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Copied midi buffering to iap buffering.

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This commit is contained in:
Russell Gallop
2011-07-29 12:19:18 +01:00
parent 3a611fe375
commit 17babda9e5
4 changed files with 260 additions and 7 deletions
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181
module_usb_aud_shared/usb_buffer/decouple.xc
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@@ -4,6 +4,8 @@
#include "xc_ptr.h"
#define NO_INLINE_MIDI_SELECT_HANDLER 1
#include "usb_midi.h"
#define NO_INLINE_IAP_SELECT_HANDLER 1
#include "iAP.h"
#include "devicedefines.h"
#include "testct_byref.h"
#include "interrupt.h"
@@ -147,17 +149,36 @@ static inline void swap(xc_ptr &a, xc_ptr &b)
}
// shared global midi buffering variables
#ifdef MIDI
unsigned g_midi_from_host_flag = 0;
unsigned g_midi_to_host_flag = 0;
int midi_to_host_usb_ep = 0;
int midi_from_host_usb_ep = 0;
#endif
#ifdef IAP
unsigned g_iap_from_host_flag = 0;
unsigned g_iap_to_host_flag = 0;
int iap_to_host_usb_ep = 0;
int iap_to_host_int_usb_ep = 0;
int iap_from_host_usb_ep = 0;
#endif
int aud_from_host_usb_ep = 0;
int aud_to_host_usb_ep = 0;
int int_usb_ep = 0;
#ifdef MIDI
unsigned int g_midi_to_host_buffer_A[MAX_USB_MIDI_PACKET_SIZE/4+4];
unsigned int g_midi_to_host_buffer_B[MAX_USB_MIDI_PACKET_SIZE/4+4];
int g_midi_from_host_buffer[MAX_USB_MIDI_PACKET_SIZE/4+4];
#endif
#ifdef IAP
unsigned int g_iap_to_host_buffer_A[MAX_IAP_PACKET_SIZE/4+4];
unsigned int g_iap_to_host_buffer_B[MAX_IAP_PACKET_SIZE/4+4];
int g_iap_from_host_buffer[MAX_IAP_PACKET_SIZE/4+4];
#endif
// shared global aud buffering variables
@@ -610,7 +631,7 @@ void check_for_interrupt(chanend ?c_clk_int) {
#pragma unsafe arrays
void decouple(chanend c_mix_out,
chanend ?c_midi, chanend ?c_clk_int)
chanend ?c_midi, chanend ?c_clk_int, chanend ?c_iap)
{
unsigned sampFreq = DEFAULT_FREQ;
int aud_from_host_flag=0;
@@ -630,9 +651,23 @@ void decouple(chanend c_mix_out,
int midi_waiting_on_send_to_host = 0;
int midi_to_host_flag = 0;
int midi_from_host_flag = 0;
#endif
#ifdef IAP
xc_ptr iap_from_host_rdptr;
xc_ptr iap_from_host_buffer;
xc_ptr iap_to_host_buffer_being_sent = array_to_xc_ptr(g_iap_to_host_buffer_A);
xc_ptr iap_to_host_buffer_being_collected = array_to_xc_ptr(g_iap_to_host_buffer_B);
int is_ack_iap;
unsigned int datum_iap;
int iap_data_remaining_to_device = 0;
int iap_data_collected_from_device = 0;
int iap_waiting_on_send_to_host = 0;
int iap_to_host_flag = 0;
int iap_from_host_flag = 0;
#endif
int t = array_to_xc_ptr(outAudioBuff);
int aud_in_ready = 0;
@@ -701,6 +736,22 @@ void decouple(chanend c_mix_out,
XUD_SetReady(midi_from_host_usb_ep, 1);
#endif
#ifdef IAP
//asm("ldaw %0, dp[g_iap_to_host_buffer]":"=r"(iap_to_host_buffer));
asm("ldaw %0, dp[g_iap_from_host_buffer]":"=r"(iap_from_host_buffer));
// wait for usb_buffer to set up
while(!iap_from_host_flag) {
GET_SHARED_GLOBAL(iap_from_host_flag, g_iap_from_host_flag);
}
iap_from_host_flag = 0;
SET_SHARED_GLOBAL(g_iap_from_host_flag, iap_from_host_flag);
// send the current host -> device buffer out of the fifo
XUD_SetReady(iap_from_host_usb_ep, 1);
#endif
#ifdef OUTPUT
// wait for usb_buffer to set up
while(!aud_from_host_flag) {
@@ -1113,6 +1164,130 @@ void decouple(chanend c_mix_out,
break;
}
#endif // MIDI
#ifdef IAP
/* Check if buffer() has send IAP packet to host */
GET_SHARED_GLOBAL(iap_to_host_flag, g_iap_to_host_flag);
if (iap_to_host_flag)
{
/* The buffer has been sent to the host, so we can ack the iap thread */
SET_SHARED_GLOBAL(g_iap_to_host_flag, 0);
if (iap_data_collected_from_device != 0)
{
/* We have some more data to send set the amount of data to send */
write_via_xc_ptr(iap_to_host_buffer_being_collected, midi_data_collected_from_device);
/* Swap the collecting and sending buffer */
swap(iap_to_host_buffer_being_collected, midi_to_host_buffer_being_sent);
{
/* Request to send packet */
int len;
asm("ldw %0, %1[0]":"=r"(len):"r"(iap_to_host_buffer_being_sent));
XUD_SetReady_In(iap_to_host_usb_ep, 0, midi_to_host_buffer_being_sent+4, len);
}
/* Mark as waiting for host to poll us */
iap_waiting_on_send_to_host = 1;
/* Reset the collected data count */
iap_data_collected_from_device = 0;
}
else
{
iap_waiting_on_send_to_host = 0;
}
continue;
}
else
{
/* Check if host has sent us iap OUT data */
GET_SHARED_GLOBAL(iap_from_host_flag, g_midi_from_host_flag);
if (iap_from_host_flag)
{
/* The buffer() thread has filled up a buffer */
int datalength;
int space_left;
/* Reset flag */
SET_SHARED_GLOBAL(g_iap_from_host_flag, 0);
/* Read length from buffer[0] */
read_via_xc_ptr(iap_data_remaining_to_device, midi_from_host_buffer);
/* Increment read pointer - buffer[0] is length */
iap_from_host_rdptr = midi_from_host_buffer + 4;
if (iap_data_remaining_to_device)
{
read_via_xc_ptr(datum_iap, iap_from_host_rdptr);
outuint(c_iap, datum_iap);
iap_from_host_rdptr += 4;
iap_data_remaining_to_device -= 4;
}
}
}
select
{
/* Received word from iap thread - Check for ACK or Data */
case iap_get_ack_or_data(c_midi, is_ack_iap, datum_iap):
if (is_ack_iap)
{
/* An ack from the iap/uart thread means it has accepted some data we sent it
* we are okay to send another word */
if (iap_data_remaining_to_device == 0)
{
/* We have read an entire packet - Mark ready to receive another */
XUD_SetReady(iap_from_host_usb_ep, 1);
}
else
{
/* Read another word from the fifo and output it to iap thread */
read_via_xc_ptr(datum_iap, iap_from_host_rdptr);
outuint(c_iap, datum_iap);
iap_from_host_rdptr += 4;
iap_data_remaining_to_device -= 4;
}
}
else
{
/* The iap/uart thread has sent us some data - handshake back */
iap_send_ack(c_midi);
if (iap_data_collected_from_device < MIDI_USB_BUFFER_TO_HOST_SIZE)
{
/* There is room in the collecting buffer for the data */
xc_ptr p = (iap_to_host_buffer_being_collected + 4) + midi_data_collected_from_device;
// Add data to the buffer
write_via_xc_ptr(p, datum_iap);
iap_data_collected_from_device += 4;
}
else
{
// Too many events from device - drop
}
// If we are not sending data to the host then initiate it
if (!iap_waiting_on_send_to_host)
{
write_via_xc_ptr(iap_to_host_buffer_being_collected, midi_data_collected_from_device);
iap_data_collected_from_device = 0;
swap(iap_to_host_buffer_being_collected, midi_to_host_buffer_being_sent);
// Signal other side to swap
{
int len;
asm("ldw %0, %1[0]":"=r"(len):"r"(iap_to_host_buffer_being_sent));
XUD_SetReady_In(iap_to_host_usb_ep, 0, midi_to_host_buffer_being_sent+4, len);
}
iap_waiting_on_send_to_host = 1;
}
}
break;
default:
break;
}
#endif // MIDI
}
}