README

Author: pschatzmann

README.md

@@ -51,12 +51,14 @@ Below I demonstrate the basic API provided by this library. However, I recommend
 #include "AudioTools.h"
 #include "stm32-i2s.h"
 
+using namespace stm32_i2s;
+
 SineWaveGenerator<int16_t> sineWave(32000);   // subclass of SoundGenerator with max amplitude of 32000
 I2SSettingsSTM32 i2s_settings;
 int sample_rate = 8000;
 int channels = 1;
 
-void readToTransmit(uint8_t *buffer, uint16_t byteCount) {
+void readToTransmit(uint8_t *buffer, uint16_t byteCount, void*) {
 	uint16_t samples = byteCount / 2;
 	int16_t *buffer_16 = (int16_t*) buffer;
 	for (uint j = 0; j < samples; j+=2) {
@@ -67,14 +69,16 @@ void readToTransmit(uint8_t *buffer, uint16_t byteCount) {
 }
 
 void setup() {
+	Serial.begin(115200);
 	sineWave.begin(channels, sample_rate, N_B4);
 	i2s_settings.sample_rate = I2S_AUDIOFREQ_8K;
-	I2S.startI2STransmit(&i2s_settings, readToTransmit);
+	if (!I2S.beginWriteDMA(i2s_settings, readToTransmit)){
+		Serial.println("I2S Error");
+	}
 }
 
-void loop() {
+void loop() {}
 
-}
 ```
 
 
@@ -84,21 +88,24 @@ void loop() {
 #include "AudioTools.h"
 #include "stm32-i2s.h"
 
+using namespace stm32_i2s;
+
 CsvStream<int16_t> out(Serial, 2); // ASCII output stream 
 I2SSettingsSTM32 i2s_settings;
 
-void writeFromReceive(uint8_t *buffer, uint16_t byteCount){
+void writeFromReceive(uint8_t *buffer, uint16_t byteCount, void*){
 	out.write(buffer, byteCount);
 }
 
 void setup() {
+	Serial.begin(115200);
 	i2s_settings.sample_rate = I2S_AUDIOFREQ_8K;
-	I2S.startI2SReceive(&i2s_settings, writeFromReceive, I2S_BUFFER_SIZE);
+	if (!I2s.beginReadDMA(i2s_settings, writeFromReceive){
+		Serial.println("I2S Error");
+	}
 }
 
-void loop() {
-
-}
+void loop() {}
 
 ```