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Using Built in Baud rate generator on 89C669

Andy Taylor

Hi,

Does anyone have any sample code that shows how to set up uart 0 to use the internal Baud rate generator ?

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  • 0

    Hi

    #define Kristall        19660800
#define Baud            19200
#define	BRATE		(Kristall/Baud)-16

void    StartRS232(void)
{
BRGR0 = BRATE & 0x00ff;
BRGR1 = (BRATE & 0xff00) / 256;
SM0_0 = 0;
SM1_0 = 1;
SM0_1 = 0;
SM1_1 = 1;
RCLK = 1;
TCLK = 1;
BRGCON = 0x03;
REN_0 = 1;
REN_1 = 1;
TI_0 = 1;
TI_1 = 1;
}

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  • 0

    Hi

    #define Kristall        19660800
#define Baud            19200
#define	BRATE		(Kristall/Baud)-16

void    StartRS232(void)
{
BRGR0 = BRATE & 0x00ff;
BRGR1 = (BRATE & 0xff00) / 256;
SM0_0 = 0;
SM1_0 = 1;
SM0_1 = 0;
SM1_1 = 1;
RCLK = 1;
TCLK = 1;
BRGCON = 0x03;
REN_0 = 1;
REN_1 = 1;
TI_0 = 1;
TI_1 = 1;
}

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