Buongiorno a tutti.
Ho comprato il chip (DIP) 23LCV1024 su aliexpress (spero non sia fallato).
Creato mio modulino collegamento SPI:
Potete vedere che le saldature non mi sono venute bene, però...
usando la libreria mi capita una cosa strana, sempre uguale, non randomica
domanda 1. se fossero problemi sul segnale SPI non dovrebbero essere random?
Ora usando il programma di test della libreria (tolto alcune righe vuote x accorciarlo x forum), arduino Uno R3:
/* Sample usage of NVSRAM library with different Arduino data types.
Guglielmo Braguglia - Dec. 2020 */
#include <NVSRAM.h>
/* Leave the following #define uncommented if you want to do a complete
WRITE/READ BACK cycle. Comment if you want only to da a READ BACK cycle
to verify battery data retention */
#define WR_RD
/* Lave the following #define uncommented if you want to use the automatic
default SPI bus initialization. Comment if you want to use a manual SPI
bus initialization with specific parameters */
#define SPI_INIT
/* ------------------------------------------------------------------------ */
#ifdef SPI_INIT
NVSRAM myNVSRAM ( 10 );
#else
NVSRAM myNVSRAM ( 10, false );
#endif
void setup ( void ) {
byte b = 0;
int i = 0;
float f = 0.0;
byte a[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
struct myStruct {
byte by = 0;
int in = 0;
float fl = 0.0;
byte ar[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
} s;
unsigned long tStart = 0, tEnd = 0;
unsigned int block_crc = 0;
byte j;
delay ( 500 );
Serial.begin ( 115200 );
#ifndef SPI_INIT
SPI.begin();
SPI.beginTransaction(SPISettings(8000000, MSBFIRST, SPI_MODE0));
myNVSRAM.begin();
#endif
#ifdef WR_RD
Serial.println ( "Demo program WRITE/READ begins ..." );
/* Erase all the NVSRAM memory */
tStart = micros();
myNVSRAM.erase();
tEnd = micros();
Serial.print ( "Memory erased in " );
Serial.print ( tEnd - tStart );
Serial.print ( " µsec; " );
Serial.print ( "Bytes erased: " );
Serial.print ( myNVSRAM.length() );
Serial.print ( ", µsec per byte≈ " );
Serial.println ( ( tEnd - tStart ) / myNVSRAM.length() );
Serial.println( );
#else
Serial.println ( "Demo program READ ONLY begins ..." );
#endif
#ifdef WR_RD
b = 127;
myNVSRAM.write ( 0x0000, b );
#endif
b = myNVSRAM.read ( 0x0000 );
Serial.print ( "Byte b reading with read (expected 127): " );
Serial.println ( b );
b = myNVSRAM[ 0 ];
Serial.print ( "Byte b reading with [] (expected 127): " );
Serial.println ( b );
#ifdef WR_RD
i = -127;
myNVSRAM.put ( 0x0001, i );
#endif
myNVSRAM.get ( 0x0001, i );
Serial.print ( "Integer i reading with get (expected -127): " );
Serial.println ( i );
#ifdef WR_RD
f = 127.12;
myNVSRAM.put ( 0x0003, f );
#endif
myNVSRAM.get ( 0x0003, f );
Serial.print ( "Float f reading with get (expected 127.12): " );
Serial.println ( f );
#ifdef WR_RD
for ( j = 0; j < 10; j++) a[j] = j;
myNVSRAM.put ( 0x0007, a );
#endif
myNVSRAM.get ( 0x0007, a );
Serial.print ( "Array a reading with get (expected 0..9): " );
for ( j = 0; j < 10; j++ ) {
Serial.print ( a[j] );
if ( j < 9 ) Serial.print ( ", " );
}
Serial.println ( );
#ifdef WR_RD
s.by = 127;
s.in = -127;
s.fl = 127.12;
for ( j = 0; j < 10; j++) s.ar[j] = j;
myNVSRAM.put ( 0x0011, s );
#endif
myNVSRAM.get ( 0x0011, s );
Serial.println ( "Structure s reading with get ..." );
Serial.print ( " - byte by value (expected 127): " );
Serial.println ( s.by );
Serial.print ( " - integer in value (expected -127): " );
Serial.println ( s.in );
Serial.print ( " - float fl value (expected 127.12): " );
Serial.println ( s.fl );
Serial.print ( " - byte array ar value (expected 0..9): " );
for ( j = 0; j < 10; j++ ) {
Serial.print ( s.ar[j] );
if ( j < 9 ) Serial.print ( ", " );
}
Serial.println ( );
Serial.println ( );
block_crc = myNVSRAM.crc ( 0, 34 );
Serial.print ( "CRC16 of first 34 bytes (expected 12711): " );
Serial.println ( block_crc );
Serial.println ( );
Serial.println ( "Test completed." );
#ifndef SPI_INIT
SPI.endTransaction();
#endif
}
void loop ( void ) {}
ottengo su serial monitor:
Demo program WRITE/READ begins ...
Memory erased in 444684 µsec; Bytes erased: 131071, µsec per byte≈ 3
Byte b reading with read (expected 127): 127
Byte b reading with [] (expected 127): 127
Integer i reading with get (expected -127): -127
Float f reading with get (expected 127.12): 127.12
Array a reading with get (expected 0..9): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Structure s reading with get ...
- byte by value (expected 127): 127
- integer in value (expected -127): -127
- float fl value (expected 127.12): 127.12
- byte array ar value (expected 0..9): 0, 1, 2, 3, 4, 5, 6, 7, 65, 66
CRC16 of first 34 bytes (expected 12711): 38608
Test completed.
!! diverso da ieri... forse i collegamenti hw fanno proprio pena. Ieri non funzionava float e array
