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Create "pico2-ice" target board (#5062)

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* Create "pico2-ice" target board

This board has an rp2350b chip on it, as well as a Lattice Semiconductor
iCE40UP5K FPGA. More details of this open hardware board here:

  https://pico2-ice.tinyvision.ai/

Tested on a pico2-ice board with:

  ~/go/bin/tinygo flash -target=pico2-ice src/examples/blinky1/blinky1.go

which blinks the GREEN LED (connected to GPIO0) on this board.

Signed-off-by: Tinkerer <tinkerer@zappem.net>

* More silkscreen labels for pico2-ice board

Reading the schematic and the rev2 board viewer:

https://raw.githubusercontent.com/tinyvision-ai-inc/pico2-ice/refs/heads/main/Board/Rev2/bom/ibom.html

concluded that the RP2350B GPIO pins are not labeled with these
pin numbers in the silkscreen. Instead, the silkscreen refers to
uses of the GPIOs or the ICE numbered pins. RP2340B devoted pins
map to the A1..4 B1..4 pins on the RP PMOD connector. Also
silkscreen "~0".."~6" are labeled as pins N0..N6.

Signed-off-by: Tinkerer <tinkerer@zappem.net>

* Added a smoketest for pico2-ice board and tidied up GPIO defs

Addresses review comments from aykevl.

Signed-off-by: Tinkerer <tinkerer@zappem.net>
This commit is contained in:
tinkerator
2025-10-13 04:19:04 -07:00
committed by GitHub
parent 7460734522
commit 562b4c5020
7 changed files with 267 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
GNUmakefile
+2
View File
@@ -621,6 +621,8 @@ smoketest: testchdir
@$(MD5SUM) test.hex
$(TINYGO) build -size short -o test.hex -target=feather-rp2040 examples/device-id
@$(MD5SUM) test.hex
$(TINYGO) build -size short -o test.hex -target=pico2-ice examples/blinky1
@$(MD5SUM) test.hex
# test simulated boards on play.tinygo.org
ifneq ($(WASM), 0)
GOOS=js GOARCH=wasm $(TINYGO) build -size short -o test.wasm -tags=arduino examples/blinky1
src/machine/board_pico2_ice.go
+173
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@@ -0,0 +1,173 @@
//go:build pico2_ice
// Most of the info is from
// https://pico2-ice.tinyvision.ai/md_pinout.html although
// (2025-09-07) RP4 appears twice in that pinout - the schematic is
// more clear. Consistent with other RPi boards, we use GPn instead of
// RPn to reference the RPi connected pins.
package machine
// GPIO pins
const (
GP0 = GPIO0
GP1 = GPIO1
GP2 = GPIO2
GP3 = GPIO3
GP4 = GPIO4
GP5 = GPIO5
GP6 = GPIO6
GP7 = GPIO7
GP8 = GPIO8
GP9 = GPIO9
GP10 = GPIO10
GP11 = GPIO11
GP12 = GPIO12
GP13 = GPIO13
GP14 = GPIO14
GP15 = GPIO15
GP16 = GPIO16
GP17 = GPIO17
GP18 = GPIO18
GP19 = GPIO19
GP20 = GPIO20
GP21 = GPIO21
GP22 = GPIO22
GP23 = GPIO23
GP24 = GPIO24
GP25 = GPIO25
GP26 = GPIO26
GP27 = GPIO27
GP28 = GPIO28
GP29 = GPIO29
GP30 = GPIO30
GP31 = GPIO31
GP32 = GPIO32
GP33 = GPIO33
GP34 = GPIO34
GP35 = GPIO35
GP36 = GPIO36
GP37 = GPIO37
GP38 = GPIO38
GP39 = GPIO39
GP40 = GPIO40
GP41 = GPIO41
GP42 = GPIO42
GP43 = GPIO43
GP44 = GPIO44
GP45 = GPIO45
GP46 = GPIO46
GP47 = GPIO47
// RPi pins shared with ICE. The ICE number is what appears on
// the board silkscreen.
ICE9 = GP28
ICE11 = GP29
ICE14 = GP7
ICE15 = GP6
ICE16 = GP5
ICE17 = GP4
ICE18 = GP27
ICE19 = GP23
ICE20 = GP22
ICE21 = GP26
ICE23 = GP25
ICE25 = GP30
ICE26 = GP24
ICE27 = GP20
// FPGA Clock pin.
ICE35_G0 = GP21
// Silkscreen & Pinout names
ICE_SSN = ICE16
ICE_SO = ICE14
ICE_SI = ICE17
ICE_CK = ICE15
SD = GP2
SC = GP3
FPGA_RSTN = GP31
A3 = GP32
A1 = GP33
A4 = GP34
A2 = GP35
B3 = GP36
B1 = GP37
B4 = GP38
B2 = GP39
N0 = GP40 // On the board these are labeled "~0"
N1 = GP41
N2 = GP42
N3 = GP43
N4 = GP44
N5 = GP45
N6 = GP46
// Functions from Schematic.
ICE_DONE = GP40
USB_BOOT = GP42
// Button
SW1 = GP42
BOOTSEL = GP42
// Tricolor LEDs
LED_RED = GP1
LED_GREEN = GP0
LED_BLUE = GP9
// Onboard LED
LED = LED_GREEN
// Onboard crystal oscillator frequency, in MHz.
xoscFreq = 12 // MHz
)
// This board does not define default i2c pins.
const (
I2C0_SDA_PIN = NoPin
I2C0_SCL_PIN = NoPin
I2C1_SDA_PIN = NoPin
I2C1_SCL_PIN = NoPin
)
// SPI default pins
const (
// Default Serial Clock Bus 0 for SPI communications
SPI0_SCK_PIN = GPIO18
// Default Serial Out Bus 0 for SPI communications
SPI0_SDO_PIN = GPIO19 // Tx
// Default Serial In Bus 0 for SPI communications
SPI0_SDI_PIN = GPIO16 // Rx
// Default Serial Clock Bus 1 for SPI communications
SPI1_SCK_PIN = GPIO10
// Default Serial Out Bus 1 for SPI communications
SPI1_SDO_PIN = GPIO11 // Tx
// Default Serial In Bus 1 for SPI communications
SPI1_SDI_PIN = GPIO12 // Rx
)
// UART pins
const (
UART0_TX_PIN = GPIO0
UART0_RX_PIN = GPIO1
UART1_TX_PIN = GPIO8
UART1_RX_PIN = GPIO9
UART_TX_PIN = UART0_TX_PIN
UART_RX_PIN = UART0_RX_PIN
)
var DefaultUART = UART0
// USB identifiers
const (
usb_STRING_PRODUCT = "Pico2"
usb_STRING_MANUFACTURER = "Raspberry Pi"
)
var (
usb_VID uint16 = 0x2E8A
usb_PID uint16 = 0x000A
)
src/machine/machine_rp2_2040.go
+25
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@@ -124,6 +124,31 @@ const (
fnXIP pinFunc = 0
)
// validPins confirms that the SPI pin selection is a legitimate one
// for the the 2040 chip.
func (spi *SPI) validPins(config SPIConfig) error {
var okSDI, okSDO, okSCK bool
switch spi.Bus {
case rp.SPI0:
okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
case rp.SPI1:
okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
}
switch {
case !okSDI:
return errSPIInvalidSDI
case !okSDO:
return errSPIInvalidSDO
case !okSCK:
return errSPIInvalidSCK
}
return nil
}
// Configure configures the gpio pin as per mode.
func (p Pin) Configure(config PinConfig) {
if p == NoPin {
src/machine/machine_rp2_2350a.go
+27
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@@ -2,6 +2,8 @@
package machine
import "device/rp"
// Analog pins on RP2350a.
const (
ADC0 Pin = GPIO26
@@ -12,3 +14,28 @@ const (
// fifth ADC channel.
thermADC = 30
)
// validPins confirms that the SPI pin selection is a legitimate one
// for the the 2350a chip.
func (spi *SPI) validPins(config SPIConfig) error {
var okSDI, okSDO, okSCK bool
switch spi.Bus {
case rp.SPI0:
okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
case rp.SPI1:
okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
}
switch {
case !okSDI:
return errSPIInvalidSDI
case !okSDO:
return errSPIInvalidSDO
case !okSCK:
return errSPIInvalidSCK
}
return nil
}
src/machine/machine_rp2_2350b.go
+27
View File
@@ -2,6 +2,8 @@
package machine
import "device/rp"
// RP2350B has additional pins.
const (
@@ -46,3 +48,28 @@ var (
PWM10 = getPWMGroup(10)
PWM11 = getPWMGroup(11)
)
// validPins confirms that the SPI pin selection is a legitimate one
// for the the 2350b chip.
func (spi *SPI) validPins(config SPIConfig) error {
var okSDI, okSDO, okSCK bool
switch spi.Bus {
case rp.SPI0:
okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20 || config.SDI == 32 || config.SDI == 36
okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23 || config.SDO == 35 || config.SDO == 39
okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22 || config.SCK == 34 || config.SCK == 38
case rp.SPI1:
okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28 || config.SDI == 40 || config.SDI == 44
okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27 || config.SDO == 31 || config.SDO == 43 || config.SDO == 47
okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26 || config.SCK == 30 || config.SCK == 42 || config.SCK == 46
}
switch {
case !okSDI:
return errSPIInvalidSDI
case !okSDO:
return errSPIInvalidSDO
case !okSCK:
return errSPIInvalidSCK
}
return nil
}
src/machine/machine_rp2_spi.go
+2 -20
View File
@@ -165,27 +165,9 @@ func (spi *SPI) Configure(config SPIConfig) error {
config.SDI = SPI1_SDI_PIN
}
}
var okSDI, okSDO, okSCK bool
switch spi.Bus {
case rp.SPI0:
okSDI = config.SDI == 0 || config.SDI == 4 || config.SDI == 16 || config.SDI == 20
okSDO = config.SDO == 3 || config.SDO == 7 || config.SDO == 19 || config.SDO == 23
okSCK = config.SCK == 2 || config.SCK == 6 || config.SCK == 18 || config.SCK == 22
case rp.SPI1:
okSDI = config.SDI == 8 || config.SDI == 12 || config.SDI == 24 || config.SDI == 28
okSDO = config.SDO == 11 || config.SDO == 15 || config.SDO == 27
okSCK = config.SCK == 10 || config.SCK == 14 || config.SCK == 26
if err := spi.validPins(config); err != nil {
return err
}
switch {
case !okSDI:
return errSPIInvalidSDI
case !okSDO:
return errSPIInvalidSDO
case !okSCK:
return errSPIInvalidSCK
}
if config.Frequency == 0 {
config.Frequency = defaultBaud
}
targets/pico2-ice.json
+11
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@@ -0,0 +1,11 @@
{
"inherits": [
"rp2350b"
],
"build-tags": ["pico2_ice"],
"serial-port": ["2e8a:000A"],
"default-stack-size": 8192,
"ldflags": [
"--defsym=__flash_size=4M"
]
}