From 2cdab277c293b22742ebf7888ca8ac40555f4f1d Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@staubsauger.localdomain>
Date: Sun, 5 Aug 2007 17:23:58 +0200
Subject: [PATCH] added initial testing fwbc code

---
 betty/Makefile | 16 +++++++++++++++-
 betty/fwbc.c   | 40 +++++++++++++++++++++++++++++++++-------
 2 files changed, 48 insertions(+), 8 deletions(-)

diff --git a/betty/Makefile b/betty/Makefile
index 3bff9d0..6975542 100644
--- a/betty/Makefile
+++ b/betty/Makefile
@@ -1,5 +1,19 @@
 CC = gcc
 CFLAGS = -Wall
 
-all: lpcload
+ARMCC = /scratch/arm-elf/bin/arm-elf-gcc
+ARMCFLAGS = -Wall -mcpu=arm7tdmi 
 
+ARMOBJCOPY = /scratch/arm-elf/bin/arm-elf-objcopy
+
+all: lpcload fwbc.hex
+
+# fwbc
+fwbc:
+	$(ARMCC) $(ARMCFLAGS) -c fwbc.c -o fwbc
+
+fwbc.hex: fwbc
+	$(ARMOBJCOPY) -O ihex fwbc fwbc.hex
+
+clean:
+	rm -f lpcload fwbc.hex fwbc
diff --git a/betty/fwbc.c b/betty/fwbc.c
index 6a8f187..46a342c 100644
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,23 +6,49 @@
  *
  */
 
-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;
+
+void uart0_init(int br) {
+
+	PINSEL0&=~((0x03<<0)|(0x03<<2)); 	// clear bits 0-3
+	PINSEL0|=((1<<0)|(1<<2));		// pin select: tx, rx
+
+	UART0_LCR|=(1<<7);			// enable access to divisor
+	UART0_DLL=(P_CLOCK/(br*16))&0xff;	// set divisor
+	UART0_DLL=((P_CLOCK/(br*16))&0xff00)>>8;
+	UART0_LCR&=~(1<<7);			// disable access to divisor
+
+	UART0_LCR&=~(0x03<<2);			// 1 stop bit, no parity
+	UART0_LCR|=0x03;			// 8 data bits
+
+	UART0_FCR=0x01;				// activate fifo
 }
 
-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;
 }
 
-- 
2.39.2