USART still not working

bsl/csl/interfaces/usart.h

@@ -72,7 +72,7 @@ void usartSetBaudRate(uint32_t baud);
  * \param * USART_TypeDef usart 
  * \retval none
  */
-void usartSendChar(uint8_t ch); 
+void usartSendChar(int ch); 
 
 #ifdef __cplusplus
 }

bsl/csl/stm32f042/Src/usart.c

@@ -4,16 +4,45 @@
 
 
 #define USART2_EN (1U << 17)
-USART_TypeDef usart; 
+#define CR1_TE_EN (1U << 3)
+#define CR1_UE_EN (1U << 0)
 
+#define ISR_TXE (1U << 7)
+
+#define UART_BAUD 115200
+#define SYST_CLK 8000000
+
+
+void usartSetBaudRate(uint32_t baud);
 
 void usartInit()
 {
 	/* COnfiguring teh pins for the uart*/ 
-	pinConfig(pinA2, alternate, none, none, normal);
+	//pinConfig(pinA2, alternate, none, none, normal);
-	pinConfig(pinA15, alternate, none, none, normal);
+	//pinConfig(pinA15, alternate, none, none, normal);
-	pinSetAlternate(pinA2, 1);
+	
+	//Sets pina2 to alternate mode as UART_TX
+	//pinSetAlternate(pinA2, 1);
+	
+	GPIOA->MODER &= ~(1u <<4); 
+	GPIOA->MODER |= (1u <<5); 
+	
+	GPIOA->AFR[0] &= ~(1u<<11);
+	GPIOA->AFR[0] &= ~(1u<<10);
+	GPIOA->AFR[0] &= ~(1u<<9);
+	GPIOA->AFR[0] |= (1u<<8);
+
+	//Enable the priferas bus and UART
 	RCC->APB1ENR |= USART2_EN; 	
+
+	usartSetBaudRate(UART_BAUD);
+	
+	//enables the transmit and sets all the other values to 0 = Default 
+	USART2->CR1 = 0; // The = 0 is on purpose to set uart to default mode.    
+	USART2->CR1 |= CR1_TE_EN; // The = 0 is on purpose to set uart to default mode.    
+	
+	//UART Enable
+	USART2->CR1 |= CR1_UE_EN; 	
 }
 
 static uint16_t usartComputeBaudRate(uint32_t clk, uint32_t baud)
@@ -23,10 +52,12 @@ static uint16_t usartComputeBaudRate(uint32_t clk, uint32_t baud)
 
 void usartSetBaudRate(uint32_t baud)
 {
-	usartComputeBaudRate(baud, 8000000); 
+	USART2->BRR = usartComputeBaudRate(baud, SYST_CLK); 
 }
 
-void usartSendChar(uint8_t ch)
+void usartSendChar(int ch)
 {
-	
+	// Make sure that TX buffer is empty 
+	while(!(USART2->ISR & ISR_TXE)){}
+	USART2->TDR = (ch & 0xFF); 
 }

main.cpp

@@ -1,6 +1,7 @@
 #include"main.hpp"
 #include"bsl/csl/interfaces/delay.h"
 #include"stm32f0xx_csl.h"
+#include "usart.h"
 
 int main(int argc, char *argv[])
 {
@@ -11,11 +12,13 @@ int main(int argc, char *argv[])
 	
 	pinConfig(pinB3, output, pushPull, none, normal);
 	pinConfig(pinA0, input, pushPull, pullDown, normal);
+	usartInit(); 
 
 	for(i = 0 ; i < 10 ; i++)
 	{
 		delayMs(100); 
 		pinToggle(pinB3);
+		usartSendChar('y');
 		delayMs(100); 
 	}