USART Rx is wroking, fixed yet another bug in pin.c ^-^

bsl/csl/interfaces/ascii.h

@@ -0,0 +1,60 @@
+/**
+  **************************************************************************************************
+  * @file		ascii.h
+  * @author		Kerem Yollu
+  * @date		04.11.2021
+  * @version	1.0
+  ************************************************************************************************** 
+  * @brief		Defines ofr ascii chars. 	
+  * 
+  **************************************************************************************************
+*/
+
+#ifndef _ASCII_H_
+#define _ASCII_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#define ASCII_NULL	0   // Null character 
+#define ASCII_SOH	1   // Start of Header 
+#define ASCII_STX	2   // Start of Text 
+#define ASCII_ETX	3   // End of Text, hearts card suit 
+#define ASCII_EOT	4   // End of Transmission, diamonds card suit 
+#define ASCII_ENQ	5   // Enquiry, clubs card suit 
+#define ASCII_ACK	6   // Acknowledgement, spade card suit 
+#define ASCII_BEL	7   // Bell 
+#define ASCII_BS	8   // Backspace 
+#define ASCII_HT	9   // Horizontal Tab 
+#define ASCII_LF	10  // Line feed 
+#define ASCII_VT	11  // Vertical Tab, male symbol, symbol for Mars 
+#define ASCII_FF	12  // Form feed, female symbol, symbol for Venus 
+#define ASCII_CR	13  // Carriage return 
+#define ASCII_SO	14  // Shift Out 
+#define ASCII_SI	15  // Shift In 
+#define ASCII_DLE	16  // Data link escape 
+#define ASCII_DC1	17  // Device control 1 
+#define ASCII_DC2	18  // Device control 2 
+#define ASCII_DC3	19  // Device control 3 
+#define ASCII_DC4	20  // Device control 4 
+#define ASCII_NAK	21  // NAK Negative-acknowledge 
+#define ASCII_SYN	22  // Synchronous idle 
+#define ASCII_ETB	23  // End of trans. block 
+#define ASCII_CAN	24  // Cancel 
+#define ASCII_EM	25  // End of medium 
+#define ASCII_SUB	26  // Substitute 
+#define ASCII_ESC	27  // Escape 
+#define ASCII_FS	28  // File separator 
+#define ASCII_GS	29  // Group separator 
+#define ASCII_RS	30  // Record separator 
+#define ASCII_US	31  // Unit separator 
+#define ASCII_DEL	127 // Delete 
+#define ASCII_space	32  // Space 
+#define ASCII_nbsp	255 // Non-breaking space or no-break space 
+#define ASCII_clear	"\033[2J" // Clear screen command 
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _ASCII_H_

bsl/csl/interfaces/usart.h

@@ -120,19 +120,29 @@ void usartSetHwFlowCtrl(usartNo_t channel, usartHwFlowCtrl_t flowCtrl);
 
 /** 
  * \brief Sends a char array until \0 is detected.  
+ * \param usartNo_t channel,  
  * \param *ptr pointer to char array 
  * \retval none
  */
-void print_Usart(char *ptr); 
+void print_Usart(usartNo_t channel,char *ptr); 
 
 /** 
- * \brief Cheks id send buffer is empty an than Sends one Char  
+ * \brief Cheks if the send buffer is empty an than Sends one Char  
+ * \param usartNo_t channel,  
  * \param uint8_t ch one Character.  
  * \retval none
  */
-void usartSendChar(uint8_t ch); 
+void usartSendChar(usartNo_t channel, uint8_t ch); 
 
 
+/** 
+ * \brief Cheks if the recieve buffer is NOT empty an than Rreturns the recieved Char  
+ * \param usartNo_t channel,  
+ * \param uint8_t ch one Character.  
+ * \retval none
+ */
+uint8_t usartGetChar(usartNo_t channel); 
+
 #ifdef __cplusplus
 }
 #endif

bsl/csl/stm32f042/Src/pin.c

@@ -120,14 +120,14 @@ void pinSetSpeed(pinNo_t pinNo, pinSpeed_t speed)
  
 void pinSetAlternate(pinNo_t pinNo, uint16_t alternate)
 {
-	if(PIN_NO < 7)
+	if(PIN_NO < 8)
 	{
 		PIN_BASE->AFR[0] &= ~(0x0F << (PIN_NO * 4));
 		PIN_BASE->AFR[0] |= ((alternate & 0x0F) << (PIN_NO * 4));
 		return; 
 	}
-	PIN_BASE->AFR[1] &= ~(0x0F << (PIN_NO * 4));
-	PIN_BASE->AFR[1] |= ((alternate & 0x0F) << (PIN_NO * 4));
+	PIN_BASE->AFR[1] &= ~(0x0F << ((PIN_NO-8) * 4));
+	PIN_BASE->AFR[1] |= ((alternate & 0x0F) << ((PIN_NO-8) * 4));
 }
 
 void pinConfig(pinNo_t pinNo, pinMode_t mode, pinStage_t stage, pinPullUpDown_t resistance, pinSpeed_t speed)

bsl/csl/stm32f042/Src/usart.c

@@ -35,11 +35,11 @@ void usartInit(	usartNo_t channel,
 				uint8_t parity, 
 				usartHwFlowCtrl_t flowCtrl)
 {
-	/* COnfiguring teh pins for the uart*/ 
+	/* Configuring the pins for the uart*/ 
 	usartInitTx(pinTx);
 	usartInitRx(pinRx);
 		
-	//Enable the UART Module on the periferal bus this must be done before setting any regiter. 
+	//Enable the UART Module on the periferal bus this must be done before setting any register.
 	if(channel == usart2)
 	{
 		RCC->APB1ENR |= RCC_APB1ENR_USART2EN; 
@@ -54,26 +54,29 @@ void usartInit(	usartNo_t channel,
 	USART_CHANNEL->CR2 = 0; // The = 0 is on purpose to set uart to default mode.    
 	USART_CHANNEL->CR3 = 0; // The = 0 is on purpose to set uart to default mode.   
 
-	USART_CHANNEL->CR1 |= USART_CR1_TE; //Enbale trasnmit  
-	USART_CHANNEL->CR1 |= USART_CR1_RE; //Enable recieve
 	
 	usartSetBaudRate(channel,baud);
 	usartSetWordLenght(channel, lenght);
 	usartSetHwFlowCtrl(channel, flowCtrl);
 
-	//UART Enable shall be allwas date a th ene of configuration. 
+	USART_CHANNEL->CR1 |= USART_CR1_TE; //Enbale trasnmit  
+	USART_CHANNEL->CR1 |= USART_CR1_RE; //Enable recieve
+	
+	//UART Enable shall allwas be at the end of configuration. 
 	USART_CHANNEL->CR1 |= USART_CR1_UE; 	
 }
 
 void usartInitTx(pinNo_t pinTx)
 {
-	pinConfig(pinTx, alternate, def_stage, def_res, def_speed);
+	//pinConfig(pinTx, alternate, def_stage, def_res, def_speed);
+	pinSetMode(pinTx,alternate); 
 	pinSetAlternate(pinTx, AF1);
 }	
 
 void usartInitRx(pinNo_t pinRx)
 {
-	pinConfig(pinRx, alternate, def_stage, def_res, def_speed);
+	//pinConfig(pinRx, alternate, def_stage, def_res, def_speed);
+	pinSetMode(pinRx,alternate); 
 	pinSetAlternate(pinRx, AF1);
 }	
 
@@ -130,20 +133,27 @@ void usartSetHwFlowCtrl(usartNo_t channel, usartHwFlowCtrl_t flowCtrl)
 	}
 }	
 
-void print_Usart(char *ptr)
+void print_Usart(usartNo_t channel,char *ptr) 
 {
 	uint16_t len = 0; 
 	
 	while(ptr[len] != '\0')
 	{
-		usartSendChar(ptr[len]);
+		usartSendChar(channel, ptr[len]);
 		len++;
 	}
 }
 
-void usartSendChar(uint8_t ch)
+void usartSendChar(usartNo_t channel, uint8_t ch)
+{
+	// Make sure that TX buffer is empty 
+	while(!(USART_CHANNEL->ISR & USART_ISR_TXE)){}
+	USART_CHANNEL->TDR = ch; 
+}
+
+uint8_t usartGetChar(usartNo_t channel)
 {
 	// Make sure that TX buffer is empty 
-	while(!(USART2->ISR & USART_ISR_TXE)){}
-	USART2->TDR = ch; 
+	while(!(USART_CHANNEL->ISR & USART_ISR_RXNE)){}
+	return USART_CHANNEL->RDR; 
 }

main.cpp

@@ -2,11 +2,12 @@
 #include "delay.h"
 #include "stm32f0xx_csl.h"
 #include "usart.h"
+#include "ascii.h"
 
 int main(int argc, char *argv[])
 {
 	uint8_t i = 0; 
-
+	uint8_t a = '0';
 	stmStart();
 	
 	pinConfig(pinB3, output, pushPull, def_res, def_speed);
@@ -19,7 +20,9 @@ int main(int argc, char *argv[])
 				NO_PARITY_CTRL,
 				noFlowControl); 
 
-	print_Usart("Wellcome to our KED project\n\r"); 
+//	print_Usart(usart2, ASCII_clear); 
+	print_Usart(usart2, "Wellcome to our KED project\n\r"); 
+	
 
 	for(i = 0 ; i < 10 ; i++)
 	{
@@ -29,10 +32,14 @@ int main(int argc, char *argv[])
 	}
 	
 	pinWrite(pinB3,0);
-
+	
+	//usartSendChar(usart2, a);		
 	while(1)
 	{
-		if(pinRead(pinA0))
+		a =	usartGetChar(usart2); 
+		usartSendChar(usart2, a);			
+
+		if(a == '1')
 		{
 			pinWrite(pinB3,1);
 		}
@@ -40,6 +47,18 @@ int main(int argc, char *argv[])
 		{
 			pinWrite(pinB3,0);
 		}	
+
+/*
+		if(pinRead(pinA0))
+		{
+			pinWrite(pinB3,1);
+		}
+		else 
+		{
+			pinWrite(pinB3,0);
+		}
+	*/	
+		delayMs(100); 
 	}
 	return 1;
 }