X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=betty%2Ffwbc.c;h=9682ee8292fb4396fb98f16f29aaf2560844e0a6;hb=ba94d4dc80e71b41a6458e028dd45673782bc5f5;hp=46a342c8ab3e6e3101a8b00f70c1d0d6215b6973;hpb=2cdab277c293b22742ebf7888ca8ac40555f4f1d;p=my-code%2Farm.git

diff --git a/betty/fwbc.c b/betty/fwbc.c
index 46a342c..9682ee8 100644
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,49 +6,115 @@
  *
  */
 
+/*
+ * include files
+ */
+
 #include "lpc2xxx.h"
 
+/*
+ * defines
+ */
+
+/* misc */
 #define OSC_CLOCK		10000000
 #define BAUDRATE		9600
-#define P_DIV			1
+#define P_DIV			4
 #define P_CLOCK			(OSC_CLOCK/P_DIV)
 
-typedef unsigned char u8;
+/* memory mapping */
+#define	MMAP_BL			0x00
+#define MMAP_RAM		0x02
+#define MMAP_EXT		0x03
 
-void uart0_init(int br) {
+/*
+ * type definitions
+ */
 
-	PINSEL0&=~((0x03<<0)|(0x03<<2)); 	// clear bits 0-3
-	PINSEL0|=((1<<0)|(1<<2));		// pin select: tx, rx
+typedef unsigned char u8;
+typedef unsigned int u32;
 
-	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
+/*
+ * function prototypes
+ */
 
-	UART0_LCR&=~(0x03<<2);			// 1 stop bit, no parity
-	UART0_LCR|=0x03;			// 8 data bits
+void mmap_init(u8 memtype);
+void uart0_init(void);
+void uart0_send_string(char *txbuf);
+void uart0_send_char(char send);
 
-	UART0_FCR=0x01;				// activate fifo
-}
+/*
+ * main function
+ */
+
+int main(void) {
 
-void uart_send(u8 byte) {
+	/* memory mapping of interrupt vectors to static ram */
 
-	/* wait for empty transmit buffer */
-	while(!(UART0_LSR&(1<<5)))
-		continue;
+	//mmap_init(MMAP_RAM);
 
-	UART0_THR=byte;
-}
+	/* uart initialization */
 
-int main(void) {
+#ifdef USE_FUNCTIONS
+	//uart0_init();
+#else
+	PINSEL0=0x05;			// pin select -> tx, rx
+	UART0_FCR=0x07;			// enable fifo
+	UART0_LCR=0x83;			// set dlab + word length
+	UART0_DLL=0x10;			// br: 9600 @ 10/4 mhz
+	UART0_DLM=0x00;
+	UART0_LCR=0x03;			// unset dlab
+#endif
 
-	/* initialization */
-	uart0_init(9600);
+	/* external memory init */
 
 	while(1) {
-		uart_send(0x23);
+		while(!(UART0_LSR&(1<<5)))
+			continue;
+		UART0_THR=0x23;
 	}
 
 	return 0;
 }
 
+/*
+ * functions
+ */
+
+void mmap_init(u8 memtype) {
+
+	MEMMAP=memtype;
+}
+
+void uart0_init(void) {
+
+	PINSEL0=0x05;			// pin select -> tx, rx
+	UART0_FCR=0x07;			// enable fifo
+	UART0_LCR=0x83;			// set dlab + word length
+	UART0_DLL=0x10;			// br: 9600 @ 10/4 mhz
+	UART0_DLM=0x00;
+	UART0_LCR=0x03;			// unset dlab
+}
+
+void uart0_send_string(char *txbuf) {
+
+	int i;
+
+	i=0;
+
+	while(txbuf[i])
+		UART0_THR=txbuf[i++];
+	UART0_THR='\n';
+	UART0_THR='\r';
+
+	while(!(UART0_LSR&(1<<6))) {}
+}
+
+void uart0_send_char(char send) {
+
+	while(!(UART0_LSR&(1<<5)))
+		continue;
+
+	UART0_THR=send;
+}
+