machine/renesas: WIP on adding support for Arduino Uno R4

src/machine/board_arduino_unor4.go

@@ -0,0 +1,95 @@
+//go:build arduino_unor4
+
+// This contains the pin mappings for the Arduino Uno R4 board.
+//
+// For more information, see: 
+package machine
+
+// GPIO Pins
+const (
+	D0 Pin = P3_01
+	D1 Pin = P3_02
+	D2 Pin = P1_04
+	D3 Pin = P1_05
+	D4 Pin = P1_06
+	D5 Pin = P1_07
+	D6 Pin = P1_11
+	D7 Pin = P1_12
+	D8 Pin = P3_04
+	D9 Pin = P3_03
+	D10 Pin = P1_03
+	D11 Pin = P4_11
+	D12 Pin = P4_10
+	D13 Pin = P1_02
+)
+
+// Analog pins
+const (
+	A0 Pin = P0_14
+	A1 Pin = P0_00
+	A2 Pin = P0_01
+	A3 Pin = P0_02
+	A4 Pin = P1_01
+	A5 Pin = P1_00
+)
+
+const (
+	LED = D13
+)
+
+
+// UART1 pins
+const (
+	UART_TX_PIN Pin = P1_09
+	UART_RX_PIN Pin = P1_10
+)
+
+// I2C pins
+const (
+	SDA_PIN Pin = A4
+	SCL_PIN Pin = A5
+)
+
+// { BSP_IO_PORT_03_PIN_01,    P301   }, /* (0) D0  -------------------------  DIGITAL  */
+// { BSP_IO_PORT_03_PIN_02,    P302   }, /* (1) D1  */
+// { BSP_IO_PORT_01_PIN_04,    P104   }, /* (2) D2  */
+// { BSP_IO_PORT_01_PIN_05,    P105   }, /* (3) D3~ */
+// { BSP_IO_PORT_01_PIN_06,    P106   }, /* (4) D4  */
+// { BSP_IO_PORT_01_PIN_07,    P107   }, /* (5) D5~ */
+// { BSP_IO_PORT_01_PIN_11,    P111   }, /* (6) D6~ */
+// { BSP_IO_PORT_01_PIN_12,    P112   }, /* (7) D7  */
+// { BSP_IO_PORT_03_PIN_04,    P304   }, /* (8) D8  */
+// { BSP_IO_PORT_03_PIN_03,    P303   }, /* (9) D9~  */
+// { BSP_IO_PORT_01_PIN_03,    P103   }, /* (10) D10~ */
+// { BSP_IO_PORT_04_PIN_11,    P411   }, /* (11) D11~ */
+// { BSP_IO_PORT_04_PIN_10,    P410   }, /* (12) D12 */
+// { BSP_IO_PORT_01_PIN_02,    P102   }, /* (13) D13 */
+// { BSP_IO_PORT_00_PIN_14,    P014   }, /* (14) A0  --------------------------  ANALOG  */
+// { BSP_IO_PORT_00_PIN_00,    P000   }, /* (15) A1  */
+// { BSP_IO_PORT_00_PIN_01,    P001   }, /* (16) A2  */
+// { BSP_IO_PORT_00_PIN_02,    P002   }, /* (17) A3  */
+// { BSP_IO_PORT_01_PIN_01,    P101   }, /* (18) A4/SDA  */
+// { BSP_IO_PORT_01_PIN_00,    P100   }, /* (19) A5/SCL  */
+
+// { BSP_IO_PORT_05_PIN_00,    P500   }, /* (20) Analog voltage measure pin  */
+// { BSP_IO_PORT_04_PIN_08,    P408   }, /* (21) USB switch, drive high for RA4  */
+
+// { BSP_IO_PORT_01_PIN_09,    P109   }, /* (22) D22 ------------------------  TX */
+// { BSP_IO_PORT_01_PIN_10,    P110   }, /* (23) D23 ------------------------  RX */
+// { BSP_IO_PORT_05_PIN_01,    P501   }, /* (24) D24 ------------------------- TX WIFI */
+// { BSP_IO_PORT_05_PIN_02,    P502   }, /* (25) D25 ------------------------- RX WIFI */
+
+// { BSP_IO_PORT_04_PIN_00,    P400   }, /* (26) D26  QWIC SCL */
+// { BSP_IO_PORT_04_PIN_01,    P401   }, /* (27) D27  QWIC SDA */
+
+// { BSP_IO_PORT_00_PIN_03,    P003   }, /* (28) D28  */
+// { BSP_IO_PORT_00_PIN_04,    P004   }, /* (29) D29  */
+// { BSP_IO_PORT_00_PIN_11,    P011   }, /* (30) D30  */
+// { BSP_IO_PORT_00_PIN_12,    P012   }, /* (31) D31  */
+// { BSP_IO_PORT_00_PIN_13,    P013   }, /* (32) D32  */
+// { BSP_IO_PORT_00_PIN_15,    P015   }, /* (33) D33  */
+// { BSP_IO_PORT_02_PIN_04,    P204   }, /* (34) D34  */
+// { BSP_IO_PORT_02_PIN_05,    P205   }, /* (35) D35  */
+// { BSP_IO_PORT_02_PIN_06,    P206   }, /* (36) D36  */
+// { BSP_IO_PORT_02_PIN_12,    P212   }, /* (37) D37  */
+// { BSP_IO_PORT_02_PIN_13,    P213   }, /* (38) D38  */

src/machine/machine_ra4m1.go

@@ -0,0 +1,236 @@
+//go:build ra4m1
+
+package machine
+
+import (
+	"device/renesas"
+	"runtime/volatile"
+	"unsafe"
+)
+
+const deviceName = renesas.Device
+
+const (
+	P0_00 Pin = 0
+	P0_01 Pin = 1
+	P0_02 Pin = 2
+	P0_03 Pin = 3
+	P0_04 Pin = 4
+	P0_05 Pin = 5
+	P0_06 Pin = 6
+	P0_07 Pin = 7
+	P0_08 Pin = 8
+	P0_09 Pin = 9
+	P0_10 Pin = 10
+	P0_11 Pin = 11
+	P0_12 Pin = 12
+	P0_13 Pin = 13
+	P0_14 Pin = 14
+	P0_15 Pin = 15
+	P1_00 Pin = 16
+	P1_01 Pin = 17
+	P1_02 Pin = 18
+	P1_03 Pin = 19
+	P1_04 Pin = 20
+	P1_05 Pin = 21
+	P1_06 Pin = 22
+	P1_07 Pin = 23
+	P1_08 Pin = 24
+	P1_09 Pin = 25
+	P1_10 Pin = 26
+	P1_11 Pin = 27
+	P1_12 Pin = 28
+	P1_13 Pin = 29
+	P1_14 Pin = 30
+	P1_15 Pin = 31
+	P2_00 Pin = 32
+	P2_01 Pin = 33
+	P2_02 Pin = 34
+	P2_03 Pin = 35
+	P2_04 Pin = 36
+	P2_05 Pin = 37
+	P2_06 Pin = 38
+	P2_07 Pin = 39
+	P2_08 Pin = 40
+	P2_09 Pin = 41
+	P2_10 Pin = 42
+	P2_11 Pin = 43
+	P2_12 Pin = 44
+	P2_13 Pin = 45
+	P2_14 Pin = 46
+	P2_15 Pin = 47
+	P3_00 Pin = 48
+	P3_01 Pin = 49
+	P3_02 Pin = 50
+	P3_03 Pin = 51
+	P3_04 Pin = 52
+	P3_05 Pin = 53
+	P3_06 Pin = 54
+	P3_07 Pin = 55
+	P3_08 Pin = 56
+	P3_09 Pin = 57
+	P3_10 Pin = 58
+	P3_11 Pin = 59
+	P3_12 Pin = 60
+	P3_13 Pin = 61
+	P3_14 Pin = 62
+	P3_15 Pin = 63
+	P4_00 Pin = 64
+	P4_01 Pin = 65
+	P4_02 Pin = 66
+	P4_03 Pin = 67
+	P4_04 Pin = 68
+	P4_05 Pin = 69
+	P4_06 Pin = 70
+	P4_07 Pin = 71
+	P4_08 Pin = 72
+	P4_09 Pin = 73
+	P4_10 Pin = 74
+	P4_11 Pin = 75
+	P4_12 Pin = 76
+	P4_13 Pin = 77
+	P4_14 Pin = 78
+	P4_15 Pin = 79
+	P5_00 Pin = 80
+	P5_01 Pin = 81
+	P5_02 Pin = 82
+	P5_03 Pin = 83
+	P5_04 Pin = 84
+	P5_05 Pin = 85
+	P5_06 Pin = 86
+	P5_07 Pin = 87
+	P5_08 Pin = 88
+	P5_09 Pin = 89
+	P5_10 Pin = 90
+	P5_11 Pin = 91
+	P5_12 Pin = 92
+	P5_13 Pin = 93
+	P5_14 Pin = 94
+	P5_15 Pin = 95
+)
+
+const (
+	PinOutput PinMode = iota
+	PinInput
+	PinInputPullUp
+	PinInputPullDown
+)
+
+// Configure configures the gpio pin as per mode.
+func (p Pin) Configure(config PinConfig) {
+	if p == NoPin {
+		return
+	}
+
+	enableWritingPmnPFS()
+
+	switch config.Mode {
+	case PinOutput:
+		setPDR(p, renesas.PFS_P000PFS_PDR_1)
+	default:
+		setPDR(p, renesas.PFS_P000PFS_PDR_0)
+	}
+
+	disableWritingPmnPFS()
+}
+
+// Set drives the pin high if value is true else drives it low.
+func (p Pin) Set(value bool) {
+	if p == NoPin {
+		return
+	}
+
+	port := getPort(p)
+	if port == nil {
+		return
+	}
+
+	if value == true {
+		port.set(p)
+	} else {
+		port.clr(p)
+	}
+}
+
+// Get reads the pin value.
+func (p Pin) Get() bool {
+	return false
+}
+
+var (
+	gpioPort0 = gpioPortType0{renesas.PORT0}
+	gpioPort1 = gpioPortType1{renesas.PORT1}
+	gpioPort2 = gpioPortType1{renesas.PORT2}
+	gpioPort3 = gpioPortType1{renesas.PORT3}
+	gpioPort4 = gpioPortType1{renesas.PORT4}
+	gpioPort5 = gpioPortType0{renesas.PORT5}
+)
+
+func getPort(p Pin) gpioPort {
+	switch getPortNumber(p) {
+	case 0:
+		return gpioPort0
+	case 1:
+		return gpioPort1
+	case 2:
+		return gpioPort2
+	case 3:
+		return gpioPort3
+	case 4:
+		return gpioPort4
+	case 5:
+		return gpioPort5
+	default:
+		return nil
+	}
+}
+
+func getPortNumber(p Pin) int {
+	return int(p) >> 8
+}
+
+type gpioPort interface {
+	set(p Pin)
+	clr(p Pin)
+}
+
+type gpioPortType0 struct {
+	port *renesas.PORT0_Type
+}
+
+func (p gpioPortType0) set(pin Pin) {
+	p.port.SetPCNTR3_PORR(1 << pin)
+}
+
+func (p gpioPortType0) clr(pin Pin) {
+	p.port.SetPCNTR3_POSR(1 << pin)
+}
+
+type gpioPortType1 struct {
+	port *renesas.PORT1_Type
+}
+
+func (p gpioPortType1) set(pin Pin) {
+	p.port.SetPCNTR3_PORR(1 << pin)
+}
+
+func (p gpioPortType1) clr(pin Pin) {
+	p.port.SetPCNTR3_POSR(1 << pin)
+}
+
+func enableWritingPmnPFS() {
+	renesas.PMISC.PWPR.Set(0x0)
+	renesas.PMISC.SetPWPR_PFSWE(0x1)
+}
+
+func disableWritingPmnPFS() {
+	renesas.PMISC.PWPR.Set(0x0)
+	renesas.PMISC.SetPWPR_B0WI(0x1)
+}
+
+func setPDR(p Pin, value uint32) {
+	port := getPortNumber(p)
+	bit := int(p) & 0xff
+	reg := (*volatile.Register32)(unsafe.Add(unsafe.Pointer(uintptr(0x40040800)), 0x40*port+4*bit))
+	reg.SetBits(value << renesas.PFS_P000PFS_PDR_Pos)
+}