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Attempt to add availableForWrite() to USB Serial

This commit is contained in:
Roger Clark 2018-05-27 16:26:19 +10:00
parent 9b37bc761b
commit 141bcd2ad1
3 changed files with 10 additions and 0 deletions
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5
STM32F1/cores/maple/libmaple/usb/stm32f1/usb_cdcacm.c
View File

@ -456,6 +456,11 @@ uint8 usb_cdcacm_is_transmitting(void) {
return ( transmitting>0 ? transmitting : 0);
}
int usb_cdcacm_tx_available()
{
return CDC_SERIAL_TX_BUFFER_SIZE - usb_cdcacm_get_pending();
}
uint16 usb_cdcacm_get_pending(void) {
return (tx_head - tx_tail) & CDC_SERIAL_TX_BUFFER_SIZE_MASK;
}

2
STM32F1/cores/maple/usb_serial.cpp
View File

@ -148,6 +148,8 @@ int USBSerial::peek(void)
}
}
int USBSerial::availableForWrite(void) { return usb_cdcacm_tx_available(); }
void USBSerial::flush(void)
{
/*Roger Clark. Rather slow method. Need to improve this */

3
STM32F1/system/libmaple/include/libmaple/usb_cdcacm.h
View File

@ -129,10 +129,13 @@ uint32 usb_cdcacm_peek_ex(uint8* buf, uint32 offset, uint32 len);
uint32 usb_cdcacm_data_available(void); /* in RX buffer */
uint16 usb_cdcacm_get_pending(void);
uint8 usb_cdcacm_is_transmitting(void);
int usb_cdcacm_tx_available();
uint8 usb_cdcacm_get_dtr(void);
uint8 usb_cdcacm_get_rts(void);
typedef struct usb_cdcacm_line_coding {
uint32 dwDTERate; /* Baud rate */