spi data race fix to be tested

system/src/drivers/l4/spi_stm32l4xx.c

@@ -621,22 +621,22 @@ void spi_irq_handler(void) {
 					*(uint8_t *)(&SPI2->DR) = spi_tx_buffer_ptr[spi_current_tx_cntr++];
 				}
 				else {
-					while((SPI2->SR & SPI_SR_BSY) != 0) {	// blocking!!
+					do {	// blocking!!
 						// clear RX fifo while rest of bytes are transmitted
 						do {
 							spi_garbage = SPI2->DR & 0xFF;
 						} while ((SPI2->SR & SPI_SR_RXNE) != 0);
-					}
+					} while ((SPI2->SR & SPI_SR_BSY) != 0);
 
 					// finish transmission
 					spi_tx_state = SPI_TX_DONE;
 
 					// check if reception shall begin
-					if (spi_rx_state == SPI_RX_WAITING_FOR_RX) {
-						spi_rx_state = SPI_RX_RXING;
-
-						*(uint8_t *)(&SPI2->DR) = 0xFF;
-					}
+//					if (spi_rx_state == SPI_RX_WAITING_FOR_RX) {
+//						spi_rx_state = SPI_RX_RXING;
+//
+//						*(uint8_t *)(&SPI2->DR) = 0xFF;
+//					}
 
 					break;
 				}
@@ -648,6 +648,11 @@ void spi_irq_handler(void) {
 			if (spi_rx_state == SPI_RX_RXING) {
 				*(uint8_t *)(&SPI2->DR) = 0xFF;
 			}
+			else if (spi_rx_state == SPI_RX_WAITING_FOR_RX) {
+				spi_rx_state = SPI_RX_RXING;
+
+				*(uint8_t *)(&SPI2->DR) = 0xFF;
+			}
 		}
 	}
 

system/src/drivers/max31865.c

@@ -9,6 +9,8 @@
 #include "drivers/max31865.h"
 #include <math.h>
 
+#define DATA_RACE_WORKAROUND
+
 #define REFERENCE_RESISTOR 4300.0f
 
 #define RTD_A 3.9083e-3
@@ -319,6 +321,12 @@ void max31865_pool(void) {
 				// get a pointer to results
 				result_ptr = spi_get_rx_data();
 
+#ifdef DATA_RACE_WORKAROUND
+				if ((max31865_current_config_register & 0xDF) == *(result_ptr + 1)) {
+					result_ptr++;
+				}
+#endif
+
 				// check communication results by comparing a value of config register
 				if ((max31865_current_config_register & 0xDF) == *result_ptr) {	// fifth bit read always zero
 					// save raw results