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platform: serial: add bytesAvailable() function

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This commit is contained in:
Jacob Dahl
2025-07-28 20:16:13 -08:00
committed by Jacob Dahl
parent 61e741e7d0
commit b5bf28c204
8 changed files with 40 additions and 0 deletions
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platforms/posix/include/SerialImpl.hpp
+1
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@@ -59,6 +59,7 @@ public:
bool close();
ssize_t bytesAvailable();
ssize_t read(uint8_t *buffer, size_t buffer_size);
ssize_t readAtLeast(uint8_t *buffer, size_t buffer_size, size_t character_count = 1, uint32_t timeout_us = 0);
platforms/posix/src/px4/common/SerialImpl.cpp
+12
View File
@@ -251,6 +251,18 @@ bool SerialImpl::close()
return true;
}
ssize_t SerialImpl::bytesAvailable()
{
if (!_open) {
PX4_ERR("Device not open!");
return -1;
}
ssize_t bytes_available = 0;
int ret = ioctl(_serial_fd, FIONREAD, &bytes_available);
return ret >= 0 ? bytes_available : 0;
}
ssize_t SerialImpl::read(uint8_t *buffer, size_t buffer_size)
{
if (!_open) {