From 29fadc241762aab9748a0afb93ac203467a8ecb8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Patrick=20Jos=C3=A9=20Pereira?= Date: Wed, 25 Sep 2019 11:34:56 -0300 Subject: [PATCH] AP_HAL_Linux: PCA9685: Check for device before accessing it MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Patrick José Pereira --- libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp b/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp index a5ce8dbe9c..8364932efb 100644 --- a/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp +++ b/libraries/AP_HAL_Linux/RCOutput_PCA9685.cpp @@ -96,7 +96,7 @@ void RCOutput_PCA9685::init() void RCOutput_PCA9685::reset_all_channels() { - if (!_dev->get_semaphore()->take(10)) { + if (!_dev || !_dev->get_semaphore()->take(10)) { return; } @@ -117,7 +117,7 @@ void RCOutput_PCA9685::set_freq(uint32_t chmask, uint16_t freq_hz) write(i, _pulses_buffer[i]); } - if (!_dev->get_semaphore()->take(10)) { + if (!_dev || !_dev->get_semaphore()->take(10)) { return; } @@ -225,7 +225,7 @@ void RCOutput_PCA9685::push() *d++ = length >> 8; } - if (!_dev->get_semaphore()->take_nonblocking()) { + if (!_dev || !_dev->get_semaphore()->take_nonblocking()) { return; }