# SPI操作SDCARD

## 概述

该实例工程展示了使用SPI接口读写SD卡。

## 硬件设置
- [SPI引脚](lab_board_app_spi_pin)根据板子型号查看具体信息
- SPI引脚对应好SD卡(模块)引脚

## 运行现象

- 确认硬件无误后，工程正确运行后，串口终端会输出如下信息：
```console

[spi_sdcard] SPI CLK frequency:400000 Hz
[spi_sdcard] SPI CLK frequency:40000000 Hz
SD Card initialization succeeded
Card Info:
-----------------------------------------------
Card Size in GBytes:    14.84GB
Block count: 31116288 block
Block Size: 512 Bytes

-----------------------------------------------
sdcard wiite/read verify ....
sd block_31116268 write PASSED
sd block_31116268 read PASSED
SD write-read-verify block 0x01dacbec PASSED
sd block_31116269 write PASSED
sd block_31116269 read PASSED
SD write-read-verify block 0x01dacbed PASSED
sd block_31116270 write PASSED
sd block_31116270 read PASSED
SD write-read-verify block 0x01dacbee PASSED
sd block_31116271 write PASSED
sd block_31116271 read PASSED
SD write-read-verify block 0x01dacbef PASSED
sd block_31116272 write PASSED
sd block_31116272 read PASSED
SD write-read-verify block 0x01dacbf0 PASSED
sd block_31116273 write PASSED
sd block_31116273 read PASSED
SD write-read-verify block 0x01dacbf1 PASSED
sd block_31116274 write PASSED
sd block_31116274 read PASSED
SD write-read-verify block 0x01dacbf2 PASSED
sd block_31116275 write PASSED
sd block_31116275 read PASSED
SD write-read-verify block 0x01dacbf3 PASSED
sd block_31116276 write PASSED
sd block_31116276 read PASSED
SD write-read-verify block 0x01dacbf4 PASSED
sd block_31116277 write PASSED
sd block_31116277 read PASSED
SD write-read-verify block 0x01dacbf5 PASSED
sd block_31116278 write PASSED
sd block_31116278 read PASSED
SD write-read-verify block 0x01dacbf6 PASSED
sd block_31116279 write PASSED
sd block_31116279 read PASSED
SD write-read-verify block 0x01dacbf7 PASSED
sd block_31116280 write PASSED
sd block_31116280 read PASSED
SD write-read-verify block 0x01dacbf8 PASSED
sd block_31116281 write PASSED
sd block_31116281 read PASSED
SD write-read-verify block 0x01dacbf9 PASSED
sd block_31116282 write PASSED
sd block_31116282 read PASSED
SD write-read-verify block 0x01dacbfa PASSED
sd block_31116283 write PASSED
sd block_31116283 read PASSED
SD write-read-verify block 0x01dacbfb PASSED
sd block_31116284 write PASSED
sd block_31116284 read PASSED
SD write-read-verify block 0x01dacbfc PASSED
sd block_31116285 write PASSED
sd block_31116285 read PASSED
SD write-read-verify block 0x01dacbfd PASSED
sd block_31116286 write PASSED
sd block_31116286 read PASSED
SD write-read-verify block 0x01dacbfe PASSED

SD write-read-verify reach the total count:19  PASSED!!!!

sdcard wiite/read speed test....
SD write-read-verify block range 0x01dacbec-0x01dacbff PASSED
Write Speed: 2532.18KB/s, Read Speed: 3021.68KB/s
Test completed, PASSED


```