From f37c64ee5b640ef9c2e295db792c34c9f1f8369f Mon Sep 17 00:00:00 2001
From: GMagician <GMagician@users.noreply.github.com>
Date: Sat, 13 Jan 2018 08:53:12 +0100
Subject: [PATCH] Fix unsupported CMD59
It seems that some SD cards don't support CRC_ON_OFF command. This fix will permit to use also these cards but leaving CRC check active on the system
---
Marlin/src/sd/Sd2Card.cpp | 9 ++++-----
Marlin/src/sd/Sd2Card.h | 2 +-
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/Marlin/src/sd/Sd2Card.cpp b/Marlin/src/sd/Sd2Card.cpp
index 4392c06b28..adecc8e61c 100644
--- a/Marlin/src/sd/Sd2Card.cpp
+++ b/Marlin/src/sd/Sd2Card.cpp
@@ -41,6 +41,8 @@
#include "../Marlin.h"
#if ENABLED(SD_CHECK_AND_RETRY)
+ static bool crcSupported = true;
+
#ifdef FAST_CRC
static const uint8_t crctab7[] PROGMEM = {
0x00,0x09,0x12,0x1b,0x24,0x2d,0x36,0x3f,0x48,0x41,0x5a,0x53,0x6c,0x65,0x7e,0x77,
@@ -267,10 +269,7 @@ bool Sd2Card::init(uint8_t sckRateID, pin_t chipSelectPin) {
}
#if ENABLED(SD_CHECK_AND_RETRY)
- if (cardCommand( CMD59, 1 ) != R1_IDLE_STATE) {
- error(SD_CARD_ERROR_CMD59);
- goto FAIL;
- }
+ crcSupported = (cardCommand(CMD59, 1) == R1_IDLE_STATE);
#endif
// check SD version
@@ -450,7 +449,7 @@ bool Sd2Card::readData(uint8_t* dst, uint16_t count) {
#if ENABLED(SD_CHECK_AND_RETRY)
{
uint16_t recvCrc = (spiRec() << 8) | spiRec();
- if (recvCrc != CRC_CCITT(dst, count)) {
+ if (crcSupported && recvCrc != CRC_CCITT(dst, count)) {
error(SD_CARD_ERROR_READ_CRC);
goto FAIL;
}
diff --git a/Marlin/src/sd/Sd2Card.h b/Marlin/src/sd/Sd2Card.h
index 65633aa8c1..0df9c0ba64 100644
--- a/Marlin/src/sd/Sd2Card.h
+++ b/Marlin/src/sd/Sd2Card.h
@@ -71,7 +71,7 @@ uint8_t const SD_CARD_ERROR_CMD0 = 0x01, // timeout error for com
SD_CARD_ERROR_WRITE_TIMEOUT = 0x17, // timeout occurred during write programming
SD_CARD_ERROR_SCK_RATE = 0x18, // incorrect rate selected
SD_CARD_ERROR_INIT_NOT_CALLED = 0x19, // init() not called
- SD_CARD_ERROR_CMD59 = 0x1A, // card returned an error for CMD59 (CRC_ON_OFF)
+ // 0x1A is unused now, it was: card returned an error for CMD59 (CRC_ON_OFF)
SD_CARD_ERROR_READ_CRC = 0x1B; // invalid read CRC
// card types
--
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