AVR Drivers: Difference between revisions
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USBASP details is obsolete - no longer applicable for the V2.0 version commonly available
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The programmer is 10 pins however which are set up | The programmer is 10 pins however which are set up one of two ways. | ||
Old Style: | |||
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[[File:Ribbon.jpg|thumb|The ribbon port at the end is disassembled and wire 8 is moved over to the 9th position]]So Wire 1 (MOSI) of the ribbon cable from the programmer must attach to Pin 5 of the Atmel. Make sure you mark which side of the clip attaches to the top of the Atmel or everything will be misaligned next time you use it. Line up RST and SCK with their appropriate wires. But notice that MISO on the programmer is Wire number 9 and the ribbon only has 8 wires. You will need to disassemble the end of the ribbon cable at the controller end and move wire 8 over to the 9 position so that MISO lines up correctly. | New Style, for the USBASP V2.0: | ||
{|class="wikitable" style="text-align: center; width: 400px;" | |||
|+ AVR Programmer ribbon wires | |||
|- | |||
!Pin !! Function !! Function !! Pin | |||
|- | |||
|1 || '''MOSI''' || VCC || 2 | |||
|- | |||
|3 || xxx || TXD || 4 | |||
|- | |||
|5 || '''RST''' || RXD || 6 | |||
|- | |||
|7 || '''SCK''' || GND || 8 | |||
|- | |||
|9 || '''MISO''' || '''GND''' || 10 | |||
|} | |||
[[File:Ribbon.jpg|thumb|Old Style: The ribbon port at the end is disassembled and wire 8 is moved over to the 9th position]]Old Style: So Wire 1 (MOSI) of the ribbon cable from the programmer must attach to Pin 5 of the Atmel. Make sure you mark which side of the clip attaches to the top of the Atmel or everything will be misaligned next time you use it. Line up RST and SCK with their appropriate wires. But notice that MISO on the programmer is Wire number 9 and the ribbon only has 8 wires. You will need to disassemble the end of the ribbon cable at the controller end and move wire 8 over to the 9 position so that MISO lines up correctly. | |||
Communication with the Atmel chip is via Serial Peripheral Interface (SPI, see [http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus Wikipedia article]) with the ISP programmer a Master and the Atmel on the driver board a Slave. SCK is Serial Clock so they are in sync. The ISP programmer talks on the MOSI line (Master Ouput, Slave Input) while the Atmel talks back on the MISO (Master Input, Slave Output) line. RST is reset. | Communication with the Atmel chip is via Serial Peripheral Interface (SPI, see [http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus Wikipedia article]) with the ISP programmer a Master and the Atmel on the driver board a Slave. SCK is Serial Clock so they are in sync. The ISP programmer talks on the MOSI line (Master Ouput, Slave Input) while the Atmel talks back on the MISO (Master Input, Slave Output) line. RST is reset. | ||