From 3e0847553a5d514589116f8cf933d454a0db491c Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@staubsauger.localdomain>
Date: Tue, 4 Sep 2007 02:06:05 +0200
Subject: [PATCH] no byte reply anymore (due to ack and tcflush) -> incredible
 speedup!

---
 betty/fwflash.c |  7 ++++---
 betty/lpcload.c | 43 ++++++++-----------------------------------
 2 files changed, 12 insertions(+), 38 deletions(-)

diff --git a/betty/fwflash.c b/betty/fwflash.c
index fd8d31b..85a64fa 100644
--- a/betty/fwflash.c
+++ b/betty/fwflash.c
@@ -272,8 +272,11 @@ void flash_chip_erase(u8 bank) {
 		else
 			status=B2F;
 
-		if(status&0x80)
+		if(status&0x80) {
+			/* send an ack */
+			uart0_send_byte(status);
 			break;
+		}
 	}
 }
 
@@ -351,11 +354,9 @@ int receive_data_and_write_to_flash(u32 addr,u32 datalen) {
 	ret=0;
 	for(i=0;i<datalen/2;i++) {
 		byte=uart0_get_byte();
-		uart0_send_byte(byte);
 		data=byte;
 		cksm+=byte;
 		byte=uart0_get_byte();
-		uart0_send_byte(byte);
 		cksm+=byte;
 		data|=byte<<8;
 		if(flash_write(addr,data)<0)
diff --git a/betty/lpcload.c b/betty/lpcload.c
index e1e12b7..38d5386 100644
--- a/betty/lpcload.c
+++ b/betty/lpcload.c
@@ -556,6 +556,9 @@ int send_cmd(int sfd,u32 addr,u32 len,u8 cmd) {
 		cnt+=ret;
 	}
 
+	/* flush  */
+	tcflush(sfd,TCIOFLUSH);
+
 	return 0;
 }
 
@@ -563,7 +566,6 @@ int write_to_flash(t_lpc *lpc,u8 *buf,u32 addr,int len) {
 
 	int cnt,ret;
 	u8 cksml,cksmr;
-	u8 check;
 	int i;
 
 	/* prepare addr */
@@ -575,39 +577,6 @@ int write_to_flash(t_lpc *lpc,u8 *buf,u32 addr,int len) {
 	/* transfer data */
 	cnt=0;
 	cksml=0;
-	while(len) {
-		for(i=0;i<2;i++) {
-			while(1) {
-				ret=write(lpc->sfd,buf+cnt+i,1);
-				if(ret<0) {
-					perror("transmit flash content (w)");
-					return ret;
-				}
-				if(ret==1)
-					break;
-			}
-			while(1) {
-				ret=read(lpc->sfd,&check,1);
-				if(ret<0) {
-					perror("transmit flash content (r)");
-					return ret;
-				}
-				if(ret==1)
-					break;
-			}
-			if(buf[cnt+i]!=check)
-				printf("FATAL: write to flash (transfer)\n");
-		}
-		cksml+=buf[cnt];
-		cksml+=buf[cnt+1];
-		cnt+=2;
-		len-=2;
-	}
-
-
-	/*
-	cnt=0;
-	cksml=0;
 	while(len) {
 		ret=write(lpc->sfd,buf+cnt,len);
 		if(ret<0) {
@@ -619,7 +588,7 @@ int write_to_flash(t_lpc *lpc,u8 *buf,u32 addr,int len) {
 		len-=ret;
 		cnt+=ret;
 	}
-	*/
+
 
 	/* check ack */
 	while(1) {
@@ -931,6 +900,10 @@ int main(int argc,char **argv) {
 	if(lpc.info&FLASHFW) {
 		printf("writing firmware to flash ...\n");
 		send_cmd(lpc.sfd,0,'0',CMD_CHIP_ERASE);
+		/* ack */
+		ret=0;
+		while(!ret)
+			read(lpc.sfd,&ret,1);
 		lpc.roff=BANK0_ADDR;
 		firmware_to_mem(&lpc,FLASH);
 	}
-- 
2.20.1