FreeCalypso > hg > freecalypso-tools

annotate target-utils/helloapp/mygetchar.c @ 495:06ad5e30e8d0

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target-utils: wait_ARM_cycles() changed to 4 cycles per loop
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 25 May 2019 18:51:19 +0000
parents e7502631a0f9
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * The interactive command entry (editing) function in libcommon
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Mychaela Falconia <falcon@freecalypso.org>
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3 * will call mygetchar() for its character input. It is supposed
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Mychaela Falconia <falcon@freecalypso.org>
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4 * to be a blocking wait for input, but in some programs other
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5 * processing can be done while waiting - for example, check for
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6 * keypad presses as well. This is the basic version which waits
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7 * for serial input and nothing else.
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8 */
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10 extern int serial_in_poll();
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12 int
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13 mygetchar()
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14 {
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15 register int c;
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17 do
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18 c = serial_in_poll();
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19 while (c < 0);
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20 return c;
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21 }