From 8f576045ed7a30f99e93bc0b0855747e307ff28d Mon Sep 17 00:00:00 2001
From: Eggert Jung <eggert.s.jung@wischhof13.de>
Date: Mon, 28 Apr 2025 20:40:04 +0200
Subject: [PATCH] add systemview for debugging purposes

---
 .gitmodules        | 3 +++
 Drivers/SystemView | 1 +
 Makefile           | 7 ++++++-
 Src/main.c         | 8 ++++++++
 Src/stm32g0xx_it.c | 5 +++--
 compile_flags.txt  | 3 +++
 6 files changed, 24 insertions(+), 3 deletions(-)
 create mode 160000 Drivers/SystemView

diff --git a/.gitmodules b/.gitmodules
index c7477c3..bfbbd8f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "Drivers/RTT"]
 	path = Drivers/RTT
 	url = https://github.com/SEGGERMicro/RTT.git
+[submodule "Drivers/SystemView"]
+	path = Drivers/SystemView
+	url = https://github.com/SEGGERMicro/SystemView.git
diff --git a/Drivers/SystemView b/Drivers/SystemView
new file mode 160000
index 0000000..d8bbf3f
--- /dev/null
+++ b/Drivers/SystemView
@@ -0,0 +1 @@
+Subproject commit d8bbf3f6e779af76a09cf7000c2003ab17ca11c6
diff --git a/Makefile b/Makefile
index a9afc44..64ff4cf 100644
--- a/Makefile
+++ b/Makefile
@@ -58,6 +58,8 @@ Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_exti.c \
 Drivers/RTT/RTT/SEGGER_RTT.c \
 Drivers/RTT/RTT/SEGGER_RTT_printf.c \
 Drivers/RTT/Syscalls/SEGGER_RTT_Syscalls_GCC.c \
+Drivers/SystemView/SYSVIEW/SEGGER_SYSVIEW.c \
+Drivers/SystemView/Sample/NoOS/Config/Cortex-M0/SEGGER_SYSVIEW_Config_NoOS_CM0.c\
 Src/system_stm32g0xx.c
 
 # ASM sources
@@ -124,7 +126,10 @@ C_INCLUDES =  \
 -IDrivers/CMSIS/Device/ST/STM32G0xx/Include \
 -IDrivers/CMSIS/Include \
 -IDrivers/RTT/Config \
--IDrivers/RTT/RTT
+-IDrivers/RTT/RTT \
+-IDrivers/SystemView/Config \
+-IDrivers/SystemView/SEGGER \
+-IDrivers/SystemView/SYSVIEW
 
 
 # compile gcc flags
diff --git a/Src/main.c b/Src/main.c
index 2bb25b7..20fa865 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -21,6 +21,7 @@
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
+#include "SEGGER_SYSVIEW.h"
 #include "SEGGER_RTT.h"
 #include "stm32g0b1xx.h"
 #include "stm32g0xx_hal_cortex.h"
@@ -119,6 +120,7 @@ void init_UART1_dma(){
 }
 
 void USART1_IRQHandler(){
+    SEGGER_SYSVIEW_RecordEnterISR();
      if(USART1->ISR & USART_ISR_RXNE_RXFNE){
          //printf("%x ", USART1->RDR);
          rxBuffer[rxBufferPos++] = USART1->RDR;
@@ -150,14 +152,17 @@ void USART1_IRQHandler(){
          USART1->ICR = USART_ICR_UDRCF;
          printf("UDR\n");
      }
+    SEGGER_SYSVIEW_RecordExitISR();
 }
 
 void DMA1_Channel1_IRQHandler(){
+    SEGGER_SYSVIEW_RecordEnterISR();
     if(DMA1->ISR & DMA_ISR_TCIF1){
         DMA1->IFCR = DMA_IFCR_CTCIF1;
         DMA1_Channel1->CCR &= ~( DMA_CCR_EN );
         DMA1_Channel1->CMAR  = ( uint32_t )&rxBuffer[0];
     }
+    SEGGER_SYSVIEW_RecordExitISR();
 }
 /* USER CODE END 0 */
 
@@ -167,9 +172,12 @@ void DMA1_Channel1_IRQHandler(){
   */
 int main(void)
 {
+
   /* USER CODE BEGIN 1 */
   SEGGER_RTT_ConfigUpBuffer(0, NULL, NULL, 0, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL);
   printf("Moin!\n");
+
+  SEGGER_SYSVIEW_Conf();            /* Configure and initialize SystemView  */
   /* USER CODE END 1 */
 
   /* MCU Configuration--------------------------------------------------------*/
diff --git a/Src/stm32g0xx_it.c b/Src/stm32g0xx_it.c
index eee2e64..a519df9 100644
--- a/Src/stm32g0xx_it.c
+++ b/Src/stm32g0xx_it.c
@@ -23,6 +23,7 @@
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 #include "stdio.h"
+#include "SEGGER_SYSVIEW.h"
 /* USER CODE END Includes */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -126,11 +127,11 @@ void PendSV_Handler(void)
 void SysTick_Handler(void)
 {
   /* USER CODE BEGIN SysTick_IRQn 0 */
-
+    SEGGER_SYSVIEW_RecordEnterISR();
   /* USER CODE END SysTick_IRQn 0 */
   HAL_IncTick();
   /* USER CODE BEGIN SysTick_IRQn 1 */
-
+  SEGGER_SYSVIEW_RecordExitISR();
   /* USER CODE END SysTick_IRQn 1 */
 }
 
diff --git a/compile_flags.txt b/compile_flags.txt
index 5efdd1b..92d6f97 100644
--- a/compile_flags.txt
+++ b/compile_flags.txt
@@ -9,6 +9,9 @@
 -IDrivers/CMSIS/Include
 -IDrivers/RTT/Config
 -IDrivers/RTT/RTT
+-IDrivers/SystemView/Config
+-IDrivers/SystemView/SEGGER
+-IDrivers/SystemView/SYSVIEW
 -Og
 -Wall
 -fdata-sections