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639 lines
19 KiB
C++
639 lines
19 KiB
C++
/* Arduino Sd2Card Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino Sd2Card Library
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino Sd2Card Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "Marlin.h"
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#include "Sd2Card.h"
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//------------------------------------------------------------------------------
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#ifndef SOFTWARE_SPI
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// functions for hardware SPI
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//------------------------------------------------------------------------------
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// make sure SPCR rate is in expected bits
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#if (SPR0 != 0 || SPR1 != 1)
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#error unexpected SPCR bits
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#endif
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/**
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* Initialize hardware SPI
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* Set SCK rate to F_CPU/pow(2, 1 + spiRate) for spiRate [0,6]
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*/
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static void spiInit(uint8_t spiRate) {
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// See avr processor documentation
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SPCR = (1 << SPE) | (1 << MSTR) | (spiRate >> 1);
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SPSR = spiRate & 1 || spiRate == 6 ? 0 : 1 << SPI2X;
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}
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//------------------------------------------------------------------------------
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/** SPI receive a byte */
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static uint8_t spiRec() {
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SPDR = 0XFF;
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while (!(SPSR & (1 << SPIF)));
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return SPDR;
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}
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//------------------------------------------------------------------------------
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/** SPI read data - only one call so force inline */
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static inline __attribute__((always_inline))
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void spiRead(uint8_t* buf, uint16_t nbyte) {
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if (nbyte-- == 0) return;
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SPDR = 0XFF;
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for (uint16_t i = 0; i < nbyte; i++) {
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while (!(SPSR & (1 << SPIF)));
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buf[i] = SPDR;
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SPDR = 0XFF;
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}
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while (!(SPSR & (1 << SPIF)));
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buf[nbyte] = SPDR;
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}
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//------------------------------------------------------------------------------
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/** SPI send a byte */
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static void spiSend(uint8_t b) {
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SPDR = b;
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while (!(SPSR & (1 << SPIF)));
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}
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//------------------------------------------------------------------------------
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/** SPI send block - only one call so force inline */
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static inline __attribute__((always_inline))
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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SPDR = token;
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for (uint16_t i = 0; i < 512; i += 2) {
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while (!(SPSR & (1 << SPIF)));
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SPDR = buf[i];
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while (!(SPSR & (1 << SPIF)));
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SPDR = buf[i + 1];
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}
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while (!(SPSR & (1 << SPIF)));
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}
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//------------------------------------------------------------------------------
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#else // SOFTWARE_SPI
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//------------------------------------------------------------------------------
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/** nop to tune soft SPI timing */
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#define nop asm volatile ("nop\n\t")
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//------------------------------------------------------------------------------
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/** Soft SPI receive byte */
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static uint8_t spiRec() {
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uint8_t data = 0;
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// no interrupts during byte receive - about 8 us
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cli();
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// output pin high - like sending 0XFF
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fastDigitalWrite(SPI_MOSI_PIN, HIGH);
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for (uint8_t i = 0; i < 8; i++) {
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fastDigitalWrite(SPI_SCK_PIN, HIGH);
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// adjust so SCK is nice
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nop;
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nop;
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data <<= 1;
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if (fastDigitalRead(SPI_MISO_PIN)) data |= 1;
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fastDigitalWrite(SPI_SCK_PIN, LOW);
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}
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// enable interrupts
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sei();
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return data;
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}
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//------------------------------------------------------------------------------
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/** Soft SPI read data */
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static void spiRead(uint8_t* buf, uint16_t nbyte) {
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for (uint16_t i = 0; i < nbyte; i++) {
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buf[i] = spiRec();
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}
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}
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//------------------------------------------------------------------------------
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/** Soft SPI send byte */
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static void spiSend(uint8_t data) {
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// no interrupts during byte send - about 8 us
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cli();
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for (uint8_t i = 0; i < 8; i++) {
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fastDigitalWrite(SPI_SCK_PIN, LOW);
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fastDigitalWrite(SPI_MOSI_PIN, data & 0X80);
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data <<= 1;
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fastDigitalWrite(SPI_SCK_PIN, HIGH);
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}
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// hold SCK high for a few ns
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nop;
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nop;
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nop;
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nop;
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fastDigitalWrite(SPI_SCK_PIN, LOW);
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// enable interrupts
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sei();
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}
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//------------------------------------------------------------------------------
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/** Soft SPI send block */
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void spiSendBlock(uint8_t token, const uint8_t* buf) {
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spiSend(token);
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for (uint16_t i = 0; i < 512; i++) {
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spiSend(buf[i]);
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}
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}
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#endif // SOFTWARE_SPI
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//------------------------------------------------------------------------------
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// send command and return error code. Return zero for OK
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uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
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// select card
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chipSelectLow();
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// wait up to 300 ms if busy
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waitNotBusy(300);
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// send command
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spiSend(cmd | 0x40);
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// send argument
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for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
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// send CRC
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uint8_t crc = 0XFF;
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if (cmd == CMD0) crc = 0X95; // correct crc for CMD0 with arg 0
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if (cmd == CMD8) crc = 0X87; // correct crc for CMD8 with arg 0X1AA
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spiSend(crc);
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// skip stuff byte for stop read
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if (cmd == CMD12) spiRec();
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// wait for response
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for (uint8_t i = 0; ((status_ = spiRec()) & 0X80) && i != 0XFF; i++);
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return status_;
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}
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//------------------------------------------------------------------------------
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/**
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* Determine the size of an SD flash memory card.
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*
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* \return The number of 512 byte data blocks in the card
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* or zero if an error occurs.
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*/
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uint32_t Sd2Card::cardSize() {
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csd_t csd;
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if (!readCSD(&csd)) return 0;
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if (csd.v1.csd_ver == 0) {
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uint8_t read_bl_len = csd.v1.read_bl_len;
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uint16_t c_size = (csd.v1.c_size_high << 10)
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| (csd.v1.c_size_mid << 2) | csd.v1.c_size_low;
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uint8_t c_size_mult = (csd.v1.c_size_mult_high << 1)
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| csd.v1.c_size_mult_low;
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return (uint32_t)(c_size + 1) << (c_size_mult + read_bl_len - 7);
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} else if (csd.v2.csd_ver == 1) {
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uint32_t c_size = ((uint32_t)csd.v2.c_size_high << 16)
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| (csd.v2.c_size_mid << 8) | csd.v2.c_size_low;
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return (c_size + 1) << 10;
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} else {
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error(SD_CARD_ERROR_BAD_CSD);
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return 0;
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}
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}
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//------------------------------------------------------------------------------
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void Sd2Card::chipSelectHigh() {
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digitalWrite(chipSelectPin_, HIGH);
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}
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//------------------------------------------------------------------------------
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void Sd2Card::chipSelectLow() {
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#ifndef SOFTWARE_SPI
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spiInit(spiRate_);
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#endif // SOFTWARE_SPI
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digitalWrite(chipSelectPin_, LOW);
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}
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//------------------------------------------------------------------------------
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/** Erase a range of blocks.
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*
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* \param[in] firstBlock The address of the first block in the range.
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* \param[in] lastBlock The address of the last block in the range.
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*
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* \note This function requests the SD card to do a flash erase for a
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* range of blocks. The data on the card after an erase operation is
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* either 0 or 1, depends on the card vendor. The card must support
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* single block erase.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool Sd2Card::erase(uint32_t firstBlock, uint32_t lastBlock) {
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csd_t csd;
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if (!readCSD(&csd)) goto fail;
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// check for single block erase
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if (!csd.v1.erase_blk_en) {
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// erase size mask
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uint8_t m = (csd.v1.sector_size_high << 1) | csd.v1.sector_size_low;
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if ((firstBlock & m) != 0 || ((lastBlock + 1) & m) != 0) {
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// error card can't erase specified area
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error(SD_CARD_ERROR_ERASE_SINGLE_BLOCK);
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goto fail;
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}
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}
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if (type_ != SD_CARD_TYPE_SDHC) {
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firstBlock <<= 9;
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lastBlock <<= 9;
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}
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if (cardCommand(CMD32, firstBlock)
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|| cardCommand(CMD33, lastBlock)
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|| cardCommand(CMD38, 0)) {
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error(SD_CARD_ERROR_ERASE);
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goto fail;
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}
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if (!waitNotBusy(SD_ERASE_TIMEOUT)) {
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error(SD_CARD_ERROR_ERASE_TIMEOUT);
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goto fail;
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}
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chipSelectHigh();
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return true;
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/** Determine if card supports single block erase.
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*
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* \return The value one, true, is returned if single block erase is supported.
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* The value zero, false, is returned if single block erase is not supported.
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*/
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bool Sd2Card::eraseSingleBlockEnable() {
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csd_t csd;
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return readCSD(&csd) ? csd.v1.erase_blk_en : false;
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}
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//------------------------------------------------------------------------------
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/**
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* Initialize an SD flash memory card.
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*
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* \param[in] sckRateID SPI clock rate selector. See setSckRate().
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* \param[in] chipSelectPin SD chip select pin number.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure. The reason for failure
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* can be determined by calling errorCode() and errorData().
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*/
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bool Sd2Card::init(uint8_t sckRateID, uint8_t chipSelectPin) {
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errorCode_ = type_ = 0;
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chipSelectPin_ = chipSelectPin;
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// 16-bit init start time allows over a minute
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uint16_t t0 = (uint16_t)millis();
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uint32_t arg;
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// set pin modes
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pinMode(chipSelectPin_, OUTPUT);
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chipSelectHigh();
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pinMode(SPI_MISO_PIN, INPUT);
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pinMode(SPI_MOSI_PIN, OUTPUT);
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pinMode(SPI_SCK_PIN, OUTPUT);
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#ifndef SOFTWARE_SPI
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// SS must be in output mode even it is not chip select
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pinMode(SS_PIN, OUTPUT);
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// set SS high - may be chip select for another SPI device
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#if SET_SPI_SS_HIGH
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digitalWrite(SS_PIN, HIGH);
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#endif // SET_SPI_SS_HIGH
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// set SCK rate for initialization commands
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spiRate_ = SPI_SD_INIT_RATE;
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spiInit(spiRate_);
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#endif // SOFTWARE_SPI
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// must supply min of 74 clock cycles with CS high.
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for (uint8_t i = 0; i < 10; i++) spiSend(0XFF);
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// command to go idle in SPI mode
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while ((status_ = cardCommand(CMD0, 0)) != R1_IDLE_STATE) {
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if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
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error(SD_CARD_ERROR_CMD0);
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goto fail;
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}
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}
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// check SD version
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if ((cardCommand(CMD8, 0x1AA) & R1_ILLEGAL_COMMAND)) {
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type(SD_CARD_TYPE_SD1);
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} else {
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// only need last byte of r7 response
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for (uint8_t i = 0; i < 4; i++) status_ = spiRec();
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if (status_ != 0XAA) {
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error(SD_CARD_ERROR_CMD8);
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goto fail;
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}
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type(SD_CARD_TYPE_SD2);
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}
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// initialize card and send host supports SDHC if SD2
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arg = type() == SD_CARD_TYPE_SD2 ? 0X40000000 : 0;
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while ((status_ = cardAcmd(ACMD41, arg)) != R1_READY_STATE) {
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// check for timeout
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if (((uint16_t)millis() - t0) > SD_INIT_TIMEOUT) {
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error(SD_CARD_ERROR_ACMD41);
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goto fail;
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}
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}
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// if SD2 read OCR register to check for SDHC card
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if (type() == SD_CARD_TYPE_SD2) {
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if (cardCommand(CMD58, 0)) {
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error(SD_CARD_ERROR_CMD58);
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goto fail;
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}
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if ((spiRec() & 0XC0) == 0XC0) type(SD_CARD_TYPE_SDHC);
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// discard rest of ocr - contains allowed voltage range
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for (uint8_t i = 0; i < 3; i++) spiRec();
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}
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chipSelectHigh();
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#ifndef SOFTWARE_SPI
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return setSckRate(sckRateID);
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#else // SOFTWARE_SPI
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return true;
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#endif // SOFTWARE_SPI
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/**
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* Read a 512 byte block from an SD card.
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*
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* \param[in] blockNumber Logical block to be read.
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* \param[out] dst Pointer to the location that will receive the data.
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool Sd2Card::readBlock(uint32_t blockNumber, uint8_t* dst) {
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// use address if not SDHC card
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if (type()!= SD_CARD_TYPE_SDHC) blockNumber <<= 9;
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if (cardCommand(CMD17, blockNumber)) {
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error(SD_CARD_ERROR_CMD17);
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goto fail;
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}
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return readData(dst, 512);
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/** Read one data block in a multiple block read sequence
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*
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* \param[in] dst Pointer to the location for the data to be read.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool Sd2Card::readData(uint8_t *dst) {
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chipSelectLow();
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return readData(dst, 512);
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}
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//------------------------------------------------------------------------------
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bool Sd2Card::readData(uint8_t* dst, uint16_t count) {
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// wait for start block token
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uint16_t t0 = millis();
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while ((status_ = spiRec()) == 0XFF) {
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if (((uint16_t)millis() - t0) > SD_READ_TIMEOUT) {
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error(SD_CARD_ERROR_READ_TIMEOUT);
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goto fail;
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}
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}
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if (status_ != DATA_START_BLOCK) {
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error(SD_CARD_ERROR_READ);
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goto fail;
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}
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// transfer data
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spiRead(dst, count);
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// discard CRC
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spiRec();
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spiRec();
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chipSelectHigh();
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return true;
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/** read CID or CSR register */
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bool Sd2Card::readRegister(uint8_t cmd, void* buf) {
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uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
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if (cardCommand(cmd, 0)) {
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error(SD_CARD_ERROR_READ_REG);
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goto fail;
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}
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return readData(dst, 16);
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/** Start a read multiple blocks sequence.
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*
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* \param[in] blockNumber Address of first block in sequence.
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*
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* \note This function is used with readData() and readStop() for optimized
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* multiple block reads. SPI chipSelect must be low for the entire sequence.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool Sd2Card::readStart(uint32_t blockNumber) {
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if (type()!= SD_CARD_TYPE_SDHC) blockNumber <<= 9;
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if (cardCommand(CMD18, blockNumber)) {
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error(SD_CARD_ERROR_CMD18);
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goto fail;
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}
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chipSelectHigh();
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return true;
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/** End a read multiple blocks sequence.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool Sd2Card::readStop() {
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chipSelectLow();
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if (cardCommand(CMD12, 0)) {
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error(SD_CARD_ERROR_CMD12);
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goto fail;
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}
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chipSelectHigh();
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return true;
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fail:
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chipSelectHigh();
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return false;
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}
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//------------------------------------------------------------------------------
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/**
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* Set the SPI clock rate.
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*
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* \param[in] sckRateID A value in the range [0, 6].
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*
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* The SPI clock will be set to F_CPU/pow(2, 1 + sckRateID). The maximum
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* SPI rate is F_CPU/2 for \a sckRateID = 0 and the minimum rate is F_CPU/128
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* for \a scsRateID = 6.
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*
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* \return The value one, true, is returned for success and the value zero,
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* false, is returned for an invalid value of \a sckRateID.
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*/
|
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bool Sd2Card::setSckRate(uint8_t sckRateID) {
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if (sckRateID > 6) {
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error(SD_CARD_ERROR_SCK_RATE);
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return false;
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}
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spiRate_ = sckRateID;
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return true;
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}
|
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//------------------------------------------------------------------------------
|
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// wait for card to go not busy
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|
bool Sd2Card::waitNotBusy(uint16_t timeoutMillis) {
|
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uint16_t t0 = millis();
|
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while (spiRec() != 0XFF) {
|
|
if (((uint16_t)millis() - t0) >= timeoutMillis) goto fail;
|
|
}
|
|
return true;
|
|
|
|
fail:
|
|
return false;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/**
|
|
* Writes a 512 byte block to an SD card.
|
|
*
|
|
* \param[in] blockNumber Logical block to be written.
|
|
* \param[in] src Pointer to the location of the data to be written.
|
|
* \return The value one, true, is returned for success and
|
|
* the value zero, false, is returned for failure.
|
|
*/
|
|
bool Sd2Card::writeBlock(uint32_t blockNumber, const uint8_t* src) {
|
|
// use address if not SDHC card
|
|
if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
|
|
if (cardCommand(CMD24, blockNumber)) {
|
|
error(SD_CARD_ERROR_CMD24);
|
|
goto fail;
|
|
}
|
|
if (!writeData(DATA_START_BLOCK, src)) goto fail;
|
|
|
|
// wait for flash programming to complete
|
|
if (!waitNotBusy(SD_WRITE_TIMEOUT)) {
|
|
error(SD_CARD_ERROR_WRITE_TIMEOUT);
|
|
goto fail;
|
|
}
|
|
// response is r2 so get and check two bytes for nonzero
|
|
if (cardCommand(CMD13, 0) || spiRec()) {
|
|
error(SD_CARD_ERROR_WRITE_PROGRAMMING);
|
|
goto fail;
|
|
}
|
|
chipSelectHigh();
|
|
return true;
|
|
|
|
fail:
|
|
chipSelectHigh();
|
|
return false;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Write one data block in a multiple block write sequence
|
|
* \param[in] src Pointer to the location of the data to be written.
|
|
* \return The value one, true, is returned for success and
|
|
* the value zero, false, is returned for failure.
|
|
*/
|
|
bool Sd2Card::writeData(const uint8_t* src) {
|
|
chipSelectLow();
|
|
// wait for previous write to finish
|
|
if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
|
|
if (!writeData(WRITE_MULTIPLE_TOKEN, src)) goto fail;
|
|
chipSelectHigh();
|
|
return true;
|
|
|
|
fail:
|
|
error(SD_CARD_ERROR_WRITE_MULTIPLE);
|
|
chipSelectHigh();
|
|
return false;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
// send one block of data for write block or write multiple blocks
|
|
bool Sd2Card::writeData(uint8_t token, const uint8_t* src) {
|
|
spiSendBlock(token, src);
|
|
|
|
spiSend(0xff); // dummy crc
|
|
spiSend(0xff); // dummy crc
|
|
|
|
status_ = spiRec();
|
|
if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
|
|
error(SD_CARD_ERROR_WRITE);
|
|
goto fail;
|
|
}
|
|
return true;
|
|
|
|
fail:
|
|
chipSelectHigh();
|
|
return false;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** Start a write multiple blocks sequence.
|
|
*
|
|
* \param[in] blockNumber Address of first block in sequence.
|
|
* \param[in] eraseCount The number of blocks to be pre-erased.
|
|
*
|
|
* \note This function is used with writeData() and writeStop()
|
|
* for optimized multiple block writes.
|
|
*
|
|
* \return The value one, true, is returned for success and
|
|
* the value zero, false, is returned for failure.
|
|
*/
|
|
bool Sd2Card::writeStart(uint32_t blockNumber, uint32_t eraseCount) {
|
|
// send pre-erase count
|
|
if (cardAcmd(ACMD23, eraseCount)) {
|
|
error(SD_CARD_ERROR_ACMD23);
|
|
goto fail;
|
|
}
|
|
// use address if not SDHC card
|
|
if (type() != SD_CARD_TYPE_SDHC) blockNumber <<= 9;
|
|
if (cardCommand(CMD25, blockNumber)) {
|
|
error(SD_CARD_ERROR_CMD25);
|
|
goto fail;
|
|
}
|
|
chipSelectHigh();
|
|
return true;
|
|
|
|
fail:
|
|
chipSelectHigh();
|
|
return false;
|
|
}
|
|
//------------------------------------------------------------------------------
|
|
/** End a write multiple blocks sequence.
|
|
*
|
|
* \return The value one, true, is returned for success and
|
|
* the value zero, false, is returned for failure.
|
|
*/
|
|
bool Sd2Card::writeStop() {
|
|
chipSelectLow();
|
|
if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
|
|
spiSend(STOP_TRAN_TOKEN);
|
|
if (!waitNotBusy(SD_WRITE_TIMEOUT)) goto fail;
|
|
chipSelectHigh();
|
|
return true;
|
|
|
|
fail:
|
|
error(SD_CARD_ERROR_STOP_TRAN);
|
|
chipSelectHigh();
|
|
return false;
|
|
}
|