Posted on May 17, 2011 at 13:20Have you checked your input impedance? The datasheet has a formula for max Rain. It depends on your frequency, but with 7.5 cycle samples impedance needs to be pretty low.
Posted on May 17, 2011 at 13:19Sorry for late response. The place where the crc is initialized is actually in crc16() Code:u16 crc16(const u8 *p, int len) { int i; u16 crc = 0; for (i=0; i<len; i++) crc = crc16_ccitt(crc, p[i]); return crc; } H...
Posted on May 17, 2011 at 13:19Thanks for the response. That SD card SPI project doesn't appear to use the hardware CRC. There is a software CRC16-CCITT function, but it still uses init value of 0. I can always calculate CRC in code, but it'd be a s...
Posted on May 17, 2011 at 13:19Just starting to use this micro and I don't see a way to change the init values for CRC calculation on SPI. They are initialized to 0x0000 and the registers are read only. I'd prefer to be able to move the blind spot f...
