HAL for Re:ARM (LPC1768) architecture
This commit is contained in:
Christopher Pepper
committed by
Scott Lahteine
Scott Lahteine
parent
f3e562e46e
commit
44b0c186a6
205
Marlin/src/HAL/HAL_LPC1768/serial.h
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205
Marlin/src/HAL/HAL_LPC1768/serial.h
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef HAL_SERIAL_H_
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#define HAL_SERIAL_H_
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#include <stdarg.h>
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#include <stdio.h>
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extern "C" {
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#include <debug_frmwrk.h>
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}
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/*
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* Generic RingBuffer
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* T type of the buffer array
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* S size of the buffer (must be power of 2)
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*
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* todo: optimise
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*/
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template <typename T, uint32_t S> class RingBuffer {
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public:
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RingBuffer() {
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index_read = 0;
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index_write = 0;
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}
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bool peek(T *value) volatile {
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if(value == 0 || available() == 0)
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return false;
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*value = buffer[buffer_mask & index_read];
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return true;
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}
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uint32_t available() volatile {
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return buffer_mask & (index_write - index_read);
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}
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uint32_t free() volatile {
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return buffer_size - available();
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}
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T read() volatile {
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if(index_write != index_read) {
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T val = buffer[buffer_mask & index_read];
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++index_read;
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return val;
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}
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return T(0);
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}
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bool write( T value) volatile {
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uint32_t next_head = buffer_mask & (index_write + 1);
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if(next_head != index_read) {
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buffer[buffer_mask & index_write] = value;
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index_write = next_head;
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return true;
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}
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return false;
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}
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bool empty() volatile {
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return index_read == index_write;
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}
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bool full() volatile {
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return index_read == index_write + 1;
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}
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void clear() volatile {
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index_read = index_write = 0;
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}
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private:
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static const uint32_t buffer_size = S;
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static const uint32_t buffer_mask = buffer_size - 1;
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volatile T buffer[buffer_size];
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volatile uint32_t index_write;
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volatile uint32_t index_read;
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};
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class HalSerial {
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public:
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HalSerial() {
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host_connected = false;
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}
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void begin(int32_t baud) {
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}
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char read() {
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return (char)receive_buffer.read();
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}
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void write(char c) {
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_DBC(c); //Duplicate output over uart0
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if(host_connected) transmit_buffer.write((uint8_t)c);
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}
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operator bool() {
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return true;
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}
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uint16_t available() {
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return (uint16_t)receive_buffer.available();
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}
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void flush() {
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}
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void printf(const char *format, ...) {
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static char buffer[256];
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va_list vArgs;
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va_start(vArgs, format);
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int length = vsnprintf((char *) buffer, 256, (char const *) format, vArgs);
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va_end(vArgs);
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if (length > 0 && length < 256) {
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_DBG(buffer); //Duplicate output over uart0
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if (host_connected) {
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for (int i = 0; i < length;) {
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if (transmit_buffer.write(buffer[i])) {
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++i;
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}
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}
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}
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}
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}
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void print(const char value[]) {
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printf("%s" , value);
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}
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void print(char value, int = 0) {
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printf("%c" , value);
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}
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void print(unsigned char value, int = 0) {
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printf("%u" , value);
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}
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void print(int value, int = 0) {
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printf("%d" , value);
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}
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void print(unsigned int value, int = 0) {
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printf("%u" , value);
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}
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void print(long value, int = 0) {
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printf("%ld" , value);
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}
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void print(unsigned long value, int = 0) {
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printf("%lu" , value);
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}
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void print(float value, int round = 6) {
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printf("%f" , value);
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}
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void print(double value, int round = 6) {
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printf("%f" , value );
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}
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void println(const char value[]) {
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printf("%s\n" , value);
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}
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void println(char value, int = 0) {
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printf("%c\n" , value);
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}
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void println(unsigned char value, int = 0) {
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printf("%u\r\n" , value);
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}
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void println(int value, int = 0) {
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printf("%d\n" , value);
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}
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void println(unsigned int value, int = 0) {
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printf("%u\n" , value);
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}
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void println(long value, int = 0) {
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printf("%ld\n" , value);
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}
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void println(unsigned long value, int = 0) {
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printf("%lu\n" , value);
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}
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void println(float value, int round = 6) {
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printf("%f\n" , value );
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}
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void println(double value, int round = 6) {
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printf("%f\n" , value );
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}
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void println(void) {
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print('\n');
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}
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volatile RingBuffer<uint8_t, 128> receive_buffer;
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volatile RingBuffer<uint8_t, 128> transmit_buffer;
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volatile bool host_connected;
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};
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#endif /* MARLIN_SRC_HAL_HAL_SERIAL_H_ */
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