spec-vuart: wait until TX is ready before transmitting a byte

ddec2e35 · root · Alessandro Rubini · ab412e32 · ddec2e35 · ddec2e35
Commit ddec2e35 authored May 31, 2012 by root Committed by Alessandro Rubini Jul 16, 2012
Hide whitespace changes
Inline Side-by-side

Showing with 2 additions and 0 deletions

spec-vuart.c tools/spec-vuart.c +1 -0

wb_uart.h tools/wb_uart.h +1 -0

No files found.
--- 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);
 }


--- 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