嵌入式- SD卡- SPI -C - codevision AVR -在SD卡中创建和编写文件

I have an SD card (or SDHC card) connected to a micro controller via SPI mode. I am using Chan’s FAT library. In this I used CodevisionAVR v2.05.3 example code from help. By using this I read a text document and opened the file using open existing. I have an SD card (or SDHC card) connected to a