Fix for STM32F105 startup hang

Globals.h

@@ -97,6 +97,12 @@ const uint16_t RX_BLOCK_SIZE = 2U;
 const uint16_t TX_RINGBUFFER_SIZE = 500U;
 const uint16_t RX_RINGBUFFER_SIZE = 600U;
 
+#if defined(STM32F105xC)
+const uint16_t TX_BUFFER_LEN = 2000U;
+#else
+const uint16_t TX_BUFFER_LEN = 4000U;
+#endif
+
 extern MMDVM_STATE m_modemState;
 
 extern bool m_dstarEnable;

NXDNTX.cpp

@@ -45,7 +45,7 @@ const uint8_t NXDN_PREAMBLE[] = {0x57U, 0x75U, 0xFDU};
 const uint8_t NXDN_SYNC = 0x5FU;
 
 CNXDNTX::CNXDNTX() :
-m_buffer(4000U),
+m_buffer(TX_BUFFER_LEN),
 m_modFilter(),
 m_sincFilter(),
 m_modState(),

P25TX.cpp

@@ -43,7 +43,7 @@ const q15_t P25_LEVELD = -1260;
 const uint8_t P25_START_SYNC = 0x77U;
 
 CP25TX::CP25TX() :
-m_buffer(4000U),
+m_buffer(TX_BUFFER_LEN),
 m_modFilter(),
 m_lpFilter(),
 m_modState(),

SerialRB.h

@@ -32,7 +32,11 @@ Boston, MA  02110-1301, USA.
 #include <Arduino.h>
 #endif
 
+#if defined(STM32F105xC)
+const uint16_t SERIAL_RINGBUFFER_SIZE = 370U;
+#else
 const uint16_t SERIAL_RINGBUFFER_SIZE = 1000U;
+#endif
 
 class CSerialRB {
 public:

YSFTX.cpp

@@ -44,7 +44,7 @@ const uint8_t YSF_END_SYNC   = 0xFFU;
 const uint8_t YSF_HANG       = 0x00U;
 
 CYSFTX::CYSFTX() :
-m_buffer(4000U),
+m_buffer(TX_BUFFER_LEN),
 m_modFilter(),
 m_modState(),
 m_poBuffer(),