- refactored libsys

- added critical section
- added interrupt global enable/disable
- added console::getInstanveByName



git-svn-id: http://moon:8086/svn/mips@76 a8ebac50-d88d-4704-bea3-6648445a41b3

src/libsys/uart.c

@@ -20,6 +20,18 @@ uart_if_t uart_if[2] =
 // ------------------------------------
 // Low-level I/O
 // ------------------------------------
+#define CALC_BAUD(b) \
+	((uint32_t)((float)CPU_FREQ_HZ/(16*b) + 0.5f) - 1);
+
+void UART_setbaud(void const *pInst, uint32_t baudrate)
+{
+	assert(pInst);
+	
+	uart_if_t *pReg = (uart_if_t*)pInst;
+
+	*pReg->pBAUD = CALC_BAUD(baudrate);
+}
+
 int UART_readchar(void const *pInst)
 {
 	assert(pInst);