47 lines
1004 B
C
47 lines
1004 B
C
#include <kernel/drivers/keyboard.h>
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#include <kernel/hardware/keysc.h>
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#include <kernel/hardware/intc.h>
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// Device internal indicator to
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// avoid reentrace with the key list.
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volatile uint8_t keylist_isUpdate = 0;
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void sh7305_keysc_int_handler(void)
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{
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static uint8_t key_frame = 0;
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int column;
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int row;
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// Block / disable KEYSC interrupt.
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SH7305_INTC.IMR5.KEYI = 1;
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SH7305_INTC.IPRF.KEYSC = 0;
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// Update key frame.
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key_frame = key_frame + 1;
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// Scan the keyboard.
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row = 6;
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while (--row >= 0)
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{
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column = 16;
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while (--column >= 0)
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{
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if (SH7305_KEYSC.KIUDATA[row] & (0x8000 >> column))
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keycache_update(row, column, key_frame);
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}
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}
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// Clean key cache (remove unpressed key)
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keycache_clean(key_frame);
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// Indicate that the key list has been udpated.
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keylist_isUpdate = 1;
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// Clear KEYSC interrupt, really.
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SH7305_KEYSC.INTERRUPT.WORD = SH7305_KEYSC.INTERRUPT.WORD;
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// Unblock / enable KEYSC interrupt.
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SH7305_INTC.IPRF.KEYSC = 15;
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SH7305_INTC.IMCR5.KEYI = 1;
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}
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