Reduce compile warnings for Arduino Nano Every

#19

Author: nseidle

src/SparkFun_External_EEPROM.cpp

@@ -166,7 +166,7 @@ void ExternalEEPROM::read(uint32_t eepromLocation, uint8_t *buff, uint16_t buffe
     settings.i2cPort->write((uint8_t)((eepromLocation + received) & 0xFF)); // LSB
     settings.i2cPort->endTransmission();
 
-    settings.i2cPort->requestFrom((uint8_t)i2cAddress, (uint8_t)amtToRead);
+    settings.i2cPort->requestFrom((uint8_t)i2cAddress, (size_t)amtToRead);
 
     for (uint16_t x = 0; x < amtToRead; x++)
       buff[received + x] = settings.i2cPort->read();
@@ -190,7 +190,7 @@ void ExternalEEPROM::write(uint32_t eepromLocation, const uint8_t *dataToWrite,
   if (eepromLocation + bufferSize >= settings.memorySize_bytes)
     bufferSize = settings.memorySize_bytes - eepromLocation;
 
-  uint16_t maxWriteSize = settings.pageSize_bytes;
+  int16_t maxWriteSize = settings.pageSize_bytes;
   if (maxWriteSize > I2C_BUFFER_LENGTH_TX - 2)
     maxWriteSize = I2C_BUFFER_LENGTH_TX - 2; //Arduino has 32 byte limit. We loose two to the EEPROM address
 

src/SparkFun_External_EEPROM.h

@@ -141,7 +141,7 @@ class ExternalEEPROM
   struct_memorySettings settings = {
       .i2cPort = &Wire,
       .deviceAddress = 0b1010000, 			// 0x50; format is 0b1010 + (A2 A1 A0) or 0b1010 + (B0 A1 A0) for larger (>512kbit) EEPROMs
-      .memorySize_bytes = 512 * 1024 / 8,	// equals 64 KB
+      .memorySize_bytes = (uint32_t)512 * 1024 / 8,	// equals 64 KB
       .pageSize_bytes = 64,
       .pageWriteTime_ms = 5,
       .pollForWriteComplete = true