feat: write RISC-V binary file with weakly linked, overridable symbols

- Adds functionality to write RISC-V binary files using weak symbols, allowing overrides in linked projects
- Supports flexible integration where default binary data can be replaced by custom definitions if needed

cx9261A_api/cx9261adriver.cpp

@@ -5,6 +5,17 @@
 #include "cx9261adriver.h"
 #include "utils.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+__attribute__((weak)) uint32_t CX9261A_RiscvBinLen = 0;
+__attribute__((weak)) uint8_t *CX9261A_RiscvBin = nullptr;
+
+#ifdef __cplusplus
+}
+#endif
+
 namespace CX9261A {
 
 void initialChip()
@@ -672,6 +683,9 @@ void configRISCV(const bool on)
     if (on) {
         writeSpi(0x071, 0x00);
         writeSpi(0x071, 0x29);
+        for (size_t i = 0; i < CX9261A_RiscvBinLen; i++) {
+            writeSpi(0x070, CX9261A_RiscvBin[i]);
+        }
         writeSpi(0x236, 0x0F);
         writeSpi(0x20A, 0x01);
         writeSpi(0x071, 0x26);