[stm32] have the debug io code call into the uart drivers

platform/stm32f1xx/debug.c

@@ -24,7 +24,6 @@
 #include <reg.h>
 #include <debug.h>
 #include <printf.h>
-#include <lib/cbuf.h>
 #include <kernel/thread.h>
 #include <platform/debug.h>
 #include <arch/ops.h>
@@ -34,8 +33,6 @@
 #include <stm32f10x_usart.h>
 #include <arch/arm/cm3.h>
 
-static cbuf_t debug_rx_buf;
-
 void stm32_debug_early_init(void)
 {
 	uart_init_early();
@@ -49,10 +46,18 @@ void stm32_debug_init(void)
 
 void _dputc(char c)
 {
+	if (c == '\n')
+		uart_putc(DEBUG_UART, '\r');
+	uart_putc(DEBUG_UART, c);
 }
 
 int dgetc(char *c, bool wait)
 {
+	int ret = uart_getc(DEBUG_UART, wait);
+	if (ret == -1)
+		return -1;
+	*c = ret;
+	return 0;
 }
 
 void platform_halt(void)