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无法发送字符“C”并显示在接收器图片上。LCD打印一些特殊字符，没有'C'......;（

发射器：

char uart_rd;
int uart_rdi;

sbit LCD_RS at LATB0_bit;
sbit LCD_EN at LATB1_bit;
sbit LCD_D4 at LATB5_bit;
sbit LCD_D5 at LATB4_bit;
sbit LCD_D6 at LATB3_bit;
sbit LCD_D7 at LATB2_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB5_bit;
sbit LCD_D5_Direction at TRISB4_bit;
sbit LCD_D6_Direction at TRISB3_bit;
sbit LCD_D7_Direction at TRISB2_bit;


void main() {
  ANSELA  = 0;                     // Configure AN pins as digital
  ANSELB = 0;
  ANSELC = 0;

  Lcd_Init();

  UART2_Init(9600);               // Initialize UART module at 9600 bps
  Delay_ms(100);                  // Wait for UART module to stabilize



 while (1) {

   UART2_Write('C');
   }
 }

接收者：

char uart_rd;
int uart_rdi;

sbit LCD_RS at LATB0_bit;
sbit LCD_EN at LATB1_bit;
sbit LCD_D4 at LATB5_bit;
sbit LCD_D5 at LATB4_bit;
sbit LCD_D6 at LATB3_bit;
sbit LCD_D7 at LATB2_bit;

sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB5_bit;
sbit LCD_D5_Direction at TRISB4_bit;
sbit LCD_D6_Direction at TRISB3_bit;
sbit LCD_D7_Direction at TRISB2_bit;


void main() {
  ANSELA  = 0;                     // Configure AN pins as digital
  ANSELB = 0;
  ANSELC = 0;

  Lcd_Init();

  UART2_Init(9600);               // Initialize UART module at 9600 bps
  Delay_ms(100);                  // Wait for UART module to stabilize


 while (1) {
    if (UART2_Data_Ready()) {     // If data is received,
     uart_rdi = UART2_Read();     // read the received data,
       uart_rd = uart_rdi;
      LCD_Out(1,1, uart_rd);

   }
 }
}

Unsing 两张图片 18F26K22，串口新手...不知道如何测试它，因为没有设备，我的代码是好的吗？我没有使用 Proteus，在金属上工作。谢谢。

4

1 回答 1

2

我曾经遇到过这个问题，事实是该字符不是无符号字符。所以尝试投射它。

...
while (1) {
if (UART2_Data_Ready()) {     // If data is received,
  uart_rdi = UART2_Read();     // read the received data,
  uart_rd = uart_rdi;
  LCD_Out(1,1, (unsigned char) uart_rd);
...
于 2014-05-21T04:07:36.843 回答