Diff: usart.c

Revision:

0:c3a652eff606

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usart.c	Tue Apr 21 09:30:11 2015 +0000
@@ -0,0 +1,51 @@
+#include "usart.h"
+
+void USART_Initialise(void)
+{
+    USART_InitTypeDef usartConfig;
+
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,  ENABLE);
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,   ENABLE);
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
+    USART_Cmd(USART1, ENABLE); 
+
+    usartConfig.USART_BaudRate = 115200; 
+    usartConfig.USART_WordLength = USART_WordLength_8b; 
+    usartConfig.USART_StopBits = USART_StopBits_1; 
+    usartConfig.USART_Parity = USART_Parity_No;
+    usartConfig.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
+    usartConfig.USART_HardwareFlowControl =
+         USART_HardwareFlowControl_None;
+    USART_Init(USART1, &usartConfig);
+
+    GPIO_InitTypeDef gpioConfig;
+
+    //PA9 = USART1.TX => Alternative Function Output
+    gpioConfig.GPIO_Mode = GPIO_Mode_AF_PP;
+    gpioConfig.GPIO_Pin = GPIO_Pin_9;
+    gpioConfig.GPIO_Speed = GPIO_Speed_2MHz;
+    GPIO_Init(GPIOA, &gpioConfig);
+
+    //PA10 = USART1.RX => Input
+    gpioConfig.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+    gpioConfig.GPIO_Pin = GPIO_Pin_10;
+    GPIO_Init(GPIOA, &gpioConfig);
+}
+
+void USART_SendString(char* message)
+{
+    while(*message)
+    {
+        while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
+        USART_SendData(USART1, *message++);
+    }
+}
+
+unsigned char USART_ReadByteSync(USART_TypeDef *USARTx)
+{
+    while ((USARTx->SR & USART_SR_RXNE) == 0)
+    {
+    }
+
+    return (unsigned char)USART_ReceiveData(USARTx);
+}