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94 lines
2.9 KiB
94 lines
2.9 KiB
#include "ugv_io.hh" |
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#include <driver/gpio.h> |
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#include <driver/mcpwm.h> |
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#include <esp_log.h> |
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#include <math.h> |
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#include "MPU.hpp" |
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#include "mpu/math.hpp" |
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namespace ugv { |
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namespace io { |
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static constexpr mcpwm_unit_t MCPWM_UNIT = MCPWM_UNIT_0; |
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static constexpr gpio_num_t MOTOR_LEFT_PWM = GPIO_NUM_0; |
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static constexpr gpio_num_t MOTOR_LEFT_DIR = GPIO_NUM_0; |
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static constexpr gpio_num_t MOTOR_RIGHT_PWM = GPIO_NUM_0; |
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static constexpr gpio_num_t MOTOR_RIGHT_DIR = GPIO_NUM_0; |
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static constexpr mpud::accel_fs_t MPU_ACCEL_FS = mpud::ACCEL_FS_2G; |
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static constexpr mpud::gyro_fs_t MPU_GYRO_FS = mpud::GYRO_FS_500DPS; |
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static constexpr float MPU_MAG_TO_FLUX = (4912.f) / (32760.f); |
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static const char *TAG = "ugv_io"; |
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IO io; |
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IO::IO() { mpu_ = new mpud::MPU(); } |
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IO::~IO() { |
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delete mpu_; |
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} |
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void IO::Init() { |
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esp_err_t ret; |
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gpio_set_direction(MOTOR_LEFT_PWM, GPIO_MODE_OUTPUT); |
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gpio_set_direction(MOTOR_LEFT_DIR, GPIO_MODE_OUTPUT); |
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gpio_set_direction(MOTOR_RIGHT_PWM, GPIO_MODE_OUTPUT); |
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gpio_set_direction(MOTOR_RIGHT_DIR, GPIO_MODE_OUTPUT); |
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mcpwm_gpio_init(MCPWM_UNIT, MCPWM0A, MOTOR_LEFT_PWM); |
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mcpwm_gpio_init(MCPWM_UNIT, MCPWM0B, MOTOR_RIGHT_PWM); |
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mcpwm_config_t mcpwm_config; |
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mcpwm_config.frequency = 20000; // 20khz |
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mcpwm_config.cmpr_a = 0; |
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mcpwm_config.cmpr_b = 0; |
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mcpwm_config.counter_mode = MCPWM_UP_DOWN_COUNTER; // for symmetric pwm |
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mcpwm_config.duty_mode = MCPWM_DUTY_MODE_0; // active high |
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mcpwm_init(MCPWM_UNIT, MCPWM_TIMER_0, &mcpwm_config); |
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do { |
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ret = mpu_->testConnection(); |
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if (ret != ESP_OK) { |
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ESP_LOGE(TAG, "MPU not connected"); |
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break; |
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} |
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ret = mpu_->initialize(); |
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if (ret != ESP_OK) { |
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ESP_LOGE(TAG, "MPU initialization error"); |
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break; |
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} |
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mpu_->setAccelFullScale(MPU_ACCEL_FS); |
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mpu_->setGyroFullScale(MPU_GYRO_FS); |
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ESP_LOGI(TAG, "MPU initialized"); |
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} while (0); |
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} // namespace io |
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void IO::ReadInputs(Inputs &inputs) { |
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esp_err_t ret = mpu_->motion(&accel_, &gyro_, &mag_); |
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if (ret != ESP_OK) { |
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ESP_LOGE(TAG, "error reading MPU"); |
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} |
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inputs.accel = mpud::accelGravity(accel_, MPU_ACCEL_FS); |
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inputs.gyro_rate = mpud::gyroDegPerSec(gyro_, MPU_GYRO_FS); |
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inputs.mag.x = ((float)mag_.x) * MPU_MAG_TO_FLUX; |
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inputs.mag.y = ((float)mag_.y) * MPU_MAG_TO_FLUX; |
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inputs.mag.z = ((float)mag_.z) * MPU_MAG_TO_FLUX; |
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} |
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void IO::WriteOutputs(const Outputs &outputs) { |
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mcpwm_set_duty(MCPWM_UNIT, MCPWM_TIMER_0, MCPWM_OPR_A, |
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fabs(outputs.left_motor)); |
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mcpwm_set_duty(MCPWM_UNIT, MCPWM_TIMER_0, MCPWM_OPR_B, |
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fabs(outputs.right_motor)); |
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bool left_dir, right_dir; |
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left_dir = outputs.left_motor < 0.f; |
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right_dir = outputs.right_motor < 0.f; |
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gpio_set_level(MOTOR_LEFT_DIR, left_dir); |
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gpio_set_level(MOTOR_RIGHT_DIR, right_dir); |
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} |
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}; // namespace io |
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}; // namespace ugv
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