Michael Kuchnik / Mbed 2 deprecated uLCD_Multiscreen

Allows users to seamlessly write to 2 or 3 uLCD screens as if they were one large screen.

Dependencies:   4DGL-uLCD-SE mbed-rtos mbed

ScreenUpdater.cpp@0:15002a72309b, 2015-03-11 (annotated)

Committer:
Mkuchnik3
Date:
Wed Mar 11 21:33:18 2015 +0000
Revision:
0:15002a72309b
First Commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Mkuchnik3 0:15002a72309b 1 #include "ScreenUpdater.h"
Mkuchnik3 0:15002a72309b 2 #include "uLCD_4DGL.h"
Mkuchnik3 0:15002a72309b 3 #include "mbed.h"
Mkuchnik3 0:15002a72309b 4 static void uLCD_thread_func(void const *args) {
Mkuchnik3 0:15002a72309b 5 //printf("Thread alive.");
Mkuchnik3 0:15002a72309b 6 uLCD_4DGL *lcd = ((uLCD_Thread_Args*)args)->uLCD;
Mkuchnik3 0:15002a72309b 7 std::queue<Command*> *commands = ((uLCD_Thread_Args*)args)->commands;
Mkuchnik3 0:15002a72309b 8 Mutex *commands_mutex = ((uLCD_Thread_Args*)args)->commands_mutex;
Mkuchnik3 0:15002a72309b 9 while (true) {
Mkuchnik3 0:15002a72309b 10 if (!commands->empty()) {
Mkuchnik3 0:15002a72309b 11 commands_mutex->lock();
Mkuchnik3 0:15002a72309b 12 Command *command = commands->front();
Mkuchnik3 0:15002a72309b 13 commands->pop();
Mkuchnik3 0:15002a72309b 14 command->execute(lcd);
Mkuchnik3 0:15002a72309b 15 delete command;
Mkuchnik3 0:15002a72309b 16 commands_mutex->unlock();
Mkuchnik3 0:15002a72309b 17 } else {
Mkuchnik3 0:15002a72309b 18 //printf("empty.");
Mkuchnik3 0:15002a72309b 19 Thread::signal_wait(0x1);
Mkuchnik3 0:15002a72309b 20 }
Mkuchnik3 0:15002a72309b 21 }
Mkuchnik3 0:15002a72309b 22 }
Mkuchnik3 0:15002a72309b 23 ScreenUpdater::ScreenUpdater(uLCD_4DGL *uLCD) {
Mkuchnik3 0:15002a72309b 24 //printf("ScreenUpdater booting.");
Mkuchnik3 0:15002a72309b 25 uLCD_Thread_Args args = {uLCD, &commands, &commands_mutex};
Mkuchnik3 0:15002a72309b 26 Thread *_thread = new Thread(uLCD_thread_func, &(args), osPriorityHigh);
Mkuchnik3 0:15002a72309b 27 uLCD_thread = _thread;
Mkuchnik3 0:15002a72309b 28 //printf("Thread creation complete\n");
Mkuchnik3 0:15002a72309b 29 this->uLCD = uLCD;
Mkuchnik3 0:15002a72309b 30 }
Mkuchnik3 0:15002a72309b 31 void ScreenUpdater::addCommand(Command* _command) {
Mkuchnik3 0:15002a72309b 32 //printf("I'm here!");
Mkuchnik3 0:15002a72309b 33 commands_mutex.lock();
Mkuchnik3 0:15002a72309b 34 commands.push(_command);
Mkuchnik3 0:15002a72309b 35 //printf("Adding command %d. State %d\n", commands.size(), uLCD_thread->get_state());
Mkuchnik3 0:15002a72309b 36 commands_mutex.unlock();
Mkuchnik3 0:15002a72309b 37 uLCD_thread->signal_set(0x1);
Mkuchnik3 0:15002a72309b 38 }
Mkuchnik3 0:15002a72309b 39 ScreenUpdater::~ScreenUpdater() {
Mkuchnik3 0:15002a72309b 40 //printf("KILLING THREAD!!!!!!!!!!!!!!\n");
Mkuchnik3 0:15002a72309b 41 uLCD_thread->terminate();
Mkuchnik3 0:15002a72309b 42 }