/****************************************************************************** * The MIT License * * Copyright (c) 2010 Perry Hung. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. *****************************************************************************/ /** * @file rcc.h * @brief reset and clock control definitions and prototypes */ #ifndef _RCC_H_ #define _RCC_H_ #ifdef __cplusplus extern "C"{ #endif /* registers */ #define RCC_BASE 0x40021000 #define RCC_CR (RCC_BASE + 0x0) #define RCC_CFGR (RCC_BASE + 0x4) #define RCC_CIR (RCC_BASE + 0x8) #define RCC_APB2RSTR (RCC_BASE + 0xC) #define RCC_APB1RSTR (RCC_BASE + 0x10) #define RCC_AHBENR (RCC_BASE + 0x14) #define RCC_APB2ENR (RCC_BASE + 0x18) #define RCC_APB1ENR (RCC_BASE + 0x1C) #define RCC_BDCR (RCC_BASE + 0x20) #define RCC_CSR (RCC_BASE + 0x24) #define RCC_AHBSTR (RCC_BASE + 0x28) #define RCC_CFGR2 (RCC_BASE + 0x2C) #define RCC_CFGR_USBPRE (0x1 << 22) #define RCC_CFGR_ADCPRE (0x3 << 14) #define RCC_CFGR_PPRE1 (0x7 << 8) #define RCC_CFGR_PPRE2 (0x7 << 11) #define RCC_CFGR_HPRE (0xF << 4) #define RCC_CFGR_PLLSRC (0x1 << 16) #define RCC_CFGR_SWS (0x3 << 2) #define RCC_CFGR_SWS_PLL (0x2 << 2) #define RCC_CFGR_SWS_HSE (0x1 << 2) #define RCC_CFGR_SW (0x3 << 0) #define RCC_CFGR_SW_PLL (0x2 << 0) #define RCC_CFGR_SW_HSE (0x1 << 0) /* CR status bits */ #define RCC_CR_HSEON (0x1 << 16) #define RCC_CR_HSERDY (0x1 << 17) #define RCC_CR_PLLON (0x1 << 24) #define RCC_CR_PLLRDY (0x1 << 25) #define RCC_WRITE_CFGR(val) __write(RCC_CFGR, val) #define RCC_READ_CFGR() __read(RCC_CFGR) #define RCC_WRITE_CR(val) __write(RCC_CR, val) #define RCC_READ_CR() __read(RCC_CR) /* sysclk source */ #define RCC_CLKSRC_HSI (0x0) #define RCC_CLKSRC_HSE (0x1) #define RCC_CLKSRC_PLL (0x2) /* pll entry clock source */ #define RCC_PLLSRC_HSE (0x1 << 16) #define RCC_PLLSRC_HSI_DIV_2 (0x0 << 16) /* adc prescaler dividers */ #define RCC_ADCPRE_PCLK_DIV_2 (0x0 << 14) #define RCC_ADCPRE_PCLK_DIV_4 (0x1 << 14) #define RCC_ADCPRE_PCLK_DIV_6 (0x2 << 14) #define RCC_ADCPRE_PCLK_DIV_8 (0x3 << 14) /* apb1 prescaler dividers */ #define RCC_APB1_HCLK_DIV_1 (0x0 << 8) #define RCC_APB1_HCLK_DIV_2 (0x4 << 8) #define RCC_APB1_HCLK_DIV_4 (0x5 << 8) #define RCC_APB1_HCLK_DIV_8 (0x6 << 8) #define RCC_APB1_HCLK_DIV_16 (0x7 << 8) /* apb2 prescaler dividers */ #define RCC_APB2_HCLK_DIV_1 (0x0 << 11) #define RCC_APB2_HCLK_DIV_2 (0x4 << 11) #define RCC_APB2_HCLK_DIV_4 (0x5 << 11) #define RCC_APB2_HCLK_DIV_8 (0x6 << 11) #define RCC_APB2_HCLK_DIV_16 (0x7 << 11) /* ahb prescaler dividers */ #define RCC_AHB_SYSCLK_DIV_1 (0x0 << 4) #define RCC_AHB_SYSCLK_DIV_2 (0x8 << 4) #define RCC_AHB_SYSCLK_DIV_4 (0x9 << 4) #define RCC_AHB_SYSCLK_DIV_8 (0xA << 4) #define RCC_AHB_SYSCLK_DIV_16 (0xB << 4) #define RCC_AHB_SYSCLK_DIV_32 (0xC << 4) #define RCC_AHB_SYSCLK_DIV_64 (0xD << 4) #define RCC_AHB_SYSCLK_DIV_128 (0xD << 4) #define RCC_AHB_SYSCLK_DIV_256 (0xE << 4) #define RCC_AHB_SYSCLK_DIV_512 (0xF << 4) /* pll multipliers */ #define RCC_PLLMUL_2 (0x0 << 18) #define RCC_PLLMUL_3 (0x1 << 18) #define RCC_PLLMUL_4 (0x2 << 18) #define RCC_PLLMUL_5 (0x3 << 18) #define RCC_PLLMUL_6 (0x4 << 18) #define RCC_PLLMUL_7 (0x5 << 18) #define RCC_PLLMUL_8 (0x6 << 18) #define RCC_PLLMUL_9 (0x7 << 18) #define RCC_PLLMUL_10 (0x8 << 18) #define RCC_PLLMUL_11 (0x9 << 18) #define RCC_PLLMUL_12 (0xA << 18) #define RCC_PLLMUL_13 (0xB << 18) #define RCC_PLLMUL_14 (0xC << 18) #define RCC_PLLMUL_15 (0xD << 18) #define RCC_PLLMUL_16 (0xE << 18) /* prescalers */ enum { RCC_PRESCALER_AHB, RCC_PRESCALER_APB1, RCC_PRESCALER_APB2, RCC_PRESCALER_USB, RCC_PRESCALER_ADC }; /* * Identifies bus and clock line for a device */ typedef enum { RCC_GPIOA, RCC_GPIOB, RCC_GPIOC, RCC_GPIOD, RCC_GPIOE, // High-density devices only (Maple Native) RCC_GPIOF, // High-density devices only (Maple Native) RCC_GPIOG, // High-density devices only (Maple Native) RCC_AFIO, RCC_ADC1, RCC_ADC2, RCC_ADC3, RCC_USART1, RCC_USART2, RCC_USART3, RCC_UART4, // High-density devices only (Maple Native) RCC_UART5, // High-density devices only (Maple Native) RCC_TIMER1, RCC_TIMER2, RCC_TIMER3, RCC_TIMER4, RCC_TIMER5, // High-density devices only (Maple Native) RCC_TIMER6, // High-density devices only (Maple Native) RCC_TIMER7, // High-density devices only (Maple Native) RCC_TIMER8, // High-density devices only (Maple Native) RCC_SPI1, RCC_SPI2, RCC_FSMC, // High-density devices only (Maple Native) RCC_DAC, // High-density devices only (Maple Native) RCC_DMA1, RCC_DMA2, // High-density devices only (Maple Native) } rcc_clk_id; void rcc_clk_init(uint32 sysclk_src, uint32 pll_src, uint32 pll_mul); void rcc_clk_enable(uint32 dev); void rcc_reset_dev(uint32 dev); void rcc_set_prescaler(uint32 prescaler, uint32 divider); #ifdef __cplusplus } // extern "C" #endif #endif