C8051F_uart_test.rar_C8051F_uart_test_C8051f keil_KEIL C8051F_ke

#include <c8051f120.h> #include "main.h" static void init_sysclk( void) { #ifdef FREQ_24 // external clock 24MHz SFRPAGE = CONFIG_PAGE; OSCXCN = 0x20; // set external CMOS Clock Mode(external CMOS clock input on XTAL1 pin) CLKSEL = 0x01; // SYSCLK derived from the External Oscillator circuit OSCICN = 0x03; #else int i = 0; SFRPAGE = CONFIG_PAGE; OSCXCN = 0x20; PLL0CN = 0x04; SFRPAGE = LEGACY_PAGE; #ifdef FREQ_48 FLSCL = 0x10; #elif defined FREQ_72 FLSCL = 0x20; #elif defined FREQ_96 FLSCL = 0x30; #endif SFRPAGE = CONFIG_PAGE; PLL0CN |= 0x01; PLL0DIV = 0x01; PLL0FLT = 0x01; #ifdef FREQ_48 PLL0FLT |= 0x20; #elif defined FREQ_72 PLL0FLT |= 0x10; #elif defined FREQ_96 PLL0FLT |= 0x00; #endif #ifdef FREQ_48 PLL0MUL = 0x02; #elif defined FREQ_72 PLL0MUL = 0x03; #elif defined FREQ_96 PLL0MUL = 0x04; #endif for (i = 0; i < 100; i++) ; // wait at least 5us for initialization PLL0CN |= 0x02; while ((PLL0CN & 0x10) == 0) ; CLKSEL = 0x02; // SYSCLK derived from the PLL. OSCICN = 0x03; #endif } void init_cpu_f120( void) { init_generic_port(); // disable watchdog timer WDTCN = 0xde; WDTCN = 0xad; // initialize oscillator init_sysclk(); // initialize crossbar and GPIO SFRPAGE = CONFIG_PAGE; P2MDOUT = 0x81; P3MDOUT = 0xff; // port pin output mode is configured as push-pull // P4-P6 push-pull, P7 open-drain P4MDOUT = 0xff; P5MDOUT = 0xff; P6MDOUT = 0xff; P7MDOUT = 0x00; // setup crossbar XBR2 = 0x44; // crossbar enabled, UART1 TX and RX routed to 2 Port pins XBR1 = 0x04; // INT1 routed to Port pin XBR0 = 0x14; // CEX0, CEX1 routed to 2 Port pins, // UART0 TX routed to P0.0, and RX routed to P0.1 // off-chip XRAM only SFRPAGE = EMI0_PAGE; EMI0CF = 0x3c; // init interrupt PT0 = 1; // high priority ET0 = 0; PX0 = 0; // low priority EX0 = 1; // init timers SFRPAGE = TMR2_PAGE; TMR2CN = 0x00; TMR2CF = 0x00; RCAP2L = 0xF3; RCAP2H = 0xFF; TR2 = 1; TMOD = 0x21; // Timer 1 mode 2, Timer0 mode 1 CKCON = 0x02; // Timer1 and Timer0 use system clock divided by 48 TH1 = 0xF3; TL1 = TH1; TR1 = 1; // start Timer1 // init UART0 SFRPAGE = UART0_PAGE; SCON0 = 0x50; // SCON0: mode 0, 8-bit UART, enable RX SSTA0 = 0x15; // initialize DAC0 SFRPAGE = DAC0_PAGE; DAC0CN = 0x84; REF0CN = 0x02; DAC0L = 0x00; DAC0H = 0xff; // enable ADC SFRPAGE = ADC0_PAGE; AD0EN = 1; } _u8 send_data_to_uart(bit bUART0, _u8 c, _u16 wait) { if (bUART0) { // to UART0 UPDATE_SFRPAGE(UART0_PAGE); SBUF0 = c; while (TRUE) { if (TI0) { //TI0 = 0; // clear TI0 SCON0 &= 0xfd; // clear TI_1 return TRUE; } if (!wait--) return FALSE; } } else { // to UART1 UPDATE_SFRPAGE(UART1_PAGE); SBUF1 = c; while (TRUE) { if (TI_1) { SCON1 &= 0xfd; // clear TI_1 return TRUE; } if (!wait--) return FALSE; } } } static _u8 get_byte_from_w77e58(_u8 *buf, _u16 wait) { UPDATE_SFRPAGE(UART0_PAGE); while (!RI_0) { if (!wait--) return FALSE; } SCON0 &= 0xfe; *buf = SBUF1; return TRUE; } void test_uart0(void){ unsigned char buf[10]; while(1){ send_data_to_uart(1,'c',50000); while(1){ if(get_byte_from_w77e58(buf,50000)){ if(buf[0]=='e') break; }; }; }; } void init(void){ DISABLE_IRQ(); init_cpu(); } int main(void){ init(); test_uart0(); return 0 ; }