yoshinari kou
/
TEST_WW_SPI_CS
White Wizard SPI Chip Select test program. I changed chip select signal timing.
Diff: wwChipSelect.cpp
- Revision:
- 0:1d2148b42390
- Child:
- 1:048ae028f72d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wwChipSelect.cpp Mon Jul 25 10:00:33 2011 +0000 @@ -0,0 +1,42 @@ +//Nest Egg Inc. +//http://nestegg.jp/ +//White Wizard Board SPI Chip Select Code +//Auther : Yoshinari kou +//2010/10/03 + +#include "wwChipSelect.h" + +wwChipSelect :: wwChipSelect(PinName cs): + ChipSelect(cs){ + } + +void wwChipSelect :: wwCSwrite(int ch){ + //start + ChipSelect.write(1); + wait_us(20); + + ChipSelect.write(0); + + wait_us(26);//26 + +//A1 + ChipSelect.write(0x01 & ch); + wait_us(20);//46 + +//A2 + ChipSelect.write((0x02 & ch)>>1); + wait_us(20);//66 + +//A3 + ChipSelect.write((0x04 & ch)>>2); + wait_us(20);//86 + +//A4 + ChipSelect.write((0x08 & ch)>>3); + wait_us(20);//106 + + ChipSelect.write(1); + +} + +