSION: 2
mmsd_decode_scr: DATA_STATE_AFTER_ERASE: 0 SD_SECURITY: 3 SD_BUS_WIDTHS: 5
mmsd_decode_scr: Manufacturing data: 00000001
sam_sendcmd: cmd: 00000077 arg: 12340000 regval: 00001077
sam_sendcmd: cmd: 0000006a arg: 00000000 regval: 0000106a
sam_sendcmd: cmd: 00000077 arg: 12340000 regval: 00001077
sam_sendcmd: cmd: 00000046 arg: 00000002 regval: 00001046
mmcsd_widebus: Wide bus operation selected
```
The CMD and CLK that it's looks like right.
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