From b6290890b64d5188f75527b979c5c7912547be9b Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Wed, 16 Nov 2011 15:14:03 -0500 Subject: Move RCC support for STM32F1 to libmaple/stm32f1/. This is a backwards-compatible change. Modify libmaple/rules.mk to include the family's include directory. This allows libmaple/include/libmaple/rcc.h to include the STM32F1 RCC header with #include . We'll use this convention henceforth to distinguish between top-level and family-specific headers. Signed-off-by: Marti Bolivar --- libmaple/rcc.c | 206 --------------------------------------------------------- 1 file changed, 206 deletions(-) delete mode 100644 libmaple/rcc.c (limited to 'libmaple/rcc.c') diff --git a/libmaple/rcc.c b/libmaple/rcc.c deleted file mode 100644 index ed3f11e..0000000 --- a/libmaple/rcc.c +++ /dev/null @@ -1,206 +0,0 @@ -/****************************************************************************** - * 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.c - * @brief Implements pretty much only the basic clock setup on the - * stm32, clock enable/disable and peripheral reset commands. - */ - -#include -#include -#include -#include - -#define APB1 RCC_APB1 -#define APB2 RCC_APB2 -#define AHB RCC_AHB - -struct rcc_dev_info { - const rcc_clk_domain clk_domain; - const uint8 line_num; -}; - -/* Device descriptor table, maps rcc_clk_id onto bus and enable/reset - * register bit numbers. */ -static const struct rcc_dev_info rcc_dev_table[] = { - [RCC_GPIOA] = { .clk_domain = APB2, .line_num = 2 }, - [RCC_GPIOB] = { .clk_domain = APB2, .line_num = 3 }, - [RCC_GPIOC] = { .clk_domain = APB2, .line_num = 4 }, - [RCC_GPIOD] = { .clk_domain = APB2, .line_num = 5 }, - [RCC_AFIO] = { .clk_domain = APB2, .line_num = 0 }, - [RCC_ADC1] = { .clk_domain = APB2, .line_num = 9 }, - [RCC_ADC2] = { .clk_domain = APB2, .line_num = 10 }, - [RCC_ADC3] = { .clk_domain = APB2, .line_num = 15 }, - [RCC_USART1] = { .clk_domain = APB2, .line_num = 14 }, - [RCC_USART2] = { .clk_domain = APB1, .line_num = 17 }, - [RCC_USART3] = { .clk_domain = APB1, .line_num = 18 }, - [RCC_TIMER1] = { .clk_domain = APB2, .line_num = 11 }, - [RCC_TIMER2] = { .clk_domain = APB1, .line_num = 0 }, - [RCC_TIMER3] = { .clk_domain = APB1, .line_num = 1 }, - [RCC_TIMER4] = { .clk_domain = APB1, .line_num = 2 }, - [RCC_SPI1] = { .clk_domain = APB2, .line_num = 12 }, - [RCC_SPI2] = { .clk_domain = APB1, .line_num = 14 }, - [RCC_DMA1] = { .clk_domain = AHB, .line_num = 0 }, - [RCC_PWR] = { .clk_domain = APB1, .line_num = 28}, - [RCC_BKP] = { .clk_domain = APB1, .line_num = 27}, - [RCC_I2C1] = { .clk_domain = APB1, .line_num = 21 }, - [RCC_I2C2] = { .clk_domain = APB1, .line_num = 22 }, - [RCC_CRC] = { .clk_domain = AHB, .line_num = 6}, - [RCC_FLITF] = { .clk_domain = AHB, .line_num = 4}, - [RCC_SRAM] = { .clk_domain = AHB, .line_num = 2}, - [RCC_USB] = { .clk_domain = APB1, .line_num = 23}, -#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY) - [RCC_GPIOE] = { .clk_domain = APB2, .line_num = 6 }, - [RCC_GPIOF] = { .clk_domain = APB2, .line_num = 7 }, - [RCC_GPIOG] = { .clk_domain = APB2, .line_num = 8 }, - [RCC_UART4] = { .clk_domain = APB1, .line_num = 19 }, - [RCC_UART5] = { .clk_domain = APB1, .line_num = 20 }, - [RCC_TIMER5] = { .clk_domain = APB1, .line_num = 3 }, - [RCC_TIMER6] = { .clk_domain = APB1, .line_num = 4 }, - [RCC_TIMER7] = { .clk_domain = APB1, .line_num = 5 }, - [RCC_TIMER8] = { .clk_domain = APB2, .line_num = 13 }, - [RCC_FSMC] = { .clk_domain = AHB, .line_num = 8 }, - [RCC_DAC] = { .clk_domain = APB1, .line_num = 29 }, - [RCC_DMA2] = { .clk_domain = AHB, .line_num = 1 }, - [RCC_SDIO] = { .clk_domain = AHB, .line_num = 10 }, - [RCC_SPI3] = { .clk_domain = APB1, .line_num = 15 }, -#endif -#ifdef STM32_XL_DENSITY - [RCC_TIMER9] = { .clk_domain = APB2, .line_num = 19 }, - [RCC_TIMER10] = { .clk_domain = APB2, .line_num = 20 }, - [RCC_TIMER11] = { .clk_domain = APB2, .line_num = 21 }, - [RCC_TIMER12] = { .clk_domain = APB1, .line_num = 6 }, - [RCC_TIMER13] = { .clk_domain = APB1, .line_num = 7 }, - [RCC_TIMER14] = { .clk_domain = APB1, .line_num = 8 }, -#endif -}; - -/** - * @brief Initialize the clock control system. Initializes the system - * clock source to use the PLL driven by an external oscillator - * @param sysclk_src system clock source, must be PLL - * @param pll_src pll clock source, must be HSE - * @param pll_mul pll multiplier - */ -void rcc_clk_init(rcc_sysclk_src sysclk_src, - rcc_pllsrc pll_src, - rcc_pll_multiplier pll_mul) { - uint32 cfgr = 0; - uint32 cr; - - /* Assume that we're going to clock the chip off the PLL, fed by - * the HSE */ - ASSERT(sysclk_src == RCC_CLKSRC_PLL && - pll_src == RCC_PLLSRC_HSE); - - RCC_BASE->CFGR = pll_src | pll_mul; - - /* Turn on the HSE */ - cr = RCC_BASE->CR; - cr |= RCC_CR_HSEON; - RCC_BASE->CR = cr; - while (!(RCC_BASE->CR & RCC_CR_HSERDY)) - ; - - /* Now the PLL */ - cr |= RCC_CR_PLLON; - RCC_BASE->CR = cr; - while (!(RCC_BASE->CR & RCC_CR_PLLRDY)) - ; - - /* Finally, let's switch over to the PLL */ - cfgr &= ~RCC_CFGR_SW; - cfgr |= RCC_CFGR_SW_PLL; - RCC_BASE->CFGR = cfgr; - while ((RCC_BASE->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_PLL) - ; -} - -/** - * @brief Turn on the clock line on a peripheral - * @param id Clock ID of the peripheral to turn on. - */ -void rcc_clk_enable(rcc_clk_id id) { - static const __io uint32* enable_regs[] = { - [APB1] = &RCC_BASE->APB1ENR, - [APB2] = &RCC_BASE->APB2ENR, - [AHB] = &RCC_BASE->AHBENR, - }; - - rcc_clk_domain clk_domain = rcc_dev_clk(id); - __io uint32* enr = (__io uint32*)enable_regs[clk_domain]; - uint8 lnum = rcc_dev_table[id].line_num; - - bb_peri_set_bit(enr, lnum, 1); -} - -/** - * @brief Reset a peripheral. - * @param id Clock ID of the peripheral to reset. - */ -void rcc_reset_dev(rcc_clk_id id) { - static const __io uint32* reset_regs[] = { - [APB1] = &RCC_BASE->APB1RSTR, - [APB2] = &RCC_BASE->APB2RSTR, - }; - - rcc_clk_domain clk_domain = rcc_dev_clk(id); - __io void* addr = (__io void*)reset_regs[clk_domain]; - uint8 lnum = rcc_dev_table[id].line_num; - - bb_peri_set_bit(addr, lnum, 1); - bb_peri_set_bit(addr, lnum, 0); -} - -/** - * @brief Get a peripheral's clock domain - * @param id Clock ID of the peripheral whose clock domain to return - * @return Clock source for the given clock ID - */ -rcc_clk_domain rcc_dev_clk(rcc_clk_id id) { - return rcc_dev_table[id].clk_domain; -} - -/** - * @brief Set the divider on a peripheral prescaler - * @param prescaler prescaler to set - * @param divider prescaler divider - */ -void rcc_set_prescaler(rcc_prescaler prescaler, uint32 divider) { - static const uint32 masks[] = { - [RCC_PRESCALER_AHB] = RCC_CFGR_HPRE, - [RCC_PRESCALER_APB1] = RCC_CFGR_PPRE1, - [RCC_PRESCALER_APB2] = RCC_CFGR_PPRE2, - [RCC_PRESCALER_USB] = RCC_CFGR_USBPRE, - [RCC_PRESCALER_ADC] = RCC_CFGR_ADCPRE, - }; - - uint32 cfgr = RCC_BASE->CFGR; - cfgr &= ~masks[prescaler]; - cfgr |= divider; - RCC_BASE->CFGR = cfgr; -} -- cgit v1.2.3