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Inputd improvements

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- retry reading kb data after interrupt if the first read fails
- poll for data when the key is pressed to detect missed interrupts
- report issues
This commit is contained in:
Ondrej Jirman 2022-02-02 08:38:33 +01:00
parent 2da55b7d62
commit 6bc1736857
1 changed files with 38 additions and 11 deletions
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49
i2c-inputd.c
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@ -42,15 +42,20 @@ int read_kb(int fd, uint8_t data[16])
};
ret = ioctl(fd, I2C_RDWR, &msg);
syscall_error(ret < 0, "I2C_RDWR failed");
if (ret < 0) {
printf("I2C_RDWR failed (%d)\n", errno);
return -1;
}
// for (int i = 0; i < REG_KEYMATRIX_STATE_END - REG_KEYMATRIX_STATE_CRC8 + 1; i++)
// printf("%02hhx", data[i]);
// printf("\n");
uint8_t crc = crc8(data + 1, REG_KEYMATRIX_STATE_END - REG_KEYMATRIX_STATE_CRC8);
if (crc != data[0])
return -1;
if (crc != data[0]) {
printf("Key data CRC8 mismatch\n");
return -2;
}
return ret == 2 ? 0 : -1;
}
@ -125,7 +130,7 @@ void emit_ev(int fd, int type, int code, int val)
void print_bitmap(uint8_t* map)
{
printf("\033[H");
// printf("\033[H");
for (int r = 0; r < 6; r++) {
if (r == 0) {
printf(" C");
@ -313,8 +318,13 @@ int main(int ac, char* av[])
uint8_t buf[4] = {1, 2, 3, 4};
ret = write_kb(fd, buf);
// - we rely on POGO interrupt to get the key updates
// - if any key is pressed, we will in addition poll
// for the current key status every 200ms of no interrupt
// activity
while (1) {
ret = poll(fds, 1, 10000);
ret = poll(fds, 1, pressed_count > 0 ? 200 : 10000);
syscall_error(ret < 0, "poll failed");
if (fds[0].revents & POLLIN) {
@ -322,13 +332,30 @@ int main(int ac, char* av[])
ssize_t len = read(lfd, &ev, sizeof ev);
syscall_error(len != sizeof ev, "Invalid event size");
// read keyboard data
uint8_t buf[16];
ret = read_kb(fd, buf);
if (ret)
continue;
printf("Interrupt received\n");
} else if (ret == 0 && pressed_count > 0) {
printf("Poll\n");
} else {
continue;
}
//print_bitmap(buf + 1);
// read keyboard data
int retries_left = 3;
uint8_t buf[16];
while (retries_left--) {
ret = read_kb(fd, buf);
if (ret) {
continue;
}
}
if (retries_left == 0 && ret) {
printf("Failed to read keyboard data after 3 retries\n");
}
if (ret == 0) {
print_bitmap(buf + 1);
update_keys(buf + 1);
}
}