51 MCU serial port sends a string to the computer C program, which has been tested by Ben Bu Yi and can be used. The serial port needs a 232-TTL level conversion
. The sent character information can be seen through the serial port debugging assistant. The baud rate is 9600
#include
#include
//--------------------------------
char *name_month(int n);
void Delay(int x);
void put(char str);
void initUart(void);
void putString(unsigned char const *pstr); //const //
--------------------------------
void put(char str)
{
SBUF=str;
while(!TI); TI
=0;
}
//-------------------------------- void initUart
(void)
{
TMOD=0x20
; SCON
=
0x50 ; TH1= 250; TL1 = 250;
TR1 = 1;
EA = 1; ; } //--------------------------------- char *name_month(int n) { static char *name[]= { "Illegal month\n", "January\n", "February\n", "March\n", "April\n", "May\n", "June\n", "July\n", "August\n", "September\n", "October\n", "November\n", "December" mber\n" }; return((n<1||n>12) ? name[0]:name[n]); } //---------------------------------------- void putString(unsigned char const *pstr)//const { while(1) { if(*pstr=='\0') break; put(*pstr++); } } //---------------------------------------- void main(void) { int i; char *s; initUart(); putString("I come here pointer!\n"); for (i=1;i<13;i++) { s=name_month(i); while(1) { if (*s=='\0') break; put(*s++); } Delay(1000); } }
Reference address：51 MCU serial port sends string to computer C program
. The sent character information can be seen through the serial port debugging assistant. The baud rate is 9600
#include
#include
//--------------------------------
char *name_month(int n);
void Delay(int x);
void put(char str);
void initUart(void);
void putString(unsigned char const *pstr); //const //
--------------------------------
void put(char str)
{
SBUF=str;
while(!TI); TI
=0;
}
//-------------------------------- void initUart
(void)
{
TMOD=0x20
; SCON
=
0x50 ; TH1= 250; TL1 = 250;
TR1 = 1;
EA = 1; ; } //--------------------------------- char *name_month(int n) { static char *name[]= { "Illegal month\n", "January\n", "February\n", "March\n", "April\n", "May\n", "June\n", "July\n", "August\n", "September\n", "October\n", "November\n", "December" mber\n" }; return((n<1||n>12) ? name[0]:name[n]); } //---------------------------------------- void putString(unsigned char const *pstr)//const { while(1) { if(*pstr=='\0') break; put(*pstr++); } } //---------------------------------------- void main(void) { int i; char *s; initUart(); putString("I come here pointer!\n"); for (i=1;i<13;i++) { s=name_month(i); while(1) { if (*s=='\0') break; put(*s++); } Delay(1000); } }
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