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AP_CANManager: add and use a "bool read(c)" method to AP_HAL

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this is much less likely to not work vs the int16_t equivalent
This commit is contained in:
Peter Barker 2023-02-21 20:35:57 +11:00 committed by Peter Barker
parent 75b3cec196
commit 14089d4919
1 changed files with 3 additions and 3 deletions
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6
libraries/AP_CANManager/AP_SLCANIface.cpp
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@ -721,11 +721,11 @@ int16_t SLCAN::CANIface::receive(AP_HAL::CANFrame& out_frame, uint64_t& rx_time,
uint32_t num_bytes = _port->available_locked(_serial_lock_key); uint32_t num_bytes = _port->available_locked(_serial_lock_key);
// flush bytes from port // flush bytes from port
while (num_bytes--) { while (num_bytes--) {
int16_t ret = _port->read_locked(_serial_lock_key); uint8_t b;
if (ret < 0) { if (!_port->read_locked(_serial_lock_key, b)) {
break; break;
} }
addByte(ret); addByte(b);
if (!rx_queue_.space()) { if (!rx_queue_.space()) {
break; break;
} }