GPIO init for codec reset pin, reset pulse on system start

Core/Inc/main.h

@@ -80,6 +80,8 @@ void Error_Handler(void);
 #define SHR_CLK_GPIO_Port GPIOC
 #define SHR_STR_Pin LL_GPIO_PIN_15
 #define SHR_STR_GPIO_Port GPIOC
+#define CODEC_RST_Pin LL_GPIO_PIN_0
+#define CODEC_RST_GPIO_Port GPIOA
 #define LD2_Pin LL_GPIO_PIN_11
 #define LD2_GPIO_Port GPIOC
 #define SHR_DOUT_DISP_Pin LL_GPIO_PIN_8
@@ -129,7 +131,8 @@ static inline void SHRSTR_HI()      { LL_GPIO_SetOutputPin(   SHR_STR_GPIO_Port,
 static inline void SHRSTR_LO()      { LL_GPIO_ResetOutputPin( SHR_STR_GPIO_Port, 		SHR_STR_Pin); }
 static inline void SHRDIN_HI()      { LL_GPIO_SetOutputPin(   SHR_DOUT_DISP_GPIO_Port, SHR_DOUT_DISP_Pin); }
 static inline void SHRDIN_LO()      { LL_GPIO_ResetOutputPin( SHR_DOUT_DISP_GPIO_Port, SHR_DOUT_DISP_Pin); }
-
+static inline void CODEC_RST_HI()   { LL_GPIO_SetOutputPin(   CODEC_RST_GPIO_Port, 	   CODEC_RST_Pin); }
+static inline void CODEC_RST_LO()   { LL_GPIO_ResetOutputPin( CODEC_RST_GPIO_Port, 	   CODEC_RST_Pin); }
 
 /* USER CODE END Private defines */
 

Core/Src/main.c

@@ -185,6 +185,12 @@ int main(void)
   MX_I2S2_Init();
   MX_I2C1_Init();
   /* USER CODE BEGIN 2 */
+
+  CODEC_RST_LO();    // Reset the audio codec via HW reset pin
+  __NOP();
+  __NOP();
+  CODEC_RST_HI();
+
   init_printf(NULL, &uart_putc);
 
   LL_TIM_GenerateEvent_UPDATE(TIM2);
@@ -1062,6 +1068,9 @@ static void MX_GPIO_Init(void)
   /**/
   LL_GPIO_ResetOutputPin(SHR_DOUT_DISP_GPIO_Port, SHR_DOUT_DISP_Pin);
 
+  /**/
+  LL_GPIO_SetOutputPin(CODEC_RST_GPIO_Port, CODEC_RST_Pin);
+
   /**/
   LL_GPIO_SetOutputPin(LD2_GPIO_Port, LD2_Pin);
 
@@ -1073,6 +1082,14 @@ static void MX_GPIO_Init(void)
   GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
   LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
+  /**/
+  GPIO_InitStruct.Pin = CODEC_RST_Pin;
+  GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;
+  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
+  GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
+  LL_GPIO_Init(CODEC_RST_GPIO_Port, &GPIO_InitStruct);
+
   /**/
   GPIO_InitStruct.Pin = SHR_DOUT_DISP_Pin;
   GPIO_InitStruct.Mode = LL_GPIO_MODE_OUTPUT;

DigitalAudioH533.ioc

@@ -111,41 +111,42 @@ Mcu.Name=STM32H533RETx
 Mcu.Package=LQFP64
 Mcu.Pin0=PC14-OSC32_IN(OSC32_IN)
 Mcu.Pin1=PC15-OSC32_OUT(OSC32_OUT)
-Mcu.Pin10=PB12
-Mcu.Pin11=PB13
-Mcu.Pin12=PB14
-Mcu.Pin13=PB15
-Mcu.Pin14=PA13(JTMS/SWDIO)
-Mcu.Pin15=PA14(JTCK/SWCLK)
-Mcu.Pin16=PC11
-Mcu.Pin17=PC12
-Mcu.Pin18=PD2
-Mcu.Pin19=PB6
+Mcu.Pin10=PB10
+Mcu.Pin11=PB12
+Mcu.Pin12=PB13
+Mcu.Pin13=PB14
+Mcu.Pin14=PB15
+Mcu.Pin15=PA13(JTMS/SWDIO)
+Mcu.Pin16=PA14(JTCK/SWCLK)
+Mcu.Pin17=PC11
+Mcu.Pin18=PC12
+Mcu.Pin19=PD2
 Mcu.Pin2=PH0-OSC_IN(PH0)
-Mcu.Pin20=PB7
-Mcu.Pin21=PB8
-Mcu.Pin22=VP_CORTEX_M33_NS_VS_Hclk
-Mcu.Pin23=VP_GPDMA1_VS_GPDMACH0
-Mcu.Pin24=VP_GPDMA1_VS_GPDMACH1
-Mcu.Pin25=VP_GPDMA1_VS_GPDMACH2
-Mcu.Pin26=VP_GPDMA1_VS_GPDMACH3
-Mcu.Pin27=VP_GPDMA2_VS_GPDMACH0
-Mcu.Pin28=VP_ICACHE_VS_ICACHE
-Mcu.Pin29=VP_PWR_VS_SECSignals
+Mcu.Pin20=PB6
+Mcu.Pin21=PB7
+Mcu.Pin22=PB8
+Mcu.Pin23=VP_CORTEX_M33_NS_VS_Hclk
+Mcu.Pin24=VP_GPDMA1_VS_GPDMACH0
+Mcu.Pin25=VP_GPDMA1_VS_GPDMACH1
+Mcu.Pin26=VP_GPDMA1_VS_GPDMACH2
+Mcu.Pin27=VP_GPDMA1_VS_GPDMACH3
+Mcu.Pin28=VP_GPDMA2_VS_GPDMACH0
+Mcu.Pin29=VP_ICACHE_VS_ICACHE
 Mcu.Pin3=PH1-OSC_OUT(PH1)
-Mcu.Pin30=VP_PWR_VS_LPOM
-Mcu.Pin31=VP_SYS_VS_Systick
-Mcu.Pin32=VP_TIM2_VS_ClockSourceINT
-Mcu.Pin33=VP_TIM5_VS_ClockSourceINT
-Mcu.Pin34=VP_BOOTPATH_VS_BOOTPATH
-Mcu.Pin35=VP_MEMORYMAP_VS_MEMORYMAP
+Mcu.Pin30=VP_PWR_VS_SECSignals
+Mcu.Pin31=VP_PWR_VS_LPOM
+Mcu.Pin32=VP_SYS_VS_Systick
+Mcu.Pin33=VP_TIM2_VS_ClockSourceINT
+Mcu.Pin34=VP_TIM5_VS_ClockSourceINT
+Mcu.Pin35=VP_BOOTPATH_VS_BOOTPATH
+Mcu.Pin36=VP_MEMORYMAP_VS_MEMORYMAP
 Mcu.Pin4=PC2
-Mcu.Pin5=PA1
-Mcu.Pin6=PA2
-Mcu.Pin7=PA3
-Mcu.Pin8=PB1
-Mcu.Pin9=PB10
-Mcu.PinsNb=36
+Mcu.Pin5=PA0
+Mcu.Pin6=PA1
+Mcu.Pin7=PA2
+Mcu.Pin8=PA3
+Mcu.Pin9=PB1
+Mcu.PinsNb=37
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32H533RETx
@@ -163,6 +164,13 @@ NVIC.SVCall_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
 NVIC.SysTick_IRQn=true\:15\:0\:false\:false\:false\:false\:false\:false
 NVIC.UART5_IRQn=true\:0\:0\:false\:false\:false\:true\:false\:true
 NVIC.UsageFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false
+PA0.GPIOParameters=PinState,GPIO_PuPd,GPIO_Label,GPIO_ModeDefaultOutputPP
+PA0.GPIO_Label=CODEC_RST
+PA0.GPIO_ModeDefaultOutputPP=GPIO_MODE_OUTPUT_OD
+PA0.GPIO_PuPd=GPIO_PULLUP
+PA0.Locked=true
+PA0.PinState=GPIO_PIN_SET
+PA0.Signal=GPIO_Output
 PA1.GPIOParameters=GPIO_Speed
 PA1.GPIO_Speed=GPIO_SPEED_FREQ_HIGH
 PA1.Mode=Hardware Flow Control (RS485)