Reassign DMA channels for compatibility with OctoWS2811

input_adc.cpp

 	SIM_SCGC7 |= SIM_SCGC7_DMA;
 	SIM_SCGC6 |= SIM_SCGC6_DMAMUX;
 	DMA_CR = 0;
-	DMA_TCD2_SADDR = &ADC0_RA;
-	DMA_TCD2_SOFF = 0;
-	DMA_TCD2_ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
-	DMA_TCD2_NBYTES_MLNO = 2;
-	DMA_TCD2_SLAST = 0;
-	DMA_TCD2_DADDR = analog_rx_buffer;
-	DMA_TCD2_DOFF = 2;
-	DMA_TCD2_CITER_ELINKNO = sizeof(analog_rx_buffer) / 2;
-	DMA_TCD2_DLASTSGA = -sizeof(analog_rx_buffer);
-	DMA_TCD2_BITER_ELINKNO = sizeof(analog_rx_buffer) / 2;
-	DMA_TCD2_CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
-	DMAMUX0_CHCFG2 = DMAMUX_DISABLE;
-	DMAMUX0_CHCFG2 = DMAMUX_SOURCE_ADC0 | DMAMUX_ENABLE;
+	DMA_TCD_SADDR(AUDIO_IN_ADC_DMA_CHANNEL) = &ADC0_RA;
+	DMA_TCD_SOFF(AUDIO_IN_ADC_DMA_CHANNEL) = 0;
+	DMA_TCD_ATTR(AUDIO_IN_ADC_DMA_CHANNEL) = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
+	DMA_TCD_NBYTES_MLNO(AUDIO_IN_ADC_DMA_CHANNEL) = 2;
+	DMA_TCD_SLAST(AUDIO_IN_ADC_DMA_CHANNEL) = 0;
+	DMA_TCD_DADDR(AUDIO_IN_ADC_DMA_CHANNEL) = analog_rx_buffer;
+	DMA_TCD_DOFF(AUDIO_IN_ADC_DMA_CHANNEL) = 2;
+	DMA_TCD_CITER_ELINKNO(AUDIO_IN_ADC_DMA_CHANNEL) = sizeof(analog_rx_buffer) / 2;
+	DMA_TCD_DLASTSGA(AUDIO_IN_ADC_DMA_CHANNEL) = -sizeof(analog_rx_buffer);
+	DMA_TCD_BITER_ELINKNO(AUDIO_IN_ADC_DMA_CHANNEL) = sizeof(analog_rx_buffer) / 2;
+	DMA_TCD_CSR(AUDIO_IN_ADC_DMA_CHANNEL) = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
+	DMAMUX0_CHCFG(AUDIO_IN_ADC_DMA_CHANNEL) = DMAMUX_DISABLE;
+	DMAMUX0_CHCFG(AUDIO_IN_ADC_DMA_CHANNEL) = DMAMUX_SOURCE_ADC0 | DMAMUX_ENABLE;
 	update_responsibility = update_setup();
-	DMA_SERQ = 2;
-	NVIC_ENABLE_IRQ(IRQ_DMA_CH2);
+	DMA_SERQ = AUDIO_IN_ADC_DMA_CHANNEL;
+	NVIC_ENABLE_IRQ(IRQ_DMA_CH(AUDIO_IN_ADC_DMA_CHANNEL));
 }
 
-void dma_ch2_isr(void)
+void DMA_ISR(AUDIO_IN_ADC_DMA_CHANNEL)(void)
 {
 	uint32_t daddr, offset;
 	const uint16_t *src, *end;
 	audio_block_t *left;
 
 	//digitalWriteFast(3, HIGH);
-	daddr = (uint32_t)DMA_TCD2_DADDR;
-	DMA_CINT = 2;
+	daddr = (uint32_t)(DMA_TCD_DADDR(AUDIO_IN_ADC_DMA_CHANNEL));
+	DMA_CINT = AUDIO_IN_ADC_DMA_CHANNEL;
 
 	if (daddr < (uint32_t)analog_rx_buffer + sizeof(analog_rx_buffer) / 2) {
 		// DMA is receiving to the first half of the buffer

input_adc.h

 #define input_adc_h_
 
 #include "AudioStream.h"
+#include "utility/dma_chan.h"
+
+#ifdef __MK20DX128__
+#define AUDIO_IN_ADC_DMA_CHANNEL 2
+#else
+#define AUDIO_IN_ADC_DMA_CHANNEL 6
+#endif
 
 class AudioInputAnalog : public AudioStream
 {
         AudioInputAnalog(unsigned int pin) : AudioStream(0, NULL) { begin(pin); }
         virtual void update(void);
         void begin(unsigned int pin);
-        friend void dma_ch2_isr(void);
+        friend void DMA_ISR(AUDIO_IN_ADC_DMA_CHANNEL)(void);
 private:
         static audio_block_t *block_left;
         static uint16_t block_offset;

input_i2s.cpp

 	CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
 
 	DMA_CR = 0;
-	DMA_TCD1_SADDR = &I2S0_RDR0;
-	DMA_TCD1_SOFF = 0;
-	DMA_TCD1_ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
-	DMA_TCD1_NBYTES_MLNO = 2;
-	DMA_TCD1_SLAST = 0;
-	DMA_TCD1_DADDR = i2s_rx_buffer;
-	DMA_TCD1_DOFF = 2;
-	DMA_TCD1_CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
-	DMA_TCD1_DLASTSGA = -sizeof(i2s_rx_buffer);
-	DMA_TCD1_BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
-	DMA_TCD1_CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
-
-	DMAMUX0_CHCFG1 = DMAMUX_DISABLE;
-	DMAMUX0_CHCFG1 = DMAMUX_SOURCE_I2S0_RX | DMAMUX_ENABLE;
+	DMA_TCD_SADDR(AUDIO_IN_I2S_DMA_CHANNEL) = &I2S0_RDR0;
+	DMA_TCD_SOFF(AUDIO_IN_I2S_DMA_CHANNEL) = 0;
+	DMA_TCD_ATTR(AUDIO_IN_I2S_DMA_CHANNEL) = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
+	DMA_TCD_NBYTES_MLNO(AUDIO_IN_I2S_DMA_CHANNEL) = 2;
+	DMA_TCD_SLAST(AUDIO_IN_I2S_DMA_CHANNEL) = 0;
+	DMA_TCD_DADDR(AUDIO_IN_I2S_DMA_CHANNEL) = i2s_rx_buffer;
+	DMA_TCD_DOFF(AUDIO_IN_I2S_DMA_CHANNEL) = 2;
+	DMA_TCD_CITER_ELINKNO(AUDIO_IN_I2S_DMA_CHANNEL) = sizeof(i2s_rx_buffer) / 2;
+	DMA_TCD_DLASTSGA(AUDIO_IN_I2S_DMA_CHANNEL) = -sizeof(i2s_rx_buffer);
+	DMA_TCD_BITER_ELINKNO(AUDIO_IN_I2S_DMA_CHANNEL) = sizeof(i2s_rx_buffer) / 2;
+	DMA_TCD_CSR(AUDIO_IN_I2S_DMA_CHANNEL) = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
+
+	DMAMUX0_CHCFG(AUDIO_IN_I2S_DMA_CHANNEL) = DMAMUX_DISABLE;
+	DMAMUX0_CHCFG(AUDIO_IN_I2S_DMA_CHANNEL) = DMAMUX_SOURCE_I2S0_RX | DMAMUX_ENABLE;
 	update_responsibility = update_setup();
-	DMA_SERQ = 1;
+	DMA_SERQ = AUDIO_IN_I2S_DMA_CHANNEL;
 
 	// TODO: is I2S_RCSR_BCE appropriate if sync'd to transmitter clock?
 	//I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
 	I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_FRDE | I2S_RCSR_FR;
-	NVIC_ENABLE_IRQ(IRQ_DMA_CH1);
+	NVIC_ENABLE_IRQ(IRQ_DMA_CH(AUDIO_IN_I2S_DMA_CHANNEL));
 }
 
-void dma_ch1_isr(void)
+void DMA_ISR(AUDIO_IN_I2S_DMA_CHANNEL)(void)
 {
 	uint32_t daddr, offset;
 	const int16_t *src, *end;
 	audio_block_t *left, *right;
 
 	//digitalWriteFast(3, HIGH);
-	daddr = (uint32_t)DMA_TCD1_DADDR;
-        DMA_CINT = 1;
+	daddr = (uint32_t)(DMA_TCD_DADDR(AUDIO_IN_I2S_DMA_CHANNEL));
+        DMA_CINT = AUDIO_IN_I2S_DMA_CHANNEL;
 
 	if (daddr < (uint32_t)i2s_rx_buffer + sizeof(i2s_rx_buffer) / 2) {
 		// DMA is receiving to the first half of the buffer
 	CORE_PIN13_CONFIG = PORT_PCR_MUX(4); // pin 13, PTC5, I2S0_RXD0
 
 	DMA_CR = 0;
-	DMA_TCD1_SADDR = &I2S0_RDR0;
-	DMA_TCD1_SOFF = 0;
-	DMA_TCD1_ATTR = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
-	DMA_TCD1_NBYTES_MLNO = 2;
-	DMA_TCD1_SLAST = 0;
-	DMA_TCD1_DADDR = i2s_rx_buffer;
-	DMA_TCD1_DOFF = 2;
-	DMA_TCD1_CITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
-	DMA_TCD1_DLASTSGA = -sizeof(i2s_rx_buffer);
-	DMA_TCD1_BITER_ELINKNO = sizeof(i2s_rx_buffer) / 2;
-	DMA_TCD1_CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
-
-	DMAMUX0_CHCFG1 = DMAMUX_DISABLE;
-	DMAMUX0_CHCFG1 = DMAMUX_SOURCE_I2S0_RX | DMAMUX_ENABLE;
+	DMA_TCD_SADDR(AUDIO_IN_I2S_DMA_CHANNEL) = &I2S0_RDR0;
+	DMA_TCD_SOFF(AUDIO_IN_I2S_DMA_CHANNEL) = 0;
+	DMA_TCD_ATTR(AUDIO_IN_I2S_DMA_CHANNEL) = DMA_TCD_ATTR_SSIZE(1) | DMA_TCD_ATTR_DSIZE(1);
+	DMA_TCD_NBYTES_MLNO(AUDIO_IN_I2S_DMA_CHANNEL) = 2;
+	DMA_TCD_SLAST(AUDIO_IN_I2S_DMA_CHANNEL) = 0;
+	DMA_TCD_DADDR(AUDIO_IN_I2S_DMA_CHANNEL) = i2s_rx_buffer;
+	DMA_TCD_DOFF(AUDIO_IN_I2S_DMA_CHANNEL) = 2;
+	DMA_TCD_CITER_ELINKNO(AUDIO_IN_I2S_DMA_CHANNEL) = sizeof(i2s_rx_buffer) / 2;
+	DMA_TCD_DLASTSGA(AUDIO_IN_I2S_DMA_CHANNEL) = -sizeof(i2s_rx_buffer);
+	DMA_TCD_BITER_ELINKNO(AUDIO_IN_I2S_DMA_CHANNEL) = sizeof(i2s_rx_buffer) / 2;
+	DMA_TCD_CSR(AUDIO_IN_I2S_DMA_CHANNEL) = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
+
+	DMAMUX0_CHCFG(AUDIO_IN_I2S_DMA_CHANNEL) = DMAMUX_DISABLE;
+	DMAMUX0_CHCFG(AUDIO_IN_I2S_DMA_CHANNEL) = DMAMUX_SOURCE_I2S0_RX | DMAMUX_ENABLE;
 	update_responsibility = update_setup();
-	DMA_SERQ = 1;
+	DMA_SERQ = AUDIO_IN_I2S_DMA_CHANNEL;
 
 	// TODO: is I2S_RCSR_BCE appropriate if sync'd to transmitter clock?
 	//I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_BCE | I2S_RCSR_FRDE | I2S_RCSR_FR;
 	I2S0_RCSR |= I2S_RCSR_RE | I2S_RCSR_FRDE | I2S_RCSR_FR;
-	NVIC_ENABLE_IRQ(IRQ_DMA_CH1);
+	NVIC_ENABLE_IRQ(IRQ_DMA_CH(AUDIO_IN_I2S_DMA_CHANNEL));
 }
 
 

input_i2s.h

  * THE SOFTWARE.
  */
 
-#ifndef input_i2s_h_
-#define _input_i2sh_
+#ifndef _input_i2s_h_
+#define _input_i2s_h_
 
 #include "AudioStream.h"
+#include "utility/dma_chan.h"
+
+#ifdef __MK20DX128__
+#define AUDIO_IN_I2S_DMA_CHANNEL 1
+#else
+#define AUDIO_IN_I2S_DMA_CHANNEL 5
+#endif
 
 class AudioInputI2S : public AudioStream
 {
 	AudioInputI2S(void) : AudioStream(0, NULL) { begin(); }
 	virtual void update(void);
 	void begin(void);
-	friend void dma_ch1_isr(void);
+	friend void DMA_ISR(AUDIO_IN_I2S_DMA_CHANNEL)(void);
 protected:	
 	AudioInputI2S(int dummy): AudioStream(0, NULL) {} // to be used only inside AudioInputI2Sslave !!
 	static bool update_responsibility;

output_pwm.cpp

 	SIM_SCGC7 |= SIM_SCGC7_DMA;
 	SIM_SCGC6 |= SIM_SCGC6_DMAMUX;
 	DMA_CR = 0;
-	DMA_TCD3_SADDR = pwm_dma_buffer;
-	DMA_TCD3_SOFF = 4;
-	DMA_TCD3_ATTR = DMA_TCD_ATTR_SSIZE(2) | DMA_TCD_ATTR_DSIZE(2) | DMA_TCD_ATTR_DMOD(4);
-	DMA_TCD3_NBYTES_MLNO = 8;
-	DMA_TCD3_SLAST = -sizeof(pwm_dma_buffer);
-	DMA_TCD3_DADDR = &FTM1_C0V;
-	DMA_TCD3_DOFF = 8;
-	DMA_TCD3_CITER_ELINKNO = sizeof(pwm_dma_buffer) / 8;
-	DMA_TCD3_DLASTSGA = 0;
-	DMA_TCD3_BITER_ELINKNO = sizeof(pwm_dma_buffer) / 8;
-	DMA_TCD3_CSR = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
-	DMAMUX0_CHCFG3 = DMAMUX_DISABLE;
-	DMAMUX0_CHCFG3 = DMAMUX_SOURCE_FTM1_CH0 | DMAMUX_ENABLE;
-	DMA_SERQ = 3;
+	DMA_TCD_SADDR(AUDIO_OUT_PWM_DMA_CHANNEL) = pwm_dma_buffer;
+	DMA_TCD_SOFF(AUDIO_OUT_PWM_DMA_CHANNEL) = 4;
+	DMA_TCD_ATTR(AUDIO_OUT_PWM_DMA_CHANNEL) = DMA_TCD_ATTR_SSIZE(2)
+		| DMA_TCD_ATTR_DSIZE(2) | DMA_TCD_ATTR_DMOD(4);
+	DMA_TCD_NBYTES_MLNO(AUDIO_OUT_PWM_DMA_CHANNEL) = 8;
+	DMA_TCD_SLAST(AUDIO_OUT_PWM_DMA_CHANNEL) = -sizeof(pwm_dma_buffer);
+	DMA_TCD_DADDR(AUDIO_OUT_PWM_DMA_CHANNEL) = &FTM1_C0V;
+	DMA_TCD_DOFF(AUDIO_OUT_PWM_DMA_CHANNEL) = 8;
+	DMA_TCD_CITER_ELINKNO(AUDIO_OUT_PWM_DMA_CHANNEL) = sizeof(pwm_dma_buffer) / 8;
+	DMA_TCD_DLASTSGA(AUDIO_OUT_PWM_DMA_CHANNEL) = 0;
+	DMA_TCD_BITER_ELINKNO(AUDIO_OUT_PWM_DMA_CHANNEL) = sizeof(pwm_dma_buffer) / 8;
+	DMA_TCD_CSR(AUDIO_OUT_PWM_DMA_CHANNEL) = DMA_TCD_CSR_INTHALF | DMA_TCD_CSR_INTMAJOR;
+	DMAMUX0_CHCFG(AUDIO_OUT_PWM_DMA_CHANNEL) = DMAMUX_DISABLE;
+	DMAMUX0_CHCFG(AUDIO_OUT_PWM_DMA_CHANNEL) = DMAMUX_SOURCE_FTM1_CH0 | DMAMUX_ENABLE;
+	DMA_SERQ = AUDIO_OUT_PWM_DMA_CHANNEL;
 	update_responsibility = update_setup();
-	NVIC_ENABLE_IRQ(IRQ_DMA_CH3);
+	NVIC_ENABLE_IRQ(IRQ_DMA_CH(AUDIO_OUT_PWM_DMA_CHANNEL));
 }
 
 void AudioOutputPWM::update(void)
 	}
 }
 
-void dma_ch3_isr(void)
+void DMA_ISR(AUDIO_OUT_PWM_DMA_CHANNEL)(void)
 {
 	int16_t *src;
 	uint32_t *dest;
 	audio_block_t *block;
 	uint32_t saddr, offset;
 
-	saddr = (uint32_t)DMA_TCD3_SADDR;
-        DMA_CINT = 3;
+	saddr = (uint32_t)(DMA_TCD_SADDR(AUDIO_OUT_PWM_DMA_CHANNEL));
+        DMA_CINT = AUDIO_OUT_PWM_DMA_CHANNEL;
 	if (saddr < (uint32_t)pwm_dma_buffer + sizeof(pwm_dma_buffer) / 2) {
 		// DMA is transmitting the first half of the buffer
 		// so we must fill the second half

output_pwm.h

 #define output_pwm_h_
 
 #include "AudioStream.h"
+#include "utility/dma_chan.h"
+
+#ifdef __MK20DX128__
+#define AUDIO_OUT_PWM_DMA_CHANNEL 3
+#else
+#define AUDIO_OUT_PWM_DMA_CHANNEL 7
+#endif
 
 class AudioOutputPWM : public AudioStream
 {
 	AudioOutputPWM(void) : AudioStream(1, inputQueueArray) { begin(); }
 	virtual void update(void);
 	void begin(void);
-	friend void dma_ch3_isr(void);
+	friend void DMA_ISR(AUDIO_OUT_PWM_DMA_CHANNEL)(void);
 private:
 	static audio_block_t *block_1st;
 	static audio_block_t *block_2nd;

utility/dma_chan.h

+/* Audio Library for Teensy 3.X
+ * Copyright (c) 2014, 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 dma_chan_h_
+#define dma_chan_h_
+
+#define DMA_ISR(ch)                     DMA_ISR_EXP(ch)
+#define DMA_ISR_EXP(ch)                 dma_ch ## ch ## _isr
+
+#define IRQ_DMA_CH(ch)                  IRQ_DMA_CH_EXP(ch)
+#define IRQ_DMA_CH_EXP(ch)              IRQ_DMA_CH ## ch
+
+#define DMAMUX0_CHCFG(ch)               DMAMUX0_CHCFG_EXP(ch)
+#define DMAMUX0_CHCFG_EXP(ch)           DMAMUX0_CHCFG ## ch
+
+#define DMA_TCD_SADDR(ch)               DMA_TCD_SADDR_EXP(ch)
+#define DMA_TCD_SADDR_EXP(ch)           DMA_TCD ## ch ## _SADDR
+
+#define DMA_TCD_SOFF(ch)                DMA_TCD_SOFF_EXP(ch)
+#define DMA_TCD_SOFF_EXP(ch)            DMA_TCD ## ch ## _SOFF
+
+#define DMA_TCD_ATTR(ch)                DMA_TCD_ATTR_EXP(ch)
+#define DMA_TCD_ATTR_EXP(ch)            DMA_TCD ## ch ## _ATTR
+
+#define DMA_TCD_NBYTES_MLNO(ch)         DMA_TCD_NBYTES_MLNO_EXP(ch)
+#define DMA_TCD_NBYTES_MLNO_EXP(ch)     DMA_TCD ## ch ## _NBYTES_MLNO
+
+#define DMA_TCD_SLAST(ch)               DMA_TCD_SLAST_EXP(ch)
+#define DMA_TCD_SLAST_EXP(ch)           DMA_TCD ## ch ## _SLAST
+
+#define DMA_TCD_DADDR(ch)               DMA_TCD_DADDR_EXP(ch)
+#define DMA_TCD_DADDR_EXP(ch)           DMA_TCD ## ch ## _DADDR
+
+#define DMA_TCD_DOFF(ch)                DMA_TCD_DOFF_EXP(ch)
+#define DMA_TCD_DOFF_EXP(ch)            DMA_TCD ## ch ## _DOFF
+
+#define DMA_TCD_CITER_ELINKNO(ch)       DMA_TCD_CITER_ELINKNO_EXP(ch)
+#define DMA_TCD_CITER_ELINKNO_EXP(ch)   DMA_TCD ## ch ## _CITER_ELINKNO
+
+#define DMA_TCD_DLASTSGA(ch)            DMA_TCD_DLASTSGA_EXP(ch)
+#define DMA_TCD_DLASTSGA_EXP(ch)        DMA_TCD ## ch ## _DLASTSGA
+
+#define DMA_TCD_BITER_ELINKNO(ch)       DMA_TCD_BITER_ELINKNO_EXP(ch)
+#define DMA_TCD_BITER_ELINKNO_EXP(ch)   DMA_TCD ## ch ## _BITER_ELINKNO
+
+#define DMA_TCD_CSR(ch)                 DMA_TCD_CSR_EXP(ch)
+#define DMA_TCD_CSR_EXP(ch)             DMA_TCD ## ch ## _CSR
+
+#endif