Mc-avr-notes: Unterschied zwischen den Versionen
Aus SpaceOnEarth
h_>Axel K (Textersetzung - „ * “ durch „* “) |
Axel (Diskussion | Beiträge) K (1 Version importiert) |
(kein Unterschied)
| |
Aktuelle Version vom 4. April 2022, 15:35 Uhr
I_UfE_AVR
usbprog
- USBPROG homepage http://www.embedded-projects.net/usbprog
installation
apt-get install libusb libxml libcurl libcurl-dev wxWidgets
- libusb to access the device,
- libxml to parse the firmware descriptions,
- libcurl libcurl-dev to download the firmware,readline toj simplify editing of the command line (in the CLI version),
- wxWidgets, if you want to compile also the GUI version and
- $ ./configure
- $ make
- $ su
- $ make install
Rechte für den Adapter
if you want to use the usbprog-gui for firmware change as normal user and not as root only on a recent Linux system using udev, you can tell udev do modify permissions accordingly.
To configure udev, create a file named /etc/udev/rules.d/80-usbprog.rules with the content Code:
SYSFS{idVendor}=="03eb", SYSFS{idProduct}=="2104", GROUP="ufe", MODE="0660"
programmier Tips
AXOS geht nicht mehr/ Codelänge--ag 10:24, 28 April 2009 (UTC)
wenn man gcc option -O2 wegläßt (bzw -O0 wählt) funktioniert das axos nicht mehr.
-O2 ergab bei meinem Testprogramm den kürzesten code
How do I use a #define'd constant in an asm statement?--ag 15:14, 5 April 2009 (UTC)
eg works:
asm volatile("sbi 0x18,0x07;");
Which works. When you do the same thing but replace the address of the port by its macro name, like this:
asm volatile("sbi PORTB,0x07;");
you get a compilation error: "Error: constant value required".
PORTB is a precompiler definition included in the processor specific file included in avr/io.h. As you may know, the precompiler will not touch strings and PORTB, instead of 0x18, gets passed to the assembler. One way to avoid this problem is:
asm volatile("sbi %0, 0x07" : "I" (_SFR_IO_ADDR(PORTB)):);
Note:
For C programs, rather use the standard C bit operators instead, so the above would be expressed as PORTB |= (1 << 7). The optimizer will take care to transform this into a single SBI instruction, assuming the operands allow for this.
Ethernet
- http://www.watterott.com/de/WIZnet-WIZ812MJ-Ethernet-Modul
- ethernet http://www.mikrocontroller.net/articles/ENC28J60#Hardware
