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Daniele Verducci su MatissePenguin
2020-12-13 12:49:22 +01:00
parent 0e1caa3739
commit a906942002
5 changed files with 2 additions and 175 deletions
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assets/README.md Normal file
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# Assets
This folder contains all the media assets for presenting Pat80 to the web, print and other media

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eeprom_programmer/eeprom_programmer/eeprom_programmer.ino
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/* ************** EEPROM PROGRAMMER ******************
HARDWARE:
CORRISPONDENZA PIN EEPROM Atmel AT28C64B -> ARDUINO MEGA 2560
(Compatibile con eeprom fino a 16 bit di address bus. In caso di altre eeprom collegare secondo datasheet)
NB: Nel caso della eeprom da 8k, ci sono solo 12 address bus, quindi gli altri 4 pin provenienti dall'Arduino
vengono lasciati disconnessi
Arduino VCC 11 38 40 44 10 42 12 9 8 7 6 5
Eeprom 28 27 26 25 24 23 22 21 20 19 18 17 16 15
____________________________________________________________________
| |
| |
|_ |
|_) Atmel AT28C64B |
| |
| |
|____________________________________________________________________|
Eeprom 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Arduino 46 36 34 32 30 28 26 24 22 2 3 4 GND
CORRISPONDENZA FUNZIONALE:
Address bus (A0...A15): 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52
Data bus (D0...D7): 2, 3, 4, 5, 6, 7, 8, 9
Control bus:
/OE 10
/WE 11
/CE 12
*/
const byte ROM_DATA[] = {0x76, 0x00, 0x00, 0x00, 0x76, 0x00, 0x00};
const byte ADDR_BUS[] = {52, 50, 48, 46, 44, 42, 40, 38, 36, 34, 32, 30, 28, 26, 24, 22};
const byte DATA_BUS[] = {9, 8, 7, 6, 5, 4, 3, 2};
const byte CTRL_BUS_OE = 10;
const byte CTRL_BUS_WE = 11;
const byte CTRL_BUS_CE = 12;
void setup() {
Serial.begin(57600);
for(int pin=0; pin < 16; pin++) {
pinMode(ADDR_BUS[pin], OUTPUT);
}
setDataBusAs(INPUT);
pinMode(CTRL_BUS_OE, OUTPUT);
pinMode(CTRL_BUS_WE, OUTPUT);
pinMode(CTRL_BUS_CE, OUTPUT);
digitalWrite(CTRL_BUS_OE, HIGH); //Active low
digitalWrite(CTRL_BUS_WE, HIGH); //Active low
digitalWrite(CTRL_BUS_CE, HIGH); //Active low
delay(1000);
//readRom(8192);
writeRom();
verifyRom();
}
void writeRom() {
digitalWrite(CTRL_BUS_OE, HIGH);
setDataBusAs(OUTPUT);
Serial.print("Starting to write ROM... ");
for (int i=0; i<sizeof(ROM_DATA); i++) {
writeIntToAddressBus(i);
delayMicroseconds(5); // Address hold time (tAH)
digitalWrite(CTRL_BUS_CE, LOW);
digitalWrite(CTRL_BUS_WE, LOW);
writeByteToDataBus(ROM_DATA[i]);
delayMicroseconds(5); // Data setup time (tDS)
digitalWrite(CTRL_BUS_WE, HIGH);
digitalWrite(CTRL_BUS_CE, HIGH); //Active low
delayMicroseconds(5); // Data hold time (tDH)
}
setDataBusAs(INPUT);
Serial.println("Done.");
}
void verifyRom() {
Serial.print("Starting to verify ROM... ");
digitalWrite(CTRL_BUS_WE, HIGH); //Active low
char output[50] = {};
for (int i=0; i<sizeof(ROM_DATA); i++) {
writeIntToAddressBus(i);
delayMicroseconds(5);
digitalWrite(CTRL_BUS_OE, LOW); //Active low
digitalWrite(CTRL_BUS_CE, LOW); //Active low
delayMicroseconds(5);
byte readData = getData();
if(readData != ROM_DATA[i]) {
sprintf(output, "Error at addr %04x: expected %02x, found %02x", i, ROM_DATA[i], readData);
Serial.println(output);
}
while(true){}
digitalWrite(CTRL_BUS_OE, HIGH); //Active low
digitalWrite(CTRL_BUS_CE, HIGH); //Active low
delayMicroseconds(5);
}
Serial.println("Done.");
}
void readRom(int bytes) {
digitalWrite(CTRL_BUS_WE, HIGH); //Active low
char output[50] = {};
for (int i=0; i<bytes; i++) {
writeIntToAddressBus(i);
delayMicroseconds(5);
digitalWrite(CTRL_BUS_OE, LOW); //Active low
digitalWrite(CTRL_BUS_CE, LOW); //Active low
delayMicroseconds(5);
byte readData = getData();
sprintf(output, "0x%02x ", readData);
Serial.print(output);
digitalWrite(CTRL_BUS_OE, HIGH); //Active low
digitalWrite(CTRL_BUS_CE, HIGH); //Active low
delayMicroseconds(5);
}
Serial.println("Done.");
}
unsigned int getData() {
setDataBusAs(INPUT);
unsigned int data = 0;
for(int pin=0; pin < 8; pin++) {
byte b = digitalRead(DATA_BUS[pin]) ? 1 : 0;
data = (data << 1) + b; // Shifta di 1 e aggiunge il bit corrente. Serve per ricostruire il numero da binario
}
return data;
}
void setDataBusAs(byte mode){
for(int pin=0; pin < 8; pin++) {
pinMode(DATA_BUS[pin], mode);
}
}
void writeByteToDataBus(byte j) {
setDataBusAs(OUTPUT);
for (int n=0; n<8; n++)
{
if((0x01&j) < 0x01)
{
digitalWrite(DATA_BUS[n],LOW);
} else {
digitalWrite(DATA_BUS[n],HIGH);
}
j>>=1;
}
}
void writeIntToAddressBus(int j) {
for (int n=0; n<16; n++)
{
if((0x01&j) < 0x01)
{
digitalWrite(ADDR_BUS[n],LOW);
} else {
digitalWrite(ADDR_BUS[n],HIGH);
}
j>>=1;
}
}
void loop() {}