X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Farm.git;a=blobdiff_plain;f=betty%2Ffwbc.c;h=187481916da4c8c127c5730dd7a883f08b319b18;hp=fecb7533ac3275da6700c2b5848b41de50b049ca;hb=HEAD;hpb=404060c864c2d8bd444246078590c6f71f22217f

diff --git a/betty/fwbc.c b/betty/fwbc.c
index fecb753..1874819 100644
--- a/betty/fwbc.c
+++ b/betty/fwbc.c
@@ -6,54 +6,181 @@
  *
  */
 
+/*
+ * 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)
 
+/* memory mapping */
+#define	MMAP_BL			0x00
+#define MMAP_RAM		0x02
+#define MMAP_EXT		0x03
+
+/* band 0/2 & bootloader addr */
+#define BANK0			0x80000000
+#define BANK2			0x82000000
+#define BOOTLOADER		0x7fffe000
+
+/*
+ * type definitions
+ */
+
 typedef unsigned char u8;
+typedef unsigned short u16;
 typedef unsigned int u32;
 
-void uart0_init(u32 br) {
+/*
+ * function prototypes
+ */
+
+void mmap_init(u8 memtype);
+void uart0_init(void);
+void uart0_send_string(char *txbuf);
+void uart0_send_char(char send);
 
-	/* pin select -> tx rx */
-	PINSEL0&=~((1<<0)|(1<<1)|(1<<2)|(1<<3));
-	PINSEL0|=((1<<0)|(1<<2));
+/*
+ * main function
+ */
 
-	/* 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;
+int main(void) {
 
-	/* 8 bit data */
-	UART0_LCR=((1<<0)|(1<<1));
+	/* variables */
 
-	/* activate rx tx fifo */
-	UART0_FCR|=((1<<0)|(1<<1)|(1<<2));
-}
+	u16 *mem=0;
+	u32 *bl=0;
+	u32 i,len;
+	u8 start;
 
-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) {
+	//uart0_init();
+
+	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
 
-	/* initialization */
-	uart0_init(9600);
+	/* external memory init */
+
+	BCFG0=0x1000FBEF;		// no boot[1:0] influence? (thnx colibri)
+					// BCFG2 should be fine as is
+
+	while(1) {
 
+	/* wait for fwdump to send transmit start character */
+	start=0x23;
 	while(1) {
-		uart_send(0x23);
+		while(!(UART0_LSR&(1<<0)))
+			continue;
+		start=UART0_RBR;
+		if(start=='0') {
+			mem=(u16 *)BANK0;
+			len=0x80000;
+			break;
+		}
+		if(start=='2') {
+			mem=(u16 *)BANK2;
+			len=0x80000;
+			break;
+		}
+		if(start=='b') {
+			BCFG0=0x1000FBEF;	// 32 bit width
+			bl=(u32 *)BOOTLOADER;
+			len=0x800;
+			break;
+		}
+	}
+
+	/* transmit 1 mb of data */
+	for(i=0;i<len;i++) {			// care for endianness
+
+		while(!(UART0_LSR&(1<<5)))
+			continue;
+		if(start=='b')
+			UART0_THR=(*bl&0xff);
+		else
+			UART0_THR=(*mem&0xff);
+
+		while(!(UART0_LSR&(1<<5)))
+			continue;
+		if(start=='b')
+			UART0_THR=((*bl&0xff00)>>8);
+		else {
+			UART0_THR=((*mem&0xff00)>>8);
+			mem++;
+		}
+
+		if(start=='b') {
+			while(!(UART0_LSR&(1<<5)))
+				continue;
+			UART0_THR=((*bl&0xff0000)>>16);
+			while(!(UART0_LSR&(1<<5)))
+				continue;
+			UART0_THR=((*bl&0xff000000)>>24);
+			bl++;
+		}
+	}
+
 	}
 
 	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;
+}
+