more docs

README.md

@@ -2,7 +2,7 @@
 
 Provides SPI driver for SX1276/SX1278 LoRa radio
 
-## Usage
+## Install
 
 Designed to be used as `esp-idf component`. Suggested using as `git submodule`
 
@@ -16,3 +16,43 @@ git submodule update
 
 Uses built in KConfig. Run `make menuconfig` and find config under `Component config` -> `LORA32`.
 Defaults targeted to TTGO LoRa OLED boards.
+
+## Use
+This is the most basic usage. Setting up the LoRa instance, setting it's receive handler, running init then sending a message.
+
+```
+  lora32_cfg_t lora;
+  lora = lora32_create();
+  lora.receive = &handle_lora_receive;
+
+  lora32_init(&lora);
+
+  lora32_send(&lora, "Hello, LoRa", 10);
+
+```
+
+## API
+
+### `lora32_cfg_t static lora32_create()`
+Creates a new LoRa instance
+
+### `uint8_t lora32_init(lora32_cfg_t *config)`
+Initialized LoRa instance. This configures GPIOs, SPI, LoRa radio and receive handlers
+
+Returns 1 on success.
+
+### `uint8_t lora32_data_available(lora32_cfg_t *lora)`
+Indicates if data is presently available.
+
+### `uint8_t lora32_parse_packet(lora32_cfg_t *lora, uint8_t size)`
+
+### `void lora32_send(lora32_cfg_t *config, uint8_t *data, uint8_t len)`
+Transmits data over the LoRa radio.
+
+### `void lora32_set_spreadfactor(lora32_cfg_t *lora, uint8_t factor)`
+Sets LoRa Spread Factor.
+
+Accepts `6`-`12`.
+
+### `void lora32_dump_regs(lora32_cfg_t *lora)`
+Dumps all registers from SX1276