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

diff --git a/betty/Makefile b/betty/Makefile
index dfd3fee..0af33ac 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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