28 строки
815 Б
Go
28 строки
815 Б
Go
//go:build stm32f4 && stm32f469
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package runtime
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import "device/stm32"
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/*
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clock settings
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+-------------+--------+
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| HSE | 8mhz |
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| SYSCLK | 180mhz |
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| HCLK | 180mhz |
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| APB2(PCLK2) | 90mhz |
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| APB1(PCLK1) | 45mhz |
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+-------------+--------+
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*/
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const (
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HSE_STARTUP_TIMEOUT = 0x0500
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// PLL Options - See RM0386 Reference Manual pg. 148
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PLL_M = 8 // PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N
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PLL_N = 360
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PLL_P = 2 // SYSCLK = PLL_VCO / PLL_P
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PLL_Q = 7 // USB OTS FS, SDIO and RNG Clock = PLL_VCO / PLL_Q
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PLL_R = 6 // DSI
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PLL_CFGR = PLL_M | (PLL_N << stm32.RCC_PLLCFGR_PLLN_Pos) | (((PLL_P >> 1) - 1) << stm32.RCC_PLLCFGR_PLLP_Pos) |
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(1 << stm32.RCC_PLLCFGR_PLLSRC_Pos) | (PLL_Q << stm32.RCC_PLLCFGR_PLLQ_Pos) | (PLL_R << stm32.RCC_PLLCFGR_PLLR_Pos)
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)
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