int main() {
rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_48MHZ]);
rcc_usb_prescale_1();
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_USBRST);
rcc_peripheral_reset(&RCC_AHBRSTR, RCC_AHBRSTR_IOPARST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_USBRST);
rcc_peripheral_clear_reset(&RCC_AHBRSTR, RCC_AHBRSTR_IOPARST);
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USBEN);
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN);
gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO11 | GPIO12);
gpio_clear(GPIOA, GPIO11 | GPIO12);
for (int i = 0; i < 0x800000; i++)
__asm__ volatile("nop");
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11 | GPIO12);
gpio_set_af(GPIOA, GPIO_AF14, GPIO11| GPIO12);
arm_bootloader::Dest dest = arm_bootloader::get_unique_dest();
char serial[10] = {0};
{
uint32_t x = dest;
char hex[] = "0123456789abcdef";
for(int i = 0; i < 8; i++) {
serial[7-i] = hex[x & 0xF];
x = x >> 4;
}
}
/* Buffer to be used for control requests. */
uint8_t usbd_control_buffer[128];
char const *usb_strings[] = {
"uf-mil",
"subbus",
serial,
};
usbd_device * usbd_dev = usbd_init(&stm32f103_usb_driver, &uf_subbus_protocol::usb::dev, &uf_subbus_protocol::usb::config, usb_strings, 3, usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbd_dev, cdcacm_set_config);
uf_subbus_protocol::usb::Sink sink(usbd_dev);
arm_bootloader::Handler handler(
sink,
dest,
2048);
handlerp = &handler;
while (1)
usbd_poll(usbd_dev);
}
void i2c_reset(uint32_t i2c)
{
switch (i2c) {
case I2C1:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_I2C1RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_I2C1RST);
break;
case I2C2:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_I2C2RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_I2C2RST);
break;
}
}
void spi_reset(uint32_t spi_peripheral)
{
switch (spi_peripheral) {
case SPI1:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_SPI1RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_SPI1RST);
break;
case SPI2:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_SPI2RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_SPI2RST);
break;
#if defined(STM32F1) || defined(STM32F2) || defined(STM32F3) || defined(STM32F4)
case SPI3:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_SPI3RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_SPI3RST);
break;
#endif
}
}
void disconnect_usb(void)
{
/* Disconnect USB cable by resetting USB Device and pulling USB_DP low*/
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1ENR_USBEN);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1ENR_USBEN);
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USBEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
gpio_clear(GPIOA, GPIO12);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12);
}
int main(void)
{
/* Check the force bootloader pin*/
uint16_t pin_b;
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN);
/* Switch PB5 (SWIM_RST_IN) up */
gpio_set(GPIOB, GPIO5);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
gpio_set(GPIOB, GPIO5);
pin_b = gpio_get(GPIOB, GPIO6);
/* Check state on PB6 ((SWIM_RST) and release PB5*/
pin_b = gpio_get(GPIOB, GPIO6);
gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_FLOAT, GPIO5);
if(((GPIOA_CRL & 0x40) == 0x40) && pin_b)
dfu_jump_app_if_valid();
dfu_protect(DFU_MODE);
rcc_clock_setup_in_hse_8mhz_out_72mhz();
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
systick_set_reload(900000);
/* Handle USB disconnect/connect */
/* Just in case: Disconnect USB cable by resetting USB Device
* and pulling USB_DP low
* Device will reconnect automatically as Pull-Up is hard wired*/
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1ENR_USBEN);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1ENR_USBEN);
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USBEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
gpio_clear(GPIOA, GPIO12);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12);
/* Handle LED*/
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
systick_interrupt_enable();
systick_counter_enable();
dfu_init(&stm32f103_usb_driver, DFU_MODE);
dfu_main();
}
void timer_reset(u32 timer_peripheral)
{
switch (timer_peripheral) {
case TIM1:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM1RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM1RST);
break;
case TIM2:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM2RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM2RST);
break;
case TIM3:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM3RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM3RST);
break;
case TIM4:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM4RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM4RST);
break;
case TIM5:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM5RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM5RST);
break;
case TIM6:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM6RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM6RST);
break;
case TIM7:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM7RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM7RST);
break;
case TIM8:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM8RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM8RST);
break;
/* These timers are not supported in libopencm3 yet */
/*
case TIM9:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM9RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM9RST);
break;
case TIM10:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM10RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM10RST);
break;
case TIM11:
rcc_peripheral_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM11RST);
rcc_peripheral_clear_reset(&RCC_APB2RSTR, RCC_APB2RSTR_TIM11RST);
break;
case TIM12:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM12RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM12RST);
break;
case TIM13:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM13RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM13RST);
break;
case TIM14:
rcc_peripheral_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM14RST);
rcc_peripheral_clear_reset(&RCC_APB1RSTR, RCC_APB1RSTR_TIM14RST);
break;
*/
}
}