Fixed interrupt priority for TMC22xx UART

1 files changed, 3 insertions, 2 deletions

diff --git a/src/RepRapFirmware.h b/src/RepRapFirmware.h
index 4f4ff360..8f5cc5f5 100644
--- a/src/RepRapFirmware.h
+++ b/src/RepRapFirmware.h
@@ -491,7 +491,7 @@ typedef uint32_t FilePosition;
 const FilePosition noFilePosition = 0xFFFFFFFF;
 
 //-------------------------------------------------------------------------------------------------
-// Interrupt priorities - must be chosen with care! 0 is the highest priority, 15 is the lowest.
+// Interrupt priorities - must be chosen with care! 0 is the highest priority, 7 or 15 is the lowest.
 // This interacts with FreeRTOS config constant configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY which is currently defined as 3 for the SAME70 and 5 for the SAM4x.
 // ISRs with better (numerically lower) priorities than this value cannot make FreeRTOS calls, but those interrupts wont be disabled even in FreeRTOS critical sections.
 
@@ -505,6 +505,7 @@ const uint32_t NvicPriorityWiFiUart = 2;		// UART used to receive debug data fro
 
 const uint32_t NvicPriorityMCan = 3;			// CAN interface
 const uint32_t NvicPriorityPins = 3;			// priority for GPIO pin interrupts - filament sensors must be higher than step
+const uint32_t NvicPriorityDriversSerialTMC = 3; // USART or UART used to control and monitor the smart drivers
 const uint32_t NvicPriorityStep = 4;			// step interrupt is next highest, it can preempt most other interrupts
 const uint32_t NvicPriorityUSB = 5;				// USB interrupt
 const uint32_t NvicPriorityHSMCI = 5;			// HSMCI command complete interrupt
@@ -526,13 +527,13 @@ const uint32_t NvicPriorityWatchdog = 0;		// the secondary watchdog has the high
 # endif
 
 const uint32_t NvicPriorityPanelDueUart = 1;	// UART is highest to avoid character loss (it has only a 1-character receive buffer)
-const uint32_t NvicPriorityDriversSerialTMC = 2; // USART or UART used to control and monitor the smart drivers
 
 # if defined(__LPC17xx__)
 constexpr uint32_t NvicPriorityTimerPWM = 4;
 constexpr uint32_t NvicPriorityTimerServo = 5;
 # endif
 
+const uint32_t NvicPriorityDriversSerialTMC = 5; // USART or UART used to control and monitor the smart drivers
 const uint32_t NvicPriorityPins = 5;			// priority for GPIO pin interrupts - filament sensors must be higher than step
 const uint32_t NvicPriorityStep = 6;			// step interrupt is next highest, it can preempt most other interrupts
 const uint32_t NvicPriorityWiFiUart = 7;		// UART used to receive debug data from the WiFi module