void rcc_clock_setup_hsi(const clock_scale_t *clock)
{
/* Enable internal high-speed oscillator. */
rcc_osc_on(HSI);
rcc_wait_for_osc_ready(HSI);
/* Select HSI as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_HSI); /* XXX: se cayo */
rcc_wait_for_sysclk_status(HSI);
rcc_osc_off(PLL);
rcc_wait_for_osc_not_ready(PLL);
rcc_set_pll_source(clock->pllsrc);
rcc_set_main_pll_hsi(clock->pll);
/* Enable PLL oscillator and wait for it to stabilize. */
rcc_osc_on(PLL);
rcc_wait_for_osc_ready(PLL);
/*
* Set prescalers for AHB, ADC, ABP1, ABP2.
* Do this before touching the PLL (TODO: why?).
*/
rcc_set_hpre(clock->hpre);
rcc_set_ppre2(clock->ppre2);
rcc_set_ppre1(clock->ppre1);
/* Configure flash settings. */
flash_set_ws(clock->flash_config);
/* Select PLL as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_PLL); /* XXX: se cayo */
/* Wait for PLL clock to be selected. */
rcc_wait_for_sysclk_status(PLL);
/* Set the peripheral clock frequencies used. */
rcc_ppre1_frequency = clock->apb1_frequency;
rcc_ppre2_frequency = clock->apb2_frequency;
}
void rcc_clock_setup_hsi_3v3(const clock_scale_t *clock)
{
/* Enable internal high-speed oscillator. */
rcc_osc_on(HSI);
rcc_wait_for_osc_ready(HSI);
/* Select HSI as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_HSI);
// /* Enable/disable high performance mode */
// if (!clock->power_save) {
// pwr_set_vos_scale(SCALE1);
// } else {
// pwr_set_vos_scale(SCALE2);
// }
/*
* Set prescalers for AHB, ADC, ABP1, ABP2.
* Do this before touching the PLL (TODO: why?).
*/
rcc_set_hpre(clock->hpre);
rcc_set_ppre1(clock->ppre1);
rcc_set_ppre2(clock->ppre2);
rcc_set_main_pll_hsi(clock->pllm, clock->plln,
clock->pllp, clock->pllq);
/* Enable PLL oscillator and wait for it to stabilize. */
rcc_osc_on(PLL);
rcc_wait_for_osc_ready(PLL);
/* Configure flash settings. */
flash_set_ws(clock->flash_config);
/* Select PLL as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_PLL);
/* Wait for PLL clock to be selected. */
rcc_wait_for_sysclk_status(PLL);
/* Set the peripheral clock frequencies used. */
rcc_apb1_frequency = clock->apb1_frequency;
rcc_apb2_frequency = clock->apb2_frequency;
/* Disable internal high-speed oscillator. */
//rcc_osc_off(HSI);
}
void clock_setup()
{
/*
RCC_CR |= (uint32_t)0x00000001;
RCC_CFGR = 0x00000000;
RCC_CR &= (uint32_t)0xFEF6FFFF;
RCC_PLLCFGR = 0x24003010;
RCC_CR &= (uint32_t)0xFFFBFFFF;
RCC_CIR = 0x00000000;
SCB_VTOR = 0x08000000;
*/
/*
.pllm = 16,
.plln = 336,
.pllp = 2,
.pllq = 7,
.hpre = RCC_CFGR_HPRE_DIV_NONE,
.ppre1 = RCC_CFGR_PPRE_DIV_4,
.ppre2 = RCC_CFGR_PPRE_DIV_2,
.flash_config = FLASH_ACR_ICE | FLASH_ACR_DCE |
FLASH_ACR_LATENCY_5WS,
.apb1_frequency = 42000000,
.apb2_frequency = 84000000,
*/
/* Enable internal high-speed oscillator. */
rcc_osc_on(RCC_HSI);
rcc_wait_for_osc_ready(RCC_HSI);
/* Select HSI as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_HSI);
pwr_set_vos_scale(PWR_SCALE1);
rcc_set_main_pll_hsi(16, 336, 2, 8, 0);
/* Enable PLL oscillator and wait for it to stabilize. */
rcc_osc_on(RCC_PLL);
rcc_wait_for_osc_ready(RCC_PLL);
/* Configure flash settings. */
flash_set_ws(FLASH_ACR_ICE | FLASH_ACR_DCE |
FLASH_ACR_LATENCY_5WS);
/* Select PLL as SYSCLK source. */
rcc_set_sysclk_source(RCC_CFGR_SW_PLL);
rcc_set_hpre(RCC_CFGR_HPRE_DIV_NONE);
rcc_set_ppre1(RCC_CFGR_PPRE_DIV_4);
rcc_set_ppre2(RCC_CFGR_PPRE_DIV_2);
/* Wait for PLL clock to be selected. */
rcc_wait_for_sysclk_status(RCC_PLL);
rcc_ahb_frequency = 168000000;
rcc_apb1_frequency = 42000000;
rcc_apb2_frequency = 84000000;
/* Disable internal high-speed oscillator. */
rcc_osc_off(RCC_HSI);
// clock rate is 1680 to get 10uS interrupt rate
systick_set_reload(168);
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
systick_counter_enable();
systick_interrupt_enable();
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_GPIOB);
rcc_periph_clock_enable(RCC_GPIOC);
etk::set_tick_rate(1);
}