fixes for lm4f

hw/lm4f-utft-sd.h

@@ -1,6 +1,7 @@
 // TFT display...
 // NOTE: edit memorysaver.h to select the correct chip for your display!
 // Daniel Rebollo's boosterpack
+#define USE_UTFT
 #define TFT_BACKLIGHT	PD_6
 #define TFT_MODEL	SSD1289
 #define TFT_RS		PC_6

sdtape.cpp

@@ -25,7 +25,7 @@ bool sdtape::start(const char *programs)
 #if defined(ESP8266)
 	SPIFFS.begin();
 	dir = SPIFFS.openDir("/");
-#else if defined(DISK)
+#elif defined(DISK)
 	dir = DISK.open(programs);
 	if (!dir)
 		return false;

sound_pwm.cpp

@@ -40,7 +40,7 @@ void PWM::set_freq(unsigned freq) {
       ESP_ERROR_CHECK(::ledc_set_freq(SPEED_MODE, TIMER, freq));
 }
 
-#else
+#elif defined(PWM_SOUND)
 static unsigned pin;
 
 void PWM::begin(unsigned gpio) {
@@ -59,4 +59,18 @@ void PWM::stop() {
 void PWM::set_freq(unsigned freq) {
 	analogWriteFreq(freq);
 }
+
+#else
+
+void PWM::begin(unsigned gpio) {
+}
+
+void PWM::set_duty(unsigned duty) {
+}
+
+void PWM::stop() {
+}
+
+void PWM::set_freq(unsigned freq) {
+}
 #endif