[mips]

- libsys multitarget
- apps multitarget

git-svn-id: http://moon:8086/svn/mips@67 a8ebac50-d88d-4704-bea3-6648445a41b3

src/libsys/uart.c

@@ -0,0 +1,44 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+#include <assert.h>
+#include <board.h>
+#include "uart.h"
+
+// ---------------------------------------------------------------------------------
+// Globals
+// ---------------------------------------------------------------------------------
+uart_if_t uart_if[2] =
+{
+	{(uint32_t*)SYS_UART0_STAT, (uint32_t*)SYS_UART0_DATA, (uint32_t*)SYS_UART0_BAUD},
+	{(uint32_t*)SYS_UART1_STAT, (uint32_t*)SYS_UART1_DATA, (uint32_t*)SYS_UART1_BAUD}
+};
+
+// ------------------------------------
+// Low-level I/O
+// ------------------------------------
+int UART_readchar(void const *pInst)
+{
+	assert(pInst);
+	
+	uart_if_t *pReg = (uart_if_t*)pInst;
+
+	if (SYS_UART_BIT_RX_AVAIL & *pReg->pCTRL)
+		return (*pReg->pDATA & 0xFF);
+
+	return -1;
+}
+
+void UART_writechar(void const *pInst, char c)
+{
+	assert(pInst);
+
+	uart_if_t *pReg = (uart_if_t*)pInst;
+
+	while((SYS_UART_BIT_TX_HALFFULL & *pReg->pCTRL) != 0);
+
+	*pReg->pDATA = (uint32_t)c;
+}