Page 334 - ARM Based Microcontroller Projects Using MBED
P. 334
320 12. SPI BUS PROJECTS
FIG. 12.5 Project constructed on a breadboard.
BEGIN/MAIN
Define the SPI bus interface
Set signal amplitude to 1V
DO FOREVER
CALL DAC (amplitude)
Wait 0.5ms
CALL DAC (0V)
Wait 0.5ms
ENDDO
END/MAIN
BEGIN/DAC(amplitude)
Send HIGH byte
Send LOW byte
END/DAC
FIG. 12.6 Program PDL.
