Merge pull request #355 from FrankBoesing/save-ram-with-progmem

Startup: save RAM with .progmem

teensy4/AudioStream.cpp

@@ -54,6 +54,7 @@ void software_isr(void);
 
 // Set up the pool of audio data blocks
 // placing them all onto the free list
+__attribute__((section(".progmem")))
 void AudioStream::initialize_memory(audio_block_t *data, unsigned int num)
 {
 	unsigned int i;

teensy4/analog.c

@@ -115,6 +115,7 @@ void analogReadAveraging(unsigned int num)
 
 #define MAX_ADC_CLOCK 20000000
 
+__attribute__((section(".progmem")))
 void analog_init(void)
 {
 	uint32_t mode, avg=0;

teensy4/tempmon.c

@@ -11,6 +11,7 @@ static uint32_t panicAlarmTemp  = 90U;
 static uint32_t s_hotTemp, s_hotCount, s_roomC_hotC;
 static float s_hot_ROOM;
 
+__attribute__((section(".progmem")))
 void tempmon_init(void)
 {
   // Notes:

teensy4/usb.c

@@ -83,7 +83,7 @@ static void endpoint0_complete(void);
 
 
 
-
+__attribute__((section(".progmem")))
 void usb_init(void)
 {
 	// TODO: only enable when VBUS detected