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Started to move iOS/iAP code from decouple to usb_buffer

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This commit is contained in:
Ross Owen
2013-03-07 16:05:45 +00:00
parent ec026e36db
commit bf58de3006
5 changed files with 160 additions and 171 deletions
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159
module_usb_audio/usb_buffer/usb_buffer.xc
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@@ -57,6 +57,13 @@ 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
extern unsigned int g_iap_to_host_buffer_A[MAX_IAP_PACKET_SIZE/4+4];
extern unsigned int g_iap_to_host_buffer_B[MAX_IAP_PACKET_SIZE/4+4];
extern int g_iap_from_host_buffer[MAX_IAP_PACKET_SIZE/4+4];
unsigned char gc_zero_buffer2[4];
#endif
unsigned char fb_clocks[16];
//#define FB_TOLERANCE_TEST
@@ -79,7 +86,8 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
#ifdef IAP
chanend c_iap_from_host,
chanend c_iap_to_host,
chanend c_iap_to_host_int,
chanend c_iap_to_host_int,
chanend c_iap,
#endif
#if defined(SPDIF_RX) || defined(ADAT_RX)
chanend ?c_int,
@@ -152,8 +160,8 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
#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);
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);
//xc_ptr zero_buffer = array_to_xc_ptr(g_zero_buffer);
int is_ack_iap;
@@ -292,6 +300,22 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
while(1)
{
{
int iap_reset;
GET_SHARED_GLOBAL(iap_reset, g_iap_reset);
if (iap_reset)
{
iap_send_reset(c_iap); // What if this happen in the middle of a send/ack?
iap_reset = 0;
iap_expecting_length = 1;
SET_SHARED_GLOBAL(g_iap_reset, iap_reset); // Reset has been signalled
iap_waiting_on_send_to_host = 0;
iap_data_collected_from_device = 0;
SET_SHARED_GLOBAL(g_iap_to_host_flag, 0);
}
}
/* Wait for response from XUD and service relevant EP */
select
{
@@ -585,6 +609,37 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
/* release the buffer */
SET_SHARED_GLOBAL(g_iap_from_host_flag, 1);
/* Check if host has sent us iap OUT data */
GET_SHARED_GLOBAL(iap_from_host_flag, g_iap_from_host_flag);
if (iap_from_host_flag)
{
/* The buffer() thread has filled up a buffer */
/* 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, iap_from_host_buffer);
// Send length first so iAP thread knows how much data to expect
// Don't expect ack from this to make it simpler
outuint(c_iap, iap_data_remaining_to_device);
/* Increment read pointer - buffer[0] is length */
iap_from_host_rdptr = iap_from_host_buffer + 4;
if (iap_data_remaining_to_device)
{
read_byte_via_xc_ptr(datum_iap, iap_from_host_rdptr);
outuint(c_iap, datum_iap);
iap_from_host_rdptr += 1;
iap_data_remaining_to_device -= 1;
}
}
}
break;
@@ -593,9 +648,40 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
asm("#iap d->h");
// ack the decouple thread to say it has been sent to host
SET_SHARED_GLOBAL(g_iap_to_host_flag, 1);
//SET_SHARED_GLOBAL(g_iap_to_host_flag, 1);
swap(iap_to_host_buffer, iap_to_host_waiting_buffer);
/* 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, iap_data_collected_from_device);
/* Swap the collecting and sending buffer */
swap(iap_to_host_buffer_being_collected, iap_to_host_buffer_being_sent);
/* Request to send packet */
XUD_SetReady_In(ep_iap_to_host_int, gc_zero_buffer2, 0); // ZLP to int ep
XUD_SetReady_InPtr(ep_iap_to_host, iap_to_host_buffer_being_sent+4, iap_data_collected_from_device);
/* 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;
}
break; /* IAP IN to host */
case XUD_SetData_Select(c_iap_to_host_int, ep_iap_to_host_int, tmp):
@@ -666,6 +752,71 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
}
break;
#endif /* ifdef MIDI */
#ifdef IAP
/* Received word from iap thread - Check for ACK or Data */
case iap_get_ack_or_reset_or_data(c_iap, is_ack_iap, is_reset, 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_OutPtr(ep_iap_from_host, iap_from_host_buffer+4);
}
else
{
/* Read another word from the fifo and output it to iap thread */
read_byte_via_xc_ptr(datum_iap, iap_from_host_rdptr);
outuint(c_iap, datum_iap);
iap_from_host_rdptr += 1;
iap_data_remaining_to_device -= 1;
}
}
else
{
/* The iap/uart thread has sent us some data - handshake back */
iap_send_ack(c_iap);
if (iap_expecting_length) {
iap_expecting_data_length = datum_iap;
iap_expecting_length = 0;
} else {
if (iap_data_collected_from_device < IAP_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) + iap_data_collected_from_device;
// Add data to the buffer
write_byte_via_xc_ptr(p, datum_iap);
iap_data_collected_from_device += 1;
}
else
{
// Too many events from device - drop
}
// If we are not sending data to the host then initiate it (ONLY IF GOT WHOLE MESSAGE)
if (!iap_waiting_on_send_to_host && (iap_data_collected_from_device == iap_expecting_data_length))
{
// Set first element of buffer to length i.e. iap_to_host_buffer_being_collected[0] = iap_data_collected_from_device;
write_via_xc_ptr(iap_to_host_buffer_being_collected, iap_data_collected_from_device);
swap(iap_to_host_buffer_being_collected, iap_to_host_buffer_being_sent);
// Signal other side to swap
XUD_SetReady_In(ep_iap_to_host_int, gc_zero_buffer2, 0);
XUD_SetReady_InPtr(ep_iap_to_host, iap_to_host_buffer_being_sent+4, iap_data_collected_from_device);
iap_data_collected_from_device = 0;
iap_waiting_on_send_to_host = 1;
iap_expecting_length = 1;
}
}
}
break;
#endif
}
}