From df96c7452593d06ccb9d9cb85ddcb886fe86d779 Mon Sep 17 00:00:00 2001
From: AceVest <zhaoyanbai@126.com>
Date: Mon, 3 Jun 2019 08:19:15 +0800
Subject: [PATCH] USART.md

---
 learn/doc/mac_bash_profile |  2 +-
 learn/stm32/USART.md       | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 learn/stm32/USART.md

diff --git a/learn/doc/mac_bash_profile b/learn/doc/mac_bash_profile
index e123bb7..6d3c43c 100644
--- a/learn/doc/mac_bash_profile
+++ b/learn/doc/mac_bash_profile
@@ -11,7 +11,7 @@ export PATH=$PATH:/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin
 export PATH=$PATH:$HOME/Library/Arduino15/packages/arduino/tools/avrdude/6.0.1-arduino5/bin
 export PATH=$PATH:/usr/local/opt/go/libexec/bin
 #多个GOPATH用';'分隔 go get会存到第一个目录
-export GOPATH=$HOME/go:$HOME/workspace/web/qossvr/
+export GOPATH=$HOME/workspace/go:$HOME/workspace/web/qossvr/
 export RTOS_PATH=$HOME/workspace/acecode/rtos/
 
 RED="\[\033[01;31m\]"
diff --git a/learn/stm32/USART.md b/learn/stm32/USART.md
new file mode 100644
index 0000000..080af4f
--- /dev/null
+++ b/learn/stm32/USART.md
@@ -0,0 +1,28 @@
+# USART
+
+
+# debug
+
+如果是用STM32CubeIDE生成的代码
+
+只需要在`usart.c`里添加如下几行
+
+```
+#include <stdio.h>
+#ifdef __GNUC__
+	#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
+#else
+	#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
+#endif
+PUTCHAR_PROTOTYPE
+{
+		HAL_UART_Transmit(&huart1 , (uint8_t *)&ch, 1, 0xFFFF);
+		return ch;
+}
+```
+
+生成代码的时候，选`USART1`，其它也可以，只是OneNetMiniBoard是`USART1`连到USB
+
+`Mode: Asynchronous`
+
+`Hadware Flow Control (RS233): Disable`
\ No newline at end of file
-- 
2.44.0