Outputs to ESP32 DAC through the ULP (Ultra> Low Power coprocessor), freeing I2S for other uses. Connect left channel on pin 25 Connect right channel on pin 26. More...
#include <AudioESP32ULP.h>
Inheritance diagram for AudioESP32ULP:
Public Member Functions | |
| virtual void | addNotifyAudioChange (AudioInfoSupport &bi) |
| Adds target to be notified about audio changes. | |
| virtual AudioInfo | audioInfo () override |
| provides the actual input AudioInfo | |
| virtual AudioInfo | audioInfoOut () |
| provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream | |
| int | availableForWrite () |
| virtual bool | begin () |
| bool | begin (AudioInfo info) |
| Starts the processing. I the output is mono, we can determine the output pin by selecting DAC1 (gpio25) or DAC2 (gpio26) | |
| virtual void | clearNotifyAudioChange () |
| Deletes all change notify subscriptions. | |
| AudioInfo | defaultConfig () |
| void | end () |
| virtual void | flush () override |
| virtual bool | isDeletable () |
| If true we need to release the related memory in the destructor. | |
| bool | isNotifyActive () |
| Checks if the automatic AudioInfo update is active. | |
| operator bool () | |
| virtual bool | removeNotifyAudioChange (AudioInfoSupport &bi) |
| Removes a target in order not to be notified about audio changes. | |
| virtual void | setAudioInfo (AudioInfo newInfo) override |
| Defines the input AudioInfo. | |
| void | setMinWriteBytes (int bytes) |
| Selects the limit for the availableForWrite to report the data. | |
| void | setMonoDAC (UlpDac dac) |
| Selects the DAC when we have a mono signal. | |
| void | setNotifyActive (bool flag) |
| Deactivate/Reactivate automatic AudioInfo updates: (default is active) | |
| size_t | write (const uint8_t *data, size_t len) |
| virtual size_t | write (uint8_t ch) override |
| virtual void | writeSilence (size_t len) |
Protected Member Functions | |
| uint32_t | create_I_BXI (uint32_t imm_pc) |
| uint32_t | create_I_WR_REG (uint32_t reg, uint32_t low_bit, uint32_t high_bit, uint32_t val) |
| void | notifyAudioChange (AudioInfo info) |
| bool | setup () |
| bool | writeFrame (int16_t sample[2]) |
Protected Attributes | |
| int | _timeout = 10 |
| int | activeDACs = 3 |
| uint8_t | bufferedOddSample = 128 |
| const uint32_t | bufferStart = indexAddress + 1 |
| AudioInfo | cfg |
| const uint32_t | dacTableStart1 = 2048 - 512 |
| const uint32_t | dacTableStart2 = dacTableStart1 - 512 |
| int | hertz |
| const uint32_t | indexAddress = opcodeCount |
| bool | is_active = false |
| bool | is_notify_active = true |
| int | lastFilledWord = 0 |
| int | min_write_bytes = 128 |
| Vector< AudioInfoSupport * > | notify_vector |
| const int | opcodeCount = 20 |
| UlpDac | selected_mono_dac = ULP_DAC1 |
| bool | stereoOutput = true |
| SingleBuffer< uint8_t > | tmp {MAX_SINGLE_CHARS} |
| int | tmpPos = 0 |
| const int | totalSamples = totalSampleWords * 2 |
| uint32_t | totalSampleWords |
| bool | waitingOddSample = true |
Detailed Description
Outputs to ESP32 DAC through the ULP (Ultra> Low Power coprocessor), freeing I2S for other uses. Connect left channel on pin 25 Connect right channel on pin 26.
- Version
- 0.1
- Date
- 2023-03-26
- Copyright
- (C) 2020 Martin Laclaustra, based on bitluni's code
Member Function Documentation
◆ writeSilence()
|
inlinevirtualinherited |
Writes n 0 values (= silence)
- Parameters
-
len
Member Data Documentation
◆ totalSampleWords
|
protected |
Initial value:
=
2048 - 512 - 512 - (opcodeCount + 1)
The documentation for this class was generated from the following file:
- src/AudioLibs/AudioESP32ULP.h
