I am not sure what is going on here, but I am writing a program to interface a spectrometer CCD sensor using a Teensy 3.6.
I am able to get the integration timer, clocks, waveforms, interrupts, etc working perfectly. I even have the ADC setup and tested.
My plan was to trigger the ADC from FTM2 CH0 output via the PDB in bypass mode as a timed trigger. I started coding the PDB setup function, but whenever I touch any PDB register, the Teensy 3.6 just locks.
If I try any read or write to any PDB register, the program loop just stops running.
I tried every single PDB register with the same result - lock / FAIL.
Below is the problem to the simplest case.
The problem repeats with this simple program for me every time.
//*************** This Locks *********************
void setup() {
Serial.begin(9600);
}
void loop() {
uint32_t debug;
Serial.println(123);
debug=PDB0_SC; // this line locks the program
Serial.println(456);
}
The output is:
123...locks
//************* This runs *********************
Comment out the read PDB0_SC thusly:
void setup() {
Serial.begin(9600);
}
void loop() {
uint32_t debug;
Serial.println(123);
//debug=PDB0_SC; //comment out this line
Serial.println(456);
}
The output is:
123
456
123
456...and so on
//****************************************
Reading or writing to any PDB register causes a lockup regardless of value
I am running Arduino 1.8.10 / Teensyduino 1.4.8 / Windows 10
It looks like others are using the PDB successfully with Teensy 3.6, so I suspect its either something particular about my setup, or a very recent bug.
-tnx jim
I am able to get the integration timer, clocks, waveforms, interrupts, etc working perfectly. I even have the ADC setup and tested.
My plan was to trigger the ADC from FTM2 CH0 output via the PDB in bypass mode as a timed trigger. I started coding the PDB setup function, but whenever I touch any PDB register, the Teensy 3.6 just locks.
If I try any read or write to any PDB register, the program loop just stops running.
I tried every single PDB register with the same result - lock / FAIL.
Below is the problem to the simplest case.
The problem repeats with this simple program for me every time.
//*************** This Locks *********************
void setup() {
Serial.begin(9600);
}
void loop() {
uint32_t debug;
Serial.println(123);
debug=PDB0_SC; // this line locks the program
Serial.println(456);
}
The output is:
123...locks
//************* This runs *********************
Comment out the read PDB0_SC thusly:
void setup() {
Serial.begin(9600);
}
void loop() {
uint32_t debug;
Serial.println(123);
//debug=PDB0_SC; //comment out this line
Serial.println(456);
}
The output is:
123
456
123
456...and so on
//****************************************
Reading or writing to any PDB register causes a lockup regardless of value
I am running Arduino 1.8.10 / Teensyduino 1.4.8 / Windows 10
It looks like others are using the PDB successfully with Teensy 3.6, so I suspect its either something particular about my setup, or a very recent bug.
-tnx jim