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Simplification of IAP receive data case

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Ross Owen
2013-03-07 16:53:51 +00:00
parent 99fec446e6
commit 609d210efd
1 changed files with 9 additions and 28 deletions
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37
module_usb_audio/usb_buffer/usb_buffer.xc
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@@ -60,7 +60,7 @@ int g_midi_from_host_buffer[MAX_USB_MIDI_PACKET_SIZE/4+4];
#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];
unsigned int g_iap_from_host_buffer[MAX_IAP_PACKET_SIZE/4+4];
unsigned char gc_zero_buffer2[4];
unsigned g_iap_reset = 1;
unsigned g_iap_from_host_flag = 0;
@@ -165,10 +165,9 @@ 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 zero_buffer = array_to_xc_ptr(g_zero_buffer);
xc_ptr iap_from_host_buffer = array_to_xc_ptr(g_iap_from_host_buffer);
int is_ack_iap;
int is_reset;
@@ -182,7 +181,6 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
int iap_expecting_length = 1;
int iap_expecting_data_length = 0;
xc_ptr iap_from_host_buffer =0;
//xc_ptr iap_to_host_buffer = 0;
//xc_ptr iap_to_host_waiting_buffer = 0;
#endif
@@ -247,11 +245,6 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
swap(midi_to_host_buffer, midi_to_host_waiting_buffer);
#endif
#ifdef IAP
// get the two buffers to use for iap device->host
asm("ldaw %0, dp[g_iap_from_host_buffer]":"=r"(iap_from_host_buffer));
#endif
#ifdef OUTPUT
SET_SHARED_GLOBAL(g_aud_from_host_flag, 1);
#endif
@@ -275,7 +268,6 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
}
else
{
XUD_SetReady_In(ep_aud_fb, fb_clocks, 3);
}
}
@@ -295,6 +287,8 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
while(1)
{
#ifdef IAP
#warning TIDY ME UP!!
{
int iap_reset;
GET_SHARED_GLOBAL(iap_reset, g_iap_reset);
@@ -309,6 +303,7 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
SET_SHARED_GLOBAL(g_iap_to_host_flag, 0);
}
}
#endif
/* Wait for response from XUD and service relevant EP */
@@ -599,22 +594,13 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
case XUD_GetData_Select(c_iap_from_host, ep_iap_from_host, tmp):
asm("#iap h->d");
if(tmp >= 0)
{
{
/* Stick length in beginning of buffer.. */
write_via_xc_ptr(iap_from_host_buffer, tmp);
/* 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);
//read_via_xc_ptr(iap_data_remaining_to_device, iap_from_host_buffer);
iap_data_remaining_to_device = tmp;
// Send length first so iAP thread knows how much data to expect
// Don't expect ack from this to make it simpler
@@ -630,11 +616,6 @@ void buffer(register chanend c_aud_out, register chanend c_aud_in, chanend c_aud
iap_from_host_rdptr += 1;
iap_data_remaining_to_device -= 1;
}
}
}
break;