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Very early cut of xua_lite app. Builds (4 threads + I2C) but not functional

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Ed Clarke
2018-10-25 17:52:13 +01:00
parent 0b15179219
commit 770c11b3f0
9 changed files with 779 additions and 0 deletions
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274
examples/xua_lite_example/src/xua_buffer.xc Normal file
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#include <xs1.h>
#include "xua_commands.h"
#include "xud.h"
#include "testct_byref.h"
#include "debug_print.h"
#include "xua_conf.h"
//#include "fifo_impl.h" //xua_conf.h must be included before hand so that we have FIFO sizes
//Currently only single frequency supported
#define NOMINAL_SR_DEVICE DEFAULT_FREQ
#define NOMINAL_SR_HOST DEFAULT_FREQ
#define DIV_ROUND_UP(n, d) (n / d + 1) //Always rounds up to the next integer. Needed for 48001Hz case etc.
#define BIGGEST(a, b) (a > b ? a : b)
#define SOF_FREQ_HZ (8000 - ((2 - AUDIO_CLASS) * 7000) )
//Defines for endpoint buffer sizes. Samples is total number of samples across all channels
#define MAX_OUT_SAMPLES_PER_SOF_PERIOD (DIV_ROUND_UP(MAX_FREQ, SOF_FREQ_HZ) * NUM_USB_CHAN_OUT)
#define MAX_IN_SAMPLES_PER_SOF_PERIOD (DIV_ROUND_UP(MAX_FREQ, SOF_FREQ_HZ) * NUM_USB_CHAN_IN)
#define MAX_OUTPUT_SLOT_SIZE 4
#define MAX_INPUT_SLOT_SIZE 4
#define OUT_AUDIO_BUFFER_SIZE_BYTES (MAX_OUT_SAMPLES_PER_SOF_PERIOD * MAX_OUTPUT_SLOT_SIZE)
#define IN_AUDIO_BUFFER_SIZE_BYTES (MAX_IN_SAMPLES_PER_SOF_PERIOD * MAX_INPUT_SLOT_SIZE)
//Helper to disassemble USB packets into 32b left aligned audio samples
static inline void unpack_buff_to_samples(unsigned char input[], const unsigned n_samples, const unsigned slot_size, int output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
output[i] = (input[base + 3] << 24) | (input[base + 2] << 16) | (input[base + 1] << 8) | input[base + 0];
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
output[i] = (input[base + 2] << 24) | (input[base + 1] << 16) | (input[base + 0] << 8);
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
output[i] = (input[base + 1] << 24) | (input[base + 0] << 16);
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}
//Helper to assemble USB packets from 32b left aligned audio samples
static inline void pack_samples_to_buff(int input[], const unsigned n_samples, const unsigned slot_size, unsigned char output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
unsigned in_word = (unsigned)input[i];
output[base + 0] = in_word & 0xff;
output[base + 1] = (in_word & 0xff00) >> 8;
output[base + 2] = (in_word & 0xff0000) >> 16;
output[base + 3] = (in_word) >> 24;
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff00) >> 8;
output[base + 1] = (in_word & 0xff0000) >> 16;
output[base + 2] = (in_word) >> 24;
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff0000) >> 16;
output[base + 1] = (in_word) >> 24;
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}
//Shared memory buffers between buffer task and audio side
int asrc_to_host_sample_buffer[MAX_IN_SAMPLES_PER_SOF_PERIOD] = {0};
void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, chanend c_sof, chanend c_aud_ctl, in port p_for_mclk_count, chanend c_aud_host){
debug_printf("%d\n", MAX_OUT_SAMPLES_PER_SOF_PERIOD);
unsigned sampleFreq = DEFAULT_FREQ;
unsigned char buffer_aud_out[OUT_AUDIO_BUFFER_SIZE_BYTES];
unsigned char buffer_aud_in[IN_AUDIO_BUFFER_SIZE_BYTES];
unsigned in_subslot_size = (AUDIO_CLASS == 1) ? FS_STREAM_FORMAT_INPUT_1_SUBSLOT_BYTES : HS_STREAM_FORMAT_INPUT_1_SUBSLOT_BYTES;
unsigned out_subslot_size = (AUDIO_CLASS == 1) ? FS_STREAM_FORMAT_OUTPUT_1_SUBSLOT_BYTES : HS_STREAM_FORMAT_OUTPUT_1_SUBSLOT_BYTES;
unsigned in_num_chan = NUM_USB_CHAN_IN;
unsigned out_num_chan = NUM_USB_CHAN_OUT;
unsigned tmp;
XUD_ep ep_aud_out = XUD_InitEp(c_aud_out);
XUD_ep ep_aud_in = XUD_InitEp(c_aud_in);
unsigned num_samples_received_from_host = 0;
unsigned outstanding_samples_to_host = 0;
unsigned num_samples_to_send_to_host = 0;
XUD_SetReady_OutPtr(ep_aud_out, (unsigned)buffer_aud_out);
XUD_SetReady_InPtr(ep_aud_in, (unsigned)buffer_aud_in, num_samples_to_send_to_host);
// printintln(OUT_AUDIO_BUFFER_SIZE_BYTES);
// printintln(MAX_OUT_SAMPLES_PER_SOF_PERIOD);
while(1){
XUD_Result_t result;
unsigned length = 0;
select{
//Handle control path from EP0
case testct_byref(c_aud_ctl, tmp):
//ignore tmp as is used for reboot signalling only
unsigned cmd = inuint(c_aud_ctl);
debug_printf("c_aud_ctl cmd: %d\n", cmd);
if(cmd == SET_SAMPLE_FREQ){
unsigned receivedSampleFreq = inuint(c_aud_ctl);
debug_printf("SET_SAMPLE_FREQ: %d\n", receivedSampleFreq);
sampleFreq = receivedSampleFreq;
}
else if(cmd == SET_STREAM_FORMAT_IN){
unsigned formatChange_DataFormat = inuint(c_aud_ctl);
unsigned formatChange_NumChans = inuint(c_aud_ctl);
unsigned formatChange_SubSlot = inuint(c_aud_ctl);
unsigned formatChange_SampRes = inuint(c_aud_ctl);
debug_printf("SET_STREAM_FORMAT_IN: %d %d %d %d\n", formatChange_DataFormat, formatChange_NumChans, formatChange_SubSlot, formatChange_SampRes);
in_subslot_size = formatChange_SubSlot;
in_num_chan = formatChange_NumChans;
}
else if (cmd == SET_STREAM_FORMAT_OUT)
{
XUD_BusSpeed_t busSpeed;
unsigned formatChange_DataFormat = inuint(c_aud_ctl);
unsigned formatChange_NumChans = inuint(c_aud_ctl);
unsigned formatChange_SubSlot = inuint(c_aud_ctl);
unsigned formatChange_SampRes = inuint(c_aud_ctl);
debug_printf("SET_STREAM_FORMAT_OUT: %d %d %d %d\n", formatChange_DataFormat, formatChange_NumChans, formatChange_SubSlot, formatChange_SampRes);
out_subslot_size = formatChange_SubSlot;
out_num_chan = formatChange_NumChans;
}
else{
debug_printf("Unhandled command\n");
}
outct(c_aud_ctl, XS1_CT_END);
break;
//SOF
case inuint_byref(c_sof, tmp):
unsigned mclk_port_count = 0;
asm volatile(" getts %0, res[%1]" : "=r" (mclk_port_count) : "r" (p_for_mclk_count));
static unsigned sof_count=0;
sof_count++;
if (sof_count > SOF_FREQ_HZ * 10){
debug_printf("SOF\n");
sof_count = 0;
}
/* Assuming 48kHz from a 24.576 master clock (0.0407uS period)
* MCLK ticks per SOF = 125uS / 0.0407 = 3072 MCLK ticks per SOF.
* expected Feedback is 48000/8000 = 6 samples. so 0x60000 in 16:16 format.
* Average over 128 SOFs - 128 x 3072 = 0x60000.
*/
#if 0
unsigned long long feedbackMul = 64ULL;
if(usb_speed != XUD_SPEED_HS)
feedbackMul = 8ULL; /* TODO Use 4 instead of 8 to avoid windows LSB issues? */
/* Number of MCLK ticks in this SOF period (E.g = 125 * 24.576 = 3072) */
int count = (int) ((short)(u_tmp - lastClock));
unsigned long long full_result = count * feedbackMul * sampleFreq;
clockcounter += full_result;
/* Store MCLK for next time around... */
lastClock = u_tmp;
/* Reset counts based on SOF counting. Expect 16ms (128 HS SOFs/16 FS SOFS) per feedback poll
* We always count 128 SOFs, so 16ms @ HS, 128ms @ FS */
if(sofCount == 128)
{
sofCount = 0;
clockcounter += mod_from_last_time;
clocks = clockcounter / masterClockFreq;
mod_from_last_time = clockcounter % masterClockFreq;
if(usb_speed == XUD_SPEED_HS)
{
clocks <<= 3;
}
else
{
clocks <<= 6;
}
{
int usb_speed;
asm volatile("stw %0, dp[g_speed]"::"r"(clocks)); // g_speed = clocks
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
if (usb_speed == XUD_SPEED_HS)
{
fb_clocks[0] = clocks;
}
else
{
fb_clocks[0] = clocks >> 2;
}
}
clockcounter = 0;
}
#endif
break;
//Receive samples from host
case XUD_GetData_Select(c_aud_out, ep_aud_out, length, result):
num_samples_received_from_host = length / out_subslot_size;
//debug_printf("out samps: %d\n", num_samples_received_from_host);
outstanding_samples_to_host += num_samples_received_from_host;
int samples[MAX_OUT_SAMPLES_PER_SOF_PERIOD];
unpack_buff_to_samples(buffer_aud_out, num_samples_received_from_host, out_subslot_size, samples);
//Push into fifo for ASRC
//else debug_printf("Push\n");
//Tell ASRC manager what we have just sent
outuint(c_aud_host, num_samples_received_from_host); //We assume this will not block and other side always consumes
num_samples_to_send_to_host = inuint(c_aud_host); //get number of return samples for sending back to host
//Mark EP as ready for next frame from host
XUD_SetReady_OutPtr(ep_aud_out, (unsigned)buffer_aud_out);
break;
//Send samples to host
case XUD_SetData_Select(c_aud_in, ep_aud_in, result):
//debug_printf("sent data\n");
//Populate the input buffer ready for the next read
pack_samples_to_buff(asrc_to_host_sample_buffer, num_samples_to_send_to_host, in_subslot_size, buffer_aud_in);
//Use the number of samples we received last time so we are always balanced (assumes same in/out count)
unsigned input_buffer_size = num_samples_to_send_to_host * in_subslot_size;
XUD_SetReady_InPtr(ep_aud_in, (unsigned)buffer_aud_in, input_buffer_size); //loopback
num_samples_to_send_to_host = 0;
break;
}
}
}