Hi,
I am using PCA9685 servo controller board to run 3 servo motors from PIC Microcontroller PIC16F1938. I can able run the servo but problem in timing. I am confused on setting ON time & OFF time. For example, pca_write(servo number, on time, off time). pca_write(0, 409, 1648) should run the servo less than pca_write(0, 409, 2235).
On time1: 1648 - 409 = 1239
On time2: 2235 - 409 = 1826
But, in practical, the former on time of the Servo is greater than the latter. Why? Am i missing anything?
Function:
pca_write (unsigned int ServoN, unsigned long on_count, unsigned long off_count) {
I2C_Start();
I2C_Write (pca_address);
I2C_Write ((ServoN * 4) + 6); // LEDn reg
I2C_Write(on_count & 0xFF); // 8 LSB bits
I2C_Write((on_count & 0xF00 >> 8); // 4 MSB bits
I2C_Write(off_count & 0xFF); // 8 LSB bits
I2C_Write((off_count & 0xF00) >> 8); // 4 MSB bits
I2C_Stop();
Any help?
Thank you all.
