142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
#include <esp_log.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/queue.h>
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#include <freertos/semphr.h>
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#include <freertos/task.h>
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// TODO: these should be in Kconfig
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#define TASK_STACK_SIZE (2 * 1024)
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#define TASK_PRIORITY 3
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#define RX_QUEUE_LEN 8
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#define TX_QUEUE_LEN 8
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#define SX127X_MAX_TRANSFER (256)
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#define RESET_DELAY (pdMS_TO_TICKS(15))
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// 8mhz
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#define SPI_CLOCK_HZ (8 * 1000 * 1000)
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#define REG_FIFO 0x00
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#define REG_OP_MODE 0x01
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#define REG_FRF_MSB 0x06
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#define REG_FRF_MID 0x07
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#define REG_FRF_LSB 0x08
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#define REG_PA_CONFIG 0x09
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#define REG_OCP 0x0b
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#define REG_LNA 0x0c
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#define REG_FIFO_ADDR_PTR 0x0d
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#define REG_FIFO_TX_BASE_ADDR 0x0e
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#define REG_FIFO_RX_BASE_ADDR 0x0f
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#define REG_FIFO_RX_CURRENT_ADDR 0x10
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#define REG_IRQ_FLAGS 0x12
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#define REG_RX_NB_BYTES 0x13
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#define REG_PKT_SNR_VALUE 0x19
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#define REG_PKT_RSSI_VALUE 0x1a
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#define REG_MODEM_CONFIG_1 0x1d
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#define REG_MODEM_CONFIG_2 0x1e
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#define REG_PREAMBLE_MSB 0x20
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#define REG_PREAMBLE_LSB 0x21
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#define REG_PAYLOAD_LENGTH 0x22
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#define REG_MODEM_CONFIG_3 0x26
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#define REG_FREQ_ERROR_MSB 0x28
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#define REG_FREQ_ERROR_MID 0x29
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#define REG_FREQ_ERROR_LSB 0x2a
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#define REG_RSSI_WIDEBAND 0x2c
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#define REG_DETECTION_OPTIMIZE 0x31
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#define REG_INVERTIQ 0x33
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#define REG_DETECTION_THRESHOLD 0x37
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#define REG_SYNC_WORD 0x39
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#define REG_INVERTIQ2 0x3b
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#define REG_DIO_MAPPING_1 0x40
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#define REG_VERSION 0x42
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#define REG_PA_DAC 0x4d
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typedef enum sx127x_op_mode {
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SX127X_MODE_SLEEP = 0x00,
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SX127X_MODE_STDBY = 0x01,
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SX127X_MODE_FS_TX = 0x02,
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SX127X_MODE_TX = 0x03,
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SX127X_MODE_FS_RX = 0x04,
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SX127X_MODE_RX_CONT = 0x05,
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SX127X_MODE_RX_SINGLE = 0x06,
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SX127X_MODE_CAD = 0x07,
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SX127X_MODE = 0x07,
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SX127X_LONG_RANGE = (1 << 7)
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} sx127x_op_mode_t;
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#define CONFIG2_CRC 0x04
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#define CONFIG3_AUTO_AGC 0x04
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// PA config
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#define PA_BOOST 0x80
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// IRQ masks
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#define IRQ_TX_DONE_MASK 0x08
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#define IRQ_PAYLOAD_CRC_ERROR_MASK 0x20
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#define IRQ_RX_DONE_MASK 0x40
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#ifdef NODEBUG
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#define SX127X_CHECK(check, str, ret_val, ...) \
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if (!(check)) { \
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ESP_LOGE(SX127X_TAG, str, ##__VA_ARGS__); \
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return (ret_val); \
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}
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#define SX127X_ERROR_CHECK(ret) \
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{ \
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esp_err_t _error_code = (ret); \
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if (_error_code != ESP_OK) { \
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return _error_code; \
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} \
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}
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#define SX127X_ERROR_CHECK2(ret, fun) SX127X_CHECK(ret)
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#else
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#define SX127X_CHECK(check, str, ret_val, ...) \
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if (!(check)) { \
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ESP_LOGE(SX127X_TAG, "%s:%d: check %s failed: " str, __FUNCTION__, \
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__LINE__, #check, ##__VA_ARGS__); \
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return (ret_val); \
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}
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#define SX127X_ERROR_CHECK(ret) \
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{ \
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esp_err_t _error_code = (ret); \
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if (_error_code != ESP_OK) { \
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const char *_error_name = esp_err_to_name(_error_code); \
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ESP_LOGE(SX127X_TAG, "%s:%d: %s (%d)", __FUNCTION__, __LINE__, \
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_error_name, _error_code); \
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return _error_code; \
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} \
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}
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#define SX127X_ERROR_CHECK2(ret, fun) \
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{ \
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esp_err_t _error_code = (ret); \
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if (_error_code != ESP_OK) { \
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const char *_error_name = esp_err_to_name(_error_code); \
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ESP_LOGE(SX127X_TAG, "%s:%d: %s failed: %s (%d)", __FUNCTION__, \
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__LINE__, #fun, _error_name, _error_code); \
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return _error_code; \
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} \
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}
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#endif
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typedef enum sx127x_task_state {
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SX127X_TASK_STOPPED = 0,
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SX127X_TASK_RUNNING = 1,
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SX127X_TASK_STOPPING = 2,
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} sx127x_task_state_t;
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typedef struct sx127x {
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sx127x_config_t config;
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spi_device_handle_t device_handle;
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TaskHandle_t task_handle;
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sx127x_task_state_t task_state;
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// binary semaphore which is given when an interrupt is received from the
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// radio
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SemaphoreHandle_t intr_semaphore;
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// queue of packets received from the radio
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QueueHandle_t rx_packet_queue;
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// queue of packets to send to the radio
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QueueHandle_t tx_packet_queue;
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} sx127x_t;
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const char *SX127X_TAG;
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