HAL_Linux: cope with systems without I2C_RDRW_IOCTL_MAX_MSGS

such as my ubuntu 14.04 laptop :-)
2015-05-05 21:42:14 +10:00 · 2015-05-05 21:42:14 +10:00 · b09fcfc20e
commit b09fcfc20e
parent 6a8da06d19
1 changed files with 4 additions and 0 deletions
--- a/libraries/AP_HAL_Linux/I2CDriver.cpp
+++ b/libraries/AP_HAL_Linux/I2CDriver.cpp
@ -174,7 +174,11 @@ uint8_t LinuxI2CDriver::readRegistersMultiple(uint8_t addr, uint8_t reg,
                                              uint8_t len, 
                                              uint8_t count, uint8_t* data)
 {
+#ifdef I2C_RDRW_IOCTL_MAX_MSGS
    const uint8_t max_count = I2C_RDRW_IOCTL_MAX_MSGS / 2;
+#else
+    const uint8_t max_count = 8;
+#endif

    if (_fd == -1) {
        return 1;