Hi,
i'm currently working on a Project where i need to send some data via LoRa.
I've been struggeling to get a transmission going, so i decided to check the basics.
To test the radio, i went ahead and rebuilt the SUBGHZ_Tx_Mode example from the STMCubeWL on my board, implementing the exact code that the example uses.
The MX setup is identical .
When i tested, i found that the code fails the first time that data is received with this function call.
if (HAL_SUBGHZ_ExecGetCmd(&hsubghz, RADIO_GET_STATUS, &RadioResult, 1) != HAL_OK)
{
Error_Handler();
}
HAL_StatusTypeDef HAL_SUBGHZ_ExecGetCmd(SUBGHZ_HandleTypeDef *hsubghz,
SUBGHZ_RadioGetCmd_t Command,
uint8_t *pBuffer,
uint16_t Size)
{
HAL_StatusTypeDef status;
uint8_t *pData = pBuffer;
if (hsubghz->State == HAL_SUBGHZ_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hsubghz);
ret = SUBGHZ_CheckDeviceReady(hsubghz);
/* NSS = 0 */
LL_PWR_SelectSUBGHZSPI_NSS();
ret = SUBGHZSPI_Transmit(hsubghz, (uint8_t)Command);
/* Use to flush the Status (First byte) receive from SUBGHZ as not use */
(void)SUBGHZSPI_Transmit(hsubghz, 0x00U);
for (uint16_t i = 0U; i < Size; i++)
{
ret = SUBGHZSPI_Receive(hsubghz, (pData));
pData++;
}
/* NSS = 1 */
LL_PWR_UnselectSUBGHZSPI_NSS();
(void)SUBGHZ_WaitOnBusy(hsubghz);
if (hsubghz->ErrorCode != HAL_SUBGHZ_ERROR_NONE)
{
status = HAL_ERROR;
}
else
{
status = HAL_OK;
}
More specifically, the SUBGHZSPI_Receive function fills the byte with 0xFF, when the expected values go from 2 to 6.
I checked the return value of SUBGHZSPI_Receive, and it returns HAL_OK.
My question now is: Why does this happen and how can i fix this?
Any help is greatly appreciated.
