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AP_HAL_Linux: 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 394d70abe0
commit a10f5dbd0a
2 changed files with 5 additions and 6 deletions
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9
libraries/AP_HAL_Linux/UARTDriver.cpp
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@ -281,18 +281,17 @@ uint32_t UARTDriver::txspace()
return _writebuf.space(); return _writebuf.space();
} }
int16_t UARTDriver::read() bool UARTDriver::read(uint8_t &byte)
{ {
if (!_initialised) { if (!_initialised) {
return -1; return false;
} }
uint8_t byte;
if (!_readbuf.read_byte(&byte)) { if (!_readbuf.read_byte(&byte)) {
return -1; return false;
} }
return byte; return true;
} }
bool UARTDriver::discard_input() bool UARTDriver::discard_input()

2
libraries/AP_HAL_Linux/UARTDriver.h
View File

@ -29,7 +29,7 @@ public:
/* Linux implementations of Stream virtual methods */ /* Linux implementations of Stream virtual methods */
uint32_t available() override; uint32_t available() override;
uint32_t txspace() override; uint32_t txspace() override;
int16_t read() override; bool read(uint8_t &b) override WARN_IF_UNUSED;
bool discard_input() override; bool discard_input() override;