Hello,
I'm trying the "RAWRITE" example from SdFat library (latest v1.0.7) with Teensy 3.6 (builtin card reader, 4 GB card preformatted with "SD Formatter" official utility).
https://github.com/greiman/SdFat/blob/master/examples/RawWrite/RawWrite.ino
I'm using Arduino IDE 1.8.5 and Teensyduino 1.44.
Since the example "as is" does not build with T3.6 (no SS pin for built-in card, and "BUILTIN_CARD" not defined), I've tried to adapt it to the SDIO objects which suit the T3.6.
So my source code is:
This builds and starts, but after a while I get an error:
Type any character to start
Start raw write of 5120000 bytes at
51200 bytes per second
Please wait 100 seconds
error: writeStop failed
SD errorCode: 0X28,0X10001
The compiler seems to use the right libraries:
Any advice?
Thanks
I'm trying the "RAWRITE" example from SdFat library (latest v1.0.7) with Teensy 3.6 (builtin card reader, 4 GB card preformatted with "SD Formatter" official utility).
https://github.com/greiman/SdFat/blob/master/examples/RawWrite/RawWrite.ino
I'm using Arduino IDE 1.8.5 and Teensyduino 1.44.
Since the example "as is" does not build with T3.6 (no SS pin for built-in card, and "BUILTIN_CARD" not defined), I've tried to adapt it to the SDIO objects which suit the T3.6.
So my source code is:
Code:
#include <SdFat.h>
#define SERIAL_SPEED 115200
// number of blocks in the contiguous file
const uint32_t BLOCK_COUNT = 10000UL; // 5 MB
// time to produce a block of data
const uint32_t MICROS_PER_BLOCK = 10000UL; // 10ms = 100 512byte_blocks/s = 51.2 KB/s
// file system
SdFatSdioEX sd;
// test file
SdFile file;
// file extent
uint32_t bgnBlock, endBlock;
// Serial output stream
ArduinoOutStream cout(Serial);
//------------------------------------------------------------------------------
// store error strings in flash to save RAM
#define error(s) sd.errorHalt(F(s))
//------------------------------------------------------------------------------
// log of first overruns
#define OVER_DIM 20
struct {
uint32_t block;
uint32_t micros;
} over[OVER_DIM];
//------------------------------------------------------------------------------
//////////
//
// SETUP
//
//////////
void setup(void) {
Serial.begin(SERIAL_SPEED);
while (!Serial) {} // wait for Leonardo
}
//------------------------------------------------------------------------------
//////////
//
// LOOP
//
//////////
void loop(void) {
while (Serial.read() >= 0) {}
// pstr stores strings in flash to save RAM
cout << F("Type any character to start\n");
while (Serial.read() <= 0) {}
delay(400); // catch Due reset problem
//cout << F("Free RAM: ") << FreeRam() << endl;
if (!sd.begin())
{
sd.initErrorHalt("SdFat begin() failed");
}
// make sdEx the current volume.
sd.chvol();
// delete possible existing file
sd.remove("RawWrite.txt");
// create a contiguous file
if (!file.createContiguous(sd.vwd(), "RawWrite.txt", 512UL*BLOCK_COUNT)) {
error("createContiguous failed");
}
// get the location of the file's blocks
if (!file.contiguousRange(&bgnBlock, &endBlock)) {
error("contiguousRange failed");
}
//*********************NOTE**************************************
// NO SdFile calls are allowed while cache is used for raw writes
//***************************************************************
// clear the cache and use it as a 512 byte buffer
uint8_t* pCache = (uint8_t*)sd.vol()->cacheClear();
// fill cache with eight lines of 64 bytes each
memset(pCache, ' ', 512);
for (uint16_t i = 0; i < 512; i += 64) {
// put line number at end of line then CR/LF
pCache[i + 61] = '0' + (i/64);
pCache[i + 62] = '\r';
pCache[i + 63] = '\n';
}
cout << F("Start raw write of ") << file.fileSize() << F(" bytes at\n");
cout << 512000000UL/MICROS_PER_BLOCK << F(" bytes per second\n");
cout << F("Please wait ") << (BLOCK_COUNT*MICROS_PER_BLOCK)/1000000UL;
cout << F(" seconds\n");
// tell card to setup for multiple block write with pre-erase
if (!sd.card()->writeStart(bgnBlock, BLOCK_COUNT)) {
error("writeStart failed");
}
// init stats
uint16_t overruns = 0;
uint32_t maxWriteTime = 0;
uint32_t t = micros();
uint32_t tNext = t;
// write data
for (uint32_t b = 0; b < BLOCK_COUNT; b++) {
// write must be done by this time
tNext += MICROS_PER_BLOCK;
// put block number at start of first line in block
uint32_t n = b;
for (int8_t d = 5; d >= 0; d--) {
pCache[d] = n || d == 5 ? n % 10 + '0' : ' ';
n /= 10;
}
// write a 512 byte block
uint32_t tw = micros();
if (!sd.card()->writeData(pCache)) {
error("writeData failed");
}
tw = micros() - tw;
// check for max write time
if (tw > maxWriteTime) {
maxWriteTime = tw;
}
// check for overrun
if (micros() > tNext) {
if (overruns < OVER_DIM) {
over[overruns].block = b;
over[overruns].micros = tw;
}
overruns++;
// advance time to reflect overrun
tNext = micros();
} else {
// wait for time to write next block
while(micros() < tNext);
}
}
// total write time
t = micros() - t;
// end multiple block write mode
if (!sd.card()->writeStop()) {
error("writeStop failed");
}
cout << F("Done\n");
cout << F("Elapsed time: ") << setprecision(3)<< 1.e-6*t;
cout << F(" seconds\n");
cout << F("Max write time: ") << maxWriteTime << F(" micros\n");
cout << F("Overruns: ") << overruns << endl;
if (overruns) {
uint8_t n = overruns > OVER_DIM ? OVER_DIM : overruns;
cout << F("fileBlock,micros") << endl;
for (uint8_t i = 0; i < n; i++) {
cout << over[i].block << ',' << over[i].micros << endl;
}
}
// close file for next pass of loop
file.close();
Serial.println();
}
This builds and starts, but after a while I get an error:
Type any character to start
Start raw write of 5120000 bytes at
51200 bytes per second
Please wait 100 seconds
error: writeStop failed
SD errorCode: 0X28,0X10001
The compiler seems to use the right libraries:
Code:
[...]
"D:\Arduino\hardware\teensy/../tools/teensy_post_compile" "-file=My_T35_RAWWRITE.ino" "-path=c:\temp\arduino_build_342837" "-tools=D:\Arduino\hardware\teensy/../tools/" "-board=TEENSY36"
Using library SdFat at version 1.0.7 in folder: D:\Arduino\hardware\teensy\avr\libraries\SdFat
Using library SPI at version 1.0 in folder: D:\Arduino\hardware\teensy\avr\libraries\SPI
Sketch uses 42476 bytes (4%) of program storage space. Maximum is 1048576 bytes.
Global variables use 5220 bytes (1%) of dynamic memory, leaving 256924 bytes for local variables. Maximum is 262144 bytes.
Any advice?
Thanks