From 694257c5acdabc8c1cf3da6bff2653723bfd1d03 Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Mon, 21 Mar 2022 21:53:08 +0100
Subject: [PATCH] Uart: add receive

---
 uart.c | 7 +++++++
 uart.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/uart.c b/uart.c
index 4df3466..47e5e07 100644
--- a/uart.c
+++ b/uart.c
@@ -36,6 +36,13 @@ void uart_init(void )
 	UART0_CR = 0x301; //Active Tx, Rx & FIFO
 }
 
+char uart_recv(void)
+{
+	while (UART0_FR & (1 << 4)) {
+	}
+	return UART0_DR & 0xFF;
+}
+
 void putc(char c){
 	//FIFO Full?
 	while(UART0_FR & (1<<5)){}
diff --git a/uart.h b/uart.h
index c6bbf1e..59888a0 100644
--- a/uart.h
+++ b/uart.h
@@ -12,5 +12,6 @@
 #define UART0_ICR (*(volatile unsigned *)(UART0_BASE + 0x44))
 
 void uart_init(void);
+char uart_recv(void);
 void putc(char c);
 void puts(const char *s);