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手里有两块m8的usbasp板 支持5 3.3供电 最早逆向lgt isp协议就是想弄到这个上. 看坛里不少朋友v-usb有兼容问题所以先做了串口版本
实际测试和优化后应该是没有硬件串口的速度快
看到坛里有说linux下无法开发lgt的所以发一下吧
支持avrdude, progisp172
progisp172 选择m8芯片 读识别符也是m8的
avrdude 可以再avrdude.conf中加入一个芯片看着也许舒服点
#------------------------------------------------------------
# LGT8F0*A
#------------------------------------------------------------
part
id = "lgt8f08a";
desc = "LGT8F08A";
stk500_devcode = 0x70;
avr910_devcode = 0x76;
signature = 0x1e 0x93 0x07;
pagel = 0xd7;
bs2 = 0xc2;
chip_erase_delay = 10000;
pgm_enable = "1 0 1 0 1 1 0 0 0 1 0 1 0 0 1 1",
"x x x x x x x x x x x x x x x x";
chip_erase = "1 0 1 0 1 1 0 0 1 0 0 x x x x x",
"x x x x x x x x x x x x x x x x";
timeout = 200;
stabdelay = 100;
cmdexedelay = 25;
synchloops = 32;
bytedelay = 0;
pollindex = 3;
pollvalue = 0x53;
predelay = 1;
postdelay = 1;
pollmethod = 0;
pp_controlstack =
0x0E, 0x1E, 0x0F, 0x1F, 0x2E, 0x3E, 0x2F, 0x3F,
0x4E, 0x5E, 0x4F, 0x5F, 0x6E, 0x7E, 0x6F, 0x7F,
0x66, 0x76, 0x67, 0x77, 0x6A, 0x7A, 0x6B, 0x7B,
0xBE, 0xFD, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00;
hventerstabdelay = 100;
progmodedelay = 0;
latchcycles = 5;
togglevtg = 1;
poweroffdelay = 15;
resetdelayms = 2;
resetdelayus = 0;
hvleavestabdelay = 15;
resetdelay = 15;
chiperasepulsewidth = 0;
chiperasepolltimeout = 10;
programfusepulsewidth = 0;
programfusepolltimeout = 5;
programlockpulsewidth = 0;
programlockpolltimeout = 5;
memory "eeprom"
size = 504;
page_size = 4;
min_write_delay = 9000;
max_write_delay = 9000;
readback_p1 = 0xff;
readback_p2 = 0xff;
read = " 1 0 1 0 0 0 0 0",
" 0 0 x x x x x a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";
write = " 1 1 0 0 0 0 0 0",
" 0 0 x x x x x a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" i i i i i i i i";
mode = 0x04;
delay = 20;
blocksize = 128;
readsize = 256;
;
memory "flash"
paged = yes;
size = 8192;
page_size = 64;
num_pages = 128;
min_write_delay = 4500;
max_write_delay = 4500;
readback_p1 = 0xff;
readback_p2 = 0x00;
read_lo = " 0 0 1 0 0 0 0 0",
" 0 0 0 0 a11 a10 a9 a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";
read_hi = " 0 0 1 0 1 0 0 0",
" 0 0 0 0 a11 a10 a9 a8",
" a7 a6 a5 a4 a3 a2 a1 a0",
" o o o o o o o o";
loadpage_lo = " 0 1 0 0 0 0 0 0",
" 0 0 0 0 x x x x",
" x x x a4 a3 a2 a1 a0",
" i i i i i i i i";
loadpage_hi = " 0 1 0 0 1 0 0 0",
" 0 0 0 0 x x x x",
" x x x a4 a3 a2 a1 a0",
" i i i i i i i i";
writepage = " 0 1 0 0 1 1 0 0",
" 0 0 0 0 a11 a10 a9 a8",
" a7 a6 a5 x x x x x",
" x x x x x x x x";
mode = 0x21;
delay = 10;
blocksize = 64;
readsize = 256;
;
memory "lfuse"
size = 1;
min_write_delay = 2000;
max_write_delay = 2000;
read = "0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0",
"x x x x x x x x o o o o o o o o";
write = "1 0 1 0 1 1 0 0 1 0 1 0 0 0 0 0",
"x x x x x x x x i i i i i i i i";
;
memory "hfuse"
size = 1;
min_write_delay = 2000;
max_write_delay = 2000;
read = "0 1 0 1 1 0 0 0 0 0 0 0 1 0 0 0",
"x x x x x x x x o o o o o o o o";
write = "1 0 1 0 1 1 0 0 1 0 1 0 1 0 0 0",
"x x x x x x x x i i i i i i i i";
;
memory "lock"
size = 1;
min_write_delay = 2000;
max_write_delay = 2000;
read = "0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0",
"x x x x x x x x x x o o o o o o";
write = "1 0 1 0 1 1 0 0 1 1 1 x x x x x",
"x x x x x x x x 1 1 i i i i i i";
;
memory "calibration"
size = 4;
read = "0 0 1 1 1 0 0 0 0 0 x x x x x x",
"0 0 0 0 0 0 a1 a0 o o o o o o o o";
;
memory "signature"
size = 3;
read = "0 0 1 1 0 0 0 0 x x x x x x x x",
"x x x x x x a1 a0 o o o o o o o o";
;
;
问过官方 isp协议有没有读取芯片标示的命令, 没有回应, 只能用m8代替
lgt的isp速度可能是 1600000bps 左右 再高就不能进入编程模式了
理论最高读取速度约20000Byte/S
理论最高写速度约13333Byte/S
以上都是猜的.
progisp172 的usb包是128字节
avrdude 的usb包是200字节
progisp172 也许更快点
我手里usbasp的电路图 别人的东西我买的现成的 谢谢这位哥们卖的相当便宜
基于上面硬件的固件
usbasp的官方电路图 我看io定义是一样的 没测试过
目前发布了基于51内核的串口isp, 基于lgt芯片的串口isp, 基于m8 usbasp硬件的v-usb接口isp
啥时候给个精华
avrdude 读写eeprom
avrdude -p lgt8f08a -c usbasp -U eeprom:r:"R:/eeprom.bin":r
avrdude -p lgt8f08a -c usbasp -U eeprom:w:"R:/eeprom1.bin":r
avrdude 读写flash
avrdude -p lgt8f08a -c usbasp -u -U flash:r:"R:/flash.bin":r
avrdude -p lgt8f08a -c usbasp -U flash:w:"R:/test_firmware.hex":i
加密位
LB1 LB2 同时置位为芯片加密
熔丝
SPIEN置位为熔丝使能
熔丝低位0:5是rc校准
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