X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Ffwbc.c;h=a625716b4123a9b4c6d3f0d4108663a29b87c888;hb=b6437bf5a7811ee84717854f95c515a137eb5b74;hp=6a8f187c55b80db709a2e8c1de7737e0ce3d6805;hpb=90fa4f3eca580f497dd24e9b3afd818d3b1f7054;p=my-code%2Farm.git

diff --git a/betty/fwbc.c b/betty/fwbc.c
index 6a8f187..a625716 100644
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,23 +6,75 @@
  *
  */
 
+#include "lpc2xxx.h"
+
+#define OSC_CLOCK		10000000
+#define BAUDRATE		9600
+#define P_DIV			4
+#define P_CLOCK			(OSC_CLOCK/P_DIV)
+
+typedef unsigned char u8;
+typedef unsigned int u32;
+
+
+/* memory mapping */
+
+#define	MMAP_BL		0x00
+#define MMAP_RAM	0x02
+#define MMAP_EXT	0x03
+
+void mmap_init(u8 memtype) {
+
+	MEMMAP=memtype;
+}
+
 void uart0_init(void) {
 
-	PINSEL0|=((1<<0)|(1<<2));	/* pin select: tx, rx */
+	/* pin select -> tx rx */
+	PINSEL0=0x05;
+
+	/* enable fifo */
+	UART0_FCR=0x07;
 
+	/* set dlab + word length */
+	UART0_LCR=0x83;
+
+	/* set baud rate to 9600 @ 10/4 mhz */
+	UART0_DLL=0x10;
+	UART0_DLM=0x00;
+
+	/* unset dlab */
+	UART0_LCR=0x03;
 }
 
-void arm_init(void) {
+void uart_send(char *txbuf) {
 
-	/* pin selection */
-	uart0_init();
+	int i;
+
+	i=0;
+
+	while(txbuf[i])
+		UART0_THR=txbuf[i++];
+	UART0_THR='\n';
+	UART0_THR='\r';
 
+	while(!(UART0_LSR&(1<<6))) {}
 }
 
-void main(void) {
+int main(void) {
+
+	char txbuf[]="uart0 working";
+
+	/* memory mapping of interrupt vectors to static ram */
+	mmap_init(MMAP_RAM);
 
 	/* initialization */
-	arm_init();
+	uart0_init();
+
+	while(1) {
+		uart_send(txbuf);
+	}
 
+	return 0;
 }