From c122d16c71d2aa04baa8b4b5a5df7faed93240fb Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Thu, 2 Feb 2012 07:01:41 -0500 Subject: RCC: Add new mechanism for configuring the main PLL. The new style for configuring the PLL is to initialize a (series-specific) struct rcc_pll_cfg, and pass a pointer to it to rcc_configure_pll(). After that's done, you can use rcc_turn_on_clk(RCC_CLK_PLL) to turn on the main PLL, and busy-wait until rcc_is_clk_ready(RCC_CLK_PLL) is true to make sure the new configuration took effect. - libmaple/rcc.h: -- Add struct rcc_pll_cfg, which specifies a PLL configuration. This specifies a PLL source and a void pointer to series-specific PLL configuration data. -- Add rcc_configure_pll(), which takes a pointer to struct rcc_pll_cfg, and configures the main PLL. It's up to each series to define this function. - stm32f1/rcc.h: Add struct stm32f1_rcc_pll_data, to store F1-specific PLL configuration state. - stm32f1/rcc.c: Add an implementation for rcc_configure_pll(). - stm32f2/rcc.h: Add struct stm32f2_rcc_pll_data, to store F2-specific PLL configuration data. - stm32f2/rcc.c: Add an implementation for rcc_configure_pll(). Signed-off-by: Marti Bolivar --- libmaple/include/libmaple/rcc.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'libmaple/include/libmaple/rcc.h') diff --git a/libmaple/include/libmaple/rcc.h b/libmaple/include/libmaple/rcc.h index 4a22b5e..2c8776b 100644 --- a/libmaple/include/libmaple/rcc.h +++ b/libmaple/include/libmaple/rcc.h @@ -80,12 +80,30 @@ typedef enum rcc_sysclk_src { */ /* Clock prescaler management. */ + void rcc_set_prescaler(rcc_prescaler prescaler, uint32 divider); /* SYSCLK. */ + void rcc_switch_sysclk(rcc_sysclk_src sysclk_src); +/* PLL configuration */ + +/** + * @brief Specifies a configuration for the main PLL. + */ +typedef struct rcc_pll_cfg { + rcc_pllsrc pllsrc; /**< PLL source */ + void *data; /**< Series-specific configuration + * data. See the for your + * MCU for more information on what to put + * here. */ +} rcc_pll_cfg; + +void rcc_configure_pll(rcc_pll_cfg *pll_cfg); + /* System and secondary clock sources. */ + void rcc_turn_on_clk(rcc_clk clock); void rcc_turn_off_clk(rcc_clk clock); int rcc_is_clk_ready(rcc_clk clock); -- cgit v1.2.3