X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Ffwbc.c;h=fecb7533ac3275da6700c2b5848b41de50b049ca;hb=404060c864c2d8bd444246078590c6f71f22217f;hp=6a8f187c55b80db709a2e8c1de7737e0ce3d6805;hpb=90fa4f3eca580f497dd24e9b3afd818d3b1f7054;p=my-code%2Farm.git

diff --git a/betty/fwbc.c b/betty/fwbc.c
index 6a8f187..fecb753 100644
--- 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;
 }