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[variant] Fix XIAO M0 Plus pin definitions and add PIN_NEOPIXEL #81

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Merged
cumin777 merged 4 commits into from
May 20, 2026
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Merged

[variant] Fix XIAO M0 Plus pin definitions and add PIN_NEOPIXEL #81

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69694e5
[variant] Add PIN_NEOPIXEL macro for XIAO M0 Plus RGB LED
cumin777 May 18, 2026
f3b2b89
[variant] Rewrite XIAO M0 Plus variant.cpp with complete and correcte…
cumin777 May 18, 2026
0cd550f
Merge branch 'master' into master
cumin777 May 18, 2026
af8068d
[variant] Add PB02 VBAT_EN pin for XIAO M0 Plus
cumin777 May 20, 2026
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16 changes: 10 additions & 6 deletions variants/XIAO_m0_plus/variant.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -85,10 +85,10 @@ const PinDescription g_APinDescription[]=

// 15..18 - Additional GPIOs
// -----------------------------------------------
// D15 - PA15 (TCC3/WO[3])
{ PORTA, 15, PIO_TIMER_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM3_CH3, TC3_CH3, EXTERNAL_INT_15 },
// D16 - PA14 (TCC3/WO[2])
{ PORTA, 14, PIO_TIMER_ALT, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER_ALT), No_ADC_Channel, PWM3_CH2, TC3_CH2, EXTERNAL_INT_14 },
// D15 - PA15 (TC3/WO[1])
{ PORTA, 15, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM3_CH1, TC3_CH1, EXTERNAL_INT_15 },
// D16 - PA14 (TC3/WO[0])
{ PORTA, 14, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM3_CH0, TC3_CH0, EXTERNAL_INT_14 },
// D17 - PA13 (TCC2/WO[1])
{ PORTA, 13, PIO_TIMER, (PIN_ATTR_DIGITAL|PIN_ATTR_PWM|PIN_ATTR_TIMER), No_ADC_Channel, PWM2_CH1, TCC2_CH1, EXTERNAL_INT_13 },
// D18 - PA12 (TCC2/WO[0])
Expand All @@ -113,7 +113,7 @@ const PinDescription g_APinDescription[]=
// 24..27 - More GPIOs
// -----------------------------------------------
// D24 - PB23
{ PORTB, 23, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_7 },
{ PORTB, 23, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
// D25 - PA23
{ PORTA, 23, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_7 },
// D26 - PA22
Expand All @@ -130,7 +130,11 @@ const PinDescription g_APinDescription[]=
// USB_DM - PA24
{ PORTA, 24, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },
// USB_DP - PA25
{ PORTA, 25, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }
{ PORTA, 25, PIO_COM, PIN_ATTR_NONE, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE },

// 31 - VBAT_EN (PB02)
// -----------------------------------------------
{ PORTB, 2, PIO_DIGITAL, PIN_ATTR_DIGITAL, No_ADC_Channel, NOT_ON_PWM, NOT_ON_TIMER, EXTERNAL_INT_NONE }
} ;

const void* g_apTCInstances[TCC_INST_NUM+TC_INST_NUM]={ TCC0, TCC1, TCC2, TC3, TC4, TC5 } ;
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11 changes: 8 additions & 3 deletions variants/XIAO_m0_plus/variant.h
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Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,8 @@
// ----

// Number of pins defined in PinDescription array
#define PINS_COUNT (31u)
#define NUM_DIGITAL_PINS (31u)
#define PINS_COUNT (32u)
#define NUM_DIGITAL_PINS (32u)
#define NUM_ANALOG_INPUTS (11u)
#define NUM_ANALOG_OUTPUTS (1u)

Expand Down Expand Up @@ -69,11 +69,15 @@
#define LED_BUILTIN PIN_LED

// RGB LED (WS2812B) on PA27
#define PIN_LED_RGB (11u)
#define PIN_LED_RGB (11u)
#define PIN_NEOPIXEL PIN_LED_RGB

// User Button on PB22
#define PIN_BUTTON (28u)

// VBAT_EN on PB02
#define PIN_VBAT_EN (31u)


/*
* Analog pins
Expand Down Expand Up @@ -136,6 +140,7 @@ static const uint8_t DAC0 = PIN_DAC0;
#define D25 (25u)
#define D26 (26u)
#define D27 (27u)
#define D31 (31u)

/*
* SPI Interfaces
Expand Down