void fm_entry_uart(void)
{
qm_gpio_state_t state;
/*
* qda_init() implicitly initializes the HW required by XMODEM (i.e.,
* UART and PIC timer) and the DFU state machine.
*/
qda_init();
do {
/*
* The following function returns only when no data is received
* for 10 seconds.
*/
qda_receive_loop();
fm_gpio_get_state(&state);
} while (state == QM_GPIO_LOW);
/*
* Cold reboot in order to restore the default system configuration
* (thus getting rid of all the changes done by the FM mode, like the
* UART configuration).
*/
qm_soc_reset(QM_COLD_RESET);
}
/**
* Process QDA packet.
*
* Parse, process, and reply to an incoming QDA packet.
*
* @param[in] data The buffer containing the packet.
* @param[in] len The length of packet or its upper bound (since XMODEM may
* add some padding bytes).
*/
static void qda_process_pkt(uint8_t *data, size_t len)
{
qda_pkt_t *pkt;
qda_dnl_req_payload_t *dnload_req;
qda_upl_req_payload_t *upload_req;
qda_set_alt_setting_payload_t *altset_req;
size_t expected_len;
dfu_dev_state_t state;
dfu_dev_status_t status;
uint32_t poll_timeout;
pkt = (qda_pkt_t *)data;
expected_len = sizeof(*pkt);
switch (pkt->type) {
case QDA_PKT_DEV_DESC_REQ:
qda_dev_dsc_rsp();
break;
case QDA_PKT_DFU_DESC_REQ:
qda_dfu_dsc_rsp();
break;
case QDA_PKT_DFU_SET_ALT_SETTING:
altset_req = (qda_set_alt_setting_payload_t *)pkt->payload;
STALL_AND_BREAK_ON_ERR(
dfu_set_alt_setting(altset_req->alt_setting));
qda_ack();
break;
case QDA_PKT_DFU_DNLOAD_REQ:
dnload_req = (qda_dnl_req_payload_t *)pkt->payload;
expected_len += sizeof(*dnload_req) + dnload_req->data_len;
if ((len < expected_len) ||
dfu_process_dnload(dnload_req->block_num, dnload_req->data,
dnload_req->data_len)) {
qda_stall();
break;
}
qda_ack();
break;
case QDA_PKT_DFU_UPLOAD_REQ:
upload_req = (qda_upl_req_payload_t *)pkt->payload;
/* UPLOAD requests are handled differently from the others in
* order to reuse qda_buf */
handle_upload_req(upload_req);
break;
case QDA_PKT_DFU_GETSTATUS_REQ:
STALL_AND_BREAK_ON_ERR(
dfu_get_status(&status, &state, &poll_timeout));
qda_dfu_get_status_rsp(state, status, poll_timeout);
break;
case QDA_PKT_DFU_CLRSTATUS:
STALL_AND_BREAK_ON_ERR(dfu_clr_status());
qda_ack();
break;
case QDA_PKT_DFU_GETSTATE_REQ:
STALL_AND_BREAK_ON_ERR(dfu_get_state(&state));
qda_dfu_get_state_rsp(state);
break;
case QDA_PKT_DFU_ABORT:
STALL_AND_BREAK_ON_ERR(dfu_abort());
qda_ack();
break;
case QDA_PKT_RESET:
qda_ack();
qm_soc_reset(QM_COLD_RESET);
break;
/* QDA_PKT_DFU_DETACH should not be received */
default:
/* NOTE: how to handle bad QDA requests? Send a QDA_STALL
* message for now */
qda_stall();
break;
}
}