uart1_mode2.h

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#ifndef STC15_UART1MODE2H
#define STC15_UART1MODE2H
 
#include <stdint.h>
 
#include <sys.h>
#include <bits.h>
#include <interrupt.h>
#include <uart1_shared.h>
#include <uart1_9bit_shared.h>
 
typedef enum {
    baudrate_172800 = 172800U,
    baudrate_345600 = 345600U
} uart1_mode2_baudrate_t;
 
 
#define uart1_mode2_init(pins, baudRate)                                        \
do {                                                                            \
    enable_mcu_interrupts();                                                    \
    enable_uart1_interrupt();                                                   \
                                                                                \
    /* PCON.7 always set to 1. Is it error? */                                  \
    baudRate == baudrate_345600 ? bit_set(PCON, SBIT7) : bit_clr(PCON, SBIT7);  \
                                                                                \
    /* SM1 = 1, SM0 = 0 to select UART1 mode2 */                                \
    SCON = 0x90;                                                                \
                                                                                \
    /* Set AUXR1 bits 6, 7 to select RxD/TxD pins */                            \
    AUXR1 &= 0x3F;                                                              \
    AUXR1 |= pins;                                                              \
} while (0)
 
#endif