From 07493b94b141506e051b0adb9f68132ebfc583c0 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Thu, 8 Nov 2018 19:47:52 +0800
Subject: Added the max7219 stuff.

---
 rpi/max7219/lajimon_w.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 rpi/max7219/lajimon_w.c

(limited to 'rpi/max7219/lajimon_w.c')

diff --git a/rpi/max7219/lajimon_w.c b/rpi/max7219/lajimon_w.c
new file mode 100644
index 0000000..31c7c46
--- /dev/null
+++ b/rpi/max7219/lajimon_w.c
@@ -0,0 +1,118 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/wait.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "max7219.h"
+int pipefd[2][2],term,pid;
+char buf[1024];
+char disp[32][8];
+double histcpu[16],histmem[8],histsw[8];
+void _child()
+{
+	close(pipefd[0][0]);close(pipefd[1][1]);
+	dup2(pipefd[1][0],STDIN_FILENO);
+	dup2(pipefd[0][1],STDOUT_FILENO);
+	close(pipefd[0][1]);close(pipefd[1][0]);
+	execlp("/usr/bin/ksysguardd","ksysguardd",NULL);
+}
+void terminate(int e)
+{
+	term=1;
+}
+void display()
+{
+	unsigned short batch[4];
+	int dd[32]={0},i,j;
+	for(i=0;i<32;++i)
+	for(j=0;j<8;++j)
+	dd[j+(i&0x18)]|=disp[i][j]<<(i&7);
+	for(i=0;i<8;++i)
+	{
+		for(j=0;j<4;++j)
+			batch[j]=(i+1)<<8|dd[j*8+i];
+		max7219_batch(batch);
+	}
+}
+void _main()
+{
+	int i,j,r;
+	term=0;
+	signal(SIGINT,terminate);
+	signal(SIGTERM,terminate);
+	signal(SIGQUIT,terminate);
+	close(pipefd[0][1]);
+	close(pipefd[1][0]);
+	max7219_init();
+	sleep(1);
+	read(pipefd[0][0],buf,1024);
+	while(!term)
+	{
+		write(pipefd[1][1],"cpu/system/TotalLoad\n",21);
+		r=read(pipefd[0][0],buf,1024);buf[r]=0;
+		if(r<=0)continue;
+		sscanf(buf,"%lf",&histcpu[15]);
+		{
+			int memtot,memavail,swtot,swfree,tr=0;
+			FILE* fm=fopen("/proc/meminfo","r");
+			while(fgets(buf,1024,fm))
+			{
+				tr+=sscanf(buf,"MemTotal: %d",&memtot);
+				tr+=sscanf(buf,"MemAvailable: %d",&memavail);
+				tr+=sscanf(buf,"SwapTotal: %d",&swtot);
+				tr+=sscanf(buf,"SwapFree: %d",&swfree);
+			}
+			if(tr-4)continue;
+			histmem[7]=100*(1-1.*memavail/memtot);
+			histsw[7]=100*(1-1.*swfree/swtot);
+		}
+		for(i=0;i<15;++i)histcpu[i]=histcpu[i+1];
+		for(i=0;i<7;++i)histmem[i]=histmem[i+1],histsw[i]=histsw[i+1];
+		printf("%f %f %f\n",histcpu[15],histmem[7],histsw[7]);
+		memset(disp,0,sizeof(disp));
+		for(i=0;i<16;++i)
+		for(j=0;j<8;++j)
+		if(histcpu[i]>11*(j+1))disp[i][j]=1;
+		for(i=0;i<8;++i)
+		for(j=0;j<8;++j)
+		{
+			if(histmem[i]>11*(j+1))disp[16+i][j]=1;
+			if(histsw[i]>11*(j+1))disp[24+i][j]=1;
+		}
+		disp[0][7]=disp[1][7]=disp[2][7]=1;
+		disp[0][6]=1;
+		disp[0][5]=disp[1][5]=disp[2][5]=1;
+		disp[16][7]=disp[17][7]=disp[18][7]=1;
+		disp[16][6]=disp[17][6]=disp[18][6]=1;
+		disp[16][5]=disp[18][5]=1;
+		disp[24][7]=disp[25][7]=1;
+		disp[24][6]=disp[25][6]=disp[26][6]=1;
+		disp[25][5]=disp[26][5]=1;
+		display();
+		sleep(2);
+	}
+	max7219_deinit(1);
+	write(pipefd[1][1],"quit\n",5);
+	waitpid(pid,NULL,0);
+	close(pipefd[0][0]);
+	close(pipefd[1][1]);
+}
+int main()
+{
+	if(pipe(pipefd[0]))return puts("pipe()"),1;
+	if(pipe(pipefd[1]))return puts("pipe()"),1;
+	switch(pid=fork())
+	{
+		case -1:return puts("fork()"),1;
+		case 0:
+			_child();
+		break;
+		default:
+			_main();
+		break;
+	}
+	return 0;
+}
-- 
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