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????????UART??????????????????????????????????????????????????????????????????????????????????????????????????1. ?????????????????????2. ????????????SBUF registers??????3. ???????????????????????????4. ?????????????????????????5. ?????????????1????2?????????6. ????????????????????????????????????????????????????????????????????????????????????????????```cvoid delay(long d) {    while(d--) ;}void uar1tByte(char byte) {    SBUF = byte;    while(!TI);    TI = 0;}void uart1String(char *s) {    while(*s) {        uar1tByte(*s++);    }}void uart1Figure(long figure) {    if(figure >= 100000000) uart1tByte('0' + figure/100000000%10);    if(figure >= 10000000) uart1tByte('0' + figure/10000000%10);    if(figure >= 1000000) uart1tByte('0' + figure/1000000%10);    if(figure >= 100000) uart1tByte('0' + figure/100000%10);    if(figure >= 10000) uart1tByte('0' + figure/10000%10);    if(figure >= 1000) uart1tByte('0' + figure/1000%10);    if(figure >= 100) uart1tByte('0' + figure/100%10);    if(figure >= 10) uart1tByte('0' + figure/10%10);    if(figure >= 0) uart1tByte('0' + figure/1%10);}void uart1TiINIT() {    unsigned int INITValue = 256 - (11059200/12/32/9600);    EA = 1; ES = 1; SCON = 0x50; TMOD = 0x0F;    TMOD |= 0x20; TH1 = TL1 = INITValue; ET1 = 0; TR1 = 1;}void uart1T2INIT() {    unsigned int INITValue = 65536 - (11059200/32/9600);    EA = 1; ES = 1; SCON = 0x50; T2CON = 0x34;    TH2 = RCAP2H = INITValue / 256; TL2 = RCAP2L = INITValue % 256; TR2 = 1;}int main() {    uart1T2INIT();    while(1) {        i++;        uart1String("i = ");        uart1Figure(i);        uart1String("\r\n");        delay(10000);    }}

????????UART?????????????????????????????

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