From ddec2e353f2eddad578001d7da64dedea945bb60 Mon Sep 17 00:00:00 2001
From: root <root@abpc10765.cern.ch>
Date: Thu, 31 May 2012 14:54:23 +0200
Subject: [PATCH] spec-vuart: wait until TX is ready before transmitting a byte
---
tools/spec-vuart.c | 1 +
tools/wb_uart.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/tools/spec-vuart.c b/tools/spec-vuart.c
index 9dfc771..ae998b2 100644
--- a/tools/spec-vuart.c
+++ b/tools/spec-vuart.c
@@ -26,6 +26,7 @@ int vc_rx(void *ptr)
void vc_tx(void *ptr, int c)
{
+ while( *(int *)(ptr + UART_REG_SR) & UART_SR_RX_RDY);
*(int *)(ptr + UART_REG_HOST_TDR) = UART_HOST_TDR_DATA_W(c);
}
diff --git a/tools/wb_uart.h b/tools/wb_uart.h
index 80c103a..c5801ef 100644
--- a/tools/wb_uart.h
+++ b/tools/wb_uart.h
@@ -85,6 +85,7 @@
#define UART_HOST_RDR_COUNT_W(value) WBGEN2_GEN_WRITE(value, 9, 16)
#define UART_HOST_RDR_COUNT_R(reg) WBGEN2_GEN_READ(reg, 9, 16)
+#define UART_REG_SR 0x0
#define UART_REG_HOST_TDR 0x10
#define UART_REG_HOST_RDR 0x14
--
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