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Xmc interrupt uart fix #430

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Merged
dineshgit411 merged 6 commits into from
Feb 27, 2026
Merged

Xmc interrupt uart fix #430

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407add6
cores/xmc: Change to channel1.
dineshgit411 Feb 23, 2026
f3badc9
variants/XMC1400: Change the slice number.
dineshgit411 Feb 23, 2026
447c957
cores/xmc: Fixed 1400-Arduino interrupt.
dineshgit411 Feb 24, 2026
94a44a3
variants/XMC1400: Change the interrupt 1 to pin number 7.
dineshgit411 Feb 24, 2026
2272d3e
docs: Modified interrupt related.
dineshgit411 Feb 24, 2026
181d5a3
docs/img: Updated 1400 Arduino pinout.
dineshgit411 Feb 27, 2026
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14 changes: 7 additions & 7 deletions cores/xmc/WInterrupts.c
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Original file line number Diff line number Diff line change
Expand Up @@ -125,8 +125,13 @@ void attachInterrupt(pin_size_t interrupt_num, voidFuncPtr callback, PinStatus m
XMC_CCU4_EnableClock(pin_irq.ccu, pin_irq.slice_num);

if (pin_irq.irq_num == 0) {
#if defined(KIT_XMC11_BOOT_001) || defined(KIT_XMC1400_ARDUINO) || defined(KIT_XMC14_2GO)
#if defined(KIT_XMC14_2GO)
/* P1_4 external interrupt goes through USIC to CCU4 */
XMC_USIC_CH_Enable(XMC_USIC0_CH1);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH1, XMC_USIC_CH_INPUT_DX5, USIC0_C0_DX5_P1_4);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH1, XMC_USIC_CH_INPUT_DX2, USIC0_C0_DX2_DX5INS);
#endif
#if defined(KIT_XMC11_BOOT_001) || defined(KIT_XMC1400_ARDUINO)
XMC_USIC_CH_Enable(XMC_USIC0_CH0);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH0, XMC_USIC_CH_INPUT_DX5, USIC0_C0_DX5_P1_4);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH0, XMC_USIC_CH_INPUT_DX2, USIC0_C0_DX2_DX5INS);
Expand All @@ -141,15 +146,10 @@ void attachInterrupt(pin_size_t interrupt_num, voidFuncPtr callback, PinStatus m
interrupt_0_cb = callback;
NVIC_EnableIRQ(CCU40_0_IRQn);
} else if (pin_irq.irq_num == 1) {
#if defined(KIT_XMC13_BOOT_001)
#if defined(KIT_XMC13_BOOT_001) || defined(KIT_XMC1400_ARDUINO)
/* P0_13 external interrupt goes through USIC to CCU4 */
XMC_USIC_CH_Enable(XMC_USIC0_CH0);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH0, XMC_USIC_CH_INPUT_DX2, USIC0_C0_DX2_P0_13);
#endif
#if defined(KIT_XMC1400_ARDUINO)
/* P1_1 external interrupt goes through USIC to CCU4 */
XMC_USIC_CH_Enable(XMC_USIC0_CH1);
XMC_USIC_CH_SetInputSource(XMC_USIC0_CH1, XMC_USIC_CH_INPUT_DX2, USIC0_C1_DX2_P1_1);
#endif
XMC_CCU4_SLICE_EnableMultipleEvents(pin_irq.slice, XMC_CCU4_SLICE_MULTI_IRQ_ID_EVENT1);
XMC_CCU4_SLICE_SetInterruptNode(pin_irq.slice, XMC_CCU4_SLICE_IRQ_ID_EVENT1, 1);
Expand Down
15 changes: 3 additions & 12 deletions docs/arduino-deviations.rst
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Expand Up @@ -46,18 +46,9 @@ to be in INPUT Mode that needs Inputs.
Interrupt
+++++++++

XMC1400 Kit for Arduino - Interrupt 1 and serial conflict
When using the **KIT_XMC1400_ARDUINO** **Interrupt** 1 does not work when serial (UART) is used.
The Pin Mapped to **Interrupt 1** shares the **same hardware bus configuration as UART**.

**Impact:**

- Interrupt will not trigger.
- Serial communication also not work.

**Workarounds:**

- use **Interrupt 0**
XMC1400 Kit for Arduino - Interrupt 1 pin allocated to pin number - **7**
.. code-block::
const byte interruptPin = 7; // for interrupt-1

Wire/I2C Differences
++++++++++++++++++++
Expand Down
Binary file modified docs/img/KIT_XMC1400_ARDUINO_pinout.png
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6 changes: 3 additions & 3 deletions variants/XMC1400/config/KIT_XMC1400_ARDUINO/pins_arduino.h
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Expand Up @@ -110,9 +110,9 @@ extern uint8_t SCK;
#define LED_BUILTIN LED1

#define EXT_INTR_0 25
#define EXT_INTR_1 3
#define EXT_INTR_1 7

#define digitalPinToInterrupt(p) ((p) == 25 ? 0 : ((p) == 3 ? 1 : -1))
#define digitalPinToInterrupt(p) ((p) == 25 ? 0 : ((p) == 7 ? 1 : -1))

/* Mapping interrupt handlers. Notice that XMC1400 can have interrupt handlers working in 3 modes,
the defines below assumes the mode A. For details refer to assembly file and reference manual.
Expand Down Expand Up @@ -181,7 +181,7 @@ bool gpio_current_value[NUM_DIGITAL] = {false};

const XMC_PIN_INTERRUPT_t mapping_interrupt[] = {
/* 0 */ {CCU40, CCU40_CC40, 0, 0, CCU40_IN0_U0C0_DX2INS},
/* 1 */ {CCU40, CCU40_CC41, 1, 1, CCU40_IN1_U0C1_DX2INS}};
/* 1 */ {CCU40, CCU40_CC40, 0, 1, CCU40_IN1_U0C1_DX2INS}};
const uint8_t NUM_INTERRUPT = (sizeof(mapping_interrupt) / sizeof(XMC_PIN_INTERRUPT_t));

/* Mapping of Arduino Pins to PWM4 channels as pin and index in PWM4 channel
Expand Down
2 changes: 1 addition & 1 deletion variants/XMC1400/config/KIT_XMC14_2GO/pins_arduino.h
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Expand Up @@ -179,7 +179,7 @@ bool gpio_current_value[NUM_DIGITAL] = {false};

/* Configurations of Interrupt */
const XMC_PIN_INTERRUPT_t mapping_interrupt[] = {
/* 0 */ {CCU40, CCU40_CC40, 0, 0, CCU40_IN0_U0C0_DX2INS}};
/* 0 */ {CCU40, CCU40_CC41, 1, 0, CCU40_IN0_U0C0_DX2INS}};
const uint8_t NUM_INTERRUPT = (sizeof(mapping_interrupt) / sizeof(XMC_PIN_INTERRUPT_t));

/* Mapping of Arduino Pins to PWM4 channels as pin and index in PWM4 channel
Expand Down
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