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driver(i2s): fix broken i2s adc mode

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1. Move i2s reset code from i2s_stop to i2s_start.
2. add RTC API to set sw mode for ADC
3. add description for adc_power_always_on()
4. add lock for i2s dma and RTC ADC functions.
5. add ADC read task in example

reported from bbs:  https://esp32.com/viewtopic.php?f=13&t=3490&p=17522#p17522
reported from github: https://github.com/espressif/esp-idf/issues/1333
This commit is contained in:
Wangjialin
2017-12-08 20:07:19 +08:00
parent 475ffe78e8
commit 451f69cc2e
7 changed files with 242 additions and 32 deletions
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1
components/soc/esp32/include/soc/sens_reg.h
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@@ -96,6 +96,7 @@
#define SENS_FORCE_XPD_SAR_M ((SENS_FORCE_XPD_SAR_V)<<(SENS_FORCE_XPD_SAR_S))
#define SENS_FORCE_XPD_SAR_V 0x3
#define SENS_FORCE_XPD_SAR_S 18
#define SENS_FORCE_XPD_SAR_SW_M (BIT1)
#define SENS_FORCE_XPD_SAR_FSM 0 // Use FSM to control power down
#define SENS_FORCE_XPD_SAR_PD 2 // Force power down
#define SENS_FORCE_XPD_SAR_PU 3 // Force power up