50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#include "SerialPort.h"
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SerialPort::SerialPort() {
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if(!u) {
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LpcPinMap none = {-1, -1}; // unused pin has negative values in it
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LpcPinMap txpin = { 0, 28 }; // transmit pin that goes to rs485 driver chip
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LpcPinMap rxpin = { 0, 24 }; // receive pin that goes to rs485 driver chip
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LpcPinMap rtspin = { 1, 0 }; // handshake pin that is used to set tranmitter direction
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LpcUartConfig cfg = { LPC_USART1, 9600, UART_CFG_DATALEN_8 | UART_CFG_PARITY_NONE | UART_CFG_STOPLEN_2, true, txpin, rxpin, rtspin, none };
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u = new LpcUart(cfg);
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}
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}
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LpcUart *SerialPort::u = nullptr;
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SerialPort::~SerialPort() {
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/* DeInitialize UART peripheral */
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delete u;
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}
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int SerialPort::available() {
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return u->peek();
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}
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void SerialPort::begin(int speed) {
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u->speed(speed);
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}
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int SerialPort::read() {
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char byte;
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if(u->read(byte)> 0) return (byte);
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return -1;
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}
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int SerialPort::write(const char* buf, int len) {
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return u->write(buf, len);
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}
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int SerialPort::print(int val, int format) {
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// here only to maintain compatibility with Arduino interface
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(void) val;
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(void) format;
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return (0);
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}
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void SerialPort::flush() {
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while(!u->txempty()) __WFI();
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}
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