ESP8266 Community Forum

- Thu Nov 28, 2019 10:08 pm #84776 The program is a routine. Is there anything else I need to set? RS485 connected to serial assistant, no data

#include <Lpc213x.H>

#define UART_BPS 9600
#define FPCLK 12000000


typedef unsigned int uint32;
typedef unsigned short uint16;
typedef unsigned char uint8;


void DelayNS (uint32 dly)
{
        uint32 i;
        for (; dly> 0; dly--)
        for (i = 0; i <50000; i ++);
}


void UART1_init (void)
{
        uint16 Fdiv;
        U1LCR = 0x83;
        Fdiv = (FPCLK / 16) / UART_BPS;
        U1DLM = Fdiv / 256;
        U1DLL = Fdiv% 256;
        U1LCR = 0x03;
}

void UART1_SendByte (uint8 data)
{
        U1THR = data;
        while ((U1LSR & 0x40) == 0);
}

void UART1_SendStr (uint8 const * str)
{
        while (1)
        {
                UART1_SendByte (* str ++);
                if (* str == '\ 0')
                                break;
        }
}

int main (void)
{
        PINSEL0 = 0x50000;
        UART1_init ();
        while (1)
        {
                UART1_SendStr ("welcome! \ N");
                DelayNS (100);

        
        }
        return (0);
}

- Tue Jul 14, 2020 1:17 am #87883 I think this guide will help you... https://www.electronicwings.com/arm7/lpc2148-uart0

Regards
Shery

AppValley