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#include "pico/stdlib.h"
#include <stdio.h>
#include <stdint.h>
// define the pins used controlling 74HC595
#define DATA_PIN 2
#define CLOCK_PIN 3
#define LATCH_PIN 4
void init_pins(void)
{
gpio_init(DATA_PIN);
gpio_init(CLOCK_PIN);
gpio_init(LATCH_PIN);
gpio_set_dir(DATA_PIN, GPIO_OUT);
gpio_set_dir(CLOCK_PIN, GPIO_OUT);
gpio_set_dir(LATCH_PIN, GPIO_OUT);
printf("pin initialization successful!\n");
}
uint8_t map[9];
// define the order of 74HC595 chain
#define MINUS 0
#define FIRST_PLUS 1
#define SECOND_PLUS 2
#define THIRD_PLUS 3
#define FOURTH_PLUS 4
#define FIFTH_PLUS 5
#define SIXTH_PLUS 6
#define SEVENTH_PLUS 7
#define EIGHTH_PLUS 8
void init_map(void)
{
map[0] = MINUS;
map[1] = FIRST_PLUS;
map[2] = SECOND_PLUS;
map[3] = THIRD_PLUS;
map[4] = FOURTH_PLUS;
map[5] = FIFTH_PLUS;
map[6] = SIXTH_PLUS;
map[7] = SEVENTH_PLUS;
map[8] = EIGHTH_PLUS;
}
void send_raw_data(uint8_t data[9])
{
gpio_put(LATCH_PIN, 0);
for (size_t i = 0; i < 9; i++) {
for (size_t j = 0; j < 8; j++)
{
gpio_put(DATA_PIN, data[map[i]] & (1 << j));
gpio_put(CLOCK_PIN, 0);
gpio_put(CLOCK_PIN, 1);
}
}
gpio_put(LATCH_PIN, 1);
}
void send_data(uint8_t floor, uint64_t on_floor)
{
uint8_t data[9];
data[0] = floor;
for (size_t i = 0; i < 8; i++) {
data[i] = (on_floor >> (8 * i)) & 0xFF;
}
send_raw_data(data);
}
void draw(uint64_t data[8])
{
for (size_t i = 0; i < 8; i++) {
send_data((1 << i), data[i]);
}
}
void test(void)
{
for (size_t i = 0; i < 8; i++) {
send_data((1 << i), 0xFFFFFFFFFFFFFFFF);
sleep_ms(200);
}
}
void test_every_pin(void)
{
uint64_t data[8];
for (size_t x = 0; x < 8; x++) {
for (size_t y = 0; y < 8; y++) {
for (size_t z = 0; z < 8; z++) {
data[z] = 1 << (y * 8 + x);
draw(data);
data[z] = 0;
sleep_ms(20);
}
}
}
}
int main()
{
init_pins();
init_map();
while(1) {
test();
test_every_pin();
}
return 0;
}
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