include name

include/esp32-lora.h

@@ -29,6 +29,7 @@
 #define REG_PREAMBLE_MSB         0x20
 #define REG_PREAMBLE_LSB         0x21
 #define REG_PAYLOAD_LENGTH       0x22
+#define REG_HOP_PERIOD           0x24
 #define REG_MODEM_CONFIG_3       0x26
 #define REG_RSSI_WIDEBAND        0x2c
 #define REG_DETECTION_OPTIMIZE   0x31
@@ -102,23 +103,30 @@ typedef struct {
 } lora32_handle_t;
 
 typedef struct lora32_cfg_t {
+  char *name;
   uint8_t nss;
   uint8_t cipo;
   uint8_t copi;
   uint8_t clk;
-  uint8_t dio0;
   uint8_t reset;
   uint8_t fifoIdx;
-
-  long frequency;
+  uint8_t channel;
   uint8_t bandwidth;
-
   uint8_t spreadingFactor;
   uint8_t codingRate;
+
+  int8_t dio0;
+  int8_t dio1;
+  int8_t dio2;
+  int8_t channels[64];
+
+  long frequency;
+
   uint16_t preamble;
 
   bool useCRC;
   bool implicitHeader;
+  bool enableFHSS;
 
   receiveCallback receive;
   txdoneCallback tx_done;
@@ -137,9 +145,11 @@ uint8_t lora32_data_available(lora32_cfg_t *lora);
 
 double lora32_calc_datarate(lora32_cfg_t *lora);
 void lora32_dump_regs(lora32_cfg_t *lora);
+void lora32_enable_fhss(lora32_cfg_t *lora, uint8_t period);
 void lora32_enable_continuous_rx(lora32_cfg_t *lora);
 void lora32_enable_single_rx(lora32_cfg_t *lora);
 void lora32_enable_cad(lora32_cfg_t *lora);
+void lora32_disable_fhss(lora32_cfg_t *lora);
 void lora32_toggle_reset(lora32_cfg_t *lora);
 void lora32_send(lora32_cfg_t *config, uint8_t *data, uint8_t len);
 void lora32_set_bandwidth(lora32_cfg_t *lora, uint8_t bw);

main/esp32-lora.c

@@ -107,6 +107,18 @@ void lora32_sleep(lora32_cfg_t *lora) {
   lora32_write_reg(lora, REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_SLEEP);
 }
 
+void lora32_enable_fhss(lora32_cfg_t *lora, uint8_t period) {
+  lora->enableFHSS = true;
+
+  lora32_write_reg(lora, REG_HOP_PERIOD, period);
+}
+
+void lora32_disable_fhss(lora32_cfg_t *lora) {
+  lora->enableFHSS = false;
+
+  lora32_write_reg(lora, REG_HOP_PERIOD, 0);
+}
+
 void lora32_enable_tx(lora32_cfg_t *lora) {
   lora32_standby(lora);
 
@@ -364,7 +376,7 @@ static void IRAM_ATTR lora32_dio_task(void *arg) {
 
   while(1) {
     // wait for event over Queue
-    if(xQueueReceive(dio_event_queue, (void*)lora, portMAX_DELAY) != pdPASS) continue;
+    if(xQueueReceive(dio_event_queue, (void*)&lora, portMAX_DELAY) != pdPASS) continue;
 
     // need a better way to log which event and from which config
     //ESP_LOGI(TAG, "handling DIO0 on GPIO%d", lora->dio0);
@@ -405,6 +417,21 @@ static void IRAM_ATTR lora32_dio_task(void *arg) {
       // these *should* fire at the same time, defaults to false
       if(lora->cad_done != NULL) lora->cad_done(lora, cad_detected);
     }
+
+    if((irqs & IRQ_FHSS_CHANGE) == IRQ_FHSS_CHANGE) {
+      ESP_LOGI(TAG, "switching channel %d: %d", lora->channel, lora->channels[lora->channel]);
+
+      if(lora->channel == 0 && lora->channels[lora->channel] == 0) continue;
+
+      if(lora->channels[lora->channel] == 0) {
+        ESP_LOGI(TAG, "reseting to channel 0");
+        lora->channel = 0;
+      }
+
+      lora32_set_frequency(lora, lora->frequency + (lora->channels[lora->channel] * bandwidths[lora->bandwidth]));
+
+      lora->channel++;
+    }
   }
 }
 
@@ -419,8 +446,8 @@ void lora32_read_data(lora32_cfg_t *lora, uint8_t *data) {
   }
 }
 
-static void IRAM_ATTR lora32_on_dio0(void *arg) {
-  xQueueSend(dio_event_queue, arg, (TickType_t)0);
+static void IRAM_ATTR lora32_on_dio(void *arg) {
+  xQueueSendFromISR(dio_event_queue, (void*)&arg, pdFALSE);
 }
 
 uint8_t lora32_spi_init(lora32_cfg_t *lora) {
@@ -524,14 +551,18 @@ uint8_t lora32_init(lora32_cfg_t *lora) {
   if(lora->receive != NULL) {
     ESP_LOGI(TAG, "Setting GPIO Interrupt");
 
+    // TODO check at least one DIOx pin is not NULL
+
     io_conf.intr_type = GPIO_PIN_INTR_POSEDGE;
-    io_conf.pin_bit_mask = (1ULL << lora->dio0);
+    io_conf.pin_bit_mask = ((1ULL << lora->dio0) | (1ULL << lora->dio1) | (1ULL << lora->dio2));
     io_conf.mode = GPIO_MODE_INPUT;
     io_conf.pull_down_en = 0;
     io_conf.pull_up_en = 0;
     gpio_config(&io_conf);
 
     gpio_set_intr_type(lora->dio0, GPIO_INTR_POSEDGE);
+    gpio_set_intr_type(lora->dio1, GPIO_INTR_POSEDGE);
+    gpio_set_intr_type(lora->dio2, GPIO_INTR_POSEDGE);
 
     // the DIO interrupt handling for every device is done from one task
     if(dio_task_handle == NULL) {
@@ -540,7 +571,7 @@ uint8_t lora32_init(lora32_cfg_t *lora) {
       // enable global ISR service
       gpio_install_isr_service(0);
 
-      dio_event_queue = xQueueCreate(10, sizeof(lora32_cfg_t));
+      dio_event_queue = xQueueCreate(10, sizeof(lora32_cfg_t *));
 
       // this should probably be high priority
       xTaskCreate(&lora32_dio_task, "lora32_dio_task", 4096, NULL, 6, &dio_task_handle);
@@ -548,7 +579,14 @@ uint8_t lora32_init(lora32_cfg_t *lora) {
 
     // add ISR handler to the global service started (once) above
     ESP_LOGI(TAG, "Installing ISR handler for GPIO%d", lora->dio0);
-    gpio_isr_handler_add(lora->dio0, lora32_on_dio0, lora);
+    if(lora->dio0 > -1)
+      gpio_isr_handler_add(lora->dio0, lora32_on_dio, (void*)lora);
+
+    if(lora->dio1 > -1)
+      gpio_isr_handler_add(lora->dio1, lora32_on_dio, (void*)lora);
+
+    if(lora->dio2 > -1)
+      gpio_isr_handler_add(lora->dio2, lora32_on_dio, (void*)lora);
   }
 
   return 1;