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serial: add writeBuf() and implement for USB.

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This lets USB send up to 32 bytes in a frame instead of 32 one byte
frames.  Add a fallback for drivers that don't implement writeBuf().

Signed-off-by: Michael Hope <mlhx@google.com>
This commit is contained in:
Michael Hope 2015-07-21 21:23:59 +02:00 • committed by borisbstyle
parent 75c86825f7
commit 96306ff9ab
6 changed files with 36 additions and 61 deletions
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9
src/main/drivers/serial.h
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@ -74,14 +74,13 @@ struct serialPortVTable {
void (*setMode)(serialPort_t *instance, portMode_t mode);
// Optional functions used to buffer large writes.
void (*beginWrite)(serialPort_t *instance);
void (*endWrite)(serialPort_t *instance);
void (*writeBuf)(serialPort_t *instance, void *data, int count);
};
void serialWrite(serialPort_t *instance, uint8_t ch);
uint8_t serialRxBytesWaiting(serialPort_t *instance);
uint8_t serialTxBytesFree(serialPort_t *instance);
void serialWriteBuf(serialPort_t *instance, void *data, int count);
uint8_t serialRead(serialPort_t *instance);
void serialSetBaudRate(serialPort_t *instance, uint32_t baudRate);
void serialSetMode(serialPort_t *instance, portMode_t mode);
@ -89,5 +88,5 @@ bool isSerialTransmitBufferEmpty(serialPort_t *instance);
void serialPrint(serialPort_t *instance, const char *str);
uint32_t serialGetBaudRate(serialPort_t *instance);
void serialBeginWrite(serialPort_t *instance);
void serialEndWrite(serialPort_t *instance);
// A shim that adapts the bufWriter API to the serialWriteBuf() API.
void serialWriteBufShim(void *instance, void *data, int count);