Merge pull request #391 from adafruit/update-ramdisk-with-start-stop

Update ramdisk with start stop

examples/MassStorage/msc_ramdisk/msc_ramdisk.ino

@@ -14,6 +14,7 @@
 // 8KB is the smallest size that windows allow to mount
 #define DISK_BLOCK_NUM  16
 #define DISK_BLOCK_SIZE 512
+
 #include "ramdisk.h"
 
 Adafruit_USBD_MSC usb_msc;
@@ -42,6 +43,10 @@ void setup() {
   TinyUSB_Device_Init(0);
 #endif
 
+#ifdef BTN_EJECT
+  pinMode(BTN_EJECT, activeState ? INPUT_PULLDOWN : INPUT_PULLUP);
+#endif
+
   // Set disk vendor id, product id and revision with string up to 8, 16, 4 characters respectively
   usb_msc.setID("Adafruit", "Mass Storage", "1.0");
 
@@ -50,33 +55,27 @@ void setup() {
 
   // Set callback
   usb_msc.setReadWriteCallback(msc_read_callback, msc_write_callback, msc_flush_callback);
+  usb_msc.setStartStopCallback(msc_start_stop_callback);
+  usb_msc.setReadyCallback(msc_ready_callback);
 
   // Set Lun ready (RAM disk is always ready)
   usb_msc.setUnitReady(true);
-
-#ifdef BTN_EJECT
-  pinMode(BTN_EJECT, activeState ? INPUT_PULLDOWN : INPUT_PULLUP);
-  usb_msc.setReadyCallback(msc_ready_callback);
-#endif
-
   usb_msc.begin();
 
   Serial.begin(115200);
-  //while ( !Serial ) delay(10);   // wait for native usb
+//  while ( !Serial ) delay(10);   // wait for native usb
 
   Serial.println("Adafruit TinyUSB Mass Storage RAM Disk example");
 }
 
-void loop()
-{
+void loop() {
   // nothing to do
 }
 
 // Callback invoked when received READ10 command.
 // Copy disk's data to buffer (up to bufsize) and
 // return number of copied bytes (must be multiple of block size)
-int32_t msc_read_callback (uint32_t lba, void* buffer, uint32_t bufsize)
-{
+int32_t msc_read_callback(uint32_t lba, void* buffer, uint32_t bufsize) {
   uint8_t const* addr = msc_disk[lba];
   memcpy(buffer, addr, bufsize);
 
@@ -86,8 +85,7 @@ int32_t msc_read_callback (uint32_t lba, void* buffer, uint32_t bufsize)
 // Callback invoked when received WRITE10 command.
 // Process data in buffer to disk's storage and
 // return number of written bytes (must be multiple of block size)
-int32_t msc_write_callback (uint32_t lba, uint8_t* buffer, uint32_t bufsize)
-{
+int32_t msc_write_callback(uint32_t lba, uint8_t* buffer, uint32_t bufsize) {
   uint8_t* addr = msc_disk[lba];
   memcpy(addr, buffer, bufsize);
 
@@ -96,18 +94,22 @@ int32_t msc_write_callback (uint32_t lba, uint8_t* buffer, uint32_t bufsize)
 
 // Callback invoked when WRITE10 command is completed (status received and accepted by host).
 // used to flush any pending cache.
-void msc_flush_callback (void)
-{
+void msc_flush_callback(void) {
   // nothing to do
 }
 
+bool msc_start_stop_callback(uint8_t power_condition, bool start, bool load_eject) {
+  Serial.printf("Start/Stop callback: power condition %u, start %u, load_eject %u\n", power_condition, start, load_eject);
+  return true;
+}
 
-#ifdef BTN_EJECT
 // Invoked when received Test Unit Ready command.
 // return true allowing host to read/write this LUN e.g SD card inserted
-bool msc_ready_callback(void)
-{
+bool msc_ready_callback(void) {
+  #ifdef BTN_EJECT
   // button not active --> medium ready
   return digitalRead(BTN_EJECT) != activeState;
+  #else
+  return true;
+  #endif
 }
-#endif