Complete Write Functions in USART Lib

1 files changed, 9 insertions, 30 deletions

diff --git a/usart_irq/main.c b/usart_irq/main.c
index 8c79471..48ce18b 100644
--- a/usart_irq/main.c
+++ b/usart_irq/main.c
@@ -11,14 +11,13 @@
 
 
 #define DELAY 1000000
-#define RX_BUFFER_SIZE 50
-#define TX_BUFFER_SIZE 50
+#define RX_BUFFER_SIZE 1000
+#define TX_BUFFER_SIZE 1000
 
 
 void clock_init(void);
 void gpio_init(void);
 void delay(void);
-int _write(int file, char *ptr, int len);
 
 
 USART usart3;
@@ -26,20 +25,18 @@ USART usart3;
 
 int main(void)
 {
-	uint8_t rx_buffer[RX_BUFFER_SIZE];
-	uint8_t tx_buffer[TX_BUFFER_SIZE];
-
+	// setup
 	clock_init();
 	gpio_init();
+	uint8_t rx_buffer[RX_BUFFER_SIZE];
+	uint8_t tx_buffer[TX_BUFFER_SIZE];
 	usart_init(&usart3, rx_buffer, RX_BUFFER_SIZE, tx_buffer, TX_BUFFER_SIZE);
 
-	gpio_set(GPIOC, GPIO13);
-
-	char welcome[] = "Hello world!\r";
-	usart_write(&usart3, welcome);
+	// welcome message
+	usart_writeln(&usart3, "This is a demo of USART via IRQ. Just type something!");
 
+	// return any input
 	uint8_t buff;
-
 	while(1){
 		if (usart_read_bytes(&usart3, &buff, 1)){
 			usart_write_bytes(&usart3, &buff, 1);
@@ -60,6 +57,7 @@ void gpio_init(void)
 {
 	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
 	gpio_clear(GPIOC, GPIO13);
+	gpio_set(GPIOC, GPIO13);
 }
 
 
@@ -69,22 +67,3 @@ void delay(void)
 		__asm__("nop");
 	}
 }
-
-
-int _write(int file, char *ptr, int len)
-{
-	int i;
-
-	if (file == STDOUT_FILENO || file == STDERR_FILENO) {
-		for (i = 0; i < len; i++) {
-			if (ptr[i] == '\n') {
-				uint8_t cr = (uint8_t)'\r';
-				usart_write_bytes(&usart3, &cr, 1);
-			}
-			usart_write_bytes(&usart3, (uint8_t *)&ptr[i], 1);
-		}
-		return i;
-	}
-	errno = EIO;
-	return -1;
-}