<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[M5StickCPlus Card Mount Failed]]></title><description><![CDATA[<p dir="auto"><strong>Trying to connect SD Card Module via External SPI.  Keep getting Card Mount Failed.  Tried with both 3.3 and 5v external power.  Can someone please tell me what I'm doing wrong?</strong></p>
<p dir="auto">#include &lt;M5StickCPlus.h&gt;<br />
#include "SD.h"<br />
SPIClass SPI_EXT;<br />
// PIN配置<br />
enum { spi_sck = 0, spi_miso = 36, spi_mosi = 26, spi_ss = -1 };<br />
void setup()<br />
{<br />
// M5StickC initialize<br />
M5.begin();<br />
M5.Lcd.setRotation(3);<br />
// SPI initialize<br />
SPI_EXT.begin(spi_sck, spi_miso, spi_mosi, spi_ss);<br />
// SD initialize<br />
if (!SD.begin(spi_ss, SPI_EXT)) {<br />
M5.Lcd.println("Card Mount Failed");<br />
return;<br />
}<br />
// SD check<br />
uint8_t cardType = SD.cardType();<br />
if (cardType == CARD_NONE) {<br />
M5.Lcd.println("None SD Card");<br />
return;<br />
}<br />
M5.Lcd.print("SD Card Type: ");<br />
if (cardType == CARD_MMC) {<br />
M5.Lcd.println("MMC");<br />
} else if (cardType == CARD_SD) {<br />
M5.Lcd.println("SDSC");<br />
} else if (cardType == CARD_SDHC) {<br />
M5.Lcd.println("SDHC");<br />
} else {<br />
M5.Lcd.println("UNKNOWN");<br />
}<br />
// SD volume<br />
uint64_t cardSize = SD.cardSize() / (1024 * 1024);<br />
M5.Lcd.printf("SD Card Size: %lluMB\n", cardSize);<br />
}<br />
void loop() {<br />
}</p>
]]></description><link>https://community.m5stack.com/topic/6037/m5stickcplus-card-mount-failed</link><generator>RSS for Node</generator><lastBuildDate>Mon, 20 Apr 2026 09:36:11 GMT</lastBuildDate><atom:link href="https://community.m5stack.com/topic/6037.rss" rel="self" type="application/rss+xml"/><pubDate>Tue, 30 Jan 2024 23:43:19 GMT</pubDate><ttl>60</ttl></channel></rss>