From e148ef785c328610b9400a6d6edaf5df7c9d4af0 Mon Sep 17 00:00:00 2001
From: Rutherther <rutherther@ditigal.xyz>
Date: Thu, 5 Dec 2024 16:18:37 +0100
Subject: [PATCH] feat(arm04): rounding

---
 arm04/src/uart.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/arm04/src/uart.c b/arm04/src/uart.c
index 8b1a279..e757953 100644
--- a/arm04/src/uart.c
+++ b/arm04/src/uart.c
@@ -16,9 +16,14 @@ void usart_configure_speed(uart_t *uart, uint32_t clock_freq,
   uint32_t mantissa = temp / 16;
   uint32_t fraction = temp % 16;
 
-  if (fraction == 15 && ((temp + 8) % 16) == 0) {
-    mantissa++;
-    fraction = 0;
+  // rounding
+  if (((temp + 8) % 16) == 0) {
+    if (fraction == 15) {
+      mantissa++;
+      fraction = 0;
+    } else {
+      fraction++;
+    }
   }
 
   uart->periph->BRR = (mantissa << USART_BRR_DIV_Mantissa_Pos) | (fraction << USART_BRR_DIV_Fraction_Pos);
-- 
2.48.1