1 files changed, 56 insertions, 0 deletions
diff --git a/mig_test/software/libhal/uart.c b/mig_test/software/libhal/uart.c
new file mode 100644
index 0000000..d1290b5
--- /dev/null
+++ b/mig_test/software/libhal/uart.c
@@ -0,0 +1,56 @@
+//#include <stdio.h>
+
+#include "peripherie.h"
+
+////////////////////////////////////////
+// common defines
+
+#define bit_is_set(mem, bv)               (mem & bv)
+#define bit_is_clear(mem, bv)             (!(mem & bv))
+#define loop_until_bit_is_set(mem, bv)    do {} while( bit_is_clear(mem, bv))
+#define loop_until_bit_is_clear(mem, bv)  do {} while( bit_is_set(mem, bv))
+
+
+////////////////////////////////////////
+// uart functions
+
+
+void uart_init( void)
+{
+    uart0->scaler = UART_SCALER;
+    uart0->ctrl   = UART_CONTROL_TX_ENABLE | UART_CONTROL_RX_ENABLE;
+}
+
+
+unsigned int uart_check_receiver()
+{
+    return ( bit_is_set( uart0->status, UART_STATUS_DATA_READY) != 0);
+}
+
+
+char uart_getchar()
+{
+    loop_until_bit_is_set(uart0->status, UART_STATUS_DATA_READY);
+    return uart0->data;
+}
+
+
+void uart_putchar_raw( char c)
+{
+    #if UART_FIFOSIZE==1 || !defined(UART_FIFOSIZE)
+    loop_until_bit_is_set( uart0->status, UART_STATUS_TX_REG_EMPTY);
+    #else
+    loop_until_bit_is_clear( uart0->status, UART_STATUS_TX_FIFO_FULL);
+    #endif
+    uart0->data = c;
+}
+
+
+char uart_putchar( char c)
+{
+    if (c == '\n') 
+        uart_putchar_raw( '\r');
+    uart_putchar_raw( c);
+    return 0;
+}
+