bits manipulation (BME)

silviopistolesi — Tue, 11 Jun 2013 16:43:13 GMT

i must read a word of 16 bits from PORTC to load in memory buffer but the PORTC haven't bit 14 and 15 but 16 and 17. For format the word in 16 bit I make in the folloving mode:

read_data = FGPIOC_PDIR;

tmp = read_data & 0x00030000;

tmp = tmp >> 2;

read_data = read_data | tmp;

There is an other mode (less instructions and/or faster) for to do the same operations?

Re: bits manipulation (BME)

Paul_Tian — Tue, 25 Jun 2013 02:44:39 GMT

Hi, Silvio

After compared with our BME sample code, I think your code is OK. After convertion to assembly code, the instruction lines are same.

Hope my reply can help you.

Best Regards

Paul

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bits manipulation (BME)

Re: bits manipulation (BME)