From 6982ac2612c12af9fa65437bf4279007d734cc59 Mon Sep 17 00:00:00 2001
From: "adam@algroup.co.uk"
 <adam@algroup.co.uk@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Fri, 29 Jan 2010 09:28:47 +0000
Subject: [PATCH] fix USB send data timing issue in
 CMD_DOWNLOADED_SIM_SAMPLES_125K

---
 armsrc/appmain.c |  3 +++
 client/command.c | 26 +++++++++++++++++---------
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 674c8917..4321d946 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -716,9 +716,12 @@ void UsbPacketReceived(BYTE *packet, int len)
 		}
 
 		case CMD_DOWNLOADED_SIM_SAMPLES_125K: {
+			UsbCommand ack;
 			BYTE *b = (BYTE *)BigBuf;
 			memcpy(b+c->arg[0], c->d.asBytes, 48);
 			//Dbprintf("copied 48 bytes to %i",b+c->arg[0]);
+			ack.cmd = CMD_ACK;
+			UsbSendPacket((BYTE*)&ack, sizeof(ack));
 			break;
 		}
 
diff --git a/client/command.c b/client/command.c
index 8ecbc684..0d954258 100644
--- a/client/command.c
+++ b/client/command.c
@@ -688,6 +688,7 @@ static void CmdLosim(char *str)
 	/* convert to bitstream if necessary */
 	ChkBitstream(str);
 
+	PrintToScrollback("Sending data, please wait...");
 	for (i = 0; i < GraphTraceLen; i += 48) {
 		UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 		int j;
@@ -695,8 +696,10 @@ static void CmdLosim(char *str)
 			c.d.asBytes[j] = GraphBuffer[i+j];
 		}
 		SendCommand(&c);
+		wait_for_response(CMD_ACK);
 	}
 
+	PrintToScrollback("Starting simulator...");
 	UsbCommand c={CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 	SendCommand(&c);
 }
@@ -3063,14 +3066,19 @@ void UsbCommandReceived(UsbCommand *c)
 	/* Maybe it's a response: */
 	switch(current_command) {
 		case CMD_DOWNLOAD_RAW_ADC_SAMPLES_125K:
-		if (c->cmd != CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K) goto unexpected_response;
-		int i;
-		for(i=0; i<48; i++) sample_buf[i] = c->d.asBytes[i];
-		received_command = c->cmd;
-		return;
-	default:
-	unexpected_response:
-		PrintToScrollback("unrecognized command %08x\n", c->cmd);
-		break;
+			if (c->cmd != CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K) goto unexpected_response;
+			int i;
+			for(i=0; i<48; i++) sample_buf[i] = c->d.asBytes[i];
+			received_command = c->cmd;
+			return;
+		case CMD_DOWNLOADED_SIM_SAMPLES_125K:
+			if (c->cmd != CMD_ACK) goto unexpected_response;
+			// got ACK
+			received_command = c->cmd;
+			return;
+		default:
+		unexpected_response:
+			PrintToScrollback("unrecognized command %08x\n", c->cmd);
+			break;
 	}
 }
-- 
2.39.2