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Eprommer595.ino
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Eprommer595.ino
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#include "serial_utils.h"
#include "data_jute6k_video.h"
//#include "data_ub8830_jute6k.h"
//#include "data_ub8830_jute6k_modified_keyboard.h"
const uint8_t PIN_SER = 8;
const uint8_t PIN_OE = 9;
const uint8_t PIN_RCLK = 10;
const uint8_t PIN_SERCLK = 11;
const uint8_t PIN_D0 = 0;
const uint8_t PIN_D1 = 1;
const uint8_t PIN_D2 = 2;
const uint8_t PIN_D3 = 3;
const uint8_t PIN_D4 = 4;
const uint8_t PIN_D5 = 5;
const uint8_t PIN_D6 = 6;
const uint8_t PIN_D7 = 7;
const uint8_t DEBUG = 0;
void setup() {
pinMode(PIN_SER, OUTPUT);
pinMode(PIN_OE, OUTPUT);
pinMode(PIN_RCLK, OUTPUT);
pinMode(PIN_SERCLK, OUTPUT);
setDataMode(INPUT);
setAddress_WE_OE_CS(0, 1, 1, 1);
Serial.begin(9600);
while (!Serial) {
// wait
}
Serial.println("start" );
// uncomment the next 2 lines to write and verify the imported DATA array
//writeData();
//verifyData();
printRomContent(0, 0x2000);
}
void loop() {
}
void testWriteRead() {
for (int i = 0; i < 0x800; i++) {
write(i, 0xff);
}
printRomContent(0, 0x800);
}
uint8_t readData(int address) {
return pgm_read_byte(DATA + address);
}
void writeData() {
Serial.println("Writing");
for (int i = 0; i < DATA_LENGTH; i++) {
if (i % 16 == 0) {
if (i > 0) {
Serial.println();
}
serialPrintHex(i, 4);
Serial.print(" ");
}
writeAndVerify(i, readData(i));
}
}
void verifyData() {
Serial.println("Verifying");
int errors = 0;
for (int i = 0; i < DATA_LENGTH; i++) {
if (i % 16 == 0) {
if (i > 0) {
Serial.println();
}
serialPrintHex(i, 4);
}
uint8_t readValue = read(i);
uint8_t expectedValue = readData(i);
if (readValue != expectedValue) {
Serial.print(" expected ");
serialPrintHex(expectedValue, 2);
Serial.print(" at ");
serialPrintHex(i, 4);
Serial.print(", but read ");
serialPrintHex(readValue, 2);
Serial.println();
errors++;
}
if (i % 16 == 15 || i + 1 == DATA_LENGTH) {
Serial.println(" OK");
}
}
if (errors == 0) {
Serial.println("No errors :)");
}
else {
Serial.print(errors);
Serial.println(" errors :(");
}
}
void printRomContent(int start, int end) {
for (int i = start; i < end; i++) {
if (i % 16 == 0) {
if (i > 0) {
Serial.println();
}
serialPrintHex(i, 4);
}
Serial.print(" ");
uint8_t value = read(i);
serialPrintHex(value, 2);
}
Serial.println();
}
void writeAndVerify(uint16_t address, uint8_t value) {
if (DEBUG == 1) {
serialPrintHex(address, 4);
Serial.print(":=");
serialPrintHex(value, 2);
Serial.println(">");
}
uint8_t existingValue = read(address);
if (existingValue == value) {
Serial.print(" ");
return;
}
write(address, value);
delay(10);
for (int i = 0; i < 10; i++) {
uint8_t readValue = read(address);
if (readValue == value) {
return;
}
Serial.print(".");
}
Serial.print("FAILURE at ");
serialPrintHex(address, 4);
Serial.print(" - aborting");
while (true) {
}
}
void write(uint16_t address, uint8_t value) {
setAddress_WE_OE_CS(address, 1, 1, 1);
// In the XL1816 the write cycle is initiated by applying
// a logical 0 to both /WE adn /CE while /OE is logical 1.
// The address inputs are latched into the device on the
// falling edge of /WE or /CE (whichever is last) to specify
// the address that is to be written.
setAddress_WE_OE_CS(address, 0, 1, 0);
setDataMode(OUTPUT);
writeByte(value);
// Data on the I/O pins is then latched into the device by
// bringing either /WE or /CE high.
setAddress_WE_OE_CS(address, 1, 1, 1);
// Once the data is latched, the XL2816 will automatically
// erase the selected byte and write the new data in less
// than 10ms.
// The system is therefore freed to proceed with other operations
// while the XL2816 autnomously executes its internal write cycle.
// The I/O pins will be in a high impedance state while the write
// operation is in progress with the exception of I/O7 if a read
// command is asserted.
setDataMode(INPUT);
}
void writeByte(uint8_t value) {
digitalWrite(PIN_D0, (value & 1 << 0) != 0);
digitalWrite(PIN_D1, (value & 1 << 1) != 0);
digitalWrite(PIN_D2, (value & 1 << 2) != 0);
digitalWrite(PIN_D3, (value & 1 << 3) != 0);
digitalWrite(PIN_D4, (value & 1 << 4) != 0);
digitalWrite(PIN_D5, (value & 1 << 5) != 0);
digitalWrite(PIN_D6, (value & 1 << 6) != 0);
digitalWrite(PIN_D7, (value & 1 << 7) != 0);
}
uint8_t read(uint16_t address) {
setDataMode(INPUT);
setAddress_WE_OE_CS(address, 1, 1, 1);
setAddress_WE_OE_CS(address, 1, 0, 0);
uint8_t value = readByte();
setAddress_WE_OE_CS(address, 1, 1, 1);
return value;
}
uint8_t readByte() {
return digitalRead(PIN_D0) << 0
| digitalRead(PIN_D1) << 1
| digitalRead(PIN_D2) << 2
| digitalRead(PIN_D3) << 3
| digitalRead(PIN_D4) << 4
| digitalRead(PIN_D5) << 5
| digitalRead(PIN_D6) << 6
| digitalRead(PIN_D7) << 7;
}
void setDataMode(uint8_t mode) {
pinMode(PIN_D0, mode);
pinMode(PIN_D1, mode);
pinMode(PIN_D2, mode);
pinMode(PIN_D3, mode);
pinMode(PIN_D4, mode);
pinMode(PIN_D5, mode);
pinMode(PIN_D6, mode);
pinMode(PIN_D7, mode);
}
void setAddress_WE_OE_CS(uint16_t address, uint8_t we, uint8_t oe, uint8_t cs) {
uint16_t value = address & 0x1FFF;
if (we != 0) {
value |= 0x2000;
}
if (oe != 0) {
value |= 0x4000;
}
if (cs != 0) {
value |= 0x8000;
}
shift16(value);
}
void shift16(uint16_t value) {
if (DEBUG == 1) {
Serial.print("value = ");
Serial.println(value, BIN);
}
// the serial registers are connected in the wrong order
// so we need to switch here the bytes
digitalWrite(PIN_OE, 0);
digitalWrite(PIN_RCLK, 0);
digitalWrite(PIN_SERCLK, 0);
shift8(value);
shift8(value >> 8);
digitalWrite(PIN_RCLK, 1);
delayMicroseconds(1);
digitalWrite(PIN_RCLK, 0);
delayMicroseconds(1);
digitalWrite(PIN_OE, 0);
delayMicroseconds(1);
}
void shift8(uint16_t value) {
for (int i = 0; i < 8; i++) {
const uint8_t bit = (value & 0x80) != 0 ? 1 : 0;
if (DEBUG == 1) {
Serial.print(i);
Serial.print("=");
Serial.println(bit);
}
digitalWrite(PIN_SER, bit);
delayMicroseconds(1);
digitalWrite(PIN_SERCLK, 1);
delayMicroseconds(1);
digitalWrite(PIN_SERCLK, 0);
delayMicroseconds(1);
value <<= 1;
}
}