mbed library sources
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Revision 137:f9a97811e98c, committed 2014-03-25
- Comitter:
- mbed_official
- Date:
- Tue Mar 25 13:45:07 2014 +0000
- Parent:
- 136:f4bb33e41288
- Child:
- 138:ec7ee4660c49
- Commit message:
- Synchronized with git revision 8b4f07882b14f6152ee6d3e1c72b548d6f340650
Full URL: https://github.com/mbedmicro/mbed/commit/8b4f07882b14f6152ee6d3e1c72b548d6f340650/
[NUCLEO_F302R8] Fix issue with SystemCoreClock variable update.
Changed in this revision
--- a/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/TOOLCHAIN_ARM_MICRO/stm32f302x8.sct Tue Mar 25 11:45:07 2014 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/TOOLCHAIN_ARM_MICRO/stm32f302x8.sct Tue Mar 25 13:45:07 2014 +0000 @@ -37,7 +37,8 @@ } ; 98 vectors (16 core + 82 peripheral) * 4 bytes = 392 bytes to reserve (0x188) - RW_IRAM1 (0x20000000+0x188) (0x4000-0x188) { ; RW data + ; + 4 more bytes reserved for the SystemCoreClock variable + RW_IRAM1 (0x20000000+(0x188+4)) (0x4000-(0x188+4)) { ; RW data .ANY (+RW +ZI) }
--- a/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/TOOLCHAIN_ARM_STD/stm32f302x8.sct Tue Mar 25 11:45:07 2014 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/TOOLCHAIN_ARM_STD/stm32f302x8.sct Tue Mar 25 13:45:07 2014 +0000 @@ -37,7 +37,8 @@ } ; 98 vectors (16 core + 82 peripheral) * 4 bytes = 392 bytes to reserve (0x188) - RW_IRAM1 (0x20000000+0x188) (0x4000-0x188) { ; RW data + ; + 4 more bytes reserved for the SystemCoreClock variable + RW_IRAM1 (0x20000000+(0x188+4)) (0x4000-(0x188+4)) { ; RW data .ANY (+RW +ZI) }
--- a/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/system_stm32f30x.c Tue Mar 25 11:45:07 2014 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/system_stm32f30x.c Tue Mar 25 13:45:07 2014 +0000 @@ -141,7 +141,10 @@ * @{ */ -uint32_t SystemCoreClock = 64000000; /* Default with HSI. Will be updated if HSE is used */ +// [TODO] Do the same for other compilers +// Warning: the RAM is initialized AFTER the SetSysClock function is called. +// This variable must be placed outside the initialized section (see scatter file). +uint32_t SystemCoreClock __attribute__((at(0x20000188))) = 64000000; /* Default with HSI. Will be updated if HSE is used */ __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; @@ -208,16 +211,16 @@ /* Disable all interrupts */ RCC->CIR = 0x00000000; + /* Configure the System clock source, PLL Multiplier and Divider factors, + AHB/APBx prescalers and Flash settings */ + SetSysClock(); + /* Configure the Vector Table location add offset address ------------------*/ #ifdef VECT_TAB_SRAM SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ #else SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ #endif - - /* Configure the System clock source, PLL Multiplier and Divider factors, - AHB/APBx prescalers and Flash settings */ - SetSysClock(); } /** @@ -330,9 +333,6 @@ } } } - - /* Update SystemCoreClock variable */ - SystemCoreClockUpdate(); /* Output SYSCLK on MCO pin(PA8) for debugging purpose */ /* @@ -411,7 +411,8 @@ while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)RCC_CFGR_SWS_PLL) { } - + + SystemCoreClock = 72000000; return 1; // OK } else @@ -459,6 +460,7 @@ { } + SystemCoreClock = 64000000; return 1; // OK }