怎么通过另一个处理器加载

我想这可能奏效，虽然我从来没有尝试过。也许你在时间上有点错误，或者类似？



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    I suppose this might work, though I've never tried it.
Maybe you have some mistake in timing or alike?

扔掉PIC18s，用一个PIC24替换它们。时期。



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    Throw away both PIC18s and replace them with a single PIC24. Period.

我不能使用单处理器！我需要在2个移动部件之间交换数据。



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    I cannot use single processor!
I need to exchange data between 2 moving parts.
 

那又怎么样？用“移动部件”数据给这个处理器做任何你想做的事情。



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    So what? Feed this single processor with both "moving parts" data and do whatever you want.

引导加载程序用一个0x55的AutoBod字符对每个命令进行序言。这是否被UART桥消耗，或者它也被传递到第二MCU？你在用哪一个MCUs？



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    The bootloader prefaces each command with an 0x55 autobaud character.  Does this get consumed by the UART bridge or is it also passed to the 2nd MCU?
 
Which MCUs are you using?  

当更新第二处理器上的固件时，它将擦除UART控制寄存器，配置位也被擦除。因此，如果你正在擦除当前正在执行的同一闪存区域，那么时钟HOTRES、RESET、IVT都不起作用。此外，按照逻辑，编程会慢得多，因为数据从控制器流向其他UART。在UART2USB的相同引脚上，中间非易失性软件可选择开关（可能是内存MUX）。-在更新任何控制器的程序之前，使用控制信号改变开关位置，以使数据流向所需控制器。



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    When You are updating the firmware on second processor, it will erase the UART control register, Config bits are also erased . Hence clock haults, reset, IVT nothing work If you are erasing the same flash area which is executing right now.
And also as per your logic, the programming will be quite slower since data is flowing from on controller to other that too using UART.
I will suggest you a simple steps:
- Connect both UART on same pins of UART2USB with intermediate non volatile software selectable switch (May be Mux with memory).
- Before updating program of any controller, change the switch position using control signal, to let data flow to desired controller.

你好，丹诺！谢谢你的回答！我把所有的东西传递给第二个CPU。我禁用了第一个CPU上的所有中断，只检查了UARTs上的相应的RCIF标记来接收和发送数据。



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    Hello, Danno!
Thank you for your answer!
I am passing everything to the second CPU.
I disabled all interrupts on the first CPU and only check the corresponding RCIF flags on both UARTs to receive and send data.
I use PIC18F26K40 microcontroller.
 
 

你好，Ravic！如果UART桥不能正常工作，我会放一些开关。唯一的问题是我必须重新设计电路板。：）



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    Hello, Ravic!
If UART bridge doesn't work finally I will put some switch.
The only trouble is that I have to redesign the board. :)
 

嗨，外部开关绝对是最简单的路线。



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    Hi,
External switch is definitely the easiest route.
Regards
 

我会尝试复制从UART1到TX的UART2和RX从UART2到TX的UART1。我将禁用UART1和UART2，并与GPIO的唯一。我可以跟踪输入的变化与中断的变化和修改相应的输出。也许这将工作…



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    I will try to copy RX from UART1 to TX of UART2 and RX from UART2 to TX of UART1.
I will disable UART1 and UART2 and work with GPIO's only.
I can track input changes with interrupt on change and modify corresponding output.
Maybe this will work...

嗨，我认为你的方法从时间角度来看是不可靠的…你使用哪一个PIC18？一些最新的PIC18具有PPS和CLC，并将它们组合起来，可以在CPU内“路由”RX1到TX2和TX1到RX2。我从来没有尝试过，但它可能是一个解决方案，假设您的PIC18具有PPS和CLC外围设备。



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    Hi,
I think your method is not going to be reliable from timing point of view....
Which PIC18 do you use ?
Some of the newest PIC18 have PPS and CLC and combining them,  it is maybe possible to "route" RX1 TO TX2 and TX1 to RX2 inside the CPU. I never tried this but it might be a solution assuming your PIC18 has PPS & CLC peripherals
Regards
 

嗨，RISC！谢谢你的回答！我使用PIC18F26K40！它有PPS但它没有CLC。我认为只用PPS不可能将RX1路由到TX2和RX2到TX1。！



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    Hi, RISC!
Thank you for your answer!
I use PIC18F26K40!
It has PPS but it doesn't have CLC.
I think using only PPS it is not possible to route RX1 to TX2 and RX2 to TX1?!
 

嗨，没有运气…很可能PIC18F26K42能做到这一点，因为它既有PPS又有CLC。它也有DMA，所以它可以做SFR到SFR传输；=）：DMA在RX1和TX2之间自动地没有SW执行。所以你可以在BooLoad模式下做特殊的中断例程，或者你使用ExtE。RNALLATE：伪代码：在你的主程序中，当传输完成时，需要有一个机制来退出引导加载模式。



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    Hi,
 
No luck...probably PIC18F26K42 would be able to do that because it has both PPS and CLC.
It also has DMA so it can do SFR to SFR transfer ;=)
Exemple : DMA between RX1 and TX2 automatically without SW execution.
So either you do special interrupt routines while in bootload mode, either you use external switch :
Pseudo-code :

RX1_interrupt()
{
read RX1
copy to TX2
clear RX1 INT flag
}
RX2_interrupt()
{
read RX2
copy to TX1
clear RX2 INT flag
}

in your main routine you need to have a mechanism to exit bootload mode when transmission is finished
 
Regards

嗨，RISC！我认为DMA不会有帮助。因为我必须从RX1 FiLand接收一个字节，然后通过TX2发送它，这是与直接连接相比的两倍。即使UART2以更高的速度运行，仍然会有一些延迟，这会混淆PC软件。我可以很容易地改变进程。SSOR，它们是PIN引脚兼容，但当我连接一些输入到CLC MCC的输出会产生一些警告，我不确定这将工作…



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    Hi, RISC!
I thing that DMA will not help.
There will be delay because I have to receive a byte from RX1 first and then send it through TX2 - this is twice the time compared to direct connection.
Even if UART2 runs on higher speed there is still some delay which confuses PC software.
I can easily change the processor, they are pin-pin compatible, but when I connect some input to the output of CLC MCC generates some warnings  and I am not sure that this will work...

我禁用两个串行端口，但由于一些奇怪的原因，我不能驱动GPIOS RC6和RB6？！



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    I disable both serial ports but by some strange reason I cannot drive GPIOS RC6 and RB6?!

在我的拙见中，我相信UART转发中的一些轻微的延迟不应该触及引导加载程序的协议。



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    In my humble opinion, I would believe that some slight delay in the UART forwarding should not hit the bootloader's protocol...

最后！它奏效了！我只是复制从UART1到UART2的引脚，反之亦然。谢谢大家！



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    At last!
It worked!
I simply copy pins from UART1 to UART2 and vice versa.
Thank you guys!

精彩，你怎么复制“别针”？你是用MCC（PIN Manager Grid）做的吗？RegardsPS：另一方面，我想我在PIC18F26K42i中找到了一个使用CLC的完整的HW解决方案，有一个截图，但是不可能附加它……（许可被拒绝！）！！！）基本上，您使用“与”门将不协调信号输出到另一个引脚（仅仅是一个“缓冲器功能”）。内部逻辑被用作一个输入引脚和一个输出引脚之间的简单缓冲器（仅仅是一对门延迟）纯硬件没有内部UART UAG.UART TX PC= & Gt；ClCl0在ClC1（RA0）＝& Gt；“4”中。输入和门“（3非活动）和最后一个输入＝ClC00= & gt；ClcOUT（RA1或其他可选择的PIN）＝第二的PICTx的第二PIC＝& gt；ClCl1在ClC2（RA2）＝& gt；“4输入和门”（3非活动）和最后的输入＝ClCl1= & gt；ClcOUT（RA1或其他可选择的PIN）＝＞Rx的PCREGARDS



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    Brilliant,
How did you "copy" the pins ?
Did you do it with MCC (Pin Manager grid) ?
Regards
 
PS:
On the other hand, I think I found a full HW solution using CLC in PIC18F26K42
 
I have a screenshot but impossible to attach it....(permission denied !!!)
 
Basically you use AND GATE to output the incomming signal to another pin (just a "buffer function")
The internal logic is used as a simple buffer between one input pin and one output pin (just a couple of gate delay) pure hardware no internal UART usage.
UART TX PC => CLCIN0 in CLC1 (RA0) => "4 input AND GATE" (3 inactive) and the last input = CLCIN0 => CLCOUT (RA1 or other selectable pin) => RX of 2nd PIC
TX of 2nd PIC => CLCIN1 in CLC2 (RA2) =>  "4 input AND GATE" (3 inactive) and the last input = CLCIN1 =>  CLCOUT (RA1 or other selectable pin) => RX of PC
 
Regards

嗨，RISC！谢谢你的帮助！我只是禁用所有，包括中断。然后在while循环中读取和设置或清除相应的引脚！也许它也会被打断吗？我稍后再检查。我需要在TX线上测量一些不活动来理解进程何时结束并重新启动。



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    Hi, RISC!
Thank you for your help!
I simply disabled all, including interrupts.
Then in while loop I read and set or clear corresponding pins!
Maybe it will work with interrupts also?!
I will check this later.
I need inerrupt to measure some inactivity on TX line to understand when the process is ended and restart!