uart fixes - at least it's transmitting bullshitz by now!

[my-code/arm.git] / betty / fwbc.c

diff --git a/betty/fwbc.c b/betty/fwbc.c
index 6a8f187..fecb753 100644 (file)
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,23 +6,54 @@
  *
  */
 
-void uart0_init(void) {
+#include "lpc2xxx.h"
 
-       PINSEL0|=((1<<0)|(1<<2));       /* pin select: tx, rx */
+#define OSC_CLOCK              10000000
+#define BAUDRATE               9600
+#define P_DIV                  1
+#define P_CLOCK                        (OSC_CLOCK/P_DIV)
 
+typedef unsigned char u8;
+typedef unsigned int u32;
+
+void uart0_init(u32 br) {
+
+       /* pin select -> tx rx */
+       PINSEL0&=~((1<<0)|(1<<1)|(1<<2)|(1<<3));
+       PINSEL0|=((1<<0)|(1<<2));
+
+       /* divisor */
+       UART0_LCR|=(1<<7);
+       //UART0_DLL=((OSC_CLOCK/(16*br)))&0xff;
+       //UART0_DLM=(((OSC_CLOCK/(16*br)))&0xff00)>>8;
+       UART0_DLL=65;
+       UART0_DLM=0;
+
+       /* 8 bit data */
+       UART0_LCR=((1<<0)|(1<<1));
+
+       /* activate rx tx fifo */
+       UART0_FCR|=((1<<0)|(1<<1)|(1<<2));
 }
 
-void arm_init(void) {
+void uart_send(u8 byte) {
 
-       /* pin selection */
-       uart0_init();
+       /* wait for empty transmit buffer */
+       while(!(UART0_LSR&(1<<5)))
+               continue;
 
+       UART0_THR=byte;
 }
 
-void main(void) {
+int main(void) {
 
        /* initialization */
-       arm_init();
+       uart0_init(9600);
+
+       while(1) {
+               uart_send(0x23);
+       }
 
+       return 0;
 }