Second attempt to add availableForWrite() to USB Serial

rogerclarkmelbourne · rogerclarkmelbourne · commit 4db3994d1c42 · 2018-05-27T16:35:06.000+10:00
diff --git a/STM32F1/cores/maple/libmaple/usb/stm32f1/usb_cdcacm.c b/STM32F1/cores/maple/libmaple/usb/stm32f1/usb_cdcacm.c
@@ -458,7 +458,7 @@ uint8 usb_cdcacm_is_transmitting(void) {
 
 int usb_cdcacm_tx_available()
 {
-	return CDC_SERIAL_TX_BUFFER_SIZE - usb_cdcacm_get_pending();
+	return CDC_SERIAL_TX_BUFFER_SIZE - usb_cdcacm_get_pending() - 1;
 }
 
 uint16 usb_cdcacm_get_pending(void) {

Original file line number	Diff line number	Diff line change
`@@ -458,7 +458,7 @@ uint8 usb_cdcacm_is_transmitting(void) {`
`458`	`458`
`459`	`459`	`int usb_cdcacm_tx_available()`
`460`	`460`	`{`
`461`		`- return CDC_SERIAL_TX_BUFFER_SIZE - usb_cdcacm_get_pending();`
	`461`	`+ return CDC_SERIAL_TX_BUFFER_SIZE - usb_cdcacm_get_pending() - 1;`
`462`	`462`	`}`
`463`	`463`
`464`	`464`	`uint16 usb_cdcacm_get_pending(void) {`