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/******************************************************************************
* 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_PWR,
RCC_BKP,
} rcc_clk_id;
void rcc_clk_init(uint32 sysclk_src, uint32 pll_src, uint32 pll_mul);
void rcc_clk_enable(rcc_clk_id device);
void rcc_reset_dev(rcc_clk_id device);
void rcc_set_prescaler(uint32 prescaler, uint32 divider);
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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