oric_dan:
Thanks in regards the datacode. So I have chips from a fairly recent batch.Also am using the 1284 rather than 1284P. Maybe it's the 'P' pico-power version that
has the RX0 sensitivity problem, as I figure draping the RX0 line around the xtal pins
like I did should aggravate any noise issues, but uploads are solid. I plan to get some
1284P chips soon to try.Does anyone know of a very large sketch I could try uploading? For my 32KB sketch, I
just created a humungus initialized data array, clearly far over the RAM size for the
chip.Funny you should ask, I just posted such a sketch yesterday in preping for such a 1284P test. I haven't
worked out the correct value to use for arraysize variable for use with the 1284P but I'm sure with the comments you can work it out close enough. See code below.One other question - there was talk on some of the other threads about Arduino-central
producing a standard pinout for 1284P chips. Is that a possiblility?Where was that posted, have a link?
#include <avr/pgmspace.h> //To store arrays into flash rather then SRAM
// Simple sketch to create large sketch sizes for testing purposes
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;
/*
Make arraysize = to 1500 for 328P chip, 4000 for 1280P chip?,
3600 for 644P chip, xxxx for 1284P, etc.
*/
const int arraysize= 1500; // value to mostly fill avalible flash capacity
long myInts0[arraysize] PROGMEM = {}; //Store initilized array into flash memory
long myInts1[arraysize] PROGMEM = {};
long myInts2[arraysize] PROGMEM = {};
long myInts3[arraysize] PROGMEM = {};
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
int i = random(0,arraysize); // Work around any optimization for constant values
Serial.print(myInts0[i]); // Access some random element so the array can't be optimized away.
Serial.print(myInts1[i]); // Access some random element so the array can't be optimized away.
Serial.print(myInts2[i]); // Access some random element so the array can't be optimized away.
Serial.print(myInts3[i]); // Access some random element so the array can't be optimized away.
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
Lefty