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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | mjames | 1 | #include "libCharLCD/lcd.h" |
| 2 | |||
| 3 | namespace |
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| 4 | { |
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| 5 | unsigned const LCD_BUSY_FLAG = 0x80; |
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| 6 | unsigned const LCD_INIT_SEQ = 0x30; // initialise |
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| 7 | unsigned const LCD_DISP_CLEAR = 0x01; |
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| 8 | unsigned const LCD_DISP_OFF = 0x08; |
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| 9 | unsigned const LCD_DISP_ON = 0x0C; |
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| 10 | unsigned const LCD_CURSOR_ON = 0x0E; |
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| 11 | unsigned const LCD_CURSOR_OFF = 0x0C; |
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| 12 | unsigned const LCD_CURSOR_BLINK = 0x0F; |
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| 13 | unsigned const LCD_RETURN_HOME = 0x02; |
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| 14 | unsigned const LCD_ENTRY_MODE = 0x06; |
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| 15 | unsigned const LCD_4BIT_MODE = 0x20; |
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| 16 | unsigned const LCD_8BIT_MODE = 0x30; |
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| 17 | unsigned const LCD_1_ROWS = 0x00; |
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| 18 | unsigned const LCD_2_ROWS = 0x08; |
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| 19 | unsigned const LCD_FONT_5x8 = 0x00; |
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| 20 | unsigned const LCD_FONT_5x10 = 0x04; |
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| 21 | unsigned const LCD_POSITION = 0x80; |
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| 22 | unsigned const LCD_CG = 0x40; |
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| 23 | |||
| 24 | unsigned const LCD_SHIFT = 0x10; |
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| 25 | unsigned const LCD_CURSOR = 0x00; |
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| 26 | unsigned const LCD_DISPLAY = 0x08; |
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| 27 | unsigned const LCD_LEFT = 0x00; |
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| 28 | unsigned const LCD_RIGHT = 0x04; |
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| 29 | |||
| 30 | unsigned const LCD_ROW1_START = 0x00; |
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| 31 | unsigned const LCD_ROW2_START = 0x40; |
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| 32 | } // namespace |
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| 33 | |||
| 34 | // initialise the display |
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| 35 | void lcd_t::init() |
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| 36 | { |
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| 37 | // initialise low level code now ChibiOS is running |
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| 38 | m_lcd.init(); |
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| 39 | |||
| 40 | m_lcd.writeCtrl4(LCD_INIT_SEQ); |
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| 41 | |||
| 42 | HAL_Delay(5); // > 4.1ms |
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| 43 | m_lcd.writeCtrl4(LCD_INIT_SEQ); |
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| 44 | |||
| 45 | HAL_Delay(5); |
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| 46 | m_lcd.writeCtrlWait(LCD_4BIT_MODE | LCD_2_ROWS | LCD_FONT_5x8); |
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| 47 | |||
| 48 | HAL_Delay(5); |
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| 49 | |||
| 50 | m_lcd.writeCtrlWait(LCD_4BIT_MODE | LCD_2_ROWS | LCD_FONT_5x8); |
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| 51 | |||
| 52 | m_lcd.writeCtrlWait(LCD_DISP_OFF); |
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| 53 | |||
| 54 | m_lcd.writeCtrlWait(LCD_DISP_CLEAR); |
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| 55 | |||
| 56 | m_lcd.writeCtrlWait(LCD_ENTRY_MODE); |
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| 57 | } |
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| 58 | |||
| 59 | /// \brief clear the display |
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| 60 | void lcd_t::clear() |
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| 61 | { |
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| 62 | m_lcd.writeCtrlWait(LCD_DISP_CLEAR); |
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| 63 | } |
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| 64 | |||
| 65 | void lcd_t::enable(bool ena_) |
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| 66 | { |
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| 67 | m_lcd.writeCtrlWait(ena_ ? LCD_DISP_ON : LCD_DISP_OFF); |
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| 68 | } |
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| 69 | |||
| 70 | void lcd_t::gotoxy(uint8_t x_, uint8_t y_) |
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| 71 | { |
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| 72 | if (y_ >= displayYsize()) |
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| 73 | return; |
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| 74 | if (x_ >= displayXsize()) |
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| 75 | return; |
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| 76 | uint8_t row = (y_ == 1) ? LCD_ROW2_START : LCD_ROW1_START; |
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| 77 | |||
| 78 | // x_ is already constrained |
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| 79 | m_lcd.writeCtrlWait(LCD_POSITION | row | x_); |
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| 80 | } |
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| 81 | |||
| 82 | void lcd_t::printString(char *str_, uint8_t count_) |
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| 83 | { |
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| 84 | printString(const_cast<char const *>(str_),count_); |
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| 85 | } |
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| 86 | |||
| 87 | void lcd_t::printString(char const *str_, uint8_t count_) |
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| 88 | { |
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| 89 | // if passed a null terminated string and a count less than display X size |
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| 90 | if (count_ > displayXsize()) |
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| 91 | { |
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| 92 | count_ = displayXsize(); |
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| 93 | while (*str_ && count_--) |
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| 94 | m_lcd.writeData(*str_++); |
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| 95 | return; |
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| 96 | } |
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| 97 | else |
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| 98 | { |
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| 99 | while (count_--) |
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| 100 | m_lcd.writeData(*str_++); |
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| 101 | } |
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| 102 | } |
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| 103 | |||
| 104 | uint8_t lcd_t::format_num(char *buff, uint8_t digits, uint8_t dp_pos, int val) |
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| 105 | { |
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| 106 | digits++; |
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| 107 | uint8_t pos = digits; |
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| 108 | uint8_t dp_loc = pos - dp_pos; |
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| 109 | uint8_t sign = 0; |
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| 110 | if (val < 0) |
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| 111 | { |
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| 112 | sign = 1; |
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| 113 | val = -val; |
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| 114 | } |
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| 115 | |||
| 116 | buff[pos] = 0; |
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| 117 | while (pos) |
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| 118 | { |
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| 119 | if (pos == dp_loc) |
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| 120 | { |
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| 121 | buff[--pos] = '.'; |
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| 122 | } |
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| 123 | else |
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| 124 | { |
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| 125 | buff[--pos] = val % 10 + '0'; |
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| 126 | val /= 10; |
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| 127 | if (val == 0 && pos < dp_loc) |
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| 128 | break; |
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| 129 | } |
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| 130 | } |
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| 131 | if (sign) |
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| 132 | { |
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| 133 | buff[--pos] = '-'; |
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| 134 | } |
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| 135 | return digits; |
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| 136 | } |
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| 137 | |||
| 138 | void lcd_t::font_digits(uint8_t digits, uint8_t dp_pos, int val) |
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| 139 | { |
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| 140 | char buff[10] = " "; |
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| 141 | format_num(buff, digits, dp_pos, val); |
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| 142 | printString(buff); |
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| 143 | } |
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| 144 | |||
| 145 | void lcd_t::defineChar(uint8_t code, uint8_t* rows) |
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| 146 | { |
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| 147 | defineChar(code, const_cast<uint8_t const *>(rows)); |
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| 148 | } |
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| 149 | |||
| 150 | |||
| 151 | void lcd_t::defineChar(uint8_t code, uint8_t const * rows) |
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| 152 | { |
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| 153 | uint8_t addr = (code & 0x7)* 8; |
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| 154 | m_lcd.writeCtrlWait(LCD_CG | (addr &0x3F) ); |
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| 155 | for (int i = 0; i < 8; i++) |
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| 156 | m_lcd.writeData(rows[i] & 0x1f); |
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| 157 | } |