90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* Copyright 2023 ArthurCyy <https://github.com/ArthurCyy>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "shift_register.h"
|
|
#include <string.h>
|
|
|
|
static void shift_out(void);
|
|
|
|
static uint8_t shift_values[SHR_SERIES_NUM] = {0};
|
|
|
|
void shift_init(void) {
|
|
#ifdef SHR_OE_PIN
|
|
gpio_set_pin_output(SHR_OE_PIN);
|
|
gpio_write_pin_high(SHR_OE_PIN);
|
|
#endif
|
|
gpio_set_pin_output(SHR_DATA_PIN);
|
|
gpio_set_pin_output(SHR_LATCH_PIN);
|
|
gpio_set_pin_output(SHR_CLOCK_PIN);
|
|
}
|
|
|
|
void shift_enable(void) {
|
|
#ifdef SHR_OE_PIN
|
|
gpio_write_pin_low(SHR_OE_PIN);
|
|
#endif
|
|
gpio_write_pin_low(SHR_DATA_PIN);
|
|
gpio_write_pin_low(SHR_LATCH_PIN);
|
|
gpio_write_pin_low(SHR_CLOCK_PIN);
|
|
}
|
|
|
|
void shift_disable(void) {
|
|
#ifdef SHR_OE_PIN
|
|
gpio_write_pin_high(SHR_OE_PIN);
|
|
#endif
|
|
gpio_write_pin_low(SHR_DATA_PIN);
|
|
gpio_write_pin_low(SHR_LATCH_PIN);
|
|
gpio_write_pin_low(SHR_CLOCK_PIN);
|
|
}
|
|
|
|
void shift_writePin(pin_t pin, int level) {
|
|
uint8_t group = (pin - H0) >> 3;
|
|
uint8_t bit = 0x01 << ((pin - H0)&0x07);
|
|
|
|
if(group >= SHR_SERIES_NUM)
|
|
return;
|
|
|
|
if(level)
|
|
shift_values[group] |= bit;
|
|
else
|
|
shift_values[group] &= ~bit;
|
|
shift_out();
|
|
}
|
|
|
|
void shift_writeGroup(int group, uint8_t value) {
|
|
if(group >= SHR_SERIES_NUM)
|
|
return;
|
|
|
|
shift_values[group] = value;
|
|
shift_out();
|
|
}
|
|
|
|
void shift_writeAll(int level) {
|
|
memset(shift_values, level ? 0xFF : 0, sizeof(shift_values));
|
|
shift_out();
|
|
}
|
|
|
|
static void shift_out(void) {
|
|
uint8_t n = SHR_SERIES_NUM;
|
|
gpio_write_pin_low(SHR_LATCH_PIN);
|
|
while(n--){
|
|
for (uint8_t i = 0; i < 8; i++) {
|
|
gpio_write_pin_low(SHR_CLOCK_PIN);
|
|
gpio_write_pin(SHR_DATA_PIN, shift_values[n] & (0x80 >> i));
|
|
gpio_write_pin_high(SHR_CLOCK_PIN);
|
|
}
|
|
}
|
|
gpio_write_pin_high(SHR_LATCH_PIN);
|
|
}
|