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Diffstat (limited to 'docs')
| -rw-r--r-- | docs/library/pyb.DAC.rst | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/docs/library/pyb.DAC.rst b/docs/library/pyb.DAC.rst index 5d4771a17..578a4d126 100644 --- a/docs/library/pyb.DAC.rst +++ b/docs/library/pyb.DAC.rst @@ -64,6 +64,16 @@ Methods Initiates a burst of RAM to DAC using a DMA transfer. The input data is treated as an array of bytes (8 bit data). + ``freq`` can be an integer specifying the frequency to write the DAC + samples at, using Timer(6). Or it can be an already-initialised + Timer object which is used to trigger the DAC sample. Valid timers + are 2, 4, 5, 6, 7 and 8. + ``mode`` can be ``DAC.NORMAL`` or ``DAC.CIRCULAR``. - - TIM6 is used to control the frequency of the transfer. + + Example using both DACs at the same time:: + + dac1 = DAC(1) + dac2 = DAC(2) + dac1.write_timed(buf1, pyb.Timer(6, freq=100), mode=DAC.CIRCULAR) + dac2.write_timed(buf2, pyb.Timer(7, freq=200), mode=DAC.CIRCULAR) |