X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Fbetty.c;h=81b4687e2f18566f931a4e397e0a5b9ccddc3915;hb=def8902c1681a94ccb70d90cc855aedbc6a9e918;hp=f2ce2e5fba098487845e8c310c3252c7ca91b999;hpb=90fa4f3eca580f497dd24e9b3afd818d3b1f7054;p=my-code%2Farm.git

diff --git a/betty/betty.c b/betty/betty.c
index f2ce2e5..81b4687 100644
--- a/betty/betty.c
+++ b/betty/betty.c
@@ -5,9 +5,305 @@
  *
  */
 
+/*
+ * includes
+ */
+
+#include "lpc2xxx.h"
+
+/*
+ * defines
+ */
+
+/* bank 0/2 and boootloader addr/size */
+#define BANK0			0x80000000
+#define BANK1			0x81000000
+#define BANK2			0x82000000
+#define BANK_SIZE		0x00100000
+#define BOOTLOADER		0x7fffe000
+#define BL_SIZE			0x00002000
+
+/* flash cmd addresses - flash[0-18] <--> arm[1-19]*/
+#define B0F555	(*((volatile unsigned short *)(BANK0|0xaaa)))	// 0x555
+#define B0F2AA	(*((volatile unsigned short *)(BANK0|0x554)))	// 0x2aa
+#define B0F	(*((volatile unsigned short *)(BANK0)))
+#define B2F555	(*((volatile unsigned short *)(BANK2|0xaaa)))	// 0x555
+#define B2F2AA	(*((volatile unsigned short *)(BANK2|0x554)))	// 0x2aa
+#define B2F	(*((volatile unsigned short *)(BANK2)))
+
+/* lcd command and data addresses */
+#define LCD_CMD		(*((volatile unsigned char *)(BANK1)))
+#define LCD_DATA	(*((volatile unsigned char *)(BANK1+1)))
+
+/*
+ * type definitions
+ */
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+ /*
+  * functions
+  */
+
+void mmap_init(u8 memtype) {
+
+	MEMMAP=memtype;
+}
+
+void pll_init(void) {
+
+	/* configuration */
+	PLLCFG=0x42;	// multiplier = 3 (for cclk), dividor = 4 (for f_cco)
+	PLLCON=0x03;	// enable and set as clk source for the lpc
+	/* feed sequence */
+	PLLFEED=0xaa;
+	PLLFEED=0x55;
+	/* wait for lock */
+	while(!(PLLSTAT&(1<<10)))
+		continue;
+}
+
+void ext_mem_bank_init(void) {
+
+	BCFG0=0x10000420;       // flash 1
+	BCFG1=0x00000c42;       // lcd
+	BCFG2=0x10000420;       // flash 2
+}
+
+
+void pin_select_init() {
+
+	/*
+	 * a[19:2] -> address lines
+	 */
+
+	PINSEL2=0x0d6041d4;
+}
+
+void uart0_init(void) {
+
+	PINSEL0=0x05;			// pin select -> tx, rx
+	UART0_FCR=0x07;			// enable fifo
+	UART0_LCR=0x83;			// set dlab + word length
+	UART0_DLL=0x04;			// br: 38400 @ 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++];
+		/* flush if tx buffer maximum reached */
+		if(!(i%16))
+			while(!(UART0_LSR&(1<<6)))
+				continue;
+	}
+	
+	/* flush if \n and \r do not fit in the tx buffer */
+	if(i>14)
+		while(!(UART0_LSR&(1<<6)))
+			continue;
+
+	UART0_THR='\n';
+	UART0_THR='\r';
+
+	/* flush uart0 anyways */
+	while(!(UART0_LSR&(1<<6)))
+		continue;
+}
+
+void uart0_send_buf16(u16 *buf,int len) {
+
+	int i;
+
+	i=0;
+
+	for(i=0;i<len/2;i++) {
+		if(!(i%8))
+			while(!(UART0_LSR&(1<<6)))
+				continue;
+		UART0_THR=buf[i]&0xff;
+		UART0_THR=(buf[i]>>8)&0xff;
+	}
+}
+
+void uart0_send_buf32(u32 *buf,int len) {
+
+	int i;
+
+	i=0;
+
+	for(i=0;i<len/4;i++) {
+		if(!(i%4))
+			while(!(UART0_LSR&(1<<6)))
+				continue;
+		UART0_THR=buf[i]&0xff;
+		UART0_THR=(buf[i]>>8)&0xff;
+		UART0_THR=(buf[i]>>16)&0xff;
+		UART0_THR=(buf[i]>>24)&0xff;
+	}
+}
+
+void uart0_send_byte(u8 send) {
+
+	while(!(UART0_LSR&(1<<5)))
+		continue;
+
+	UART0_THR=send;
+}
+
+u8 uart0_get_byte(void) {
+
+	u8 rx;
+
+	while(!(UART0_LSR&(1<<0)))
+		continue;
+
+	rx=UART0_RBR;
+
+	return rx;
+}
+
+void pause(int cnt) {
+
+	while(cnt--)
+		asm volatile ("nop");
+}
+	
+void init_lcd(u8 s) {
+
+	LCD_CMD=0xe1;	// ?
+	LCD_CMD=0xe2;
+	pause(48000);
+	LCD_CMD=0xab;
+	LCD_CMD=0x27;
+	LCD_CMD=0x81;
+	LCD_CMD=0x3f;
+	LCD_CMD=0x65;
+	LCD_CMD=0x60;
+	LCD_CMD=0x1c;
+	LCD_CMD=0x61;
+	LCD_CMD=0x0a;
+	LCD_CMD=0x62;
+	LCD_CMD=0x75;
+	LCD_CMD=0x63;
+	LCD_CMD=0x81;
+	LCD_CMD=0x90;
+	LCD_CMD=0x88;
+	LCD_CMD=0x00;
+	LCD_CMD=0x89;
+	LCD_CMD=0x00;
+	LCD_CMD=0x8a;
+	LCD_CMD=0x33;
+	LCD_CMD=0x8b;
+	LCD_CMD=0x33;
+	LCD_CMD=0x8c;
+	LCD_CMD=0x66;
+	LCD_CMD=0x8d;
+	LCD_CMD=0x66;
+	LCD_CMD=0x8e;
+	LCD_CMD=0x99;
+	LCD_CMD=0x8f;
+	LCD_CMD=0x99;
+	if(s) {
+		LCD_CMD=0xa1;
+		LCD_CMD=0xc0;
+	}
+	else {
+		LCD_CMD=0xa0;
+		LCD_CMD=0xc8;
+	}
+	LCD_CMD=0x2e;
+	pause(48000);
+	LCD_CMD=0x2f;
+	LCD_CMD=0xa4;
+	LCD_CMD=0xa6;
+}
+
+/*
+ * spi0 stuff (+ cc1100)
+ */
+
+#define SLAVE	0
+#define MASTER	1
+
+void spi1_init(u8 width,u8 type,u8 div) {
+
+	if((width<8)|(width>16))
+		width=8;
+	if(width==16)
+		width=0;
+
+	div&=0xfe;
+	if(div<8)
+		div=8;
+
+	S1SPCR=(1<<2)|(width<<8)|(type<<5);
+	S1SPCCR=div;
+}
+
+#define cc1100_init	spi1_init(8,MASTER,8)
+
+void spi1_send(u16 data) {
+
+	S1SPDR=data;
+
+	while(!(S1SPSR&(1<<7)))
+		continue;
+}
+
+void bl_init(void) {
+
+	IODIR0|=(1<<4);
+}
+
+void bl_toggle(void) {
+
+	if(IOPIN0&(1<<4))
+		IOCLR0=(1<<4);
+	else
+		IOSET0=(1<<4);
+}
+
+void bl_on(void) {
+
+	IOCLR0=(1<<4);
+}
+
+void bl_off(void) {
+
+	IOSET0=(1<<4);
+}
+
+/*
+ * main function
+ */
+
 int main() {
 
+	char buf[]="betty - live from the flash at 0x80000000! ;)\r\n";
+
+	pll_init();
+	uart0_init();
+	ext_mem_bank_init();
+	pin_select_init();
+	init_lcd(0);
+	bl_init();
+
+	pause(0xffffff);
 
+	while(1) {
+		uart0_send_string(buf);
+		bl_toggle();
+		pause(0x9ffff);
+	}
 
 	return 0;
 }