#include <nitro/spi.h>MICResult MIC_StartAutoSampling(
const MICAutoParam* param );| param | Pointer to a MICAutoParam-type auto-sampling settings structure. |
Returns the processing result as a MICResult enumerated type. Returns MIC_RESULT_SUCCESS if processing completed successfully; returns some other value if the process failed.
Starts microphone auto-sampling. Use the PM_SetAmp* function to turn on the programmable gain amp before sampling.
This function issues a request to the ARM7 processor to start auto-sampling, waits for ARM7 to respond, and returns the process result. This is a synchronous version of the MIC_StartAutoSamplingAsync function. Where the input volume exceeds the minimum or maximum value, the output data will be clamped. It is possible to use the PM_SetAmpGain* functions to adjust the input volume that can be sampled.
This function returns MIC_RESULT_INVALID_COMMAND when the CODEC is running in CODEC-TWL mode because auto-sampling cannot be run at an arbitrary frequency in CODEC-TWL mode. In other words, this function can be used only when the CODEC is running in CODEC-DS mode.
This function waits for a PXI interrupt for synchronization purposes. Do not call it when PXI interrupts are prohibited.
It is possible to operate other ARM7 processor peripherals (SPI device) during microphone auto-sampling. However, note that if another SPI device had taken over the access for a long time, the microphone would keep returning a certain value during that time.
MIC_StartAutoSampling
MIC_StopAutoSampling
MIC_AdjustAutoSampling
PM_SetAmpGain
2009/06/25 Added description of using the PM_SetAmp* function.
2009/05/14 Added the TWL icon and a description related to CODEC.
2008/01/09 Revised a description of differences in behavior due to CODEC mode.
2007/11/17 Added a description of operations on the TWL platform.
2005/03/08 Standardized the Japanese notation of the term for "interrupt."
2005/01/11 Revised return values, revised the description and added reference functions.
2004/09/17 Changed the type of the param argument.
2004/08/10 Added explanations related to input volume and touch panel sampling during microphone auto-sampling.
2004/06/01 Initial version.
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