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Update I2S base frequency and frequency dividers to real ones (#4031)

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* Fix I2S base frequency
* Update frequency dividers for I2S
Reference: https://github.com/espressif/ESP8266_MP3_DECODER/blob/master/mp3/driver/i2s_freertos.c
* fixed i2s_set_rate, added i2s_get_real_rate() and i2s_set_dividers
* Minimise float calculations
This commit is contained in:
Kristijan Gjoshev
2018-01-21 00:58:42 +01:00
committed by Earle F. Philhower, III
parent 38fe6fc488
commit 0fe725909e
3 changed files with 35 additions and 5 deletions
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cores/esp8266/esp8266_peri.h
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@ -754,7 +754,7 @@ extern uint8_t esp8266_gpioToFn[16];
#define i2c_bbpll_en_audio_clock_out_msb 7
#define i2c_bbpll_en_audio_clock_out_lsb 7
#define I2S_CLK_ENABLE() i2c_writeReg_Mask_def(i2c_bbpll, i2c_bbpll_en_audio_clock_out, 1)
#define I2SBASEFREQ (12000000L)
#define I2SBASEFREQ (160000000L)
#define I2STXF ESP8266_REG(0xe00) //I2STXFIFO (32bit)
#define I2SRXF ESP8266_REG(0xe04) //I2SRXFIFO (32bit)