scrolling
This commit is contained in:
parent
f1fa53fab5
commit
20d44982da
1
TODO
1
TODO
@ -1,6 +1,5 @@
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- dynamic pages
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- refresh of dynamic pages (clock, loadavg)
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- scrolling
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- disk utilization (MB/GB)
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- mntpoints given in config
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163
lcd.c
163
lcd.c
@ -13,6 +13,7 @@
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#include "logging.h"
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#define _LCD_DEBUG 1
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#define _LCD_FAKE 1
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#define LCD_RESET_TIMEOUT_US 250000 /* 250ms */
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#define LCD_RESET_RETRY_TIMEOUT 10 /* 10s */
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@ -41,14 +42,17 @@ struct lcddev {
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int fd;
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struct termios oldtio;
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int backlight_time;
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enum lcdstate state;
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int (*button_cb)(struct lcddev *dev, int button, void *privdata);
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void *privdata;
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int backlight_state;
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int (*event_callback)(struct lcddev *dev, int event, void *privdata);
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void *event_privdata;
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const char *line_data[2];
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int scrollpos;
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int line_length[2];
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int scroll_speed;
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int scroll_pos;
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struct event_fd *read_event;
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struct event_timeout *reset_timeout;
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@ -92,9 +96,22 @@ static int lcd_open(struct lcddev *dev, const char *device)
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return 0;
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}
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#if (_LCD_DEBUG > 1)
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static void lcd_dump(const char *prefix, int len, int size, const char *buf)
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{
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int i;
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fprintf(stderr, "%s:[%d/%d]: ", prefix, len, size);
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for (i = 0; i < len; i++)
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fprintf(stderr, "0x%X ", (unsigned char)buf[i]);
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fprintf(stderr, "\n");
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}
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#endif
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static int lcd_read(struct lcddev *dev, const char *buf, int len)
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{
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int retval = 0, i, cnt = 0;
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int retval = 0, cnt = 0;
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while (cnt < len) {
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retval = read(dev->fd, (char *)buf + cnt, len - cnt);
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if (retval <= 0)
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@ -102,37 +119,27 @@ static int lcd_read(struct lcddev *dev, const char *buf, int len)
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cnt += retval;
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}
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#if _LCD_DEBUG
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fprintf(stderr, "lcd_read[%d/%d]: ", cnt, len);
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for (i = 0; i < cnt; i++)
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fprintf(stderr, "0x%X ", (unsigned char)buf[i]);
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fprintf(stderr, "\n");
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#if (_LCD_DEBUG > 1)
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lcd_dump("lcd_read", cnt, len, buf);
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#endif
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return (cnt != 0) ? cnt : retval;
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}
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static int lcd_write(struct lcddev *dev, char *buf, int len)
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{
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int retval, i;
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int retval = write(dev->fd, buf, len);
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retval = write(dev->fd, buf, len);
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#if _LCD_DEBUG
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fprintf(stderr, "lcd_write[%d/%d]: ", retval, len);
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for (i = 0; i < retval; i++)
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fprintf(stderr, "0x%X ", (unsigned char)buf[i]);
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if (len == 20) {
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fprintf(stderr, "'%-16s'", buf + 4);
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}
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fprintf(stderr, "\n");
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#if (_LCD_DEBUG > 1)
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lcd_dump("lcd_write", retval, len, buf);
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#endif
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return retval;
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}
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#if (_LCD_FAKE == 0)
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static int lcd_reset_retry_timeout_cb(void *privdata)
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{
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struct lcddev *dev = (struct lcddev *)privdata;
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dev->reset_timeout = NULL;
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lcd_reset(dev);
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return -1; /* singleshot */
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@ -150,16 +157,30 @@ static int lcd_reset_timeout_cb(void *privdata)
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return -1; /* singleshot */
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}
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#endif
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void lcd_reset(struct lcddev *dev)
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{
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#if (_LCD_DEBUG > 0)
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fprintf(stderr, "lcd_reset()\n");
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#endif
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char cmd[] = A125_CMD_RESET;
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lcd_write(dev, cmd, sizeof(cmd));
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dev->backlight_state = -1;
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#if (_LCD_FAKE == 0)
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dev->state = LCD_STATE_INITIALIZING;
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struct timeval tv = { .tv_usec = LCD_RESET_TIMEOUT_US };
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dev->reset_timeout = event_add_timeout(&tv, lcd_reset_timeout_cb, dev);
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#else
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dev->state = LCD_STATE_READY;
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/* trigger application to set data */
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dev->event_callback(dev, LCD_EVENT_INIT, dev->event_privdata);
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#endif
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}
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static int lcd_backlight(struct lcddev *dev, int mode)
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@ -167,9 +188,17 @@ static int lcd_backlight(struct lcddev *dev, int mode)
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if (dev->state != LCD_STATE_READY)
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return -1;
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#if (_LCD_DEBUG > 0)
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fprintf(stderr, "lcd_backlight(%d)\n", mode);
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#endif
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if (dev->backlight_state != mode) {
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char cmd[] = A125_CMD_BACKLIGHT;
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cmd[2] = (mode) ? 0x01 : 0x00;
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lcd_write(dev, cmd, sizeof(cmd));
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}
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dev->backlight_state = mode;
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return 0;
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}
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@ -179,6 +208,7 @@ static int lcd_backlight_timeout_cb(void *privdata)
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dev->backlight_timeout = NULL;
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lcd_backlight(dev, 0);
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dev->event_callback(dev, LCD_EVENT_BACKLIGHT, dev->event_privdata);
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return -1; /* singleshot */
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}
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@ -189,10 +219,12 @@ int lcd_trigger_backlight(struct lcddev *dev, int timeout)
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dev->backlight_timeout = NULL;
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}
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int retval = lcd_backlight(dev, 1);
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int retval = lcd_backlight(dev, (timeout == 0) ? 0 : 1);
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if (timeout != -1) {
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struct timeval tv = { .tv_sec = timeout };
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dev->backlight_timeout = event_add_timeout(&tv, lcd_backlight_timeout_cb, dev);
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}
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return retval;
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}
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@ -205,7 +237,6 @@ static int lcd_read_cb(int fd, void *privdata)
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int size = (dev->state != LCD_STATE_INITIALIZING) ? sizeof(buf) : 2;
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int len = lcd_read(dev, buf, size);
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int retval = 0;
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if (dev->state == LCD_STATE_INITIALIZING) {
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char expect[] = A125_EVENT_ACTINFO;
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@ -219,7 +250,7 @@ static int lcd_read_cb(int fd, void *privdata)
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dev->state = LCD_STATE_READY;
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/* trigger application to set data */
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retval = dev->button_cb(dev, LCD_BUTTON0, dev->privdata);
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dev->event_callback(dev, LCD_EVENT_INIT, dev->event_privdata);
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}
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} else if (dev->state == LCD_STATE_READY) {
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@ -230,57 +261,95 @@ static int lcd_read_cb(int fd, void *privdata)
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return 0;
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if (memcmp(buf, expect1, sizeof(buf)) == 0) {
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retval = dev->button_cb(dev, LCD_BUTTON1, dev->privdata);
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dev->event_callback(dev, LCD_EVENT_BUTTON1, dev->event_privdata);
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} else if (memcmp(buf, expect2, sizeof(buf)) == 0) {
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retval = dev->button_cb(dev, LCD_BUTTON2, dev->privdata);
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dev->event_callback(dev, LCD_EVENT_BUTTON2, dev->event_privdata);
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}
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}
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if (retval)
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lcd_trigger_backlight(dev, dev->backlight_time);
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return 0;
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}
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static int lcd_setline(struct lcddev *dev, int line, const char *buf)
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static int lcd_setline(struct lcddev *dev, int line, int len, const char *buf)
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{
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if (dev->state != LCD_STATE_READY)
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return -1;
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char cmd[20] = A125_CMD_SETLINE;
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char cmd[20 +1] = A125_CMD_SETLINE;
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cmd[2] = line;
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memset(cmd +4, ' ', 16);
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int len = strlen(buf);
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memcpy(cmd +4, buf, (len > 16) ? 16 : len);
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cmd[20] = '\0';
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lcd_write(dev, cmd, sizeof(cmd));
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#if (_LCD_DEBUG > 0)
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fprintf(stderr, "lcd_setline(%d, '%-16s')\n", line, cmd +4);
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#endif
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lcd_write(dev, cmd, 20);
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return 0;
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}
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static int lcd_scroll_timeout_cb(void *privdata)
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{
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// TODO: scrolling
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struct lcddev *dev = (struct lcddev *)privdata;
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int i, reset_pos = 0;
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return 0; /* periodic */
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for (i = 0; i < 2; i++) {
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int line_pos = dev->scroll_pos;
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if (line_pos < 0)
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line_pos = 0;
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/* mark line as complete if one space is visible after message */
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if ((dev->line_length[i] - line_pos) <= 15) {
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reset_pos++;
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}
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/* do not scroll further if message is not visible */
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if ((dev->line_length[i] - line_pos) < 0) {
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line_pos = dev->line_length[i];
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}
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lcd_setline(dev, i, dev->line_length[i] - line_pos, dev->line_data[i] + line_pos);
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}
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dev->scroll_pos++;
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if (reset_pos == 2)
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dev->scroll_pos = -1;
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/* disable scrolling if backlight is off (display is not visible) */
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if (dev->backlight_state == 0) {
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dev->scroll_timeout = NULL;
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return -1;
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}
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/* periodic */
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return 0;
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}
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int lcd_setlines(struct lcddev *dev, int scrollspeed, const char *line1, const char *line2)
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int lcd_setlines(struct lcddev *dev, int scroll_speed, const char *line1, const char *line2)
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{
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dev->line_data[0] = line1;
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lcd_setline(dev, 0, line1);
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dev->line_length[0] = (line1 != NULL) ? strlen(line1) : 0;
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lcd_setline(dev, 0, dev->line_length[0], dev->line_data[0]);
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dev->line_data[1] = line2;
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lcd_setline(dev, 1, line2);
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dev->line_length[1] = (line2 != NULL) ? strlen(line2) : 0;
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lcd_setline(dev, 1, dev->line_length[1], dev->line_data[1]);
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if (dev->scroll_timeout) {
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int scroll_enable = (dev->line_length[0] > 16 && dev->line_length[1] > 16);
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if (dev->scroll_timeout && ((dev->scroll_speed != scroll_speed) || !scroll_enable)) {
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event_remove_timeout(dev->scroll_timeout);
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dev->scroll_timeout = NULL;
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}
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if (scrollspeed) {
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struct timeval tv = { .tv_usec = scrollspeed };
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dev->scroll_speed = scroll_speed;
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dev->scroll_pos = 0;
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if ((dev->scroll_timeout == NULL) && scroll_enable && (scroll_speed > 0)) {
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struct timeval tv = { .tv_usec = 1000 * dev->scroll_speed };
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dev->scroll_timeout = event_add_timeout(&tv, lcd_scroll_timeout_cb, dev);
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}
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@ -288,9 +357,8 @@ int lcd_setlines(struct lcddev *dev, int scrollspeed, const char *line1, const c
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}
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struct lcddev * lcd_init(const char *devicename,
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int backlight_time,
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int (*button_cb)(struct lcddev *dev, int button, void *privdata),
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void *privdata)
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int (*event_callback)(struct lcddev *dev, int button, void *privdata),
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void *event_privdata)
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{
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struct lcddev *dev = malloc(sizeof(struct lcddev));
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if (dev == NULL) {
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@ -305,9 +373,8 @@ struct lcddev * lcd_init(const char *devicename,
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return NULL;
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}
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dev->backlight_time = backlight_time;
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dev->button_cb = button_cb;
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dev->privdata = privdata;
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dev->event_callback = event_callback;
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dev->event_privdata = event_privdata;
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dev->read_event = event_add_readfd(NULL, dev->fd, lcd_read_cb, dev);
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15
lcd.h
15
lcd.h
@ -1,20 +1,23 @@
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#ifndef _LCD_H_
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#define _LCD_H_
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#define LCD_BUTTON0 0x00
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#define LCD_BUTTON1 0x01
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#define LCD_BUTTON2 0x02
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#define LCD_EVENT_INIT 0x00
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#define LCD_EVENT_BUTTON1 0x01
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#define LCD_EVENT_BUTTON2 0x02
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#define LCD_EVENT_BACKLIGHT 0x04
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struct lcddev; /* private data */
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struct lcddev * lcd_init(const char *device,
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int backlight_timeout,
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int (*button_callback)(struct lcddev *dev, int button, void *privdata),
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void *privdata);
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int (*event_callback)(struct lcddev *dev, int event, void *privdata),
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void *event_privdata);
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void lcd_close(struct lcddev *dev);
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void lcd_reset(struct lcddev *dev);
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#define LCD_BACKLIGHT_OFF (0)
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#define LCD_BACKLIGHT_ON (-1)
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int lcd_trigger_backlight(struct lcddev *dev, int timeout);
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int lcd_setlines(struct lcddev *dev, int scrollspeed, const char *line1, const char *line2);
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15
qnaplcd.c
15
qnaplcd.c
@ -54,15 +54,19 @@ static int page;
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static int button_callback(struct lcddev *dev, int button, void *privdata)
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{
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if (button == LCD_BUTTON2)
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if (button == LCD_EVENT_BUTTON2) {
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page = (page < PAGE_MAX) ? page +1 : 0;
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else if (button == LCD_BUTTON1)
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} else if (button == LCD_EVENT_BUTTON1) {
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page = (page > 0) ? page -1 : PAGE_MAX;
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} else if (button == LCD_EVENT_BACKLIGHT) {
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return 0;
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}
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switch (page) {
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case 0:
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lcd_setlines(dev, 0, "Debian 5.0 Lenny", "2.6.34-kirkwood");
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lcd_setlines(dev, 500, "Debian GNU/Linux 5.0", "Linux 2.6.32.27-486 i586");
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break;
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case 1:
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lcd_setlines(dev, 0, "Hostname:", "storenix.lan");
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@ -87,7 +91,8 @@ static int button_callback(struct lcddev *dev, int button, void *privdata)
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break;
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}
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return 0;
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lcd_trigger_backlight(dev, LCD_TIMEOUT);
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return 1;
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}
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static int restart_var;
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@ -181,7 +186,7 @@ int main(int argc, char *argv[])
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log_print(LOG_EVERYTIME, "qnaplcd started (pid:%d)", getpid());
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while (1) {
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struct lcddev *dev = lcd_init(LCD_DEVICE, LCD_TIMEOUT, &button_callback, NULL);
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struct lcddev *dev = lcd_init(LCD_DEVICE, &button_callback, NULL);
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if (dev == NULL)
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break;
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