Add SD Cards as IO pins - plus fix Serial2 and Serial8 for T4 B2

Fixed the Serial2 object to use the new correct pins, plus made Serial8 only valid for T4 B1 (not B2).

Also I defined IO pins for the six signals associated with the SD Card slot.

I have tested these both as IO pins and now as SPI2

teensy4/HardwareSerial.cpp

@@ -62,7 +62,11 @@
 
 #define UART_CLOCK 24000000
 
+#if defined(__IMXRT1052__)   
 SerialEventCheckingFunctionPointer HardwareSerial::serial_event_handler_checks[8] = {nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr};
+#else
+SerialEventCheckingFunctionPointer HardwareSerial::serial_event_handler_checks[7] = {nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr};
+#endif
 uint8_t HardwareSerial::serial_event_handlers_active = 0;
 
 

teensy4/HardwareSerial.h

@@ -120,7 +120,9 @@ extern "C" {
 	extern void IRQHandler_Serial5();
 	extern void IRQHandler_Serial6();
 	extern void IRQHandler_Serial7();
+	#if defined(__IMXRT1052__)   
 	extern void IRQHandler_Serial8();
+	#endif
 }
 
 typedef void(*SerialEventCheckingFunctionPointer)();
@@ -228,9 +230,12 @@ private:
 	friend void IRQHandler_Serial5();
 	friend void IRQHandler_Serial6();
 	friend void IRQHandler_Serial7();
+	#if defined(__IMXRT1052__)   
 	friend void IRQHandler_Serial8();
-
 	static SerialEventCheckingFunctionPointer serial_event_handler_checks[8];
+	#else	
+	static SerialEventCheckingFunctionPointer serial_event_handler_checks[7];
+	#endif
 	static uint8_t serial_event_handlers_active;
 
 
@@ -243,7 +248,6 @@ extern HardwareSerial Serial4;
 extern HardwareSerial Serial5;
 extern HardwareSerial Serial6;
 extern HardwareSerial Serial7;
-extern HardwareSerial Serial8;
 extern void serialEvent1(void);
 extern void serialEvent2(void);
 extern void serialEvent3(void);
@@ -251,7 +255,11 @@ extern void serialEvent4(void);
 extern void serialEvent5(void);
 extern void serialEvent6(void);
 extern void serialEvent7(void);
+
+	#if defined(__IMXRT1052__)   
+extern HardwareSerial Serial8;
 extern void serialEvent8(void);
+#endif
 
 
 #endif // __cplusplus

teensy4/HardwareSerial2.cpp

@@ -58,8 +58,13 @@ static BUFTYPE rx_buffer2[SERIAL2_RX_BUFFER_SIZE];
 static HardwareSerial::hardware_t UART4_Hardware = {
 	1, IRQ_LPUART4, &IRQHandler_Serial2, &serial_event_check_serial2,
 	CCM_CCGR1, CCM_CCGR1_LPUART4(CCM_CCGR_ON),
+	#if defined(__IMXRT1052__)   
 	6, //IOMUXC_SW_MUX_CTL_PAD_GPIO_B1_01, // pin 6
 	7, // IOMUXC_SW_MUX_CTL_PAD_GPIO_B1_00, // pin 7
+	#elif defined(__IMXRT1062__)
+	7, //IOMUXC_SW_MUX_CTL_PAD_GPIO_B1_01, // pin 6
+	8, // IOMUXC_SW_MUX_CTL_PAD_GPIO_B1_00, // pin 7
+	#endif
 	0xff, // No CTS pin
 	IOMUXC_LPUART4_RX_SELECT_INPUT,
 	2, // page 521

teensy4/HardwareSerial8.cpp

@@ -30,6 +30,7 @@
 
 #include <Arduino.h>
 #include "HardwareSerial.h"
+#if defined(__IMXRT1052__)   
 
 #ifndef SERIAL8_TX_BUFFER_SIZE
 #define SERIAL8_TX_BUFFER_SIZE     40 // number of outgoing bytes to buffer
@@ -73,3 +74,4 @@ HardwareSerial Serial8(&IMXRT_LPUART5, &UART5_Hardware, tx_buffer8, SERIAL8_TX_B
 
 void serialEvent8() __attribute__((weak));
 void serialEvent8() {Serial8.disableSerialEvents(); }		// No use calling this so disable if called...
+#endif

teensy4/core_pins.h

@@ -50,9 +50,9 @@
 
 #if defined(__IMXRT1062__)
 
-#define CORE_NUM_TOTAL_PINS	34
-#define CORE_NUM_DIGITAL	34
-#define CORE_NUM_INTERRUPT	34
+#define CORE_NUM_TOTAL_PINS	40
+#define CORE_NUM_DIGITAL	40
+#define CORE_NUM_INTERRUPT	40
 #define CORE_NUM_ANALOG		14
 #define CORE_NUM_PWM		27
 
@@ -90,6 +90,12 @@
 #define CORE_PIN31_BIT		23
 #define CORE_PIN32_BIT		12
 #define CORE_PIN33_BIT		7
+#define CORE_PIN34_BIT		15
+#define CORE_PIN35_BIT		14
+#define CORE_PIN36_BIT		13
+#define CORE_PIN37_BIT		12
+#define CORE_PIN38_BIT		17
+#define CORE_PIN39_BIT		16
 
 #define CORE_PIN0_BITMASK	(1<<(CORE_PIN0_BIT))
 #define CORE_PIN1_BITMASK	(1<<(CORE_PIN1_BIT))
@@ -125,6 +131,12 @@
 #define CORE_PIN31_BITMASK	(1<<(CORE_PIN31_BIT))
 #define CORE_PIN32_BITMASK	(1<<(CORE_PIN32_BIT))
 #define CORE_PIN33_BITMASK	(1<<(CORE_PIN33_BIT))
+#define CORE_PIN34_BITMASK	(1<<(CORE_PIN34_BIT))
+#define CORE_PIN35_BITMASK	(1<<(CORE_PIN35_BIT))
+#define CORE_PIN36_BITMASK	(1<<(CORE_PIN36_BIT))
+#define CORE_PIN37_BITMASK	(1<<(CORE_PIN37_BIT))
+#define CORE_PIN38_BITMASK	(1<<(CORE_PIN38_BIT))
+#define CORE_PIN39_BITMASK	(1<<(CORE_PIN39_BIT))
 
 #define CORE_PIN0_PORTREG	GPIO1_DR
 #define CORE_PIN1_PORTREG	GPIO1_DR
@@ -160,6 +172,12 @@
 #define CORE_PIN31_PORTREG	GPIO4_DR
 #define CORE_PIN32_PORTREG	GPIO2_DR
 #define CORE_PIN33_PORTREG	GPIO4_DR
+#define CORE_PIN34_PORTREG	GPIO3_DR
+#define CORE_PIN35_PORTREG	GPIO3_DR
+#define CORE_PIN36_PORTREG	GPIO3_DR
+#define CORE_PIN37_PORTREG	GPIO3_DR
+#define CORE_PIN38_PORTREG	GPIO3_DR
+#define CORE_PIN39_PORTREG	GPIO3_DR
 
 #define CORE_PIN0_PORTSET	GPIO1_DR_SET
 #define CORE_PIN1_PORTSET	GPIO1_DR_SET
@@ -195,6 +213,12 @@
 #define CORE_PIN31_PORTSET	GPIO4_DR_SET
 #define CORE_PIN32_PORTSET	GPIO2_DR_SET
 #define CORE_PIN33_PORTSET	GPIO4_DR_SET
+#define CORE_PIN34_PORTSET	GPIO3_DR_SET
+#define CORE_PIN35_PORTSET	GPIO3_DR_SET
+#define CORE_PIN36_PORTSET	GPIO3_DR_SET
+#define CORE_PIN37_PORTSET	GPIO3_DR_SET
+#define CORE_PIN38_PORTSET	GPIO3_DR_SET
+#define CORE_PIN39_PORTSET	GPIO3_DR_SET
 
 #define CORE_PIN0_PORTCLEAR	GPIO1_DR_CLEAR
 #define CORE_PIN1_PORTCLEAR	GPIO1_DR_CLEAR
@@ -230,6 +254,12 @@
 #define CORE_PIN31_PORTCLEAR	GPIO4_DR_CLEAR
 #define CORE_PIN32_PORTCLEAR	GPIO2_DR_CLEAR
 #define CORE_PIN33_PORTCLEAR	GPIO4_DR_CLEAR
+#define CORE_PIN34_PORTCLEAR	GPIO3_DR_CLEAR
+#define CORE_PIN35_PORTCLEAR	GPIO3_DR_CLEAR
+#define CORE_PIN36_PORTCLEAR	GPIO3_DR_CLEAR
+#define CORE_PIN37_PORTCLEAR	GPIO3_DR_CLEAR
+#define CORE_PIN38_PORTCLEAR	GPIO3_DR_CLEAR
+#define CORE_PIN39_PORTCLEAR	GPIO3_DR_CLEAR
 
 #define CORE_PIN0_DDRREG	GPIO1_GDIR
 #define CORE_PIN1_DDRREG	GPIO1_GDIR
@@ -265,6 +295,12 @@
 #define CORE_PIN31_DDRREG	GPIO4_GDIR
 #define CORE_PIN32_DDRREG	GPIO2_GDIR
 #define CORE_PIN33_DDRREG	GPIO4_GDIR
+#define CORE_PIN34_DDRREG	GPIO3_GDIR
+#define CORE_PIN35_DDRREG	GPIO3_GDIR
+#define CORE_PIN36_DDRREG	GPIO3_GDIR
+#define CORE_PIN37_DDRREG	GPIO3_GDIR
+#define CORE_PIN38_DDRREG	GPIO3_GDIR
+#define CORE_PIN39_DDRREG	GPIO3_GDIR
 
 #define CORE_PIN0_PINREG	GPIO1_PSR
 #define CORE_PIN1_PINREG	GPIO1_PSR
@@ -300,6 +336,12 @@
 #define CORE_PIN31_PINREG	GPIO4_PSR
 #define CORE_PIN32_PINREG	GPIO2_PSR
 #define CORE_PIN33_PINREG	GPIO4_PSR
+#define CORE_PIN34_PINREG	GPIO3_PSR
+#define CORE_PIN35_PINREG	GPIO3_PSR
+#define CORE_PIN36_PINREG	GPIO3_PSR
+#define CORE_PIN37_PINREG	GPIO3_PSR
+#define CORE_PIN38_PINREG	GPIO3_PSR
+#define CORE_PIN39_PINREG	GPIO3_PSR
 
 // mux config registers control which peripheral uses the pin
 #define CORE_PIN0_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_AD_B0_03
@@ -336,6 +378,12 @@
 #define CORE_PIN31_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_23
 #define CORE_PIN32_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_B0_12
 #define CORE_PIN33_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_EMC_07
+#define CORE_PIN34_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_03
+#define CORE_PIN35_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_02
+#define CORE_PIN36_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_01
+#define CORE_PIN37_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_00
+#define CORE_PIN38_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_05
+#define CORE_PIN39_CONFIG	IOMUXC_SW_MUX_CTL_PAD_GPIO_SD_B0_04
 
 // pad config registers control pullup/pulldown/keeper, drive strength, etc
 #define CORE_PIN0_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B0_03
@@ -372,6 +420,12 @@
 #define CORE_PIN31_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_23
 #define CORE_PIN32_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_B0_12
 #define CORE_PIN33_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_EMC_07
+#define CORE_PIN34_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_03
+#define CORE_PIN35_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_02
+#define CORE_PIN36_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_01
+#define CORE_PIN37_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_00
+#define CORE_PIN38_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_05
+#define CORE_PIN39_PADCONFIG	IOMUXC_SW_PAD_CTL_PAD_GPIO_SD_B0_04
 
 #define CORE_LED0_PIN		13
 
@@ -388,8 +442,8 @@
 
 #define CORE_RXD0_PIN		0
 #define CORE_TXD0_PIN		1
-#define CORE_RXD1_PIN		6
-#define CORE_TXD1_PIN		7
+#define CORE_RXD1_PIN		7
+#define CORE_TXD1_PIN		8
 #define CORE_RXD2_PIN		15
 #define CORE_TXD2_PIN		14
 #define CORE_RXD3_PIN		16
@@ -435,6 +489,12 @@
 #define CORE_INT31_PIN		31
 #define CORE_INT32_PIN		32
 #define CORE_INT33_PIN		33
+#define CORE_INT34_PIN		34
+#define CORE_INT35_PIN		35
+#define CORE_INT36_PIN		36
+#define CORE_INT37_PIN		37
+#define CORE_INT38_PIN		38
+#define CORE_INT39_PIN		39
 #define CORE_INT_EVERY_PIN	1
 
 
@@ -910,6 +970,20 @@ static inline void digitalWriteFast(uint8_t pin, uint8_t val)
 				CORE_PIN32_PORTSET = CORE_PIN32_BITMASK;
 			} else if (pin == 33) {
 				CORE_PIN33_PORTSET = CORE_PIN33_BITMASK;
+#if defined(__IMXRT1062__)
+			} else if (pin == 34) {
+				CORE_PIN34_PORTSET = CORE_PIN34_BITMASK;
+			} else if (pin == 35) {
+				CORE_PIN35_PORTSET = CORE_PIN35_BITMASK;
+			} else if (pin == 36) {
+				CORE_PIN36_PORTSET = CORE_PIN36_BITMASK;
+			} else if (pin == 37) {
+				CORE_PIN37_PORTSET = CORE_PIN37_BITMASK;
+			} else if (pin == 38) {
+				CORE_PIN38_PORTSET = CORE_PIN38_BITMASK;
+			} else if (pin == 39) {
+				CORE_PIN39_PORTSET = CORE_PIN39_BITMASK;
+#endif
 			}
 		} else {
 			if (pin == 0) {
@@ -980,6 +1054,20 @@ static inline void digitalWriteFast(uint8_t pin, uint8_t val)
 				CORE_PIN32_PORTCLEAR = CORE_PIN32_BITMASK;
 			} else if (pin == 33) {
 				CORE_PIN33_PORTCLEAR = CORE_PIN33_BITMASK;
+#if defined(__IMXRT1062__)
+			} else if (pin == 34) {
+				CORE_PIN34_PORTCLEAR = CORE_PIN34_BITMASK;
+			} else if (pin == 35) {
+				CORE_PIN35_PORTCLEAR = CORE_PIN35_BITMASK;
+			} else if (pin == 36) {
+				CORE_PIN36_PORTCLEAR = CORE_PIN36_BITMASK;
+			} else if (pin == 37) {
+				CORE_PIN37_PORTCLEAR = CORE_PIN37_BITMASK;
+			} else if (pin == 38) {
+				CORE_PIN38_PORTCLEAR = CORE_PIN38_BITMASK;
+			} else if (pin == 39) {
+				CORE_PIN39_PORTCLEAR = CORE_PIN39_BITMASK;
+#endif
 			}
 		}
 	} else {

teensy4/digital.c

@@ -56,7 +56,15 @@ const struct digital_pin_bitband_and_config_table_struct digital_pin_to_info_PGM
 	{&CORE_PIN31_PORTREG, &CORE_PIN31_CONFIG, &CORE_PIN31_PADCONFIG, CORE_PIN31_BITMASK},
 	{&CORE_PIN32_PORTREG, &CORE_PIN32_CONFIG, &CORE_PIN32_PADCONFIG, CORE_PIN32_BITMASK},
 	{&CORE_PIN33_PORTREG, &CORE_PIN33_CONFIG, &CORE_PIN33_PADCONFIG, CORE_PIN33_BITMASK},
-};
+#if defined(__IMXRT1062__)
+	{&CORE_PIN34_PORTREG, &CORE_PIN34_CONFIG, &CORE_PIN34_PADCONFIG, CORE_PIN34_BITMASK},
+	{&CORE_PIN35_PORTREG, &CORE_PIN35_CONFIG, &CORE_PIN35_PADCONFIG, CORE_PIN35_BITMASK},
+	{&CORE_PIN36_PORTREG, &CORE_PIN36_CONFIG, &CORE_PIN36_PADCONFIG, CORE_PIN36_BITMASK},
+	{&CORE_PIN37_PORTREG, &CORE_PIN37_CONFIG, &CORE_PIN37_PADCONFIG, CORE_PIN37_BITMASK},
+	{&CORE_PIN38_PORTREG, &CORE_PIN38_CONFIG, &CORE_PIN38_PADCONFIG, CORE_PIN38_BITMASK},
+	{&CORE_PIN39_PORTREG, &CORE_PIN39_CONFIG, &CORE_PIN39_PADCONFIG, CORE_PIN39_BITMASK},
+#endif
+	};
 
 void digitalWrite(uint8_t pin, uint8_t val)
 {

teensy4/pins_arduino.h

@@ -82,7 +82,7 @@ const static uint8_t SCL = 19;
 #define PIN_SERIAL_TX (1)
 
 
-#define NUM_DIGITAL_PINS  34
+#define NUM_DIGITAL_PINS  40
 #define NUM_ANALOG_INPUTS 12
 
 
@@ -164,12 +164,14 @@ static inline uint8_t digitalPinToTimer(uint8_t pin)
 #define SERIAL_PORT_HARDWARE4		Serial5
 #define SERIAL_PORT_HARDWARE5		Serial6
 #define SERIAL_PORT_HARDWARE6		Serial7
-#define SERIAL_PORT_HARDWARE7		Serial8
 #define SERIAL_PORT_HARDWARE_OPEN3	Serial4
 #define SERIAL_PORT_HARDWARE_OPEN4	Serial5
 #define SERIAL_PORT_HARDWARE_OPEN5	Serial6
 #define SERIAL_PORT_HARDWARE_OPEN6	Serial7
+#if defined(__IMXRT1052__)   
+#define SERIAL_PORT_HARDWARE7		Serial8
 #define SERIAL_PORT_HARDWARE_OPEN7	Serial8
+#endif
 
 #define SerialUSB			Serial