FreeCalypso > hg > freecalypso-tools
annotate target-utils/lunadrv/sleep.c @ 868:f6c379f0cbbe
ringtools/examples: move the old BU "melodies" into old subdir
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 28 Mar 2022 05:53:58 +0000 |
parents | 57f7db8c4f45 |
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849
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lunadrv: add suspend and resume commands
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1 /* |
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2 * This module implements suspend and resume commands for entering |
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3 * and exiting ILI9225G sleep mode. These commands are expected |
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4 * to work the same on both HaoRan and Formike LCDs, but the |
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5 * current measurement resistor that allows one to see the actual |
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6 * power supply current drawn by the LCD is present only on lunalcd2 |
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7 * boards. |
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8 */ |
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9 |
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10 #include "types.h" |
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11 #include "luna.h" |
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12 |
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13 void |
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14 cmd_suspend() |
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15 { |
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16 LCD_REG_WR(0x0007, 0); /* display off */ |
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17 wait_ARM_cycles(DELAY_1MS * 50); |
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18 LCD_REG_WR(0x0010, 1); /* suspend mode */ |
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19 } |
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20 |
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21 void |
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22 cmd_resume() |
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23 { |
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24 LCD_REG_WR(0x0010, 0); /* out of suspend */ |
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25 wait_ARM_cycles(DELAY_1MS * 50); |
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26 LCD_REG_WR(0x0007, 0x1017); /* display on */ |
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27 } |
865
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28 |
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29 /* |
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30 * If we wish to run sans-UI firmware on an LCD-equipped board, |
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31 * we would like to put the ILI9225G controller into its lowest |
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32 * power mode, without doing anything else to it. The following |
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33 * reset-suspend command prototypes this functionality. |
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34 */ |
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35 |
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36 void |
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37 cmd_reset_suspend() |
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38 { |
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39 /* reset pulse */ |
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40 CNTL_RST_REG |= EXT_RESET; |
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41 wait_ARM_cycles(DELAY_1MS * 10); |
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42 CNTL_RST_REG &= ~EXT_RESET; |
57f7db8c4f45
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43 /* datasheet says it needs 50 ms */ |
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44 wait_ARM_cycles(DELAY_1MS * 50); |
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45 /* and straight into suspend mode */ |
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46 LCD_REG_WR(0x0010, 1); |
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47 } |