From: hackbard <hackbard@staubsauger.localdomain>
Date: Sat, 1 Sep 2007 20:31:22 +0000 (+0200)
Subject: betty.c - first test fw to writo to flash bank0
X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2cbc6d2f18a38237fcd1df2ef67ba315af080f03;p=my-code%2Farm.git

betty.c - first test fw to writo to flash bank0
---

diff --git a/betty/Makefile b/betty/Makefile
index dfd3fee..0af33ac 100644
--- a/betty/Makefile
+++ b/betty/Makefile
@@ -16,7 +16,7 @@ CROSS_ROM_LDFLAGS = -Tlpc2220_rom.ld -nostartfiles -nostdlib
 
 # build objects
 HOST_TARGET = lpcload fwdump
-CROSS_TARGET = fwbc.hex fwflash.hex fwflash.elf # debug: .elf for objdump
+CROSS_TARGET = fwbc.hex fwflash.hex betty.hex
 
 # all projects
 all: $(HOST_TARGET) $(CROSS_TARGET)
@@ -36,6 +36,10 @@ arm: arm_clean $(CROSS_TARGET)
 %.elf: %.o startup.o
 	$(CROSS_LD) $(CROSS_RAM_LDFLAGS) startup.o -o $@ $<
 
+# special linker case ...
+betty.elf: betty.o startup.o
+	$(CROSS_LD) $(CROSS_ROM_LDFLAGS) startup.o -o $@ $<
+
 # .hex out of .elf
 %.hex: %.elf
 	$(CROSS_OBJCOPY) -O ihex $< $@
diff --git a/betty/betty.c b/betty/betty.c
index f2ce2e5..68c86f7 100644
--- a/betty/betty.c
+++ b/betty/betty.c
@@ -5,9 +5,182 @@
  *
  */
 
+/*
+ * includes
+ */
+
+#include "lpc2xxx.h"
+
+/*
+ * defines
+ */
+
+/* bank 0/2 and boootloader addr/size */
+#define BANK0			0x80000000
+#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)))
+
+/*
+ * 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;
+}
+
+/*
+ * 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();
 
+	while(1)
+		uart0_send_string(buf);
 
 	return 0;
 }
diff --git a/betty/lpc2220_rom.ld b/betty/lpc2220_rom.ld
index 11fa38d..1109baa 100644
--- a/betty/lpc2220_rom.ld
+++ b/betty/lpc2220_rom.ld
@@ -8,9 +8,9 @@
 /* memory definitions */
 
 MEMORY {
-	FLASH_BANK0 (rx) : ORIGIN=0x80000000, LENGTH=0x00100000
-	FLASH_BANK2 (rx) : ORIGIN=0x82000000, LENGTH=0x00100000
-	RAM (rw) : ORIGIN=0x40000000, LENGTH=0x00010000
+	FLASH_BANK0 (rx) : ORIGIN = 0x80000000, LENGTH = 0x00100000
+	FLASH_BANK2 (rx) : ORIGIN = 0x82000000, LENGTH = 0x00100000
+	RAM (rw) : ORIGIN = 0x40000000, LENGTH = 0x00010000
 }
 
 /* section definitions */
@@ -19,18 +19,18 @@ SECTIONS {
 	
 	/* startup and user code (.text) */
 	.text : {
-		startup.o(.text)	// startup code
-		*(.text)		// our code
-		*(.glue_7)		// glue code
-		*(.glue_7t)		// glue code
+		startup.o(.text)
+		*(.text)
+		*(.glue_7)
+		*(.glue_7t)
 	} > FLASH_BANK0
 
-	. = ALIGN(4)
+	. = ALIGN(4);
 
 	/* read only data */
-	.rodata : { *(.rodata) } > FLASH_BANK0
+	.rodata : { *(.rodata*) } > FLASH_BANK0
 
-	. = ALIGN(4)
+	. = ALIGN(4);
 
 	/* initialized data */
 	.data : { *(.data) } > RAM