From 4ec412bf434ab5c837ea8e05a393ca517d9fb11d Mon Sep 17 00:00:00 2001
From: Kizarm <mrazik@volny.cz>
Date: Fri, 18 Oct 2024 19:45:45 +0200
Subject: [PATCH] baud zero divide

---
 V203/usb/ch32v203/usart.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/V203/usb/ch32v203/usart.cpp b/V203/usb/ch32v203/usart.cpp
index 30c17a8..5f168eb 100644
--- a/V203/usb/ch32v203/usart.cpp
+++ b/V203/usb/ch32v203/usart.cpp
@@ -69,6 +69,7 @@ uint32_t Usart::Down(const char * data, const uint32_t len) {
   return n;
 }
 void Usart::SetBaud (const uint32_t _baud) const {
+  if (_baud == 0u) return;                // ! zero divide
   const ONE_BIT b = USART1.CTLR1.B.UE;
   if (b == SET) USART1.CTLR1.B.UE = RESET;
   const uint32_t HCLK = SystemCoreClock;  // hodiny pro USART zde nejsou děleny