Fixed bug #1029.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@12789 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

os/hal/ports/STM32/STM32F4xx/stm32_rcc.h

@@ -429,14 +429,22 @@
  *
  * @api
  */
+#ifdef RCC_AHB1ENR_BKPSRAMEN
 #define rccEnableBKPSRAM(lp) rccEnableAHB1(RCC_AHB1ENR_BKPSRAMEN, lp)
+#else
+#define rccEnableBKPSRAM(lp)
+#endif
 
 /**
  * @brief   Disables the BKPSRAM peripheral clock.
  *
  * @api
  */
+#ifdef RCC_AHB1ENR_BKPSRAMEN
 #define rccDisableBKPSRAM() rccDisableAHB1(RCC_AHB1ENR_BKPSRAMEN)
+#else
+#define rccDisableBKPSRAM()
+#endif
 /** @} */
 
 /**

readme.txt

@@ -94,6 +94,8 @@
 - HAL: Added a new interface for range-finder devices (used by EX).
 - HAL: Added mcuconf.h updater tool for STM32F407 (backported to 19.1.1).
 - NIL: Integrated NIL 4.0.
+- FIX: Fixed RCC_AHB1ENR_BKPSRAMEN not present in all STMF4xx devices
+       (bug #1029)(backported to 19.1.3)(backported to 18.2.3).
 - FIX: Fixed MPU fix #1027 broke stack checking on Cortex-M devices without
        MPU (bug #1028)(backported to 19.1.3)(backported to 18.2.3).
 - FIX: Fixed MPU setup missing on thread start (bug #1027)