diff options
Diffstat (limited to 'wirish/wirish.cpp')
-rw-r--r-- | wirish/wirish.cpp | 122 |
1 files changed, 84 insertions, 38 deletions
diff --git a/wirish/wirish.cpp b/wirish/wirish.cpp index 65d0262..6dcb1b5 100644 --- a/wirish/wirish.cpp +++ b/wirish/wirish.cpp @@ -23,61 +23,107 @@ *****************************************************************************/ /** - * @brief generic maple board bring up: + * @brief Generic Maple board initialization. * - * By default, we bring up all maple boards running on the stm32 to 72mhz, - * clocked off the PLL, driven by the 8MHz external crystal. - * - * AHB and APB2 are clocked at 72MHz - * APB1 is clocked at 36MHz + * By default, we bring up all Maple boards to 72MHz, clocked off the + * PLL, driven by the 8MHz external crystal. AHB and APB2 are clocked + * at 72MHz. APB1 is clocked at 36MHz. */ #include "wirish.h" + +#include "flash.h" +#include "rcc.h" +#include "nvic.h" #include "systick.h" #include "gpio.h" -#include "nvic.h" +#include "adc.h" +#include "timer.h" #include "usb.h" -#include "rcc.h" -#include "fsmc.h" -#include "dac.h" -#include "flash.h" -#include "native_sram.h" +static void setupFlash(void); +static void setupClocks(void); +static void setupADC(void); +static void setupTimers(void); + +/** + * Board-wide initialization function. Called before main(). + */ void init(void) { - /* make sure the flash is ready before spinning the high speed clock up */ + setupFlash(); + setupClocks(); + nvic_init(); + systick_init(SYSTICK_RELOAD_VAL); + gpio_init_all(); + afio_init(); + setupADC(); + setupTimers(); + setupUSB(); + + BOARD_INIT; +} + +static void setupFlash(void) { flash_enable_prefetch(); flash_set_latency(FLASH_WAIT_STATE_2); +} -#ifdef BOARD_maple_native - initNativeSRAM(); -#endif - - /* initialize clocks */ +/* + * Clock setup. Note that some of this only takes effect if we're + * running bare metal and the bootloader hasn't done it for us + * already. + * + * If you change this function, you MUST change the file-level Doxygen + * comment above. + */ +static void setupClocks() { rcc_clk_init(RCC_CLKSRC_PLL, RCC_PLLSRC_HSE, RCC_PLLMUL_9); rcc_set_prescaler(RCC_PRESCALER_AHB, RCC_AHB_SYSCLK_DIV_1); rcc_set_prescaler(RCC_PRESCALER_APB1, RCC_APB1_HCLK_DIV_2); rcc_set_prescaler(RCC_PRESCALER_APB2, RCC_APB2_HCLK_DIV_1); +} - nvic_init(); - systick_init(SYSTICK_RELOAD_VAL); - gpio_init_all(); - afio_init(); - - /* Initialize the ADC for slow conversions, to allow for high - impedance inputs. */ +/* TODO initialize more ADCs on high density boards. */ +static void setupADC() { adc_init(ADC1, 0); - adc_set_sample_rate(ADC1, ADC_SMPR_55_5); - - timer_init(TIMER1, 1); - timer_init(TIMER2, 1); - timer_init(TIMER3, 1); - timer_init(TIMER4, 1); -#ifdef STM32_HIGH_DENSITY - timer_init(TIMER5, 1); - timer_init(TIMER8, 1); -#endif - setupUSB(); + adc_set_sample_rate(ADC1, ADC_SMPR_55_5); // for high impedance inputs +} - /* include the board-specific init macro */ - BOARD_INIT; +static void timerDefaultConfig(timer_dev*); + +static void setupTimers() { + timer_foreach(timerDefaultConfig); +} + +static void timerDefaultConfig(timer_dev *dev) { + timer_adv_reg_map *regs = (dev->regs).adv; + const uint16 full_overflow = 0xFFFF; + const uint16 half_duty = 0x8FFF; + + timer_init(dev); + timer_pause(dev); + + regs->CR1 = TIMER_CR1_ARPE; + regs->PSC = 1; + regs->SR = 0; + regs->DIER = 0; + regs->EGR = TIMER_EGR_UG; + + switch (dev->type) { + case TIMER_ADVANCED: + regs->BDTR = TIMER_BDTR_MOE | TIMER_BDTR_LOCK_OFF; + // fall-through + case TIMER_GENERAL: + timer_set_reload(dev, full_overflow); + + for (int channel = 1; channel <= 4; channel++) { + timer_set_compare(dev, channel, half_duty); + timer_oc_set_mode(dev, channel, TIMER_OC_MODE_PWM_1, TIMER_OC_PE); + } + // fall-through + case TIMER_BASIC: + break; + } + + timer_resume(dev); } |