ardupilot/libraries/AP_HAL_Linux/RCOutput_PRU.h

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#ifndef __AP_HAL_LINUX_RCOUTPUT_PRU_H__
#define __AP_HAL_LINUX_RCOUTPUT_PRU_H__
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#include "AP_HAL_Linux.h"
#define RCOUT_PRUSS_SHAREDRAM_BASE 0x4a310000
#define MAX_PWMS 12
#define PWM_CMD_MAGIC 0xf00fbaaf
#define PWM_REPLY_MAGIC 0xbaaff00f
#define PWM_CMD_CONFIG 0 /* full configuration in one go */
#define PWM_CMD_ENABLE 1 /* enable a pwm */
#define PWM_CMD_DISABLE 2 /* disable a pwm */
#define PWM_CMD_MODIFY 3 /* modify a pwm */
#define PWM_CMD_SET 4 /* set a pwm output explicitly */
#define PWM_CMD_CLR 5 /* clr a pwm output explicitly */
#define PWM_CMD_TEST 6 /* various crap */
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class Linux::LinuxRCOutput_PRU : public AP_HAL::RCOutput {
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void init(void* machtnichts);
void set_freq(uint32_t chmask, uint16_t freq_hz);
uint16_t get_freq(uint8_t ch);
void enable_ch(uint8_t ch);
void disable_ch(uint8_t ch);
void write(uint8_t ch, uint16_t period_us);
void write(uint8_t ch, uint16_t* period_us, uint8_t len);
uint16_t read(uint8_t ch);
void read(uint16_t* period_us, uint8_t len);
private:
static const int TICK_PER_US=200;
static const int TICK_PER_S=200000000;
struct pwm_cmd {
uint32_t magic;
uint32_t enmask; /* enable mask */
uint32_t offmsk; /* state when pwm is off */
uint32_t periodhi[MAX_PWMS][2];
uint32_t hilo_read[MAX_PWMS][2];
uint32_t enmask_read;
};
volatile struct pwm_cmd *sharedMem_cmd;
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};
#endif // __AP_HAL_LINUX_RCOUTPUT_PRU_H__