代码配置器波特率设置错误

我建立了一个新的项目，配置振荡器、引脚等，并设置UART2为9600波特，所有使用MCC。初级OSC是一个8MHz晶体。fCy＝4MHz。两者都在范围上进行了验证。每隔1/2秒发送一个“u”，包括“McCyGealEngDyFrase/MCC.H”，定义timeOUT 500 000 UINT 16t计数；UINT8YT数据；/*主应用程序*/int main（空隙）{//初始化设备StReSimulalIZE（）；计数＝0；数据＝“u”；（1）{Le11Sethh（）；UART2X写（数据）；（计数+++T；TimeOUT）；计数＝0；Re11StLoWo（）；而（C+++lt；TimeIOUT）；计数＝0；}在作用域上查看U2TX。字符位模式是正确的，但位宽度是26 US -4X太快。查看UART2.C并找到MCC集BRG到0x19，但也设置BRGH到1使用MCC下拉来清除BRGH，保持9600波特并重复：它现在给了我416位宽度-4X太慢。如果我手动编辑U2MODE（BRG= 0x19，BRGH 0）I可以得到正确的104US比特周期，但是如果在MCC改变之后重新生成它，它又将它设置为416个-讨厌。看起来MCC不与BRG的设置协调BRG计算。这是MCC和PIC24F16KA102版本的已知问题吗？MCC V3.55.1MPLABX V4.15XC16 V1.33 PIC24F16KA102目标



      以下为原文

    I set up a new project, configured the oscillator, pins, etc. and set up UART2 for 9600 baud, all using MCC.

The Primary Osc is an 8MHz crystal. Fcy = 4MHz. Both verified on scope. (RB8 on, off, on, off in successive instructions).

Send 'U' about every 1/2 second:

#include "mcc_generated_files/mcc.h"
#define TIME_OUT 50000
uint16_t count;
uint8_t data;
/*
Main application
*/
int main(void)
{
// initialize the device
SYSTEM_Initialize();
count = 0;
data = 'U';

while (1)
{
LED1_SetHigh();
UART2_Write(data);
while (count++ < TIME_OUT);
count = 0;
LED1_SetLow();
while (count++ < TIME_OUT);
count = 0;
}
Look at U2TX on scope. Character bit pattern is correct but bit width is 26 us - 4x too fast.

Look in uart2.c and find MCC sets BRG to 0x19 but also sets BRGH to 1

Using MCC drop-down to clear BRGH, keep 9600 baud and repeat: it now gives me a 416 us bit width - 4x too slow.

If I edit U2MODE manually (BRG = 0x19, BRGH 0) I can get the correct 104us bit period, but if I re-generate after an MCC change it sets it back to 416 us again - annoying.

Looks like MCC does not co-ordinate BRG calculation with its setting of BRG. Is this a known problem with this version of MCC and the PIC24F16KA102?

MCC v3.55.1
MPLABX v4.15
XC16 v1.33
PIC24F16KA102 target