PICO: Update platform and target setup

- add a misc_todo.c stub file to manage what needs to be done / rectified.

src/platform/PICO/misc_todo.c

@@ -0,0 +1,73 @@
+#include "drivers/bus_spi.h"
+
+void spiPinConfigure(const struct spiPinConfig_s *pConfig)
+{
+    UNUSED(pConfig);
+}
+
+void debugInit(void)
+{
+    // NOOP
+}
+
+int _open(const char *fn, int oflag, ...)
+{
+    UNUSED(fn);
+    UNUSED(oflag);
+    return -1;
+}
+
+int _close(int fd)
+{
+    UNUSED(fd);
+    return -1;
+}
+
+int _lseek(int fd, int pos, int whence)
+{
+    UNUSED(fd);
+    UNUSED(pos);
+    UNUSED(whence);
+    return -1;
+}
+
+int _fstat(int fd, char *buf)
+{
+    UNUSED(fd);
+    UNUSED(buf);
+    return -1;
+}
+
+int _isatty(int fd)
+{
+    UNUSED(fd);
+    return -1;
+}
+
+int _getpid(void)
+{
+    return 0;
+}
+
+int _kill(int pid, int sig)
+{
+    UNUSED(pid);
+    UNUSED(sig);
+    return -1;
+}
+
+int _read(int handle, char *buffer, int length)
+{
+    UNUSED(handle);
+    UNUSED(buffer);
+    UNUSED(length);
+    return -1;
+}
+
+int _write(int handle, char *buffer, int length)
+{
+    UNUSED(handle);
+    UNUSED(buffer);
+    UNUSED(length);
+    return -1;
+}

src/platform/PICO/mk/PICO.mk

@@ -14,7 +14,6 @@ CMSIS_DIR      := $(SDK_DIR)/rp2_common/cmsis/stub/CMSIS
 #STDPERIPH
 STDPERIPH_DIR  := $(SDK_DIR)/rp2_common
 STDPERIPH_SRC  := \
-            pico_clib_interface/newlib_interface.c \
             hardware_sync_spin_lock/sync_spin_lock.c \
             hardware_gpio/gpio.c \
             pico_stdio/stdio.c \
@@ -28,7 +27,8 @@ STDPERIPH_SRC  := \
             hardware_adc/adc.c \
             hardware_pio/pio.c \
             hardware_watchdog/watchdog.c \
-            hardware_flash/flash.c
+            hardware_flash/flash.c \
+            pico_unique_id/unique_id.c
 
 VPATH := $(VPATH):$(STDPERIPH_DIR)
 
@@ -180,10 +180,15 @@ MCU_COMMON_SRC = \
             drivers/dshot_bitbang_decode.c \
             drivers/inverter.c \
             drivers/bus_spi.c \
+            drivers/bus_spi_config.c \
+            drivers/serial_pinconfig.c \
+            drivers/serial_uart_pinconfig.c \
+            PICO/misc_todo.c \
             PICO/system.c \
             PICO/io_pico.c \
             PICO/bus_spi_pico.c \
             PICO/serial_uart_pico.c \
+            PICO/exti_pico.c \
             PICO/config_flash.c
 
 DEVICE_FLAGS +=

src/platform/PICO/platform_mcu.h

@@ -54,7 +54,7 @@ typedef enum {DISABLE = 0, ENABLE = !DISABLE} FunctionalState;
 #define DMA_TypeDef          void*
 //#define DMA_InitTypeDef
 //#define DMA_Channel_TypeDef
-#define SPI_TypeDef          spi_inst_t
+#define SPI_TypeDef          SPI0_Type
 #define ADC_TypeDef          void*
 #define USART_TypeDef        uart_inst_t
 #define TIM_OCInitTypeDef    void*
@@ -99,3 +99,5 @@ extern uint32_t systemUniqueId[3];
 #define U_ID_1 (systemUniqueId[1])
 #define U_ID_2 (systemUniqueId[2])
 
+#define UART_TX_BUFFER_ATTRIBUTE
+#define UART_RX_BUFFER_ATTRIBUTE

src/platform/PICO/target/RP2350B/target.h

@@ -37,10 +37,10 @@
 #define USE_UART0
 #define USE_UART1
 
-//#define USE_SPI
-//#define USE_SPI_DEVICE_0
-//#define USE_SPI_DEVICE_1
-#undef USE_SPI
+#define USE_SPI
+#define USE_SPI_DEVICE_0
+#define USE_SPI_DEVICE_1
+//#undef USE_SPI
 
 #undef USE_SOFTSERIAL1
 #undef USE_SOFTSERIAL2
@@ -70,8 +70,6 @@
 #undef USE_MULTI_GYRO
 #undef USE_BARO
 
-
-
 #undef USE_RANGEFINDER_HCSR04
 #undef USE_CRSF
 #undef USE_TELEMETRY_CRSF
@@ -117,6 +115,18 @@
 #undef USE_FLASH_PY25Q128HA
 #undef USE_FLASH_W25Q64FV
 
+#undef USE_RPM_LIMIT
+
+#undef USE_SERVOS
+#undef USE_LED_STRIP
+#undef USE_OSD
+#undef USE_OSD_SD
+#undef USE_OSD_HD
+#undef USE_OSD_QUICK_MENU
+#undef USE_GPS
+#undef USE_POSITION_HOLD
+
+
 //#define FLASH_PAGE_SIZE                     0x1
 #define CONFIG_IN_FLASH
 
@@ -144,7 +154,7 @@
 
 #define MAX7456_SPI_INSTANCE SPI1
 #define SDCARD_SPI_INSTANCE  SPI1
-//#define GYRO_1_SPI_INSTANCE  SPI0
+#define GYRO_1_SPI_INSTANCE  SPI0
 
 #define USE_GYRO
 #define USE_GYRO_SPI_ICM42688P
@@ -210,3 +220,12 @@ I2C0_SCL        P45
 SPARE3          P47
 
 */
+
+#define SPIDEV_COUNT 2
+#define UART_RX_BUFFER_SIZE 1024
+#define UART_TX_BUFFER_SIZE 1024
+
+#define UARTHARDWARE_MAX_PINS 4
+#define UART_TRAIT_AF_PORT 1
+
+#define MAX_SPI_PIN_SEL 4