Cant write 16 bit data values while in 16 bit write mode #9
Description
I am trying to write data to an eeprom with some success but not quite. The chip is a 93c46 128 words at 8 bit or 64 words at 16 bit. The data to go in is in 64 word (16 bit) format as follows:
data to go in
When i write it to the chip and read it back i get:
data comes out
So its like its only writing one half of the value into each word.
I am using the code as below, with the data converted from hex to string to match the input type of the example code.
#include <93C46.h>
/*
* Example Sketch demonstration on how to write to (and read from) a 93C46 eeprom
*
* Wiring:
* Pin 7(CS) to Chip pin 1
* Pin 9(CS) to Chip pin 2
* Pin 10(DI/MOSI) to Chip pin 3
* Pin 11(DO/MISO) to Chip pin 4
*
* (For some chips:) GND/VCC to Chip pin 6
* This determines the organization:
* HIGH is 64x16 (Use EEPROM_MODE_16BIT)
* LOW is 128x8 (Use EEPROM_MODE_8BIT)
*
*/
#define pCS 10
#define pSK 13
#define pDI 11
#define pDO 12
// Prints all words of the buffer
void debugPrint(word* buff, int len) {
Serial.print("\n\t00\t01\t02\t03\t04\t05\t06\t07\t08\t09\t0A\t0B\t0C\t0D\t0E\t0F");
for(int i = 0; i < len; i++) {
if(i % 16 == 0) {
Serial.println();
Serial.print(i, HEX);
}
Serial.print("\t");
if(buff[i] < 0x10) {
Serial.print("0");
}
Serial.print(buff[i], HEX);
}
}
void setup() {
bool longMode = EEPROM_93C46_MODE_16BIT;
eeprom_93C46 e = eeprom_93C46(pCS, pSK, pDI, pDO);
e.set_mode(longMode);
Serial.begin(9600);
Serial.println("Writing data...");
// First, enable EW (Erase/Write)
e.ew_enable();
String writeBuffer;
if(longMode) {
writeBuffer = "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ÿÿÿÿÿÿÿÿÿÿÿÿÿÿ£çô3Ø¡²¥";
//writeBuffer = (!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!,!, ,ÿÿ,ÿÿ,ÿÿ,ÿÿ,ÿÿ,ÿÿ,ÿÿ,£,,ç,ô3,Ø¡,²,¥);
} else {
writeBuffer = "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ÿÿÿÿÿÿÿÿÿÿÿÿÿÿ£çô3Ø¡²¥";
}
int len = longMode ? 64 : 128;
// Write your data
for(int i = 0; i < len; i++) {
e.write(i, writeBuffer[i]);
}
// Optionally, disable EW after writing
e.ew_disable();
Serial.println("Reading data...\n");
word readBuffer[len];
for(int i = 0; i < len; i++) {
word r = e.read(i);
readBuffer[i] = r;
Serial.print(char(r));
}
debugPrint(readBuffer, len);
Serial.println();
}
void loop() {}