output character/string to LCD
Stefan Schuermans commited on 2012-02-12 20:46:27
Showing 2 changed files, with 45 additions and 12 deletions.
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@@ -37,7 +37,6 @@ void lcd_set_rs(unsigned char state) |
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*/ |
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void lcd_set_rw(unsigned char state) |
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{
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- volatile unsigned char *p_lcd_rw = (volatile unsigned char *)0x80000103; |
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lcd_ptr[3] = state; |
| 42 | 41 |
} |
| 43 | 42 |
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@@ -100,17 +99,36 @@ void lcd_init(void) |
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lcd_byte(0, 0x0C); |
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lcd_byte(0, 0x01); |
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cyc_cnt_delay_us(1640); |
| 103 |
- lcd_byte(1, 'H'); |
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- lcd_byte(1, 'e'); |
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- lcd_byte(1, 'l'); |
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- lcd_byte(1, 'l'); |
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- lcd_byte(1, 'o'); |
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+} |
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+ |
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+/** |
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+ * @brief show character |
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+ * @param[in] line number of line (0..1) |
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+ * @param[in] pos position in line (0..15) |
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+ * @param[in] chr character to set |
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+ */ |
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+void lcd_chr(unsigned int line, unsigned int pos, char chr) |
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+{
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+ if (line > 1 || pos > 15) |
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+ return; |
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+ lcd_byte(0, 0x80 | line << 6 | pos); |
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+ lcd_byte(1, chr); |
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+} |
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+ |
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+/** |
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+ * @brief show string |
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+ * @param[in] line number of line (0..1) |
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+ * @param[in] str string to show |
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+ */ |
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+void lcd_str(unsigned int line, const char *str) |
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+{
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+ if (line > 1) |
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+ return; |
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+ lcd_byte(0, 0x80 | line << 6); |
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+ unsigned int cnt; |
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+ for (cnt = 0; cnt < 16 && str[cnt] != 0; ++cnt) |
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+ lcd_byte(1, str[cnt]); |
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+ for (; cnt < 16; ++cnt) |
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| 108 | 132 |
lcd_byte(1, ' '); |
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- lcd_byte(1, 'W'); |
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- lcd_byte(1, 'o'); |
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- lcd_byte(1, 'r'); |
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- lcd_byte(1, 'l'); |
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- lcd_byte(1, 'd'); |
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- lcd_byte(1, '!'); |
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} |
| 116 | 134 |
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| ... | ... |
@@ -38,5 +38,20 @@ void lcd_byte(unsigned char data, unsigned char byte); |
| 38 | 38 |
/** initialize LCD */ |
| 39 | 39 |
void lcd_init(void); |
| 40 | 40 |
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+/** |
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+ * @brief show character |
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+ * @param[in] line number of line (0..1) |
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+ * @param[in] pos position in line (0..15) |
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+ * @param[in] chr character to set |
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+ */ |
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+void lcd_chr(unsigned int line, unsigned int pos, char chr); |
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+ |
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+/** |
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+ * @brief show string |
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+ * @param[in] line number of line (0..1) |
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+ * @param[in] str string to show |
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+ */ |
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+void lcd_str(unsigned int line, const char *str); |
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+ |
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#endif /* #ifndef LCD_H */ |
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|
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