1 files changed, 40 insertions, 0 deletions
diff --git a/src/rs232.c b/src/rs232.c
new file mode 100644
index 0000000..f4cf404
--- /dev/null
+++ b/src/rs232.c
@@ -0,0 +1,40 @@
+#include "rs232.h"
+#include <xc.h>
+
+void eusart_init(void) {
+    
+    // set Async and 8 bits frame
+    TXSTAbits.SYNC = 0;
+    TXSTAbits.TX9 = 0;
+    
+    // 9600 baud prescaler
+    RCSTAbits.SPEN = 1;
+    SPBRG = 129;
+    TXSTAbits.BRGH = 1;
+    BAUDCONbits.BRG16 = 0;
+    
+    // set up TX / RX pins
+    TRISC7 = 1;
+    TRISC6 = 1;
+    RCSTAbits.CREN = 1; // enable continuous reception
+    TXSTAbits.TXEN = 1;
+}
+
+void putch(char c) {
+    
+    while (!TXIF);
+    TXREG = c;
+}
+
+char getch(void) {
+    
+    while (!RCIF);
+    return RCREG;
+}
+
+char getche(void) {
+    char c = getch();
+    putch(c); // echo
+    
+    return c;
+}