i want to write and read the eeprom (AT93c465) via USB from my PC.
i'm using v-usb last update, in the source i'm confused how to edit the source so i can write and read the eeprom (AT93c46) from PC via USB PORT using SPI comunication in ATMEGA16..
please help me on the source bellow :
main.c on D:\vusb-20100715\examples\hid-data\firmware
uchar usbFunctionRead(uchar *data, uchar len)
{
if(len > bytesRemaining)
len = bytesRemaining;
eeprom_read_block(data, (uchar *)0 + currentAddress, len); //how to change this line, so i can read the EEPROM from PC via USB Port
currentAddress += len;
bytesRemaining -= len;
return len;
}
/* usbFunctionWrite() is called when the host sends a chunk of data to the
* device. For more information see the documentation in usbdrv/usbdrv.h.
*/
uchar usbFunctionWrite(uchar *data, uchar len)
{
if(bytesRemaining == 0)
return 1; /* end of transfer */
if(len > bytesRemaining)
len = bytesRemaining;
eeprom_write_block(data, (uchar *)0 + currentAddress, len); //how to change this line, so i can write the EEPROM from PC via USB Port
currentAddress += len;
bytesRemaining -= len;
return bytesRemaining == 0; /* return 1 if this was the last chunk */
}
and this my block diagram of my project :
PC to ATMEGA16 using USB, ATMEGA to EEPROM (AT93C46) module using SPI PORT
Statistics: Posted by ardiansyah_mrit — Mon Oct 10, 2011 5:26 am
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