diff options
| -rw-r--r-- | notes/dac.txt | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/notes/dac.txt b/notes/dac.txt index e6c9b7b..3292936 100644 --- a/notes/dac.txt +++ b/notes/dac.txt @@ -1,15 +1,16 @@ - -DAC notes (for maple native and other "high density" STM32 devices) +DAC ------------------------------------------------------------------------------- -There is an ST application note for the DACs; it provides a lot of context but -doesn't help setup the peripheral very much. -For the first code iteration we'll just use 12-bit right-aligned single writes, -so use DAC_DHR12Rx +There is an ST application note for the DACs; it provides a lot of +context but doesn't help setup the peripheral very much. + +For the first code iteration we'll just use 12-bit right-aligned +single writes, or DAC_DHR12Rx. -Once data is loaded into the digital registers, there are a number of possible -triggers to start conversion to analog output: external interrupts, software -control, and timer events. We'll just use software triggering for now. +Once data is loaded into the digital registers, there are a number of +possible triggers to start conversion to analog output: external +interrupts, software control, and timer events. We'll just use +software triggering for now. There is (obviously) DMA support for DAC output. @@ -33,14 +34,14 @@ time, as follows: (10) Same triangle (11) Different triangle -Buffering will be enabled by default. +Buffering is enabled by default. -HOWTOs +Triangle Wave HOWTO ------------------------------------------------------------------------------- In order to generate a full-amplitude triangle wave: - - Make the following settings in dac->CR, for the DAC channel you + - Make the following settings in DAC_BASE->CR, for the DAC channel you want: set MAMP to 1011 (amplitude 4095), WAVE to 10 (triangle), TSEL to 111 (software trigger), TEN to 1 (trigger enabled), and EN to 1 (chanel enabled). @@ -57,10 +58,10 @@ or external line 9, by making appropriate settings to TSEL. TODO ------------------------------------------------------------------------------- -- sine wave demo using Timer interrupts -- wirish implementation -- documentation -- higher performance modes? -- signal quality testing -- DMA output +- Sine wave demo (using timer interrupts?) +- Wirish implementation +- Official docs +- Higher performance modes? +- Signal quality testing +- DMA output |