add check_battery

Code/thermal_printer/config.h

@@ -209,6 +209,7 @@ typedef struct _CONFIG
 
   uint16_t wordgap:10;//1023 max
   uint8_t max_pts;// max pts in print_dots_8bit_split
+  uint8_t lock;
   
   Margin margin;
   FONT*font;
@@ -225,6 +226,13 @@ typedef struct _SerialCache{
   uint8_t data[77];//384/5
 }SerialCache;
 
+typedef struct _TimeRec{
+  unsigned int time;
+  uint8_t last_status;
+  uint8_t check;
+  
+}TimeRec;
+
 void PrintDots8bit(uint8_t *Array, uint8_t characters,uint8_t feed_num);
 
 uint8_t invert_bit(uint8_t a);

Code/thermal_printer/devterm_thermal_printer.c

@@ -45,6 +45,8 @@ FONT current_font;
 
 CONFIG g_config;
 
+TimeRec battery_chk_tm;
+
 int printf_out(CONFIG*cfg, char *format, ...) {
    va_list args;
    int rv;
@@ -119,8 +121,13 @@ void init_printer(){
   g_config.density = 0;
 
   g_config.feed_pitch = 2;
-  g_config.max_pts = 1;
+  g_config.max_pts = 2;
+  g_config.lock = 0;
   
+  
+  battery_chk_tm.time = millis();
+  battery_chk_tm.last_status = 0;
+  battery_chk_tm.check = 0;
 }
 
 const  char url[]  ={"Powered by clockworkpi.com"};
@@ -659,6 +666,88 @@ void parse_serial_stream(CONFIG*cfg,uint8_t input_ch){
   socat -d -d pty,link=/tmp/DEVTERM_PRINTER_OUT,raw,echo=0 pty,link=/tmp/DEVTERM_PRINTER_IN,raw,echo=0
 */
 
+int read_bat_cap(CONFIG*cfg) {
+  long ret;
+  char c[12];
+  FILE *fptr;
+  if ((fptr = fopen(BAT_CAP, "r")) == NULL) {
+    PRINTF("Error! Battery File cannot be opened\n");
+    // Program exits if the file pointer returns NULL.
+    return -1;
+  }
+
+  fscanf(fptr, "%[^\n]", c);
+  //printf("Data from the file:%s\n", c);
+  fclose(fptr);
+
+  ret = strtol(c, NULL, 10);  
+  
+  return (int)ret;
+  
+}
+
+int bat_cap_to_pts(CONFIG*cfg,int bat) {
+  int pts;
+  
+  pts = (int)round( (float)bat/10.0 ) + 1;
+  return pts;
+}
+
+
+void print_lowpower(CONFIG*cfg) {
+  
+  int i;
+  char*msg = "low power,please charge";
+  
+  reset_cmd();
+  
+  for(i=0;i<strlen(url);i++) {
+    parse_serial_stream(cfg,msg[i]);
+    
+  }
+  parse_serial_stream(cfg,10);
+  reset_cmd();
+    
+}
+
+int check_battery(CONFIG*cfg){
+
+  int bat_cap;
+  
+  bat_cap = 0;
+  
+  if(  millis() - battery_chk_tm.time > 200) {
+    
+    bat_cap = read_bat_cap(cfg);
+    
+    if( bat_cap < 0){
+      cfg->max_pts = 1;//no battery ,so set to the slowest
+      cfg->lock = 0;// unlock printer anyway
+    }
+    
+    if(bat_cap >=0 && bat_cap < 90) {
+      
+      if(cfg->lock == 0) {
+        print_lowpower(cfg);
+        
+      }
+      cfg->lock =1;
+      reset_cmd(); // clear all serial_cache
+    }else {
+      
+      cfg->max_pts = bat_cap_to_pts(cfg,bat_cap);
+      
+      cfg->lock = 0;
+    }
+    
+    battery_chk_tm.time = millis();
+    
+  }
+  
+  return 0;
+
+}
+
 #define FIFO_FILE "/tmp/DEVTERM_PRINTER_OUT"
 
 void loop() {
@@ -681,6 +770,9 @@ void loop() {
      	g_config.fp = fp; 
       while(1)
       {
+        check_battery(&g_config);
+        
+        if(g_config.lock ==0) {
           fread(readbuf,1, 1,fp);
           //printf("read %x",readbuf[0]);
           if(g_config.state ==  PRINT_STATE) {
@@ -695,6 +787,7 @@ void loop() {
 	      	  parse_serial_stream(&g_config,readbuf[0]);
 	        }
         }
+      }
       fclose(fp);
       g_config.fp = NULL;
     }

Code/thermal_printer/printer.c

@@ -423,29 +423,6 @@ int glob_file(char*av) {
 
 #endif
 
-int bat_cap_to_pts(CONFIG*cfg) {
-  int pts;
-  long ret;
-  char c[12];
-  FILE *fptr;
-  if ((fptr = fopen(BAT_CAP, "r")) == NULL) {
-    printf("Error! Battery File cannot be opened\n");
-    // Program exits if the file pointer returns NULL.
-    return 0;
-  }
-
-  fscanf(fptr, "%[^\n]", c);
-  //printf("Data from the file:%s\n", c);
-  fclose(fptr);
-
-  ret = strtol(c, NULL, 10);
-  
-  pts = (int)round( (float)ret/10.0 ) + 1;
-  return pts;
-}
-
-
-
 uint8_t print_lines8(CONFIG*cfg) {
   uint8_t i,j,k;
   int8_t w;
@@ -477,8 +454,6 @@ uint8_t print_lines8(CONFIG*cfg) {
   row = 0;
   rv = IsPaper();
   
-  cfg->max_pts = bat_cap_to_pts(cfg);
-
   data = (uint8_t*)malloc(sizeof(uint8_t)*(pad+1));
   i=0;
 
@@ -607,7 +582,7 @@ uint8_t print_image8(CONFIG*cfg){
   addr = 0;
   
   rv = IsPaper();
-  cfg->max_pts = bat_cap_to_pts(cfg);
+
   while(y < height )
   {
     x=0;