尝试使用另一个PIC，LVP Mode实现PIC16程序设计

嗨。我正在尝试为PIC16实现一个程序员。我正在开发的目标PIC是PIC12F1822（它与PIC16F1823具有相同的编程规范），我读了编程规范，我想我理解它，但是我不能得到目标PIC来响应。我也附上了。一个范围来查看在连接期间输出的皮卡3是什么，并且我复制了波形，但是PIC12没有回答。我没有敲击，我的“程序员”是一个具有可变长度SPI的PIC。硬件连接：VDD到VDD VSS到VSS GPIO，输出到目标MCLR SCK到PGC MOSI/M。ISO到PGDI将4K7电阻器作为PGC/PGDI AM上的拉低，知道“LSB第一”格式。程序流：-MCLR低发送镜像“MCHP”& gt；00001010 00010010×11000010 10110010（镜像是LSB第一）等待一位-发送CMD 0（负载CONF内存），一个6位传输-发送0x3FFF（实际上）0x7FFE），一个16位传输-发送CMD 6（增量地址）六次，现在地址指针为0x800 6（设备ID）-发送CMD 4（读取程序存储器）-禁用SDO，tiS位设置为1 -发送16时钟以获得设备ID，但我没有得到任何东西，目标PIC不输出任何东西。SPI设置：500千赫时钟，波形看起来很不错。在上升沿设置新的比特，目标应该在下降沿上获取。目标PIC具有LVP。重复，波形和序列与皮卡3相同，所以我不确定我做错了什么，硬件或软件。如果有人可以给出提示。
                    
                    
               
                                                                                      以下为原文

                                                                            Hi.
I'm trying to implement a programmer for PIC16.
The target PIC i'm using for development is a PIC12F1822 (which has the same programming specification as the PIC16F1823)

I read the programming specification and i think i understood it, however i can't get the target PIC to respond.
I also attached a scope to see what a PICKIT 3 was outputting during connection and i have replicated the waveform, but the PIC12 doesn't answer.

I am not bit-banging, my "programmer" is a PIC that has variable lenght SPI.
The hardware connection:
  VDD to VDD
  VSS to VSS
  GPIO as output to Target MCLR
  SCK to PGC
  MOSI/MISO to PGD
I put 4k7 resistors as pull-downs on PGC/PGD

I am aware of the "LSB First" format.

The program flow:
- MCLR LOW
- send mirrored "MCHP" -> 00001010 00010010 11000010 10110010 (mirrored because it's LSB first)
wait a bit
- send CMD 0 (Load Conf Memory), a 6bit transfert
- send 0x3FFF (actually 0x7FFE), a 16 bit transfert
- send CMD 6 (Increment Address) six times, now address pointer is 0x8006 (device ID)
- send CMD 4 (Read Program Memory)
- disable SDO, TRIS bit set to 1
- send 16 clocks to get the device ID

but i'm not getting anything, the target pic is not outputting anything.

SPI setup: 500kHz clock, waveform looks very good. new bit set on rising edge, target should be acquiring on falling edge.
The target PIC has LVP on.
I repeat, the waveform and the sequence is the same as in the PICKIT 3 so i'm not sure what i'm doing wrong, hardware or software.

If anyone can give a hint..