basic memory management and uart wait fix

[cortex-from-scratch] / uart.c

diff --git a/uart.c b/uart.c
index 93b2c91..a3905c4 100644 (file)
--- a/uart.c
+++ b/uart.c
@@ -43,6 +43,9 @@ void uart_init() {
 */
 }
 
+void wait() {
+       for (int i = 0; i < 100; i++);
+}
 
 extern void uart_putc(unsigned char ch) {
        
@@ -50,15 +53,16 @@ extern void uart_putc(unsigned char ch) {
                while (*USART1_SR & 0x0C) { } // transmit data register empty and complete
                *USART1_DR = 0x0D; // return line
        }
-       
-       while ((*USART1_SR & 0xFF) == 0x0C) {} // busy bit  
+
+
+       while (*USART1_SR & 0x0C) {} 
                *USART1_DR = ch;
 
-}
 
-void wait() {
-       for (int i = 0; i < 100; i++);
+       
+       wait();
 }
+
 extern void uart_puts(unsigned char *str)
 {
 
@@ -66,7 +70,6 @@ extern void uart_puts(unsigned char *str)
 
     for (i = 0; i < strlen(str); i++)
     {
-       wait();
         uart_putc(str[i]);
     }
 }