Add AudioInputTDM

Audio.h

 #include "input_adcs.h"
 #include "input_i2s.h"
 #include "input_i2s_quad.h"
+#include "input_tdm.h"
 #include "mixer.h"
 #include "output_dac.h"
 #include "output_dacs.h"

input_tdm.cpp

+/* Audio Library for Teensy 3.X
+ * Copyright (c) 2017, Paul Stoffregen, paul@pjrc.com
+ *
+ * Development of this audio library was funded by PJRC.COM, LLC by sales of
+ * Teensy and Audio Adaptor boards.  Please support PJRC's efforts to develop
+ * open source software by purchasing Teensy or other PJRC products.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, development funding notice, and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "input_tdm.h"
+#include "output_tdm.h"
+#if defined(KINETISK)
+
+DMAMEM static uint32_t tdm_rx_buffer[AUDIO_BLOCK_SAMPLES*16];
+audio_block_t * AudioInputTDM::block_incoming[16] = {
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+};
+bool AudioInputTDM::update_responsibility = false;
+DMAChannel AudioInputTDM::dma(false);
+
+
+void AudioInputTDM::begin(void)
+{
+	dma.begin(true); // Allocate the DMA channel first
+
+	// TODO: should we set & clear the I2S_RCSR_SR bit here?
+	AudioOutputTDM::config_tdm();
+
+	CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
+	dma.TCD->SADDR = &I2S0_RDR0;
+	dma.TCD->SOFF = 0;
+	dma.TCD->ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2);
+	dma.TCD->NBYTES_MLNO = 4;
+	dma.TCD->SLAST = 0;
+	dma.TCD->DADDR = tdm_rx_buffer;
+	dma.TCD->DOFF = 4;
+	dma.TCD->CITER_ELINKNO = sizeof(tdm_rx_buffer) / 4;
+	dma.TCD->DLASTSGA = -sizeof(tdm_rx_buffer);
+	dma.TCD->BITER_ELINKNO = sizeof(tdm_rx_buffer) / 4;
+	dma.TCD->CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
+	dma.triggerAtHardwareEvent(DMAMUX_SOURCE_I2S0_RX);
+	update_responsibility = update_setup();
+	dma.enable();
+
+	I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
+	I2S0_TCSR |= I2S_TCSR_TE | I2S_TCSR_BCE; // TX clock enable, because sync'd to TX
+	dma.attachInterrupt(isr);
+}
+
+// TODO: needs optimization...
+static void memcpy_tdm_rx(uint32_t *dest1, uint32_t *dest2, const uint32_t *src)
+{
+	uint32_t i, in1, in2;
+
+	for (i=0; i < AUDIO_BLOCK_SAMPLES/2; i++) {
+		in1 = *src;
+		in2 = *(src+8);
+		src += 16;
+		*dest1++ = (in1 >> 16) | (in2 & 0xFFFF0000);
+		*dest2++ = (in1 << 16) | (in2 & 0x0000FFFF);
+	}
+}
+
+void AudioInputTDM::isr(void)
+{
+	uint32_t daddr;
+	const uint32_t *src;
+	unsigned int i;
+
+	//digitalWriteFast(3, HIGH);
+	daddr = (uint32_t)(dma.TCD->DADDR);
+	dma.clearInterrupt();
+
+	if (daddr < (uint32_t)tdm_rx_buffer + sizeof(tdm_rx_buffer) / 2) {
+		// DMA is receiving to the first half of the buffer
+		// need to remove data from the second half
+		src = &tdm_rx_buffer[AUDIO_BLOCK_SAMPLES*8];
+	} else {
+		// DMA is receiving to the second half of the buffer
+		// need to remove data from the first half
+		src = &tdm_rx_buffer[0];
+	}
+	if (block_incoming[0] != NULL) {
+		for (i=0; i < 16; i += 2) {
+			uint32_t *dest1 = (uint32_t *)(block_incoming[i]->data);
+			uint32_t *dest2 = (uint32_t *)(block_incoming[i+1]->data);
+			memcpy_tdm_rx(dest1, dest2, src);
+			src++;
+		}
+	}
+	if (update_responsibility) update_all();
+	//digitalWriteFast(3, LOW);
+}
+
+
+void AudioInputTDM::update(void)
+{
+	unsigned int i, j;
+	audio_block_t *new_block[16];
+	audio_block_t *out_block[16];
+
+	// allocate 16 new blocks.  If any fails, allocate none
+	for (i=0; i < 16; i++) {
+		new_block[i] = allocate();
+		if (new_block[i] == NULL) {
+			for (j=0; j < i; j++) {
+				release(new_block[j]);
+			}
+			memset(new_block, 0, sizeof(new_block));
+			break;
+		}
+	}
+	__disable_irq();
+	memcpy(out_block, block_incoming, sizeof(out_block));
+	memcpy(block_incoming, new_block, sizeof(block_incoming));
+	__enable_irq();
+	if (out_block[0] != NULL) {
+		// if we got 1 block, all 16 are filled
+		for (i=0; i < 16; i++) {
+			transmit(out_block[i], i);
+			release(out_block[i]);
+		}
+	}
+}
+
+
+#endif // KINETISK

input_tdm.h

+/* Audio Library for Teensy 3.X
+ * Copyright (c) 2017, Paul Stoffregen, paul@pjrc.com
+ *
+ * Development of this audio library was funded by PJRC.COM, LLC by sales of
+ * Teensy and Audio Adaptor boards.  Please support PJRC's efforts to develop
+ * open source software by purchasing Teensy or other PJRC products.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, development funding notice, and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef _input_tdm_h_
+#define _input_tdm_h_
+
+#include "Arduino.h"
+#include "AudioStream.h"
+#include "DMAChannel.h"
+
+class AudioInputTDM : public AudioStream
+{
+public:
+	AudioInputTDM(void) : AudioStream(0, NULL) { begin(); }
+	virtual void update(void);
+	void begin(void);
+protected:	
+	static bool update_responsibility;
+	static DMAChannel dma;
+	static void isr(void);
+private:
+	static audio_block_t *block_incoming[16];
+};
+
+#endif

keywords.txt

 AudioInputI2S	KEYWORD2
 AudioInputI2SQuad	KEYWORD2
 AudioInputI2Sslave	KEYWORD2
+AudioInputTDM	KEYWORD2
 AudioInputUSB	KEYWORD2
 AudioOutputI2S	KEYWORD2
 AudioOutputI2SQuad	KEYWORD2

output_tdm.cpp

 }
 
 // TODO: needs optimization...
-static void memcpy_tdm(uint32_t *dest, const uint32_t *src1, const uint32_t *src2)
+static void memcpy_tdm_tx(uint32_t *dest, const uint32_t *src1, const uint32_t *src2)
 {
 	uint32_t i, in1, in2, out1, out2;
 
 	for (i=0; i < 16; i += 2) {
 		src1 = block_input[i] ? (uint32_t *)(block_input[i]->data) : zeros;
 		src2 = block_input[i+1] ? (uint32_t *)(block_input[i+1]->data) : zeros;
-		memcpy_tdm(dest, src1, src2);
+		memcpy_tdm_tx(dest, src1, src2);
 		dest++;
 	}
 	for (i=0; i < 16; i++) {
 		| I2S_TCR4_FSE | I2S_TCR4_FSD;
 	I2S0_TCR5 = I2S_TCR5_WNW(31) | I2S_TCR5_W0W(31) | I2S_TCR5_FBT(31);
 
-#if 0
 	// configure receiver (sync'd to transmitter clocks)
 	I2S0_RMR = 0;
-	I2S0_RCR1 = I2S_RCR1_RFW(1);
+	I2S0_RCR1 = I2S_RCR1_RFW(4);
 	I2S0_RCR2 = I2S_RCR2_SYNC(1) | I2S_TCR2_BCP | I2S_RCR2_MSEL(1)
-		| I2S_RCR2_BCD | I2S_RCR2_DIV(3);
+		| I2S_RCR2_BCD | I2S_RCR2_DIV(0);
 	I2S0_RCR3 = I2S_RCR3_RCE;
-	I2S0_RCR4 = I2S_RCR4_FRSZ(1) | I2S_RCR4_SYWD(15) | I2S_RCR4_MF
-		| I2S_RCR4_FSE | I2S_RCR4_FSP | I2S_RCR4_FSD;
-	I2S0_RCR5 = I2S_RCR5_WNW(15) | I2S_RCR5_W0W(15) | I2S_RCR5_FBT(15);
-#endif
+	I2S0_RCR4 = I2S_RCR4_FRSZ(7) | I2S_RCR4_SYWD(0) | I2S_RCR4_MF
+		| I2S_RCR4_FSE | I2S_RCR4_FSD;
+	I2S0_RCR5 = I2S_RCR5_WNW(31) | I2S_RCR5_W0W(31) | I2S_RCR5_FBT(31);
 
 	// configure pin mux for 3 clock signals
 	CORE_PIN23_CONFIG = PORT_PCR_MUX(6); // pin 23, PTC2, I2S0_TX_FS (LRCLK)

output_tdm.h

 	AudioOutputTDM(void) : AudioStream(16, inputQueueArray) { begin(); }
 	virtual void update(void);
 	void begin(void);
-	friend class AudioInputI2S;
+	friend class AudioInputTDM;
 protected:
 	static void config_tdm(void);
 	static audio_block_t *block_input[16];