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/*
* Oct 2017 Karl Palsson <karlp@tweak.net.au>
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/flash.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/pwr.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/usart.h>
#include "uart-basic.h"
#define LED_DISCO_GREEN_RCC RCC_GPIOE
#define LED_DISCO_GREEN_PORT GPIOE
#define LED_DISCO_GREEN_PIN GPIO8
void usart2_isr(void)
{
ub_irq_handler();
}
static void setup_rcc_hack(void)
{
pwr_set_vos_scale(PWR_SCALE1);
flash_set_ws(FLASH_ACR_LATENCY_2WS);
rcc_set_msi_range(RCC_CR_MSIRANGE_48MHZ);
/* ok, we manually poked around, let the lib know */
rcc_apb1_frequency = rcc_apb2_frequency = 48e6;
}
static void board_init(void)
{
rcc_periph_clock_enable(RCC_GPIOD);
gpio_mode_setup(GPIOD, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO5 | GPIO6);
/* usart2 is AF7 */
gpio_set_af(GPIOD, GPIO_AF7, GPIO5 | GPIO6);
}
int main(void)
{
int i;
int j = 0;
setup_rcc_hack();
board_init();
struct ub_hw ub = {
.uart = USART2,
.uart_nvic = NVIC_USART2_IRQ,
.uart_rcc = RCC_USART2,
};
ub_init(&ub);
printf("hi guys!\n");
/* green led for ticking */
rcc_periph_clock_enable(LED_DISCO_GREEN_RCC);
gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
LED_DISCO_GREEN_PIN);
while (1) {
gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */
__asm__("NOP");
}
ub_task();
gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
for (i = 0; i < 0xa0000; i++) { /* Wait a bit. */
__asm__("NOP");
}
}
return 0;
}
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