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AP_HAL_ChibiOS: override read(buffer,count) method to be more efficient

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This commit is contained in:
Peter Barker 2020-05-21 15:19:45 +10:00 committed by Peter Barker
parent d259c03079
commit 6d9e563ede
2 changed files with 22 additions and 0 deletions
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21
libraries/AP_HAL_ChibiOS/UARTDriver.cpp
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@ -582,6 +582,27 @@ bool UARTDriver::discard_input()
return true;
}
ssize_t UARTDriver::read(uint8_t *buffer, uint16_t count)
{
if (lock_read_key != 0 || _uart_owner_thd != chThdGetSelfX()){
return -1;
}
if (!_initialised) {
return -1;
}
const uint32_t ret = _readbuf.read(buffer, count);
if (ret == 0) {
return 0;
}
if (!_rts_is_active) {
update_rts_line();
}
return ret;
}
int16_t UARTDriver::read()
{
if (lock_read_key != 0 || _uart_owner_thd != chThdGetSelfX()){

1
libraries/AP_HAL_ChibiOS/UARTDriver.h
View File

@ -44,6 +44,7 @@ public:
uint32_t available() override;
uint32_t txspace() override;
int16_t read() override;
ssize_t read(uint8_t *buffer, uint16_t count) override;
int16_t read_locked(uint32_t key) override;
void _timer_tick(void) override;