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Basic hook up of audio to buffer (without FIFO) - output audible!

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This commit is contained in:
Ed Clarke
2018-10-26 14:16:17 +01:00
parent 1db927601a
commit 2405b2f4f1
5 changed files with 44 additions and 33 deletions
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32
examples/xua_lite_example/src/xua_buffer.xc
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@@ -1,4 +1,7 @@
#include <stdint.h>
#include <xs1.h>
#include "xua_commands.h"
#include "xud.h"
#include "testct_byref.h"
@@ -135,6 +138,8 @@ void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, ch
// printintln(MAX_OUT_SAMPLES_PER_SOF_PERIOD);
int loopback_samples[MAX_OUT_SAMPLES_PER_SOF_PERIOD] = {0};
int32_t samples_out[NUM_USB_CHAN_OUT] = {0};
int32_t samples_in[NUM_USB_CHAN_IN] = {0};
while(1){
XUD_Result_t result;
@@ -218,6 +223,7 @@ void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, ch
clocks = clockcounter / MCLK_48;
mod_from_last_time = clockcounter % MCLK_48;
//Scale for working out number of samps to take from device for input
if(AUDIO_CLASS == 2)
{
clocks <<= 3;
@@ -226,20 +232,16 @@ void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, ch
{
clocks <<= 6;
}
asm volatile("stw %0, dp[g_speed]"::"r"(clocks)); // g_speed = clocks
//Write to feedback EP buffer
if (AUDIO_CLASS == 2)
{
int usb_speed;
asm volatile("stw %0, dp[g_speed]"::"r"(clocks)); // g_speed = clocks
if (AUDIO_CLASS == 2)
{
fb_clocks[0] = clocks;
}
else
{
fb_clocks[0] = clocks >> 2;
}
fb_clocks[0] = clocks;
}
else
{
fb_clocks[0] = clocks >> 2;
}
clockcounter = 0;
}
@@ -287,6 +289,12 @@ void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, ch
XUD_SetReady_InPtr(ep_aud_in, (unsigned)buffer_aud_in, input_buffer_size); //loopback
num_samples_to_send_to_host = 0;
break;
case c_audio_hub :> samples_in[0]:
for (int i = 1; i < NUM_USB_CHAN_IN; i++) c_audio_hub :> samples_in[i];
// for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio_hub <: samples_out[1];
for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio_hub <: loopback_samples[i];
break;
}
}
}