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pppos-client: support for SIM7600 modem

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Reuses most of the code from BG96. At this moment, this is not a
perfect support for other modules as the generic handlers for most
common modem functionality is not easily reusable. Refactoring to a
fully independent modem component will solve this.

Closes https://github.com/espressif/esp-idf/issues/5250
This commit is contained in:
David Cermak
2020-06-24 12:02:13 +02:00
committed by bot
parent 6edf0fed2b
commit c226270138
9 changed files with 188 additions and 24 deletions
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90
examples/protocols/pppos_client/components/modem/src/sim7600.c Normal file
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// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdlib.h>
#include <string.h>
#include "esp_log.h"
#include "bg96.h"
#include "bg96_private.h"
/**
* @brief This module supports SIM7600 module, which has a very similar interface
* to the BG96, so it just references most of the handlers from BG96 and implements
* only those that differ.
*/
static const char *DCE_TAG = "sim7600";
/**
* @brief Handle response from AT+CBC
*/
static esp_err_t sim7600_handle_cbc(modem_dce_t *dce, const char *line)
{
esp_err_t err = ESP_FAIL;
bg96_modem_dce_t *bg96_dce = __containerof(dce, bg96_modem_dce_t, parent);
if (strstr(line, MODEM_RESULT_CODE_SUCCESS)) {
err = esp_modem_process_command_done(dce, MODEM_STATE_SUCCESS);
} else if (strstr(line, MODEM_RESULT_CODE_ERROR)) {
err = esp_modem_process_command_done(dce, MODEM_STATE_FAIL);
} else if (!strncmp(line, "+CBC", strlen("+CBC"))) {
/* store value of bcs, bcl, voltage */
int32_t **cbc = bg96_dce->priv_resource;
int32_t volts = 0, fraction = 0;
/* +CBC: <voltage in Volts> V*/
sscanf(line, "+CBC: %d.%dV", &volts, &fraction);
/* Since the "read_battery_status()" API (besides voltage) returns also values for BCS, BCL (charge status),
* which are not applicable to this modem, we return -1 to indicate invalid value
*/
*cbc[0] = -1; // BCS
*cbc[1] = -1; // BCL
*cbc[2] = volts*1000 + fraction;
err = ESP_OK;
}
return err;
}
/**
* @brief Get battery status
*
* @param dce Modem DCE object
* @param bcs Battery charge status
* @param bcl Battery connection level
* @param voltage Battery voltage
* @return esp_err_t
* - ESP_OK on success
* - ESP_FAIL on error
*/
static esp_err_t sim7600_get_battery_status(modem_dce_t *dce, uint32_t *bcs, uint32_t *bcl, uint32_t *voltage)
{
modem_dte_t *dte = dce->dte;
bg96_modem_dce_t *bg96_dce = __containerof(dce, bg96_modem_dce_t, parent);
uint32_t *resource[3] = {bcs, bcl, voltage};
bg96_dce->priv_resource = resource;
dce->handle_line = sim7600_handle_cbc;
DCE_CHECK(dte->send_cmd(dte, "AT+CBC\r", MODEM_COMMAND_TIMEOUT_DEFAULT) == ESP_OK, "send command failed", err);
DCE_CHECK(dce->state == MODEM_STATE_SUCCESS, "inquire battery status failed", err);
ESP_LOGD(DCE_TAG, "inquire battery status ok");
return ESP_OK;
err:
return ESP_FAIL;
}
/**
* @brief Create and initialize SIM7600 object
*
*/
modem_dce_t *sim7600_init(modem_dte_t *dte)
{
modem_dce_t *dce = bg96_init(dte);
dte->dce->get_battery_status = sim7600_get_battery_status;
return dce;
}