Can't transmit data with LoRa

[krf]

Hi everyone,

I have custom stm32wle board that is configured as dc-dc supply, and external 32MHz crystal with 6.8pF capacitors.

I can read and write to/from radio registers but i can't transmit any data. Indeed even transmit interrupt (HAL_SUBGHZ_TxCpltCallback) is fired after i call sx126x_set_tx() function. 

void send_data(){

err += loradio_reset(p);

err += sx126x_set_pkt_type(p, SX126X_PKT_TYPE_LORA);

struct loradio_params_str radio_params;

radio_params.bw = LORADIO_BW_125;

radio_params.cr = LORADIO_CR_4_5;

radio_params.sf = LORADIO_SF7;

radio_params.ldro = 0;

radio_params.preamble_len_in_symb = 8;

radio_params.header_type = LORADIO_LORA_PKT_EXPLICIT;

radio_params.payload_length = 23;

radio_params.crc_enabled = true; //true

radio_params.invert_iq_enabled = true; //true

radio_params.radio_freq = 915000000;

err += loradio_set_lora_params(p, radio_params); // it is a function firstly set lora mod params and then paket params

err += sx126x_set_reg_mode(p, SX126X_REG_MODE_DCDC); //LDO

err += sx126x_cal(p, SX126X_CAL_ALL);

err += sx126x_set_standby(p, SX126X_STANDBY_CFG_RC);//SX126X_STANDBY_CFG_RC //rc

sx126x_pa_cfg_params_t *pa1_cfg = malloc(sizeof(sx126x_pa_cfg_params_t));

pa1_cfg->device_sel = 0x00;

pa1_cfg->hp_max = 0x02; //0x02

pa1_cfg->pa_duty_cycle = 0x02; //2

pa1_cfg->pa_lut = 0x01;

err += sx126x_set_pa_cfg(p, pa1_cfg);

err += sx126x_set_tx_params(p, 0x0e, SX126X_RAMP_10_US);

err += sx126x_set_lora_sync_word(p, 0x34); //0x12 for private network, 0x34 for public network

err += sx126x_set_dio_irq_params(p, SX126X_IRQ_ALL, SX126X_IRQ_TX_DONE, SX126X_IRQ_NONE, SX126X_IRQ_RX_DONE);

err += sx126x_clear_irq_status(p, SX126X_IRQ_ALL);

sx126x_pkt_type_t pkt_type = 8;

sx126x_get_pkt_type(p, &pkt_type); // ic an read it as LORA_PACKET

uint8_t rxbuff[255], tx_buff[255];

memcpy(tx_buff, "blablalbalbalbalba", 16);

sx126x_set_buffer_base_address(p, 0, 0);

sx126x_write_buffer(p, 0, tx_buff, 255);

sx126x_read_buffer(p, 0, rxbuff, 255); // i can read blablalbalbalbalba in rxbuff

while(1){

RF_SWITCH_CONTROL(true);

sx126x_set_tx(p, 0);

HAL_Delay(6000);

}

}

PS: I have been scanning with esp32 and sx1262 which succesfully can scan lora packets from another system.

Also i run it same code with stm32f429-sx1262 module which has txco config with DC-DC supply and it succesfully transmit data and i can see it with esp32-sx1262 system.

Another things i am using HAL_SUBGHZ functions with stm32wle and also using HAL_SPI functions with stm32f429 in low-layer communication and there is no any issue with that because in both sitiation i can write and read.

Can you help me? Thanks...