UART pic18到pic18

Question

不能发送字符＆＃39; C＆＃39;并在接收器上显示。 LCD打印一些特殊字符，没有＆＃39; C＆＃39; ...;（

的发射机：

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) {
    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);

   }
 }
}

取消两个图片18F26K22，新到串口...不知道如何测试它没有设备，我的代码是好的吗？我没有使用Proteus，从事金属加工。感谢。

Answer 1

我遇到过这个问题，事实是这个角色不是一个无符号的字符。所以试着施展它。

...
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);
...