LoRa Gateway: SX1301/1308的SPI無論怎麼寫, 讀出來都是預設值

症狀:

1. lora_pkt_fwd load fw failed
ERROR: Failed to load fw 1
ERROR: Version of calibration firmware not expected, actual:0 expected:2

2. util_spi_stress 4 test items all failed

3. spidev_test write SX1301/1308 register but always get default value


原因:

SX1301/1308 處於 reset 狀態.
因為 SX1301/1308 的 reset 方向跟一般的 IC 相反.