关于W5100读取SD卡问题
本帖最后由 greenfort 于 2012-8-26 00:00 编辑新入手一个W5100网络扩展卡，带有TF卡槽，但是发现无法使用系统库中的SD卡示例读写TF卡，请问哪位有示例程序，给一个我测试一下？
也试过Web读写SD卡的那个程序，无法工作，是不是板子是坏的
测试用的程序如下/*
* USERS OF ARDUINO 0023 AND EARLIER: use the 'SDWebBrowse.pde' sketch...
* 'SDWebBrowse.ino' can be ignored.
* USERS OF ARDUINO 1.0 AND LATER: **DELETE** the 'SDWebBrowse.pde' sketch
* and use ONLY the 'SDWebBrowse.ino' file.By default, BOTH files will
* load when using the Sketchbook menu, and the .pde version will cause
* compiler errors in 1.0.Delete the .pde, then load the sketch.
*
* I can't explain WHY this is necessary, but something among the various
* libraries here appears to be wreaking inexplicable havoc with the
* 'ARDUINO' definition, making the usual version test unusable (BOTH
* cases evaluate as true).FML.
*/
/*
* This sketch uses the microSD card slot on the Arduino Ethernet shield
* to serve up files over a very minimal browsing interface
*
* Some code is from Bill Greiman's SdFatLib examples, some is from the
* Arduino Ethernet WebServer example and the rest is from Limor Fried
* (Adafruit) so its probably under GPL
*
* Tutorial is at http://www.ladyada.net/learn/arduino/ethfiles.html
* Pull requests should go to http://github.com/adafruit/SDWebBrowse
*/
#include <SdFat.h>
#include <SdFatUtil.h>
#include <Ethernet.h>
#include <SPI.h>
/************ ETHERNET STUFF ************/
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 0, 11 };
EthernetServer server(80);
/************ SDCARD STUFF ************/
Sd2Card card;
SdVolume volume;
SdFile root;
SdFile file;
// store error strings in flash to save RAM
#define error(s) error_P(PSTR(s))
void error_P(const char* str) {
PgmPrint("error: ");
SerialPrintln_P(str);
if (card.errorCode()) {
PgmPrint("SD error: ");
Serial.print(card.errorCode(), HEX);
Serial.print(',');
Serial.println(card.errorData(), HEX);
}
while(1);
}
void setup() {
Serial.begin(9600);
PgmPrint("Free RAM: ");
Serial.println(FreeRam());
// initialize the SD card at SPI_HALF_SPEED to avoid bus errors with
// breadboards.use SPI_FULL_SPEED for better performance.
pinMode(10, OUTPUT); // set the SS pin as an output (necessary!)
digitalWrite(10, HIGH); // but turn off the W5100 chip!
if (!card.init(SPI_HALF_SPEED, 4)) error("card.init failed!");
// initialize a FAT volume
if (!volume.init(&card)) error("vol.init failed!");
PgmPrint("Volume is FAT");
Serial.println(volume.fatType(),DEC);
Serial.println();
if (!root.openRoot(&volume)) error("openRoot failed");
// list file in root with date and size
PgmPrintln("Files found in root:");
root.ls(LS_DATE | LS_SIZE);
Serial.println();
// Recursive list of all directories
PgmPrintln("Files found in all dirs:");
root.ls(LS_R);
Serial.println();
PgmPrintln("Done");
// Debugging complete, we start the server!
Ethernet.begin(mac, ip);
server.begin();
}
void ListFiles(EthernetClient client, uint8_t flags) {
// This code is just copied from SdFile.cpp in the SDFat library
// and tweaked to print to the client output in html!
dir_t p;
root.rewind();
client.println("<ul>");
while (root.readDir(p) > 0) {
// done if past last used entry
if (p.name == DIR_NAME_FREE) break;
// skip deleted entry and entries for . and..
if (p.name == DIR_NAME_DELETED || p.name == '.') continue;
// only list subdirectories and files
if (!DIR_IS_FILE_OR_SUBDIR(&p)) continue;
// print any indent spaces
client.print("<li><a href=\"");
for (uint8_t i = 0; i < 11; i++) {
if (p.name == ' ') continue;
if (i == 8) {
client.print('.');
}
client.print((char)p.name);
}
client.print("\">");
// print file name with possible blank fill
for (uint8_t i = 0; i < 11; i++) {
if (p.name == ' ') continue;
if (i == 8) {
client.print('.');
}
client.print((char)p.name);
}
client.print("</a>");
if (DIR_IS_SUBDIR(&p)) {
client.print('/');
}
// print modify date/time if requested
if (flags & LS_DATE) {
root.printFatDate(p.lastWriteDate);
client.print(' ');
root.printFatTime(p.lastWriteTime);
}
// print size if requested
if (!DIR_IS_SUBDIR(&p) && (flags & LS_SIZE)) {
client.print(' ');
client.print(p.fileSize);
}
client.println("</li>");
}
client.println("</ul>");
}
// How big our line buffer should be. 100 is plenty!
#define BUFSIZ 100
void loop()
{
char clientline;
int index = 0;
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean current_line_is_blank = true;
// reset the input buffer
index = 0;
while (client.connected()) {
if (client.available()) {
char c = client.read();
// If it isn't a new line, add the character to the buffer
if (c != '\n' && c != '\r') {
clientline = c;
index++;
// are we too big for the buffer? start tossing out data
if (index >= BUFSIZ)
index = BUFSIZ -1;
// continue to read more data!
continue;
}
// got a \n or \r new line, which means the string is done
clientline = 0;
// Print it out for debugging
Serial.println(clientline);
// Look for substring such as a request to get the root file
if (strstr(clientline, "GET / ") != 0) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
// print all the files, use a helper to keep it clean
client.println("<h2>Files:</h2>");
ListFiles(client, LS_SIZE);
} else if (strstr(clientline, "GET /") != 0) {
// this time no space after the /, so a sub-file!
char *filename;
filename = clientline + 5; // look after the "GET /" (5 chars)
// a little trick, look for the " HTTP/1.1" string and
// turn the first character of the substring into a 0 to clear it out.
(strstr(clientline, " HTTP")) = 0;
// print the file we want
Serial.println(filename);
if (! file.open(&root, filename, O_READ)) {
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
break;
}
Serial.println("Opened!");
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/plain");
client.println();
int16_t c;
while ((c = file.read()) > 0) {
// uncomment the serial to debug (slow!)
//Serial.print((char)c);
client.print((char)c);
}
file.close();
} else {
// everything else is a 404
client.println("HTTP/1.1 404 Not Found");
client.println("Content-Type: text/html");
client.println();
client.println("<h2>File Not Found!</h2>");
}
break;
}
}
// give the web browser time to receive the data
delay(1);
client.stop();
}
}Web页面打不开，串口提示错误如下
Free RAM: 810
error: card.init failed!
SD error: 1,0
同问，arduino接W5100后能否下载文件到SD卡？ 这个问题没人知道吗？
:'( w5100SD 和 网络不能同时用。 W5100和SD当然可以同时用，通过SS可以控制，请搜索坛子里的相关帖子和代码。（用w5100+sd做一个小的webserver，访问sd上的文件系统）。 本帖最后由 greenfort 于 2012-8-27 23:07 编辑
pinMode(10, OUTPUT); // set the SS pin as an output (necessary!)
digitalWrite(10, HIGH); // but turn off the W5100 chip!
uint8_t r = card.init(SPI_HALF_SPEED, 4);// Use digital 4 as the SD SS line
依然无效 这款扩展板并非所有的卡都支持，哪怕外观完全一样，我自己买了一块就不能用，最后把手机里的卡拔下来反而能认。建议你可以换卡试试。 这是个不错的问题:L arduino读写sd卡需要先将网络部分关闭，然后读写完SD卡再打开网络部分， 具体可以参考论坛“沧海笑”大神的帖子。。。。额虽然我忘了叫啥名字，，，，，搜索看看呗 请问楼主的这个库在哪里下载的，我下载了一个但是都是c++的 “沧海笑”大神的帖子是指这个吗？:P
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