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Fix unsupported CMD59

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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
This commit is contained in:
GMagician 2018-01-13 08:53:12 +01:00
parent d7fd78cb91
commit f37c64ee5b
2 changed files with 5 additions and 6 deletions
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9
Marlin/src/sd/Sd2Card.cpp
View File

@ -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;
}

2
Marlin/src/sd/Sd2Card.h
View File

@ -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