From 2cbc6d2f18a38237fcd1df2ef67ba315af080f03 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@staubsauger.localdomain>
Date: Sat, 1 Sep 2007 22:31:22 +0200
Subject: [PATCH] betty.c - first test fw to writo to flash bank0
---
betty/Makefile | 6 +-
betty/betty.c | 173 +++++++++++++++++++++++++++++++++++++++++++
betty/lpc2220_rom.ld | 20 ++---
3 files changed, 188 insertions(+), 11 deletions(-)
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
--
2.39.5