Hi gents, absolute newby needs some hints. I've got an AVR32-Board by Alvidi (AVR32-Modul AL-UC3AEB). see http://alvidi.de/avr32_module.html Atmel AT32UC3A1512: http://www.atmel.com/dyn/products/product_card.asp?part_id=4122 ->PDF: www.atmel.com/dyn/resources/prod_documents/doc32058.pdf ->TQFP100 Package (page 44/45) TQFP100 PIN GPIO Pin Function A 83 PA29 GPIO 29 TWI - SDA 84 PA30 GPIO 30 TWI - SCL So I have to use PortA Pin 29 and 30 for TWI communication. Right? -------------------------------------- I want to send some bytes to a MAXIM6959 7-Segment-Driver using TWI/I²C. see http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3638 ->PDF: http://datasheets.maxim-ic.com/en/ds/MAX6958-MAX6959.pdf ->MAX6958BAPE+: Slave Adress 0111001 (page 17) ->Display test mode 0x07, LSB to 1 (page 16) First step: I want basically reach something like "Set MAXIM to 'Display test mode": // device addresses #define MAX6959BAPE 0x39 #define Display_test_mode 0x07 // initialize I2C library i2c_init(); // set device address and write mode i2c_start_wait(MAX6959BAPE+I2C_WRITE); // go! i2c_write(Display_test_mode); i2c_write(1); // set stop conditon, release bus i2c_stop(); Did search many many times the forum and our friend google, didn't find anything. Wasn't able to adapt the Master/Slave-EEPROM-example of AVR32-Studio's tutorials, either. It's an example, it's a concept, that 'i2c_...' are dummy functions, which maybe show what I think the way could be. Don't know how to write it en detail. Isn't there such a generic example out there? Hope someone can help. regards, Ernest