start firmware: Function definitions for ADC

stm-firmware/uart/uart.c

@@ -0,0 +1,44 @@
+/*
+ * uart.c
+ *
+ *  Created on: Dec 15, 2014
+ *      Author: shino-chan
+ */
+//USART2
+//PA2 => TX
+//PA3 => RX
+//Alternate Function 7
+#include <uart/uart.h>
+#include <stm32f4xx.h>
+
+void initUART() {
+	__DSB();
+	RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
+	RCC->APB1ENR |= RCC_APB1ENR_USART2EN;
+	__DSB();
+
+	GPIOA->MODER |= (1<<5);
+	GPIOA->AFR[0] |= (7<<8); //Enable Clock
+	GPIOA->MODER |= (1<<5);
+	GPIOA->AFR[0] |= (7<<8);
+	asm("nop");
+	asm("nop");
+	asm("nop");
+	USART2->BRR = 0x1117; //Baudrate  273.4375=>0x1117 9600baud bei 42MHz Periph
+	USART2->CR1 = USART_CR1_UE | USART_CR1_TE;
+
+}
+void sendChar(char c) {
+	while(!(USART2->SR & USART_SR_TXE));
+	USART2->DR = c;
+
+}
+void sendString(char* s, int count) {
+	int i = 0;
+	for (i = 0; i < count; i++,s++)
+	{
+		if (!(*s))
+			break;
+		sendChar(*s);
+	}
+}