initial commit

project/realtek_ameba1_va0_example/example_sources/i2s/readme.txt

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+Example Description
+
+This example describes how to use i2s by using mbed extend api
+
+1.Plug ALC5651 shield to Ameba HDK
+   
+2.Run the main function.
+
+3.Plug earphone to Green phone jack
+

project/realtek_ameba1_va0_example/example_sources/i2s/src/main.c

@@ -0,0 +1,331 @@
+#include "FreeRTOS.h"
+#include "task.h"
+#include "diag.h"
+#include "main.h"
+
+#include "i2s_api.h"
+
+/**
+  * @brief  Main program.
+  * @param  None
+  * @retval None
+  */
+#include "alc5651.h"
+/*
+extern void alc5651_init(void);
+extern void alc5651_init_interface2(void);
+extern void alc5651_reg_dump(void);
+extern void alc5651_index_dump(void);
+extern void alc5651_set_word_len(int len_idx);
+*/
+i2s_t i2s_obj;
+
+#define I2S_DMA_PAGE_SIZE	768   // 2 ~ 4096
+#define I2S_DMA_PAGE_NUM    4   // Vaild number is 2~4
+
+u8 i2s_tx_buf[I2S_DMA_PAGE_SIZE*I2S_DMA_PAGE_NUM];
+u8 i2s_rx_buf[I2S_DMA_PAGE_SIZE*I2S_DMA_PAGE_NUM];
+
+#define SAMPLE_FILE
+#define SAMPLE_FILE_RATE 44100
+#define SAMPLE_FILE_CHNUM 2
+
+#define I2S_SCLK_PIN            PC_1
+#define I2S_WS_PIN              PC_0
+#define I2S_SD_PIN              PC_2
+
+#if defined(SAMPLE_FILE)
+// no sample
+//	SR_96KHZ,
+//	SR_7p35KHZ,
+//	SR_29p4KHZ,
+//	SR_88p2KHZ
+#if SAMPLE_FILE_RATE==8000
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_8000_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_8KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==14700
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_14700_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_14p7KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==16000
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_16000_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_16KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==22050
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_22050_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_22p05KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==24000
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_24000_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_24KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==32000
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_32000_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_32KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==44100
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_44100_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_44p1KHZ
+	#endif
+#elif SAMPLE_FILE_RATE==48000
+	#if SAMPLE_FILE_CHNUM==2
+		#include "birds_48000_2ch_16b.c"
+		#undef SAMPLE_FILE_RATE
+		#define SAMPLE_FILE_RATE SR_48KHZ
+	#endif
+#endif
+
+#if SAMPLE_FILE_CHNUM==2
+	#undef SAMPLE_FILE_CHNUM
+	#define SAMPLE_FILE_CHNUM CH_STEREO
+#endif
+
+int curr_cnt=0;
+#else
+
+short test_sine16[16]={0, 12539/4, 23170/4, 30273/4, 32767/4, 30273/4, 23170/4, 12539/4,
+                  0, -12539/4, -23170/4, -30273/4, -32767/4, -30273/4, -23170/4, -12539/4};
+int test_sine24[16]={0, 12539*256/4, 23170*256/4, 30273*256/4, 32767*256/4, 30273*256/4, 23170*256/4, 12539*256/4,
+                  0, -12539*256/4, -23170*256/4, -30273*256/4, -32767*256/4, -30273*256/4, -23170*256/4, -12539*256/4};
+
+extern void wait_ms(u32);
+
+#include <math.h>
+short remap_level_to_signed_16_bit(float val)
+{
+	val*=32767;
+	if(val>32767)	val=32767;
+	if(val<-32768)	val=-32768;
+	
+	return val;
+}
+
+void generate_freq_16bit(short *buffer, int count, float freq, float sampling_rate)
+{
+  int pos; // sample number we're on
+
+  for (pos = 0; pos < count; pos++) {
+    float a = 2 * 3.14159f * freq * pos / sampling_rate;
+    // convert from [-1.0,1.0] to [-32767,32767]:
+    buffer[pos] = remap_level_to_signed_16_bit(a);
+  }
+}
+
+void gen_sound_sample16(short *buf, int buf_size, int channel_num)
+{
+	int i;
+	for (i = 0 ; i < buf_size ; i+=channel_num){
+		buf[i] = test_sine16[(i/channel_num)%16];
+		if(channel_num>=2)
+        	buf[i+1] = test_sine16[(i/channel_num)%16];
+    }
+}
+
+void gen_sound_sample24(int *buf, int buf_size, int channel_num)
+{
+	int i;
+	for (i = 0 ; i < buf_size ; i+=channel_num){
+		buf[i] = test_sine24[(i/channel_num)%16]&0xFFFFFF;
+		if(channel_num>=2)
+        	//buf[i+1] = test_sine24[(i/channel_num)%16]&0xFFFFFF;
+			buf[i+1] = test_sine24[(i/channel_num)%16]&0xFFFFFF;
+    }
+}
+
+#if 0
+void test_delay(int sec)
+{
+	for(int i=0;i<166*1000*100*sec;i++)
+		asm(" nop");
+}
+#endif
+
+int test_rate_list[12] = {
+    SR_8KHZ, 
+    SR_16KHZ,
+    SR_24KHZ,
+	SR_32KHZ,
+    SR_48KHZ,
+	SR_96KHZ,
+	SR_7p35KHZ,
+	SR_14p7KHZ,
+	SR_22p05KHZ,
+	SR_29p4KHZ,
+	SR_44p1KHZ,
+	SR_88p2KHZ
+};
+#endif
+
+void test_tx_complete(void *data, char *pbuf)
+{
+    int *ptx_buf;
+    
+    i2s_t *obj = (i2s_t *)data;
+    static u32 count=0;
+    //DBG_8195A_I2S_LVL(VERI_I2S_LVL, "I2S%d %s\n",pI2SDemoHnd->DevNum,__func__);
+    count++;
+    if ((count&1023) == 1023)
+    {
+         DBG_8195A_I2S_LVL(VERI_I2S_LVL, ",\n");
+    }
+
+    ptx_buf = i2s_get_tx_page(obj);
+    //ptx_buf = (int*)pbuf;
+#if defined(SAMPLE_FILE)	
+    _memcpy((void*)ptx_buf, (void*)&sample[curr_cnt], I2S_DMA_PAGE_SIZE);
+	curr_cnt+=(I2S_DMA_PAGE_SIZE/sizeof(short));
+	if(curr_cnt >= sample_size*(obj->channel_num==CH_MONO?1:2)) {
+		curr_cnt = 0;
+    }
+#else
+	if(obj->word_length == WL_16b){
+		gen_sound_sample16((short*)ptx_buf, I2S_DMA_PAGE_SIZE/sizeof(short), obj->channel_num==CH_MONO?1:2);
+	}else{
+		gen_sound_sample24((int*)ptx_buf, I2S_DMA_PAGE_SIZE/sizeof(int), obj->channel_num==CH_MONO?1:2);
+	}
+#endif
+    i2s_send_page(obj, (uint32_t*)ptx_buf);
+}
+
+void test_rx_complete(void *data, char* pbuf)
+{
+    i2s_t *obj = (i2s_t *)data;
+    int *ptx_buf;
+
+    static u32 count=0;
+    count++;
+    if ((count&1023) == 1023)
+    {
+         DBG_8195A_I2S_LVL(VERI_I2S_LVL, ".\n");
+    }
+
+    ptx_buf = i2s_get_tx_page(obj);
+    _memcpy((void*)ptx_buf, (void*)pbuf, I2S_DMA_PAGE_SIZE);
+    i2s_recv_page(obj);    // submit a new page for receive
+    i2s_send_page(obj, (uint32_t*)ptx_buf);    // loopback
+}
+
+void main(void)
+{
+    int *ptx_buf;
+    int i,j;
+    
+	alc5651_init();
+	alc5651_init_interface2();	// connect to ALC interface 2
+	
+	// dump register 
+	//alc5651_reg_dump();
+	//alc5651_index_dump();
+
+	// I2S init
+	i2s_obj.channel_num = CH_MONO;//CH_STEREO;
+	i2s_obj.sampling_rate = SR_44p1KHZ;
+	i2s_obj.word_length = WL_16b;
+	i2s_obj.direction = I2S_DIR_TXRX;    
+	i2s_init(&i2s_obj, I2S_SCLK_PIN, I2S_WS_PIN, I2S_SD_PIN);
+    i2s_set_dma_buffer(&i2s_obj, (char*)i2s_tx_buf, (char*)i2s_rx_buf, \
+        I2S_DMA_PAGE_NUM, I2S_DMA_PAGE_SIZE);
+    i2s_tx_irq_handler(&i2s_obj, (i2s_irq_handler)test_tx_complete, (uint32_t)&i2s_obj);
+    i2s_rx_irq_handler(&i2s_obj, (i2s_irq_handler)test_rx_complete, (uint32_t)&i2s_obj);
+    
+#if defined(SAMPLE_FILE)	
+	i2s_set_param(&i2s_obj,SAMPLE_FILE_CHNUM,SAMPLE_FILE_RATE,WL_16b);
+    for (i=0;i<I2S_DMA_PAGE_NUM;i++) {
+        ptx_buf = i2s_get_tx_page(&i2s_obj);
+        if (ptx_buf) {
+            _memcpy((void*)ptx_buf, (void*)&sample[curr_cnt], I2S_DMA_PAGE_SIZE);
+            i2s_send_page(&i2s_obj, (uint32_t*)ptx_buf);
+            curr_cnt+=(I2S_DMA_PAGE_SIZE/sizeof(short));
+            if(curr_cnt >= sample_size*(i2s_obj.channel_num==CH_MONO?1:2)) {
+                curr_cnt = 0;
+            }
+        }
+    }
+#else
+	// output freq, @ sampling rate
+	// 6kHz 		@ 96kHz
+	// 3kHz 		@ 48kHz
+	// 2kHz			@ 32kHz
+	// 1.5kHz 		@ 24kHz
+	// 1kHz 		@ 16kHz
+	// 500Hz 		@ 8kHz
+	// 5512.5 Hz 	@ 88200Hz
+	// 2756.25 Hz	@ 44100Hz
+	// 1837.5 Hz	@ 29400Hz
+	// 1378.125 Hz	@ 22050Hz
+	// 459.375 Hz	@ 7350Hz
+
+	// Stereo, 16bit
+	for(i=0;i<12;i++){
+		i2s_set_param(&i2s_obj,CH_STEREO,test_rate_list[i],WL_16b);
+        // Start with fill all pages of DMA buffer
+        for (j=0;j<I2S_DMA_PAGE_NUM;j++) {
+            ptx_buf = i2s_get_tx_page(&i2s_obj);
+            if (ptx_buf) {
+                gen_sound_sample16((short*)ptx_buf, I2S_DMA_PAGE_SIZE/sizeof(short), 2);
+                i2s_send_page(&i2s_obj, (uint32_t*)ptx_buf);
+            }
+        }
+        wait_ms(5000);  // delay 5 sec.
+	}
+
+	// Mono, 16bit
+	for(i=0;i<12;i++){
+		i2s_set_param(&i2s_obj,CH_MONO,test_rate_list[i],WL_16b);
+        for (j=0;j<I2S_DMA_PAGE_NUM;j++) {
+            ptx_buf = i2s_get_tx_page(&i2s_obj);
+            if (ptx_buf) {
+                gen_sound_sample16((short*)ptx_buf, I2S_DMA_PAGE_SIZE/sizeof(short), 1);
+                i2s_send_page(&i2s_obj, (uint32_t*)ptx_buf);
+            }
+        }
+        wait_ms(5000);  // delay 5 sec.
+	}
+
+//	i2s_deinit(&i2s_obj);
+	i2s_disable(&i2s_obj);
+
+	alc5651_set_word_len(2);	
+	alc5651_reg_dump();
+    
+	i2s_enable(&i2s_obj);
+	// Stereo, 24bit
+	for(i=0;i<12;i++){
+		i2s_set_param(&i2s_obj,CH_STEREO,test_rate_list[i],WL_24b);
+        for (j=0;j<I2S_DMA_PAGE_NUM;j++) {
+            ptx_buf = i2s_get_tx_page(&i2s_obj);
+            if (ptx_buf) {
+                gen_sound_sample24((int*)ptx_buf, I2S_DMA_PAGE_SIZE/sizeof(int), 2);
+                i2s_send_page(&i2s_obj, (uint32_t*)ptx_buf);
+            }
+        }
+        wait_ms(5000);  // delay 5 sec.
+	}
+	
+	// Not Support Mono, 24bit
+	i2s_deinit(&i2s_obj);
+#endif
+	
+	
+	while(1){
+		asm volatile ("nop\n\t");//If run in non-os environment,it needs to add nop operation
+		asm volatile ("nop\n\t");
+		asm volatile ("nop\n\t");
+		asm volatile ("nop\n\t");
+	}
+}