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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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4
libraries/SD/src/SD.h
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@ -65,8 +65,8 @@ private:
public:
// This needs to be called to set up the connection to the SD card
// before other methods are used.
boolean begin(uint8_t csPin = SD_CHIP_SELECT_PIN);
boolean begin(uint8_t csPin = SD_CHIP_SELECT_PIN, uint32_t sckRateID = SPI_FULL_SPEED);
// Open the specified file/directory with the supplied mode (e.g. read or
// write, etc). Returns a File object for interacting with the file.
// Note that currently only one file can be open at a time.