fix(spi): Correct SPI mapping for ESP32S2

Author: Jason2866

libraries/SPI/src/SPI.cpp

@@ -63,9 +63,9 @@ SPIClass::~SPIClass() {
 #endif
 }
 
-void SPIClass::begin(int8_t sck, int8_t miso, int8_t mosi, int8_t ss) {
+bool SPIClass::begin(int8_t sck, int8_t miso, int8_t mosi, int8_t ss) {
   if (_spi) {
-    return;
+    return true;
   }
 
   if (!_div) {
@@ -74,7 +74,8 @@ void SPIClass::begin(int8_t sck, int8_t miso, int8_t mosi, int8_t ss) {
 
   _spi = spiStartBus(_spi_num, _div, SPI_MODE0, SPI_MSBFIRST);
   if (!_spi) {
-    return;
+    log_e("SPI bus %d start failed.", _spi_num);
+    return false;
   }
 
   if (sck == -1 && miso == -1 && mosi == -1 && ss == -1) {
@@ -110,10 +111,11 @@ void SPIClass::begin(int8_t sck, int8_t miso, int8_t mosi, int8_t ss) {
   if (_mosi >= 0 && !spiAttachMOSI(_spi, _mosi)) {
     goto err;
   }
-  return;
+  return true;
 
 err:
   log_e("Attaching pins to SPI failed.");
+  return false;
 }
 
 void SPIClass::end() {