diff --git a/Libraries/Si446x/si446x.c b/Libraries/Si446x/si446x.c
--- a/Libraries/Si446x/si446x.c
+++ b/Libraries/Si446x/si446x.c
@@ -221,7 +221,7 @@ void si446x_sendcmd(uint8_t tx_len, uint
     // using transmit receive to transmit data because it actually blocks until the data is sent
     // an additional byte is added on to the transmission so we can receive the CTS byte
 
-    HAL_StatusTypeDef res = HAL_SPI_TransmitReceive(&hspi1, data, dummyrx, tx_len+1, SI446x_TIMEOUT);
+    volatile HAL_StatusTypeDef res = HAL_SPI_TransmitReceive(&hspi1, data, dummyrx, tx_len+1, SI446x_TIMEOUT);
 
     if(res != HAL_OK)
     {
@@ -243,7 +243,7 @@ void si446x_sendcmd(uint8_t tx_len, uint
 		tx_requestack[0] = SI446x_CMD_READ_CMD_BUFF;
 		tx_requestack[1] = 0x00;
 
-		uint16_t attempts = 0;
+		volatile uint16_t attempts = 0;
 
 		// Keep trying receive until it returns 0xFF (successful ACK)
 		while (reply != 0xFF)
@@ -273,6 +273,7 @@ void si446x_sendcmd(uint8_t tx_len, uint
 			if(attempts > 1024)
 			{
 				//error_assert_silent(ERR_VHF_TIMEOUT);
+				volatile uint32_t test = 344;
 				break; // Break out, deinit and exit
 			}
 			attempts++;
@@ -378,7 +379,7 @@ static void __init_spi1(void)
 
 	// SPI pins
 	__SPI1_CLK_ENABLE();
-	GPIO_InitStruct.Pin = SI446x_SCK_PIN|SI446x_MOSI_PIN|SI446x_MOSI_PIN;
+	GPIO_InitStruct.Pin = SI446x_SCK_PIN|SI446x_MOSI_PIN|SI446x_MISO_PIN;
 	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 	GPIO_InitStruct.Pull = GPIO_NOPULL;
 	GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
@@ -395,7 +396,7 @@ static void __init_spi1(void)
 	hspi1.Init.CLKPolarity = SPI_POLARITY_LOW; // Double-check, this is usually high, but might be low for this chip
 	hspi1.Init.CLKPhase = SPI_PHASE_1EDGE; // was 1edge before (rising edge of clock)
 	hspi1.Init.NSS = SPI_NSS_SOFT;
-	hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
+	hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
 	hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
 	hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
 	hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;