leaflabsandy
Member
Platform: Windows XP SP3
Device: Maple Rev. 3
Version: 0.5.0
Arduino command micros(); does not compile
Code:
unsigned long x = 0;
void setup() {
}
void loop() {
x = micros();
}
/*
Error compiling.
o: In function `loop()':
C:\DOCUME~1\HP_ADM~1.H_A\LOCALS~1\Temp\build1057735889285767359.tmp/BareMinumum1.cpp:13: undefined reference to `micros'
collect2: ld returned 1 exit status
*/
Actually I don't think we do... the closest functionality is delayMicroseconds(). This would be difficult to implement because millis() is implemented using the SysTick peripheral which calls an interrupt once every millisecond. I'm not sure if there's a cycle counter hidden away somewhere that I don't know about (I think that's how the function is implemented on AVRs) but if not I don't see a good way to implement this functionality. I think the Timer objects will provide a solution for pretty much any case that would require micros(), but not having micros() will probably make porting some libraries a huge pain.
I'll update the documentation once I confirm all this.
BTW leaflabsandy, does your unit test program display a success rate? What coverage are we at, 80%? 90%?
leaflabsandy
Member
No success rate.
Coverage > 95% ... considering the Arduino from 2005 took 5 years to reach rev. 18 and it took only several months for Leaflabs, then you guys are looking good.
Here is my running list of the problems I found, so far. <--- close your eyes on this one.
#1. Goto command example does not work also
color change on this keyword does not change.
Note: This is an Arduino problem.
The keyword color change is Leaflab's problem.
#2. "word" does not compile.
#3. sizeof() keyword color does not change.
#4. pow() keyword color does not change.
#5. Serialx.flush() does not work for all three serial ports.
#6. Interrupts command(s) does not work.
#7. SerialUSB.print() does not work on the serial monitor in windows xp.
#8. micros() command does not compile.
#9. GPIO mode additional keywords do not change color.
OUTPUT_OPEN_DRAIN, INPUT_FLOATING, INPUT_PULLUP,
INPUT_PULLDOWN, INPUT_ANALOG & PWM
#10. Cannot determine the ram usage in a sketch. Both the flash total and
data are always the same. (win xp sp3)
#11. No "out of bounds" baud rate error checking on the serial.begin(baud); command.
Note: There are different baud rate maximum(s) on different serial ports.
I am almost finished testing except for the analog I/O and shiftOut.
Also, tone,noTone,pulseIn are "work in progress" LOL
perry
Administrator
Hi guys,
Please bear with us. I'll try to deal with each issue as I get to it. I'm sorry about the delay, I have a day job and very little time to work on this in my spare time :*(
As always, patches are always encouraged, we're trying to encourage a true open source project here...
perry
Administrator
perry
Administrator
We've been tracking issues internally, feel free to post issues on github and we'll update as necessary.
As an update...
#1. Color fixed
#3. Color fixed
#4. Color fixed
#6. Noted in docs
#8. Noted in docs
#9. Color fixed
These changes should appear in 0.0.6
Has anybody who was having trouble with SerialUSB under XP tried the 0.0.6 IDE? Success/Failure? It worked in our testing, though I think it worked last time as well.
leaflabsandy
Member
Quote: "Has anybody who was having trouble with SerialUSB under XP tried the 0.0.6 IDE?"
Works for me.
Quote: It worked in our testing, though I think it worked last time as well.
It probably worked on the other platforms last time (0.5.0) but never on the XP platform
for me.
Awesome!
gbulmer
Moderator
Excellent news on fixing SerialUSB on XP. Well done. That is very pleasing.
On a different subject, I wonder if I am missing something about the Systick timer? I am interested in fixing micros().
In document 13587 (STM32F103x8/xB, "Medium-density performance line ARM-based 32-bit MCU ..."), it says:
"SysTick timer
This timer is dedicated for OS, but could also be used as a standard downcounter. It
features:
● A 24-bit downcounter
● Autoreload capability
● Maskable system interrupt generation when the counter reaches 0
● Programmable clock source"
The 24-bit downcounter might be visible, but I haven't found any further useful information.
I looked in document 13902 (RM0008 Reference manual), and the only information I can find it says is
"9.1.1 SysTick calibration value register
The SysTick calibration value is set to 9000, which gives a reference time base of 1ms with
the SysTick clock set to 9 MHz (max HCLK/8)."
Which sounds like other values could be set (and why use a 24-bit downcounter to count down from 9000, unless it can?)
I've also tried searching ST.COM looking for Systick, and didn't find anything helpful.
Any suggestions where I might find more information?
I use micros() quite a lot in some Arduino code, so I am interested in digging around to fix it on Maple (in my 473uSec of spare time :-)
GB
You must log in to post.
