Diff: main.cpp

Revision:

0:48a46b0d0cdd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Sep 30 07:18:44 2015 +0000
@@ -0,0 +1,88 @@
+#include "mbed.h"
+#include "USBHostDac.h"
+
+#if defined(TARGET_RZ_A1H)
+#include "usb_host_setting.h"
+#else
+#define USB_HOST_CH     0
+#endif
+
+#if (USB_HOST_CH == 1) //Audio Shield USB1
+DigitalOut usb1en(P3_8);
+#endif
+DigitalIn  button(USER_BUTTON0);
+
+#define AUDIO_READ_BUFF_SIZE   (2048)
+#define AUDIO_WRITE_BUFF_SIZE  (AUDIO_READ_BUFF_SIZE * 2)
+
+#define AUDIO_WRITE_BUFF_NUM   (2)
+
+static uint16_t audio_read_buff[AUDIO_READ_BUFF_SIZE/2];
+static uint16_t audio_write_buff[AUDIO_WRITE_BUFF_NUM][AUDIO_WRITE_BUFF_SIZE/2];
+
+Semaphore sem(0);
+
+void test_task(void const* arg) {
+    int buf_index = 0;
+    USBHostDac * p_usbdac = (USBHostDac *)arg;
+
+    while (1) {
+        sem.wait();
+
+        p_usbdac->send((uint8_t *)audio_write_buff[buf_index], AUDIO_WRITE_BUFF_SIZE, false);
+
+        buf_index++;
+        if (buf_index >= AUDIO_WRITE_BUFF_NUM) {
+            buf_index = 0;
+        }
+    }
+}
+
+int main() {
+    int buf_index = 0;
+
+#if (USB_HOST_CH == 1) //Audio Shield USB1
+    //Audio Shield USB1 enable
+    usb1en = 1;        //Outputs high level
+    Thread::wait(5);
+    usb1en = 0;        //Outputs low level
+#endif
+
+    USBHostDac usbdac;
+    Thread TestTask(test_task, &usbdac, osPriorityNormal, 1024 * 8);
+
+    while(1) {
+        // try to connect a usbdac device
+        while(!usbdac.connect()) {
+            Thread::wait(500);
+        }
+
+        while (1) {
+            // if device disconnected, try to connect again
+            if (!usbdac.connected()) {
+                break;
+            }
+            int ret = usbdac.receive((uint8_t *)audio_read_buff, AUDIO_READ_BUFF_SIZE);
+            if (ret > 0) {
+                //1ch -> 2ch
+                uint16_t * p_write = audio_write_buff[buf_index];
+                uint16_t * p_read  = audio_read_buff;
+
+                for (int cnt = 0; cnt < (ret / 2); cnt++) {
+                    *p_write = *p_read;
+                    p_write++;
+                    *p_write = *p_read;
+                    p_write++;
+                    p_read++;
+                }
+
+                sem.release();
+
+                buf_index++;
+                if (buf_index >= AUDIO_WRITE_BUFF_NUM) {
+                    buf_index = 0;
+                }
+            }
+        }
+    }
+}