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annotate target-utils/lunadrv/backlight.c @ 831:2f401860e9ad

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documentation update for buzzer melodies
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 31 May 2021 04:24:22 +0000
parents db9a8e88e63f
children
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700
db9a8e88e63f target-utils lunadrv program written, compiles
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1 #include <sys/types.h>
db9a8e88e63f target-utils lunadrv program written, compiles
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2 #include <strings.h>
db9a8e88e63f target-utils lunadrv program written, compiles
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3 #include "types.h"
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4
db9a8e88e63f target-utils lunadrv program written, compiles
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5 #define GPIO_OUT_REG (*(volatile u16 *) 0xfffe4802)
db9a8e88e63f target-utils lunadrv program written, compiles
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6 #define BACKLIGHT_GPIO_MASK 0x0200
db9a8e88e63f target-utils lunadrv program written, compiles
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7
db9a8e88e63f target-utils lunadrv program written, compiles
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8 void
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9 cmd_dbl(argbulk)
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10 char *argbulk;
db9a8e88e63f target-utils lunadrv program written, compiles
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11 {
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12 char *argv[2];
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13
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14 if (parse_args(argbulk, 1, 1, argv, 0) < 0)
db9a8e88e63f target-utils lunadrv program written, compiles
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15 return;
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16 if (!strcmp(argv[0], "on"))
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17 GPIO_OUT_REG |= BACKLIGHT_GPIO_MASK;
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18 else if (!strcmp(argv[0], "off"))
db9a8e88e63f target-utils lunadrv program written, compiles
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19 GPIO_OUT_REG &= ~BACKLIGHT_GPIO_MASK;
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20 else
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21 printf("ERROR: \"on\" or \"off\" argument expected\n");
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22 }