Question

i have a problem with pic18f452 and uart i use simplest code like that:

 UART1_Init(9600);              // Initialize UART module at 9600 bps
 Delay_ms(100);                 // Wait for UART module to stabilize

无论在哪里,

  UART1_Write_Text("HELLO2");
  Delay_ms(1000);

also i have in my hardware lcd module it works very fine but my received data on pc is a scrap like that

???m

i have checked all connection sothand time nothing wrong also i have changed MAX232 ic but with no luck ?! my hardware is like that enter image description here

finall all my connections are ok (polarity and every thing else ?) EDIT : i use mikroc as a compiler

Answer 1

看起来像一种 b差率错误。您是否检查过你的振荡环境造成预期的频率? 您使用的系列图书馆是否预期会出现某些24小时的频率,而且你确信,你是在这种频率下运行的,还是用一套频率开展工作的,你正确地把你使用的频率告知系列图书馆? 此外,最好把收到的按母体分类,而不是仅仅视为ASCII。

Answer 2

起始点、数据比数、对等和截点是什么? 这两项目标是否相同?

Answer 3

It happens when you have loose connections i.e. from max 232 to Pic & from max 232 to PC. Try checking the fluctuations over the transmit pin or usr Oscilloscope to see the ASCII values of Hello World alphabets.

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