From b6ad15437b5a2f87318eff93793b70e6cd491acc Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Mon, 7 Oct 2019 07:45:49 +0000
Subject: [PATCH] Reworked DAC driver, missing DMAMUX RCC macros for G4.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@13092 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
---
 os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c    | 47 ++++++++++++-------
 os/hal/ports/STM32/STM32G4xx/stm32_rcc.h      | 28 +++++++++++
 ...t ELF file)(OpenOCD, Flash and Run).launch |  4 +-
 .../multi/DAC/make/stm32g474re_nucleo64.make  |  2 +-
 .../multi/DAC/make/stm32h743_nucleo144.make   |  2 +-
 5 files changed, 62 insertions(+), 21 deletions(-)

diff --git a/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c b/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
index ae12906e0..4518ef0a4 100644
--- a/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
+++ b/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
@@ -283,6 +283,7 @@ static void dac_lld_serve_tx_interrupt(DACDriver *dacp, uint32_t flags) {
 
   if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
     /* DMA errors handling.*/
+    dac_lld_stop_conversion(dacp);
     _dac_isr_error_code(dacp, DAC_ERR_DMAFAILURE);
   }
   else {
@@ -431,9 +432,15 @@ void dac_lld_start(DACDriver *dacp) {
     /* Enabling DAC in SW triggering mode initially, initializing data to
        zero.*/
 #if STM32_DAC_DUAL_MODE == FALSE
-    dacp->params->dac->CR &= dacp->params->regmask;
-    dacp->params->dac->CR |= (DAC_CR_EN1 | dacp->config->cr) << dacp->params->regshift;
-    dac_lld_put_channel(dacp, channel, dacp->config->init);
+    {
+      uint32_t cr = dacp->params->dac->CR;
+
+      dacp->params->dac->CR = cr;
+      cr &= dacp->params->regmask;
+      cr |= (DAC_CR_EN1 | dacp->config->cr) << dacp->params->regshift;
+      dacp->params->dac->CR &= dacp->params->regmask;
+      dac_lld_put_channel(dacp, channel, dacp->config->init);
+    }
 #else
     if ((dacp->config->datamode == DAC_DHRM_12BIT_RIGHT_DUAL) ||
         (dacp->config->datamode == DAC_DHRM_12BIT_LEFT_DUAL) ||
@@ -645,7 +652,7 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR12R1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
     break;
   case DAC_DHRM_12BIT_LEFT:
     osalDbgAssert(dacp->grpp->num_channels == 1, "invalid number of channels");
@@ -653,7 +660,7 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR12L1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
     break;
   case DAC_DHRM_8BIT_RIGHT:
     osalDbgAssert(dacp->grpp->num_channels == 1, "invalid number of channels");
@@ -661,7 +668,7 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR8R1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_BYTE | STM32_DMA_CR_MSIZE_BYTE;
+              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_BYTE;
 
     /* In this mode the size of the buffer is halved because two samples
        packed in a single dacsample_t element.*/
@@ -689,7 +696,7 @@ void dac_lld_start_conversion(DACDriver *dacp) {
 
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR8RD);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
     n /= 2;
     break;
 #endif
@@ -706,16 +713,17 @@ void dac_lld_start_conversion(DACDriver *dacp) {
   dmaStreamEnable(dacp->dma);
 
   /* DAC configuration.*/
+  cr = dacp->params->dac->CR;
+
 #if STM32_DAC_DUAL_MODE == FALSE
-  cr = DAC_CR_DMAEN1 | (dacp->grpp->trigger << DAC_CR_TSEL1_Pos) | DAC_CR_TEN1 | DAC_CR_EN1 | dacp->config->cr;
-  dacp->params->dac->CR &= dacp->params->regmask;
-  dacp->params->dac->CR |= cr << dacp->params->regshift;
+  cr &= dacp->params->regmask;
+  cr |= (DAC_CR_DMAEN1 | (dacp->grpp->trigger << DAC_CR_TSEL1_Pos) | DAC_CR_TEN1 | DAC_CR_EN1 | dacp->config->cr) << dacp->params->regshift;
 #else
-  dacp->params->dac->CR = 0;
   cr = DAC_CR_DMAEN1 | (dacp->grpp->trigger << DAC_CR_TSEL1_Pos) | DAC_CR_TEN1 | DAC_CR_EN1 | dacp->config->cr
                      | (dacp->grpp->trigger << DAC_CR_TSEL2_Pos) | DAC_CR_TEN2 | DAC_CR_EN2 | (dacp->config->cr << 16);
-  dacp->params->dac->CR = cr;
 #endif
+
+  dacp->params->dac->CR = cr;
 }
 
 /**
@@ -729,26 +737,31 @@ void dac_lld_start_conversion(DACDriver *dacp) {
  * @iclass
  */
 void dac_lld_stop_conversion(DACDriver *dacp) {
+  uint32_t cr;
 
   /* DMA channel disabled and released.*/
   dmaStreamDisable(dacp->dma);
   dmaStreamFreeI(dacp->dma);
   dacp->dma = NULL;
 
+  cr = dacp->params->dac->CR;
+
 #if STM32_DAC_DUAL_MODE == FALSE
-  dacp->params->dac->CR &= dacp->params->regmask;
-  dacp->params->dac->CR |= (DAC_CR_EN1 | dacp->config->cr) << dacp->params->regshift;
+  cr &= dacp->params->regmask;
+  cr |= (DAC_CR_EN1 | dacp->config->cr) << dacp->params->regshift;
 #else
   if ((dacp->config->datamode == DAC_DHRM_12BIT_RIGHT_DUAL) ||
       (dacp->config->datamode == DAC_DHRM_12BIT_LEFT_DUAL) ||
       (dacp->config->datamode == DAC_DHRM_8BIT_RIGHT_DUAL)) {
-    dacp->params->dac->CR = DAC_CR_EN2 | (dacp->config->cr << 16) |
-                            DAC_CR_EN1 | dacp->config->cr;
+    cr = DAC_CR_EN2 | (dacp->config->cr << 16) |
+         DAC_CR_EN1 | dacp->config->cr;
   }
   else {
-    dacp->params->dac->CR = DAC_CR_EN1 | dacp->config->cr;
+    cr = DAC_CR_EN1 | dacp->config->cr;
   }
 #endif
+
+  dacp->params->dac->CR = cr;
 }
 
 #endif /* HAL_USE_DAC */
diff --git a/os/hal/ports/STM32/STM32G4xx/stm32_rcc.h b/os/hal/ports/STM32/STM32G4xx/stm32_rcc.h
index b4350996c..40d67b052 100644
--- a/os/hal/ports/STM32/STM32G4xx/stm32_rcc.h
+++ b/os/hal/ports/STM32/STM32G4xx/stm32_rcc.h
@@ -508,6 +508,34 @@
 #define rccResetDMA2() rccResetAHB1(RCC_AHB1RSTR_DMA2RST)
 /** @} */
 
+/**
+ * @name    DMAMUX peripheral specific RCC operations
+ * @{
+ */
+/**
+ * @brief   Enables the DMAMUX peripheral clock.
+ *
+ * @param[in] lp        low power enable flag
+ *
+ * @api
+ */
+#define rccEnableDMAMUX(lp) rccEnableAHB1(RCC_AHB1ENR_DMAMUX1EN, lp)
+
+/**
+ * @brief   Disables the DMAMUX peripheral clock.
+ *
+ * @api
+ */
+#define rccDisableDMAMUX() rccDisableAHB1(RCC_AHB1ENR_DMAMUX1EN)
+
+/**
+ * @brief   Resets the DMAMUX peripheral.
+ *
+ * @api
+ */
+#define rccResetDMAMUX() rccResetAHB1(RCC_AHB1RSTR_DMAMUX1RST)
+/** @} */
+
 /**
  * @name    PWR interface specific RCC operations
  * @{
diff --git a/testhal/STM32/multi/DAC/debug/STM32-DAC (Select ELF file)(OpenOCD, Flash and Run).launch b/testhal/STM32/multi/DAC/debug/STM32-DAC (Select ELF file)(OpenOCD, Flash and Run).launch
index df26a7e73..48d82cc4f 100644
--- a/testhal/STM32/multi/DAC/debug/STM32-DAC (Select ELF file)(OpenOCD, Flash and Run).launch	
+++ b/testhal/STM32/multi/DAC/debug/STM32-DAC (Select ELF file)(OpenOCD, Flash and Run).launch	
@@ -33,9 +33,9 @@
 <intAttribute key="org.eclipse.cdt.launch.ATTR_BUILD_BEFORE_LAUNCH_ATTR" value="2"/>
 <stringAttribute key="org.eclipse.cdt.launch.COREFILE_PATH" value=""/>
 <stringAttribute key="org.eclipse.cdt.launch.DEBUGGER_REGISTER_GROUPS" value=""/>
-<stringAttribute key="org.eclipse.cdt.launch.FORMAT" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&lt;contentList&gt;&lt;content id=&quot;rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rp-mfs_flash_read-(cast_to_array)&quot; val=&quot;0:511&quot;/&gt;&lt;content id=&quot;rp[507]-rp-mfs_flash_read-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;rp[506]-rp-mfs_flash_read-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;mfs_buffer[507]-null-mfs_test_001_005_execute-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;mfs_buffer[447]-null-mfs_test_001_005_execute-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;xPSR-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[0]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[1]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[2]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[3]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[4]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[5]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[6]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[7]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[8]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[9]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[10]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[11]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[12]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[13]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[14]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[15]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[16]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[17]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[18]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[19]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[20]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[21]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[22]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[23]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[24]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[25]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[26]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[27]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[28]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[29]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[30]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[31]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;/contentList&gt;"/>
+<stringAttribute key="org.eclipse.cdt.launch.FORMAT" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&lt;contentList&gt;&lt;content id=&quot;CPAR-channel-dma-null-_idle_thread-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CMAR-channel-dma-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CPAR-channel-dma-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CNDTR-channel-dma-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CCR-channel-dma-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;channel-dma-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CPAR-channel-dma-null-error_cb1-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CMAR-channel-dma-dacp-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CPAR-channel-dma-dacp-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CCR-channel-dma-dacp-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CR-dac-params-null-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CMAR-channel-dma-dacp-dac_lld_start_conversion-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CPAR-channel-dma-dacp-dac_lld_start_conversion-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CCR-channel-dma-dacp-dac_lld_start_conversion-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rp-mfs_flash_read-(cast_to_array)&quot; val=&quot;0:511&quot;/&gt;&lt;content id=&quot;rp[507]-rp-mfs_flash_read-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;rp[506]-rp-mfs_flash_read-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;mfs_buffer[507]-null-mfs_test_001_005_execute-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;mfs_buffer[447]-null-mfs_test_001_005_execute-(format)&quot; val=&quot;0&quot;/&gt;&lt;content id=&quot;xPSR-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[0]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[1]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[2]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[3]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[4]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[5]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[6]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[7]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[8]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[9]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[10]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[11]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[12]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[13]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[14]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[15]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[16]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[17]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[18]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[19]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[20]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[21]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[22]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[23]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[24]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[25]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[26]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[27]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[28]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[29]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[30]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;rand[31]-rand-main-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CCR-channel-dma-null-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CPAR-channel-dma-null-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;content id=&quot;CMAR-channel-dma-null-dac_lld_serve_tx_interrupt-(format)&quot; val=&quot;4&quot;/&gt;&lt;/contentList&gt;"/>
 <stringAttribute key="org.eclipse.cdt.launch.GLOBAL_VARIABLES" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&#10;&lt;globalVariableList/&gt;&#10;"/>
-<stringAttribute key="org.eclipse.cdt.launch.MEMORY_BLOCKS" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&#10;&lt;memoryBlockExpressionList&gt;&#10;&lt;memoryBlockExpressionItem&gt;&#10;&lt;expression text=&quot;0x20000c34&quot;/&gt;&#10;&lt;/memoryBlockExpressionItem&gt;&#10;&lt;/memoryBlockExpressionList&gt;&#10;"/>
+<stringAttribute key="org.eclipse.cdt.launch.MEMORY_BLOCKS" value="&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; standalone=&quot;no&quot;?&gt;&#10;&lt;memoryBlockExpressionList/&gt;&#10;"/>
 <stringAttribute key="org.eclipse.cdt.launch.PROGRAM_NAME" value="${selected_resource_loc}"/>
 <stringAttribute key="org.eclipse.cdt.launch.PROJECT_ATTR" value="STM32-DAC"/>
 <booleanAttribute key="org.eclipse.cdt.launch.PROJECT_BUILD_CONFIG_AUTO_ATTR" value="false"/>
diff --git a/testhal/STM32/multi/DAC/make/stm32g474re_nucleo64.make b/testhal/STM32/multi/DAC/make/stm32g474re_nucleo64.make
index d06d9d401..3323a0f0e 100644
--- a/testhal/STM32/multi/DAC/make/stm32g474re_nucleo64.make
+++ b/testhal/STM32/multi/DAC/make/stm32g474re_nucleo64.make
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).
diff --git a/testhal/STM32/multi/DAC/make/stm32h743_nucleo144.make b/testhal/STM32/multi/DAC/make/stm32h743_nucleo144.make
index 205b80d20..4a4d49452 100644
--- a/testhal/STM32/multi/DAC/make/stm32h743_nucleo144.make
+++ b/testhal/STM32/multi/DAC/make/stm32h743_nucleo144.make
@@ -5,7 +5,7 @@
 
 # Compiler options here.
 ifeq ($(USE_OPT),)
-  USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+  USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
 endif
 
 # C specific options here (added to USE_OPT).