THS7303_CHANNEL_1
err = ths7303_write(sd, THS7303_CHANNEL_1, val);
ths7303_write(sd, THS7303_CHANNEL_1,
(ths7303_read(sd, THS7303_CHANNEL_1) & 0xf8) |
ths7303_log_channel_status(sd, THS7303_CHANNEL_1);