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Remark from projectkk2glider taken into account

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Serial2 connection and USB CDC output now waits there is some free space
before adding anything to the buffer
This commit is contained in:
Bertrand Songis
2015-08-27 14:38:47 +02:00
parent 330a91441a
commit 5d7f55fa97
6 changed files with 26 additions and 14 deletions
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radio/src/targets/taranis/usbd_cdc.cpp
+11 -3
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@@ -50,6 +50,7 @@ extern uint8_t APP_Rx_Buffer []; /* Write CDC received data in this buffer.
extern uint32_t APP_Rx_ptr_in; /* Increment this pointer or roll it back to
start address when writing received data
in the buffer APP_Rx_Buffer. */
extern uint32_t APP_Rx_ptr_out;
/* Private function prototypes -----------------------------------------------*/
static uint16_t VCP_Init (void);
@@ -161,16 +162,23 @@ void usbSerialPutc(uint8_t c)
{
if (!cdcConnected) return;
uint32_t APP_Rx_length;
do {
APP_Rx_length = APP_RX_DATA_SIZE + APP_Rx_ptr_in - APP_Rx_ptr_out;
if (APP_Rx_length >= APP_RX_DATA_SIZE) {
APP_Rx_length -= APP_RX_DATA_SIZE;
}
} while (APP_Rx_length == APP_RX_DATA_SIZE-1);
APP_Rx_Buffer[APP_Rx_ptr_in] = c;
++charsWritten;
/* To avoid buffer overflow */
if(APP_Rx_ptr_in >= APP_RX_DATA_SIZE-1)
{
if (APP_Rx_ptr_in >= APP_RX_DATA_SIZE-1) {
APP_Rx_ptr_in = 0;
++usbWraps;
}
else {
APP_Rx_ptr_in++;
APP_Rx_ptr_in++;
}
}