MBOX_CMD_ACK
case MBOX_CMD_ACK:
if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) {
rsp.cmd = MBOX_CMD_ACK;
rsp.cmd = MBOX_CMD_ACK;
rsp.cmd = MBOX_CMD_ACK;
rsp.cmd = MBOX_CMD_ACK;
rsp.cmd = MBOX_CMD_ACK;
rsp.cmd = MBOX_CMD_ACK;
const char *cmd = (rsp.cmd == MBOX_CMD_ACK) ? "ACK" : "NAK";