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#include "pb.h"
#include "pb.h"
#include "pb-types.h"
#include "pb-mod.h"
#include "pb-send.h"
#include "pb-buf.h"
#include <hardware/i2c.h>
#include <hardware/gpio.h>
#include <pico/i2c_slave.h>
#define PB_I2C_S i2c0
#define PB_I2C_M i2c1
#define BUF_SIZE 256
uint8_t i2c_msg_buf[BUF_SIZE];
size_t i2c_msg_buf_sz = 0;
// This function is called from the I2C ISR
static void recv_event(i2c_inst_t *i2c, i2c_slave_event_t event) {
switch (event) {
case I2C_SLAVE_RECEIVE: {
if (i2c_msg_buf_sz == BUF_SIZE) return;
i2c_msg_buf[i2c_msg_buf_sz++] = i2c_read_byte_raw(PB_I2C_S);
break;
}
case I2C_SLAVE_FINISH: {
pb_i2c_recv(i2c_msg_buf, i2c_msg_buf_sz);
i2c_msg_buf_sz = 0;
break;
}
default: break;
}
}
void pb_setup() {
i2c_init(PB_I2C_S, PB_CLOCK_SPEED_HZ);
i2c_init(PB_I2C_M, PB_CLOCK_SPEED_HZ);
i2c_slave_init(PB_I2C_S, PB_MOD_ADDR, &recv_event);
}
__weak void pb_i2c_send(i2c_addr_t addr, const uint8_t * buf, size_t sz) {
pb_hook_i2c_send(addr, buf, sz);
// false to write stop condition to i2c bus
i2c_write_timeout_us(PB_I2C_M, addr, buf, sz, false, PB_TIMEOUT_US);
}
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