// Activate the bootloader without BOOT* pins.
STATIC NORETURN mp_obj_t machine_bootloader(void) {
pyb_usb_dev_deinit();
storage_flush();
HAL_RCC_DeInit();
HAL_DeInit();
#if defined(MCU_SERIES_F7)
// arm-none-eabi-gcc 4.9.0 does not correctly inline this
// MSP function, so we write it out explicitly here.
//__set_MSP(*((uint32_t*) 0x1FF00000));
__ASM volatile ("movw r3, #0x0000\nmovt r3, #0x1FF0\nldr r3, [r3, #0]\nMSR msp, r3\n" : : : "r3", "sp");
((void (*)(void)) *((uint32_t*) 0x1FF00004))();
#else
__HAL_REMAPMEMORY_SYSTEMFLASH();
// arm-none-eabi-gcc 4.9.0 does not correctly inline this
// MSP function, so we write it out explicitly here.
//__set_MSP(*((uint32_t*) 0x00000000));
__ASM volatile ("movs r3, #0\nldr r3, [r3, #0]\nMSR msp, r3\n" : : : "r3", "sp");
((void (*)(void)) *((uint32_t*) 0x00000004))();
#endif
while (1);
}
void pwmout_init_ex(pwmout_t* obj, PinName pin, uint32_t freq)
{
HAL_RCC_DeInit();
if (!HSE_SystemClock_Config_72Mhz()) {
error("PWM error: switch to 72Mhz failed.");;
}
// Update the SystemCoreClock variable
SystemCoreClockUpdate();
if (freq > SystemCoreClock) {
error("PWM error: clock is too high.");
}
if ( (SystemCoreClock / 2) % freq) {
error("PWM error: unsupported clock.");
}
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
if (obj->pwm == (PWMName)NC) {
error("PWM error: pinout mapping failed.");
}
// Enable TIM clock
if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
obj->pin = pin;
obj->period = 0;
obj->pulse = 0;
pwmout_period_ns(obj, (SystemCoreClock / 2) / freq); // 20 ms per default
}
/**
* This RCC initial for system.
* use HSE clock source
* HSE = 20MHZ; sysclk = 20MHZ
* sysclk source is HSE
* AHB prescaler is 1, HCLK = SYSCKL = SystemCoreClock = 20MHZ
*/
static void RCC_Configuration(void)
{
RCC_ClkInitTypeDef ClkInit = {0};
RCC_OscInitTypeDef OscInit = {0};
HAL_RCC_DeInit();
/* Enable HSI Oscillator and Activate PLL with HSI as source */
OscInit.OscillatorType = RCC_OSCILLATORTYPE_HSI;
OscInit.HSIState = RCC_HSI_ON;
OscInit.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
OscInit.PLL.PLLState = RCC_PLL_ON;
OscInit.PLL.PLLDIV = RCC_PLLDIV_2;
OscInit.PLL.PLLMUL = RCC_PLLMUL_4;
OscInit.PLL.PLLSource = RCC_PLLSOURCE_HSI;
if (HAL_RCC_OscConfig(&OscInit) != HAL_OK)
{
RT_ASSERT(RT_NULL);
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
ClkInit.ClockType = RCC_CLOCKTYPE_SYSCLK |
RCC_CLOCKTYPE_HCLK |
RCC_CLOCKTYPE_PCLK1 |
RCC_CLOCKTYPE_PCLK2;
ClkInit.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
ClkInit.AHBCLKDivider = RCC_SYSCLK_DIV1;
ClkInit.APB1CLKDivider = RCC_HCLK_DIV1;
ClkInit.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&ClkInit, FLASH_LATENCY_1) != HAL_OK)
{
RT_ASSERT(RT_NULL);
}
}
