Initial commit

uart/uart.c

@@ -0,0 +1,23 @@
+#include "uart.h"
+
+int uart_rx_available() {
+  return (*UART_STATUS & UART_STATUS_RXNE_msk) != 0;
+}
+
+int uart_tx_available() {
+  return (*UART_STATUS & UART_STATUS_TXE_msk) != 0;
+}
+
+void uart_write(const char c) {
+  while (!uart_tx_available()) {
+  }
+
+  *UART_DATA = c;
+}
+
+char uart_read() {
+  while (!uart_rx_available()) {
+  }
+
+  return *UART_DATA;
+}