49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#include <vhex/keyboard.h>
|
|
#include <vhex/drivers/mpu/sh/sh7305/keysc.h>
|
|
#include <vhex/drivers/mpu/sh/sh7305/intc.h>
|
|
|
|
/* Internal indicator used by high-level function to notice when the key list
|
|
is updated */
|
|
volatile uint8_t keylist_isUpdate = 0;
|
|
|
|
/* sh7305_keysc_int_handler() : SH7305 KEYSC interrupt handler */
|
|
void sh7305_keysc_int_handler(void)
|
|
{
|
|
static uint8_t keyframe = 0;
|
|
int intlevel;
|
|
int column;
|
|
int row;
|
|
|
|
/* Block / disable KEYSC interrupt (otherwise the module will crash) */
|
|
SH7305_INTC._MSK->IMR5.KEYSC = 1;
|
|
intlevel = SH7305_INTC._IPRX->IPRF.KEYSC;
|
|
SH7305_INTC._IPRX->IPRF.KEYSC = 0;
|
|
|
|
|
|
/* update the keyframe */
|
|
keyframe = keyframe + 1;
|
|
|
|
/* update the keycache */
|
|
row = 6;
|
|
while (--row >= 0) {
|
|
column = 16;
|
|
while (--column >= 0) {
|
|
if (SH7305_KEYSC.KIUDATA[row] & (0x8000 >> column))
|
|
keycache_update(row, column, keyframe);
|
|
}
|
|
}
|
|
|
|
/* Clean key cache (remove unpressed key) */
|
|
keycache_clean(keyframe);
|
|
|
|
/* Indicate that the key list has been udpated */
|
|
keylist_isUpdate = 1;
|
|
|
|
/* Clear KEYSC interrupt, really */
|
|
SH7305_KEYSC.KIUINTREG.word = SH7305_KEYSC.KIUINTREG.word;
|
|
|
|
/* Unblock / enable KEYSC interrupt. */
|
|
SH7305_INTC._IPRX->IPRF.KEYSC = intlevel;
|
|
SH7305_INTC._MSKCLR->IMR5.KEYSC = 1;
|
|
}
|