94 lines
2.9 KiB
C
Executable File
94 lines
2.9 KiB
C
Executable File
/*
|
|
* probe.c -- I2C Bus Hardware Scanner module
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*
|
|
* I2C bus scanner. Probes /dev/i2c-0 address space 0x03-0x77
|
|
* using SMBus receive-byte probe. Displays responding devices
|
|
* in an LVGL list with green highlighting.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <linux/i2c-dev.h>
|
|
#include <linux/input.h>
|
|
#include "h2_ui.h"
|
|
#include "log_manager.h"
|
|
|
|
#define I2C_DEV "/dev/i2c-0"
|
|
#define ADDR_START 0x03
|
|
#define ADDR_END 0x77
|
|
#define MAX_FOUND 16
|
|
|
|
static int i2c_fd = -1;
|
|
|
|
static int try_probe_addr(uint8_t addr) {
|
|
if (ioctl(i2c_fd, I2C_SLAVE, addr) < 0) return 0;
|
|
unsigned char dummy;
|
|
return (read(i2c_fd, &dummy, 1) == 1);
|
|
}
|
|
|
|
int main(void) {
|
|
init_h2_graphics_runtime("I2C CONTROLLER SCANNER");
|
|
LOG_INF("probe module started");
|
|
|
|
lv_obj_t *scr = lv_scr_act();
|
|
|
|
lv_obj_t *title = lv_label_create(scr);
|
|
lv_label_set_text(title, "I2C BUS HARDWARE SCAN");
|
|
lv_obj_align(title, LV_ALIGN_TOP_MID, 0, 10);
|
|
lv_obj_set_style_text_color(title, COLOR_PRIMARY, LV_PART_MAIN);
|
|
|
|
lv_obj_t *list = lv_list_create(scr);
|
|
lv_obj_set_size(list, 280, 160);
|
|
lv_obj_align(list, LV_ALIGN_CENTER, 0, 15);
|
|
|
|
uint8_t found_addrs[MAX_FOUND];
|
|
int found_count = 0;
|
|
|
|
i2c_fd = open(I2C_DEV, O_RDWR);
|
|
if (i2c_fd < 0) {
|
|
lv_list_add_text(list, "ERROR: Cannot open /dev/i2c-0");
|
|
LOG_ERR("cannot open %s", I2C_DEV);
|
|
} else {
|
|
lv_list_add_text(list, "Probing 0x03 - 0x77 ...");
|
|
LOG_INF("scanning I2C bus 0x03-0x77");
|
|
|
|
for (int addr = ADDR_START; addr <= ADDR_END; addr++) {
|
|
if (try_probe_addr((uint8_t)addr) && found_count < MAX_FOUND) {
|
|
found_addrs[found_count++] = (uint8_t)addr;
|
|
}
|
|
}
|
|
|
|
if (found_count == 0) {
|
|
lv_list_add_text(list, "No devices responded.");
|
|
}
|
|
char buf[64];
|
|
for (int i = 0; i < found_count; i++) {
|
|
snprintf(buf, sizeof(buf), " [0x%02X] ACK", found_addrs[i]);
|
|
lv_obj_t *entry = lv_list_add_text(list, buf);
|
|
lv_obj_set_style_text_color(entry, COLOR_ACCENT, LV_PART_MAIN);
|
|
}
|
|
snprintf(buf, sizeof(buf), "Scan complete: %d device(s)", found_count);
|
|
lv_list_add_text(list, buf);
|
|
LOG_INF("I2C scan found %d device(s)", found_count);
|
|
close(i2c_fd);
|
|
i2c_fd = -1;
|
|
}
|
|
|
|
int input_fd = open("/dev/input/event0", O_RDONLY | O_NONBLOCK);
|
|
struct input_event ev;
|
|
while (1) {
|
|
lv_timer_handler();
|
|
if (input_fd >= 0 && read(input_fd, &ev, sizeof(struct input_event)) > 0) {
|
|
if (ev.type == EV_KEY && ev.code == H2_KEY_BACK && ev.value == 1) break;
|
|
}
|
|
usleep(20000);
|
|
}
|
|
if (input_fd >= 0) close(input_fd);
|
|
LOG_INF("probe module exited");
|
|
return 0;
|
|
} |