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drivers/lcd/st7032.c: Fix ST7032 scroll issue

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This commit is contained in:
Alan Carvalho de Assis 2018-11-30 18:42:24 -06:00 committed by Gregory Nutt
parent f66fb3ac63
commit bc9094ad27
1 changed files with 20 additions and 7 deletions
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27
drivers/lcd/st7032.c
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@ -83,6 +83,7 @@ struct st7032_dev_s
uint8_t row; /* Current row position to write on display */
uint8_t col; /* Current col position to write on display */
uint8_t buffer[ST7032_MAX_ROW * ST7032_MAX_COL]; /* SLCD ASCII content */
bool pendscroll;
sem_t sem_excl;
};
@ -337,7 +338,8 @@ static inline void lcd_putdata(FAR struct st7032_dev_s *priv, uint8_t data)
if (priv->row >= ST7032_MAX_ROW)
{
priv->row = ST7032_MAX_ROW - 1;
priv->pendscroll = true;
priv->row = ST7032_MAX_ROW - 1;
}
/* Update cursor position */
@ -779,8 +781,17 @@ static ssize_t st7032_write(FAR struct file *filep, FAR const char *buffer,
/* Now decode and process every byte in the input buffer */
memset(&state, 0, sizeof(struct slcdstate_s));
while ((result = slcd_decode(&instream.stream, &state, &ch, &count)) != SLCDRET_EOF)
while ((result = slcd_decode(&instream.stream, &state, &ch, &count)) !=
SLCDRET_EOF)
{
/* Is there some pending scroll? */
if (priv->pendscroll)
{
lcd_scroll_up(priv);
priv->pendscroll = false;
}
if (result == SLCDRET_CHAR) /* A normal character was returned */
{
/* Check for ASCII control characters */
@ -789,8 +800,9 @@ static ssize_t st7032_write(FAR struct file *filep, FAR const char *buffer,
{
/* Blink Cursor? Shouln't it be just 4 spaces to indicate TAB? */
st7032_write_inst(priv, ST7032_DISPLAY_ON_OFF | DISPLAY_ON_OFF_D |
DISPLAY_ON_OFF_C | DISPLAY_ON_OFF_B);
st7032_write_inst(priv, ST7032_DISPLAY_ON_OFF |
DISPLAY_ON_OFF_D | DISPLAY_ON_OFF_C |
DISPLAY_ON_OFF_B);
}
else if (ch == ASCII_VT)
{
@ -1058,9 +1070,10 @@ int st7032_register(FAR const char *devpath, FAR struct i2c_master_s *i2c)
/* Setup priv with initial values */
priv->i2c = i2c;
priv->col = 0;
priv->row = 0;
priv->i2c = i2c;
priv->col = 0;
priv->row = 0;
priv->pendscroll = false;
nxsem_init(&priv->sem_excl, 0, 1);