ARF3 DSHOT can not work

[tianbin4279]

arf3 3.1 dshot can not work According to f3evo re-made the target but Motor2 not worl in dshot,multishot is ok target.c: `#include

include

include "drivers/io.h"

include "drivers/timer.h"

include "drivers/timer_def.h"

include "drivers/dma.h"

const timerHardware_t timerHardware[USABLE_TIMER_CHANNEL_COUNT] = { // PPM / UART2 RX DEF_TIM(TIM8, CH1, PA15, TIM_USE_PPM, 0 ), // PPM DEF_TIM(TIM3, CH4, PB1, TIM_USE_MOTOR, 1 ), // PWM1 DEF_TIM(TIM3, CH2, PA7, TIM_USE_MOTOR, 1 ), // PWM2 DEF_TIM(TIM2, CH3, PA2, TIM_USE_MOTOR, 1 ), // PWM3 DEF_TIM(TIM2, CH2, PA1, TIM_USE_MOTOR, 1 ), // PWM4 DEF_TIM(TIM3, CH3, PB0, TIM_USE_MOTOR, 1 ), // PWM5 DEF_TIM(TIM3, CH1, PA6, TIM_USE_MOTOR, 1 ), // PWM6 DEF_TIM(TIM15, CH2, PA3, TIM_USE_MOTOR, 1 ), // PWM7 DEF_TIM(TIM2, CH1, PA0, TIM_USE_MOTOR, 1 ), // PWM8 DEF_TIM(TIM2, CH3, PB10, TIM_USE_MOTOR, 1 ),
DEF_TIM(TIM2, CH4, PB11, TIM_USE_MOTOR, 1 ),
DEF_TIM(TIM1, CH1, PA8, TIM_USE_LED | TIM_USE_TRANSPONDER, 1 ), // LED_STRIP / TRANSPONDER };`

target.h: `

pragma once

define TARGET_BOARD_IDENTIFIER "ARF3"

define CONFIG_FASTLOOP_PREFERRED_ACC ACC_DEFAULT

define LED0 PB8

define BEEPER PC15

define BEEPER_INVERTED

define USE_EXTI

define MPU_INT_EXTI PC13

define EXTI15_10_CALLBACK_HANDLER_COUNT 2 // MPU_INT, SDCardDetect

define USE_MPU_DATA_READY_SIGNAL

define ENSURE_MPU_DATA_READY_IS_LOW

define USE_MAG_DATA_READY_SIGNAL

define ENSURE_MAG_DATA_READY_IS_HIGH

define USE_ESC_TELEMETRY

define GYRO

define USE_GYRO_SPI_MPU6500

define ACC

define USE_ACC_SPI_MPU6500

define ACC_MPU6500_ALIGN CW180_DEG

define GYRO_MPU6500_ALIGN CW180_DEG

define BARO

define USE_BARO_BMP280

define MAG

define USE_MAG_AK8963

//#define USE_MAG_HMC5883 // External

define MAG_AK8963_ALIGN CW90_DEG_FLIP

//#define SONAR

define USB_IO

define USE_VCP

define USE_UART1

define USE_UART2

define USE_UART3

define SERIAL_PORT_COUNT 4

define USE_ESCSERIAL

define ESCSERIAL_TIMER_TX_HARDWARE 0 // PWM 1

define UART1_TX_PIN PA9

define UART1_RX_PIN PA10

define UART2_TX_PIN PA14 // PA14 / SWCLK

define UART2_RX_PIN PA15

define UART3_TX_PIN PB10 // PB10 (AF7)

define UART3_RX_PIN PB11 // PB11 (AF7)

define USE_I2C

define I2C_DEVICE (I2CDEV_1) // PB6/SCL, PB7/SDA

define USE_SPI

define USE_SPI_DEVICE_1 // PB9,3,4,5 on AF5 SPI1 (MPU)

define USE_SPI_DEVICE_2 // PB12,13,14,15 on AF5 SPI2 (SDCard)

define SPI1_NSS_PIN PB9

define SPI1_SCK_PIN PB3

define SPI1_MISO_PIN PB4

define SPI1_MOSI_PIN PB5

define SPI2_NSS_PIN PB12

define SPI2_SCK_PIN PB13

define SPI2_MISO_PIN PB14

define SPI2_MOSI_PIN PB15

define USE_SDCARD

define USE_SDCARD_SPI2

define SDCARD_DETECT_INVERTED

define SDCARD_DETECT_PIN PC14

define SDCARD_SPI_INSTANCE SPI2

define SDCARD_SPI_CS_PIN SPI2_NSS_PIN

// SPI2 is on the APB1 bus whose clock runs at 36MHz. Divide to under 400kHz for init:

define SDCARD_SPI_INITIALIZATION_CLOCK_DIVIDER 128

// Divide to under 25MHz for normal operation:

define SDCARD_SPI_FULL_SPEED_CLOCK_DIVIDER 2

// Note, this is the same DMA channel as UART1_RX. Luckily we don't use DMA for USART Rx.

define SDCARD_DMA_CHANNEL_TX DMA1_Channel5

define SDCARD_DMA_CHANNEL_TX_COMPLETE_FLAG DMA1_FLAG_TC5

define MPU6500_CS_PIN PB9

define MPU6500_SPI_INSTANCE SPI1

define BOARD_HAS_VOLTAGE_DIVIDER

define USE_ADC

define ADC_INSTANCE ADC2

define VBAT_ADC_PIN PA5

define CURRENT_METER_ADC_PIN PA4

define RSSI_ADC_PIN PB2

define LED_STRIP

define TRANSPONDER

define ENABLE_BLACKBOX_LOGGING_ON_SDCARD_BY_DEFAULT

define DEFAULT_RX_FEATURE FEATURE_RX_PPM

define DEFAULT_FEATURES (FEATURE_TRANSPONDER | FEATURE_BLACKBOX | FEATURE_RSSI_ADC | FEATURE_CURRENT_METER | FEATURE_TELEMETRY)

define SPEKTRUM_BIND

// USART3,

define BIND_PIN PB11

define USE_SERIAL_4WAY_BLHELI_INTERFACE

// IO - stm32f303cc in 48pin package

define TARGET_IO_PORTA 0xffff

define TARGET_IO_PORTB 0xffff

define TARGET_IO_PORTC (BIT(13)|BIT(14)|BIT(15))

define TARGET_IO_PORTF (BIT(0)|BIT(1)|BIT(4))

define USABLE_TIMER_CHANNEL_COUNT 12 // PPM, 8 PWM, UART3 RX/TX, LED Strip

define USED_TIMERS (TIM_N(1) | TIM_N(2) | TIM_N(3) | TIM_N(8) | TIM_N(15))

`

[mikeller]

Hi @tianbin4279.

The reason for this is that motor 1 & 2 have a resource conflict (both use timer 3):

DEF_TIM(TIM3, CH4, PB1, TIM_USE_MOTOR, 1 ), // PWM1
DEF_TIM(TIM3, CH2, PA7, TIM_USE_MOTOR, 1 ), // PWM2

You might be able to get DShot to work by using motors 1, 3 & 7, and either PPM (PA15) or LED (PA8) for the 4th motor.

[borisbstyle]

If this target is equal to f3 evo than this is a known limitation of this board.

You can try resource remap feature for that motor