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SD:

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- optimize SPI usage 148% write speed (24kB/s -> 37kB/s) and 127% read speed (121kB/s -> 155kB/s) at 8MHz
 - add clock frequency as parameter for begin(csPin, frequency)
 - SD @80MHz write: 84kB/s read: 231kB/s

SPI add functions:
 - void write32(uint32_t data);
 - void write32(uint32_t data, bool msb);
 - void transferBytes(uint8_t * out, uint8_t * in, uint32_t size);

Adafruit_ILI9341:
 - code clean
This commit is contained in:
Markus Sattler
2015-05-10 17:34:16 +02:00
parent 539aa19305
commit 27f45a205a
5 changed files with 135 additions and 20 deletions
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36
libraries/SD/src/utility/Sd2Card.cpp
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@ -33,9 +33,13 @@ static void spiSend(uint8_t b) {
SPDR = b;
while (!(SPSR & (1 << SPIF)))
;
#else
#ifdef ESP8266
SPI.write(b);
#else
SPI.transfer(b);
#endif
#endif
}
/** Receive a byte from the card */
static uint8_t spiRec(void) {
@ -116,8 +120,14 @@ uint8_t Sd2Card::cardCommand(uint8_t cmd, uint32_t arg) {
// send command
spiSend(cmd | 0x40);
#ifdef ESP8266
// send argument
SPI.write32(arg, true);
#else
// send argument
for (int8_t s = 24; s >= 0; s -= 8) spiSend(arg >> s);
#endif
// send CRC
uint8_t crc = 0xFF;
@ -424,7 +434,14 @@ uint8_t Sd2Card::readData(uint32_t block,
dst[n] = SPDR;
#else // OPTIMIZE_HARDWARE_SPI
#ifdef ESP8266
// skip data before offset
SPI.transferBytes(NULL, NULL, offset_);
// transfer data
SPI.transferBytes(NULL, dst, count);
#else
// skip data before offset
for (;offset_ < offset; offset_++) {
spiRec();
@ -433,6 +450,7 @@ uint8_t Sd2Card::readData(uint32_t block,
for (uint16_t i = 0; i < count; i++) {
dst[i] = spiRec();
}
#endif
#endif // OPTIMIZE_HARDWARE_SPI
offset_ += count;
@ -463,7 +481,11 @@ void Sd2Card::readEnd(void) {
while (!(SPSR & (1 << SPIF)))
;
#else // OPTIMIZE_HARDWARE_SPI
#ifdef ESP8266
SPI.transferBytes(NULL, NULL, (514-offset_));
#else
while (offset_++ < 514) spiRec();
#endif
#endif // OPTIMIZE_HARDWARE_SPI
chipSelectHigh();
inBlock_ = 0;
@ -479,7 +501,11 @@ uint8_t Sd2Card::readRegister(uint8_t cmd, void* buf) {
}
if (!waitStartBlock()) goto fail;
// transfer data
#ifdef ESP8266
SPI.transferBytes(NULL, dst, 16);
#else
for (uint16_t i = 0; i < 16; i++) dst[i] = spiRec();
#endif
spiRec(); // get first crc byte
spiRec(); // get second crc byte
chipSelectHigh();
@ -646,13 +672,21 @@ uint8_t Sd2Card::writeData(uint8_t token, const uint8_t* src) {
#else // OPTIMIZE_HARDWARE_SPI
spiSend(token);
#ifdef ESP8266
// send argument
SPI.writeBytes((uint8_t *)src, 512);
#else
for (uint16_t i = 0; i < 512; i++) {
spiSend(src[i]);
}
#endif
#endif // OPTIMIZE_HARDWARE_SPI
#ifdef ESP8266
SPI.write16(0xFFFF, true);
#else
spiSend(0xff); // dummy crc
spiSend(0xff); // dummy crc
#endif
status_ = spiRec();
if ((status_ & DATA_RES_MASK) != DATA_RES_ACCEPTED) {
error(SD_CARD_ERROR_WRITE);