PICO: Adding RP2350A MCU (#14437)

- allow for provision of libc
- correction for unused function in msp

src/main/build/build_config.h

@@ -63,6 +63,7 @@ typedef enum {
     MCU_TYPE_APM32F405,
     MCU_TYPE_APM32F407,
     MCU_TYPE_AT32F435M,
+    MCU_TYPE_RP2350A,
     MCU_TYPE_RP2350B,
     MCU_TYPE_COUNT,
     MCU_TYPE_UNKNOWN = 255,

src/main/common/strtol.c

@@ -30,6 +30,7 @@
 
 #define _STRTO_ENDPTR 1
 
+#if PLATFORM_NO_LIBC
 static unsigned long _strto_l(const char * str, char ** endptr, int base, int sflag)
 {
     unsigned long number, cutoff;
@@ -127,6 +128,7 @@ unsigned long strtoul(const char * str, char ** endptr, int base)
 {
     return _strto_l(str, endptr, base, 0);
 }
+#endif
 
 int atoi(const char *str)
 {

src/main/msp/msp.c

@@ -289,6 +289,9 @@ static void mspSerialPassthroughFn(serialPort_t *serialPort)
 
 static void mspFcSetPassthroughCommand(sbuf_t *dst, sbuf_t *src, mspPostProcessFnPtr *mspPostProcessFn)
 {
+#ifndef USE_SERIAL_PASSTHROUGH
+    UNUSED(mspPostProcessFn);
+#endif
     const unsigned int dataSize = sbufBytesRemaining(src);
     if (dataSize == 0) {
         // Legacy format
@@ -311,8 +314,6 @@ static void mspFcSetPassthroughCommand(sbuf_t *dst, sbuf_t *src, mspPostProcessF
             sbufWriteU8(dst, 0);
         }
         break;
-#else
-    UNUSED(mspPostProcessFn);
 #endif
 #ifdef USE_SERIAL_4WAY_BLHELI_INTERFACE
     case MSP_PASSTHROUGH_ESC_4WAY:

src/main/target/common_post.h

@@ -39,6 +39,10 @@
 
 */
 
+#ifndef PLATFORM_NO_LIBC
+#define PLATFORM_NO_LIBC 1
+#endif
+
 #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
 #define DEFAULT_AUX_CHANNEL_COUNT       MAX_AUX_CHANNEL_COUNT
 #else