https://community.nxp.com/t5/S32K/LPUART-Init-Failed-enter-DefaultISR/m-p/1681789#M24786 <P>S32DS v3.5 + S32SDK RTM 4.0.1<BR />examples: S32K144/driver_examples/communication/uart_pal_echo</P><P><BR />In this example, we modified the TX of LPUART in pin_mux.c to PTC9 and RX to PTC8.<BR />Added PCC_SetClockMode between CLOCK_SYS_UpdateConfiguration and PINS_DRV_Init in main.c, otherwise the program would enter DefaultISR at line 139 in pins_port_hw_access.c.</P><P>But after circumventing this issue, when initializing the LPUART_DRV_Init, the problem as shown in the picture occurs.</P><P>Instead of using an EVB board, we use a development board of our own design.</P><P><BR />What is the reason for this issue? How to modify it?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="whale_1-1688541152846.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/230861i48368228129A0C57/image-size/large?v=v2&amp;px=999" role="button" title="whale_1-1688541152846.png" alt="whale_1-1688541152846.png" /></span></P> Wed, 05 Jul 2023 07:43:11 GMT whale 2023-07-05T07:43:11Z https://community.nxp.com/t5/S32K/LPUART-Init-Failed-enter-DefaultISR/m-p/1681789#M24786 <P>S32DS v3.5 + S32SDK RTM 4.0.1<BR />examples: S32K144/driver_examples/communication/uart_pal_echo</P><P><BR />In this example, we modified the TX of LPUART in pin_mux.c to PTC9 and RX to PTC8.<BR />Added PCC_SetClockMode between CLOCK_SYS_UpdateConfiguration and PINS_DRV_Init in main.c, otherwise the program would enter DefaultISR at line 139 in pins_port_hw_access.c.</P><P>But after circumventing this issue, when initializing the LPUART_DRV_Init, the problem as shown in the picture occurs.</P><P>Instead of using an EVB board, we use a development board of our own design.</P><P><BR />What is the reason for this issue? How to modify it?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="whale_1-1688541152846.png" style="width: 999px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/230861i48368228129A0C57/image-size/large?v=v2&amp;px=999" role="button" title="whale_1-1688541152846.png" alt="whale_1-1688541152846.png" /></span></P> Wed, 05 Jul 2023 07:43:11 GMT https://community.nxp.com/t5/S32K/LPUART-Init-Failed-enter-DefaultISR/m-p/1681789#M24786 whale 2023-07-05T07:43:11Z https://community.nxp.com/t5/S32K/LPUART-Init-Failed-enter-DefaultISR/m-p/1682580#M24816 <P><A href="mailto:Hi@whale" target="_blank">Hi@whale</A></P> <P>I just followed your test process.</P> <P>1.modified pin mux</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Senlent_0-1688610131852.png" style="width: 615px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/230972i4D7C9314D736A733/image-dimensions/615x156?v=v2" width="615" height="156" role="button" title="Senlent_0-1688610131852.png" alt="Senlent_0-1688610131852.png" /></span></P> <P>2.debug process is ok on myside.</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Senlent_1-1688610159887.png" style="width: 611px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/230973i2492D0C1A41E19D8/image-dimensions/611x240?v=v2" width="611" height="240" role="button" title="Senlent_1-1688610159887.png" alt="Senlent_1-1688610159887.png" /></span></P> <P>&nbsp;</P> <P>So don't doubt whether there is a problem with this demo, you may need to check your hardware, such as external crystal oscillator，because the lpuart module clock source is external crystal oscillator in this demo.</P> <P>&nbsp;</P> Thu, 06 Jul 2023 02:25:54 GMT https://community.nxp.com/t5/S32K/LPUART-Init-Failed-enter-DefaultISR/m-p/1682580#M24816 Senlent 2023-07-06T02:25:54Z