Fix I2S reported rate for 24b mode (esp8266#7838)

earlephilhower · web-flow · commit 349e67f7f527 · 2021-01-24T09:59:20.000-08:00
Adjust the number of bittimes when returning the real I2S rate.
diff --git a/cores/esp8266/core_esp8266_i2s.cpp b/cores/esp8266/core_esp8266_i2s.cpp
@@ -502,7 +502,7 @@ void i2s_set_dividers(uint8_t div1, uint8_t div2) {
 }
 
 float i2s_get_real_rate(){
-  return (float)I2SBASEFREQ/32/((I2SC>>I2SBD) & I2SBDM)/((I2SC >> I2SCD) & I2SCDM);
+  return (float)I2SBASEFREQ/(_i2s_bits * 2)/((I2SC>>I2SBD) & I2SBDM)/((I2SC >> I2SCD) & I2SCDM);
 }
 
 bool i2s_rxtx_begin(bool enableRx, bool enableTx) {

Original file line number	Diff line number	Diff line change
`@@ -502,7 +502,7 @@ void i2s_set_dividers(uint8_t div1, uint8_t div2) {`
`502`	`502`	`}`
`503`	`503`
`504`	`504`	`float i2s_get_real_rate(){`
`505`		`- return (float)I2SBASEFREQ/32/((I2SC>>I2SBD) & I2SBDM)/((I2SC >> I2SCD) & I2SCDM);`
	`505`	`+ return (float)I2SBASEFREQ/(_i2s_bits * 2)/((I2SC>>I2SBD) & I2SBDM)/((I2SC >> I2SCD) & I2SCDM);`
`506`	`506`	`}`
`507`	`507`
`508`	`508`	`bool i2s_rxtx_begin(bool enableRx, bool enableTx) {`