各位好，请教一下啊，我想直接用数组写或者不用Xmodem协议直接用串口flash做bootloader,
各位好，请教一下啊，我想直接用数组写flash做bootloader, 为什么数组写进去后位置在边上呢？写地址的代码是参照马潮老师的，只是想将程序编译后的二进制文件作为一个数组在程序中直接写入，不用串口了
用Xmodem协议发送的也是一样的二进制文件呀，用串口看每个写入的元素也一样的
是不是程序运行的时候，flash被锁死保护了？
主要代码如下：
//data1有256个元素，正好是一页，只是二进制文件的第一个数组
char data1[]={"0C9446000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D000C945D00"};
long address = 0;
void boot_page_ew(long p_address,char code)
{
/*
SPMCSR:
Bit 7 ¨C SPMIE: SPM Interrupt Enable
Bit 6 ¨C RWWSB: Read-While-Write Section Busy
Bit 5 ¨C Res: Reserved Bit
Bit 4 ¨C RWWSRE: Read-While-Write Section Read Enable
Bit 3 ¨C BLBSET: Boot Lock Bit Set
Bit 2 ¨C PGWRT: Page Write
Bit 1 ¨C PGERS: Page Erase
Bit 0 ¨C SPMEN: Store Program Memory Enable
RAMPZ:
Bits 7..1 ¨C Res: Reserved Bits
Bit 0 ¨C RAMPZ0: Extended RAM Page Z-pointer
RAMPZ0 = 0: Program memory address $0000 - $7FFF (lower 64K bytes) is
accessed by ELPM/SPM
RAMPZ0 = 1: Program memory address $8000 - $FFFF (higher 64K bytes) is
accessed by ELPM/SPM
*/
asm("mov r30,r16\n"
"mov r31,r17\n"
"out 0x3b,r18\n");
SPMCSR = code;
asm("spm\n");
}
void boot_page_fill(unsigned int address,int data)
{
asm("mov r30,r16\n"
"mov r31,r17\n"
"mov r0,r18\n"
"mov r1,r19\n");
SPMCSR = 0x01;
asm("spm\n");
}
void wait_page_rw_ok(void)
{
while(SPMCSR & 0x40)
{
while(SPMCSR & 0x01);
SPMCSR = 0x11;
asm("spm\n");
}
}
void write_one_page(void)
{
int i;
boot_page_ew(address,0x03);
wait_page_rw_ok();
for(i=0;i<SPM_PAGESIZE;i+=2)
{
boot_page_fill(i, data+(data<<8));
}
boot_page_ew(address,0x05);
wait_page_rw_ok();
}
main
{
int i = 0;
unsigned char timercount = 0;
unsigned char packNO = 1;
int bufferPoint = 0;
for(i=0;i<256;i++)
{
data=data1;
bufferPoint++;
}
while(bufferPoint >= SPM_PAGESIZE)
{
write_one_page();
address += SPM_PAGESIZE;
bufferPoint = 0;
}
}
写入的效果如下：
00000000:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000001:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000002:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000003:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000004:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000005:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000006:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
00000007:30 43 39 34 34 36 30 30-30 43 39 34 35 44 30 300C9446000C945D00
……
我看马超老师的程序，二进制文件写入之后都是在中间区域的，我这怎么到边上去了？而且中间显示的是对应的ASCII码~~~请大家不吝指教 回复【楼主位】poipoi09876
-----------------------------------------------------------------------
今天不用Xmodem协议，直接用串口发送这个数组，写入的情况也是一样~~~麻烦大家指教！ 另外，在GCC的环境下，采用库里的标准函数：
#include <inttypes.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
void boot_program_page (uint32_t page, uint8_t *buf)
{
uint16_t i;
uint8_t sreg;
// Disable interrupts.
sreg = SREG;
cli();
eeprom_busy_wait ();
boot_page_erase (page);
boot_spm_busy_wait (); // Wait until the memory is erased.
for (i=0; i<SPM_PAGESIZE; i+=2)
{
// Set up little-endian word.
uint16_t w = *buf++;
w += (*buf++) << 8;
boot_page_fill (page + i, w);
}
boot_page_write (page); // Store buffer in flash page.
boot_spm_busy_wait(); // Wait until the memory is written.
// Reenable RWW-section again. We need this if we want to jump back
// to the application after bootloading.
boot_rww_enable ();
// Re-enable interrupts (if they were ever enabled).
SREG = sreg;
}
情况也基本一样，都是写在边上，难道不用Xmodem协议就一定不行么？我这用Xmodem是可以的
马潮老师若有时间也请看看吧，感激不尽。
我就是想不用Xmodem协议做一个串口直接发送二进制代码（作为数组从主机到从机发送）做bootloader，这样可行吗？我使用的是Mega128 不好意思啊，献丑了，实际上是这样的：这些都是两个一起的十六进制数，先把他们转化成十进制的，然后再放在数组里面写入就可以啦，O(∩_∩)O哈哈~，打扰大家啦不好意思啦 这个思路不错
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