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https://w12.unix7.org/ Wed, 05 Aug 2026 03:50:44 +0000 FeedCreator 1.8 https://w12.unix7.org/_media/wiki/dokuwiki.svg https://w12.unix7.org/ https://w12.unix7.org/stm32/adc c embed STM32 F103 ADC, injected and regular Injected ADC /* Author, Copyright: Oleg Borodin */ #include <libopencm3/stm32/rcc.h> #include <libopencm3/stm32/gpio.h> #include <libopencm3/stm32/usart.h> #include <libopencm3/stm32/adc.h> #include <libopencm3/stm32/dma.h> #include <stdlib.h> #include <stdio.h> #include <errno.h> #include <wctype.h> #include <ctype.h> #include <time.h> #include <string.h> void delay(uint32_t n) { for (volatile int i = 0; i < n; i++) __asm__("nop")… anonymous@undisclosed.example.com (Anonymous) Sat, 27 Nov 2021 13:26:11 +0000 https://w12.unix7.org/stm32/dshot01 DSHOT draft on opencm3 Also there <https://github.com/kindsoldier/flightdrafts/tree/master/dshot300> /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <libopencm3/stm32/rcc.h> #include <libopencm3/stm32/gpio.h> #include <libopencm3/stm32/timer.h> #include <libopencm3/stm32/dma.h> #include <libopencm3/cm3/nvic.h> static void timer_gpio_setup(uint32_t gpio_group, uint32_t gpio_af, uint32_t gpio_pin) { gpio_mode_setup(gpio_group, GPIO_MODE_AF, GPIO_PUPD_NONE, gpio_pin)… anonymous@undisclosed.example.com (Anonymous) Wed, 14 Sep 2022 00:30:10 +0000 https://w12.unix7.org/stm32/i2c c embed STM32 I2C bus code I wrote the code “from scratch”. * [STM32F10xxx I2C optimized examples] /* Author, Copyright: Oleg Borodin */ #include <libopencm3/stm32/i2c.h> #include <stdlib.h> #include <i2creg.h> uint16_t i2c_read_seq(uint32_t i2c, uint16_t addr, uint8_t reg, uint8_t *data, uint16_t len) { i2c_enable_ack(i2c); i2c_send_start(i2c); /* I2C_EVENT_MASTER_MODE_SELECT EV5: BUSY, MSL and SB */ while (!((I2C_SR1(i2c) & I2C_SR1_SB) & (I2C_SR2(i2c… anonymous@undisclosed.example.com (Anonymous) Sat, 27 Nov 2021 13:26:11 +0000 https://w12.unix7.org/stm32/mpu c embed MPU6050 Polling mode void mpu_setup(void) { gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, GPIO_I2C1_SCL | GPIO_I2C1_SDA); i2c_peripheral_disable(I2C1); i2c_reset(I2C1); i2c_set_speed(I2C1, i2c_speed_fm_400k, I2C_CR2_FREQ_36MHZ); i2c_set_dutycycle(I2C1, I2C_CCR_DUTY_DIV2); i2c_peripheral_enable(I2C1); } uint8_t mpu_read_reg(uint32_t i2c, uint16_t addr, uint8_t reg) { uint8_t data = 0; i2c_enable_ack(i2c); … anonymous@undisclosed.example.com (Anonymous) Sat, 27 Nov 2021 13:26:11 +0000 https://w12.unix7.org/stm32/nanoos STM32 task scheduler Full code on <https://github.com/kindsoldier/stm32nanoos> Lib: * <http://we.easyelectronics.ru/STM32/atomarnye-operacii-v-cortex-m3.html> * <https://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html> * <https://ask-dev.ru/info/26222/spinlock-versus-semaphore> /* * Copyright 2022 Oleg Borodin <borodin@unix7.org> */ #include <libopencm3/cm3/nvic.h> #include <libopencm3/cm3/systick.h> #include <libopencm3/cm3/scb.h> #include <libopencm3/stm32/rcc.h> #inc… anonymous@undisclosed.example.com (Anonymous) Tue, 30 Aug 2022 17:48:36 +0000 https://w12.unix7.org/stm32/pwm STM32 PWM with opencm3 and on CMSIS #include <libopencm3/cm3/nvic.h> #include <libopencm3/stm32/rcc.h> #include <libopencm3/stm32/gpio.h> #include <libopencm3/stm32/timer.h> void delay(uint32_t n) { for (volatile int i = 0; i < n; i++) __asm__("nop"); } int main(void) { rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]); rcc_periph_clock_enable(RCC_GPIOA); rcc_periph_clock_enable(RCC_TIM5); rcc_periph_reset_pulse(RST_TIM5); gpio_set_mode(GPIOA, … anonymous@undisclosed.example.com (Anonymous) Thu, 25 Aug 2022 17:14:07 +0000