LR1110/LR1121 Modem-E v2.1 driver

This project proposes an implementation in C of the drivers for LR1110/LR1121 Modem-E v2.1.

It does not involve any state machine or high level API.

Firmware compatibility

This driver is known to be compatible with firmware LR1110 Modem-E v2.1.0 and LR1121 Modem-E v2.1.0.

Components

The driver is split in several components:

• Transceiver components
  • Bootloader
  • System configuration
  • Register / memory access
  • Direct radio access
  • LR-FHSS
• Modem components
  • Board specific package (BSP)
  • LoRaWAN modem
  • Relay

The transceiver commands are available only if the modem is set to suspended state (by calling modem_e_set_suspend), except for:

• all register and memory access commands
• the following system commands:
  • modem_e_system_get_version
  • modem_e_system_set_reg_mode
  • modem_e_system_set_dio_as_rf_switch
  • modem_e_system_set_dio_irq_params
  • modem_e_system_cfg_lfclk
  • modem_e_system_set_tcxo_mode
  • modem_e_system_reboot
  • modem_e_system_get_vbat
  • modem_e_system_get_temp
  • modem_e_system_get_random_number
  • modem_e_system_read_uid
  • modem_e_system_read_join_eui
  • modem_e_system_read_pin

HAL integration

The SPI commands this driver requires are documented in the file modem_e_hal.h and modem_e_modem_hal.h.

All driver commands are using the HAL from modem_e_modem_hal.h except the bootloader ones that are using the ones from modem_e_hal.h.