/* ------------------------------------------------------------------------- */
void uart_put_char(uint8_t tx)
{
uint8_t i;
/* Start condition */
uart_clr_pin();
uart_bit_dly();
for(i=0;i<8;i++)
{
if(tx & (1<<i))
{
uart_set_pin();
}
else
{
uart_clr_pin();
}
uart_bit_dly();
}
/* Stop condition */
uart_set_pin();
uart_bit_dly();
}
void doGPS() {
ESP_LOGD(tag, ">> doGPS");
uart_config_t myUartConfig;
myUartConfig.baud_rate = 9600;
myUartConfig.data_bits = UART_DATA_8_BITS;
myUartConfig.parity = UART_PARITY_DISABLE;
myUartConfig.stop_bits = UART_STOP_BITS_1;
myUartConfig.flow_ctrl = UART_HW_FLOWCTRL_DISABLE;
myUartConfig.rx_flow_ctrl_thresh = 120;
uart_param_config(UART_NUM_1, &myUartConfig);
uart_set_pin(UART_NUM_1,
UART_PIN_NO_CHANGE, // TX
GPS_TX_PIN, // RX
UART_PIN_NO_CHANGE, // RTS
UART_PIN_NO_CHANGE // CTS
);
uart_driver_install(UART_NUM_1, 2048, 2048, 10, 17, NULL);
while(1) {
char *line = readLine(UART_NUM_1);
//ESP_LOGD(tag, "%s", line);
switch(minmea_sentence_id(line, false)) {
case MINMEA_SENTENCE_RMC:
ESP_LOGD(tag, "Sentence - MINMEA_SENTENCE_RMC");
struct minmea_sentence_rmc frame;
if (minmea_parse_rmc(&frame, line)) {
ESP_LOGD(tag, "$xxRMC: raw coordinates and speed: (%d/%d,%d/%d) %d/%d",
frame.latitude.value, frame.latitude.scale,
frame.longitude.value, frame.longitude.scale,
frame.speed.value, frame.speed.scale);
ESP_LOGD(tag, "$xxRMC fixed-point coordinates and speed scaled to three decimal places: (%d,%d) %d",
minmea_rescale(&frame.latitude, 1000),
minmea_rescale(&frame.longitude, 1000),
minmea_rescale(&frame.speed, 1000));
ESP_LOGD(tag, "$xxRMC floating point degree coordinates and speed: (%f,%f) %f",
minmea_tocoord(&frame.latitude),
minmea_tocoord(&frame.longitude),
minmea_tofloat(&frame.speed));
}
else {
ESP_LOGD(tag, "$xxRMC sentence is not parsed\n");
}
break;
case MINMEA_SENTENCE_GGA:
//ESP_LOGD(tag, "Sentence - MINMEA_SENTENCE_GGA");
break;
case MINMEA_SENTENCE_GSV:
//ESP_LOGD(tag, "Sentence - MINMEA_SENTENCE_GSV");
break;
default:
//ESP_LOGD(tag, "Sentence - other");
break;
}
}
} // doGPS
void init() {
const uart_config_t uart_config = {
.baud_rate = 115200,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.flow_ctrl = UART_HW_FLOWCTRL_DISABLE
};
uart_param_config(UART_NUM_1, &uart_config);
uart_set_pin(UART_NUM_1, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
// We won't use a buffer for sending data.
uart_driver_install(UART_NUM_1, RX_BUF_SIZE * 2, 0, 0, NULL, 0);
}
int sendData(const char* logName, const char* data)
{
const int len = strlen(data);
const int txBytes = uart_write_bytes(UART_NUM_1, data, len);
ESP_LOGI(logName, "Wrote %d bytes", txBytes);
return txBytes;
}
static void tx_task()
{
static const char *TX_TASK_TAG = "TX_TASK";
esp_log_level_set(TX_TASK_TAG, ESP_LOG_INFO);
while (1) {
sendData(TX_TASK_TAG, "Hello world");
vTaskDelay(2000 / portTICK_PERIOD_MS);
}
}
static void rx_task()
{
static const char *RX_TASK_TAG = "RX_TASK";
esp_log_level_set(RX_TASK_TAG, ESP_LOG_INFO);
uint8_t* data = (uint8_t*) malloc(RX_BUF_SIZE+1);
while (1) {
const int rxBytes = uart_read_bytes(UART_NUM_1, data, RX_BUF_SIZE, 1000 / portTICK_RATE_MS);
if (rxBytes > 0) {
data[rxBytes] = 0;
ESP_LOGI(RX_TASK_TAG, "Read %d bytes: '%s'", rxBytes, data);
ESP_LOG_BUFFER_HEXDUMP(RX_TASK_TAG, data, rxBytes, ESP_LOG_INFO);
}
}
free(data);
}
void app_main()
{
init();
xTaskCreate(rx_task, "uart_rx_task", 1024*2, NULL, configMAX_PRIORITIES, NULL);
xTaskCreate(tx_task, "uart_tx_task", 1024*2, NULL, configMAX_PRIORITIES-1, NULL);
}
modem_dte_t *esp_modem_dte_init(const esp_modem_dte_config_t *config)
{
esp_err_t res;
/* malloc memory for esp_dte object */
esp_modem_dte_t *esp_dte = calloc(1, sizeof(esp_modem_dte_t));
MODEM_CHECK(esp_dte, "calloc esp_dte failed", err_dte_mem);
/* malloc memory to storing lines from modem dce */
esp_dte->buffer = calloc(1, ESP_MODEM_LINE_BUFFER_SIZE);
MODEM_CHECK(esp_dte->buffer, "calloc line memory failed", err_line_mem);
/* Set attributes */
esp_dte->uart_port = config->port_num;
esp_dte->parent.flow_ctrl = config->flow_control;
/* Bind methods */
esp_dte->parent.send_cmd = esp_modem_dte_send_cmd;
esp_dte->parent.send_data = esp_modem_dte_send_data;
esp_dte->parent.send_wait = esp_modem_dte_send_wait;
esp_dte->parent.change_mode = esp_modem_dte_change_mode;
esp_dte->parent.process_cmd_done = esp_modem_dte_process_cmd_done;
esp_dte->parent.deinit = esp_modem_dte_deinit;
/* Config UART */
uart_config_t uart_config = {
.baud_rate = config->baud_rate,
.data_bits = config->data_bits,
.parity = config->parity,
.stop_bits = config->stop_bits,
.flow_ctrl = (config->flow_control == MODEM_FLOW_CONTROL_HW) ? UART_HW_FLOWCTRL_CTS_RTS : UART_HW_FLOWCTRL_DISABLE
};
MODEM_CHECK(uart_param_config(esp_dte->uart_port, &uart_config) == ESP_OK, "config uart parameter failed", err_uart_config);
if (config->flow_control == MODEM_FLOW_CONTROL_HW) {
res = uart_set_pin(esp_dte->uart_port, CONFIG_MODEM_TX_PIN, CONFIG_MODEM_RX_PIN,
CONFIG_MODEM_RTS_PIN, CONFIG_MODEM_CTS_PIN);
} else {
res = uart_set_pin(esp_dte->uart_port, CONFIG_MODEM_TX_PIN, CONFIG_MODEM_RX_PIN,
UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
}
MODEM_CHECK(res == ESP_OK, "config uart gpio failed", err_uart_config);
/* Set flow control threshold */
if (config->flow_control == MODEM_FLOW_CONTROL_HW) {
res = uart_set_hw_flow_ctrl(esp_dte->uart_port, UART_HW_FLOWCTRL_CTS_RTS, UART_FIFO_LEN - 8);
} else if (config->flow_control == MODEM_FLOW_CONTROL_SW) {
res = uart_set_sw_flow_ctrl(esp_dte->uart_port, true, 8, UART_FIFO_LEN - 8);
}
MODEM_CHECK(res == ESP_OK, "config uart flow control failed", err_uart_config);
/* Install UART driver and get event queue used inside driver */
res = uart_driver_install(esp_dte->uart_port, CONFIG_UART_RX_BUFFER_SIZE, CONFIG_UART_TX_BUFFER_SIZE,
CONFIG_UART_EVENT_QUEUE_SIZE, &(esp_dte->event_queue), 0);
MODEM_CHECK(res == ESP_OK, "install uart driver failed", err_uart_config);
/* Set pattern interrupt, used to detect the end of a line. */
res = uart_enable_pattern_det_intr(esp_dte->uart_port, '\n', 1, MIN_PATTERN_INTERVAL, MIN_POST_IDLE, MIN_PRE_IDLE);
/* Set pattern queue size */
res |= uart_pattern_queue_reset(esp_dte->uart_port, CONFIG_UART_PATTERN_QUEUE_SIZE);
MODEM_CHECK(res == ESP_OK, "config uart pattern failed", err_uart_pattern);
/* Create Event loop */
esp_event_loop_args_t loop_args = {
.queue_size = ESP_MODEM_EVENT_QUEUE_SIZE,
.task_name = NULL
};
MODEM_CHECK(esp_event_loop_create(&loop_args, &esp_dte->event_loop_hdl) == ESP_OK, "create event loop failed", err_eloop);
/* Create semaphore */
esp_dte->process_sem = xSemaphoreCreateBinary();
MODEM_CHECK(esp_dte->process_sem, "create process semaphore failed", err_sem);
/* Create UART Event task */
BaseType_t ret = xTaskCreate(uart_event_task_entry, //Task Entry
"uart_event", //Task Name
CONFIG_UART_EVENT_TASK_STACK_SIZE, //Task Stack Size(Bytes)
esp_dte, //Task Parameter
CONFIG_UART_EVENT_TASK_PRIORITY, //Task Priority
& (esp_dte->uart_event_task_hdl) //Task Handler
);
MODEM_CHECK(ret == pdTRUE, "create uart event task failed", err_tsk_create);
return &(esp_dte->parent);
/* Error handling */
err_tsk_create:
vSemaphoreDelete(esp_dte->process_sem);
err_sem:
esp_event_loop_delete(esp_dte->event_loop_hdl);
err_eloop:
uart_disable_pattern_det_intr(esp_dte->uart_port);
err_uart_pattern:
uart_driver_delete(esp_dte->uart_port);
err_uart_config:
free(esp_dte->buffer);
err_line_mem:
free(esp_dte);
err_dte_mem:
return NULL;
}
esp_err_t esp_modem_add_event_handler(modem_dte_t *dte, esp_event_handler_t handler, void *handler_args)
{
esp_modem_dte_t *esp_dte = __containerof(dte, esp_modem_dte_t, parent);
return esp_event_handler_register_with(esp_dte->event_loop_hdl, ESP_MODEM_EVENT, ESP_EVENT_ANY_ID, handler, handler_args);
}
