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Audit RTCPRE Shift and Mask Values

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L0 - RTC Prescaler appears in RCC_CR, bit 20, 2 bits wide (RM0367 Rev 2)
L1 - RTC Prescaler appears in RCC_CR, bit 29, 2 bits wide (RM0038 Rev 10)
F0 - no prescaler setting (RM0091 Rev 7)
F1 - no prescaler setting (RM0041 Rev 4)
F2 - RTC Prescaler appears at RCC_CFGR, bit 16, 4 bits wide (RM0033 Rev 6)
F3 - no prescaler setting (RM0316 Rev 3)
F4 - RTC Prescaler appears at RCC_CFGR, bit 16, 4 bits wide (RM0090 Rev 8)
This commit is contained in:
Chuck McManis
2014-12-14 14:59:14 -08:00
parent 9ddfcb0e53
commit 14ad92015e
4 changed files with 16 additions and 10 deletions
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3
include/libopencm3/stm32/l1/rcc.h
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@@ -69,7 +69,8 @@
/* --- RCC_CR values ------------------------------------------------------- */
/* RTCPRE[1:0] at 30:29 */
#define RCC_CR_RTCPRE_SHIFT 29
#define RCC_CR_RTCPRE_MASK 0x3
#define RCC_CR_CSSON (1 << 28)
#define RCC_CR_PLLRDY (1 << 25)
#define RCC_CR_PLLON (1 << 24)