Firmwaredownload i2c speed
I have the compiled C-Code of my DSP-Project i'm writing from my C++ Program via i2c to the DSP on startup.
Everything works fine.... but:
I have an other Device on my i2c bus, only works with 10kHz Baudrate.
When I decrease the i2c Speed to 10kHz, the Firmwaredownload to the DSP seems not to work.
--> Is there a way to load my DSP per i2c with a low bus-Speed?
I use the following (auto-generated) code for download:
void default_download_IC_1() {
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SAMPLE_RATE_SETTING_IC_1_ADDR, REG_SAMPLE_RATE_SETTING_IC_1_BYTE, R0_SAMPLE_RATE_SETTING_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DSP_RUN_REGISTER_IC_1_ADDR, REG_DSP_RUN_REGISTER_IC_1_BYTE, R1_DSP_RUN_REGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_CLKCTRLREGISTER_IC_1_ADDR, REG_CLKCTRLREGISTER_IC_1_BYTE, R2_CLKCTRLREGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_PLLCRLREGISTER_IC_1_ADDR, REG_PLLCRLREGISTER_IC_1_BYTE, R3_PLLCRLREGISTER_IC_1_Default );
SIGMA_WRITE_DELAY( DEVICE_ADDR_IC_1, R4_DELAY_IC_1_SIZE, R4_DELAY_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SERIAL_PORT_CONTROL_0_IC_1_ADDR , R5_SERIAL_PORT_CONTROL_REGISTERS_IC_1_SIZE, R5_SERIAL_PORT_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_ALC_CONTROL_0_IC_1_ADDR , R6_ALC_CONTROL_REGISTERS_IC_1_SIZE, R6_ALC_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_MICCTRLREGISTER_IC_1_ADDR, REG_MICCTRLREGISTER_IC_1_BYTE, R7_MICCTRLREGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_RECORD_PWR_MANAGEMENT_IC_1_ADDR , R8_RECORD_INPUT_SIGNAL_PATH_REGISTERS_IC_1_SIZE, R8_RECORD_INPUT_SIGNAL_PATH_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_ADC_CONTROL_0_IC_1_ADDR , R9_ADC_CONTROL_REGISTERS_IC_1_SIZE, R9_ADC_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_PLAYBACK_MIXER_LEFT_CONTROL_0_IC_1_ADDR , R10_PLAYBACK_OUTPUT_SIGNAL_PATH_REGISTERS_IC_1_SIZE, R10_PLAYBACK_OUTPUT_SIGNAL_PATH_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_CONVERTER_CTRL_0_IC_1_ADDR , R11_CONVERTER_CONTROL_REGISTERS_IC_1_SIZE, R11_CONVERTER_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DAC_CONTROL_0_IC_1_ADDR , R12_DAC_CONTROL_REGISTERS_IC_1_SIZE, R12_DAC_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SERIAL_PORT_PAD_CONTROL_0_IC_1_ADDR , R13_SERIAL_PORT_PAD_CONTROL_REGISTERS_IC_1_SIZE, R13_SERIAL_PORT_PAD_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_COMM_PORT_PAD_CTRL_0_IC_1_ADDR , R14_COMMUNICATION_PORT_PAD_CONTROL_REGISTERS_IC_1_SIZE, R14_COMMUNICATION_PORT_PAD_CONTROL_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_JACKREGISTER_IC_1_ADDR, REG_JACKREGISTER_IC_1_BYTE, R15_JACKREGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DSP_ENABLE_REGISTER_IC_1_ADDR, REG_DSP_ENABLE_REGISTER_IC_1_BYTE, R21_DSP_ENABLE_REGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_CRC_IDEAL_1_IC_1_ADDR , R22_CRC_REGISTERS_IC_1_SIZE, R22_CRC_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_GPIO_0_CONTROL_IC_1_ADDR , R23_GPIO_REGISTERS_IC_1_SIZE, R23_GPIO_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_NON_MODULO_RAM_1_IC_1_ADDR , R24_NON_MODULO_REGISTERS_IC_1_SIZE, R24_NON_MODULO_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_WATCHDOG_ENABLE_IC_1_ADDR , R25_WATCHDOG_REGISTERS_IC_1_SIZE, R25_WATCHDOG_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SAMPLE_RATE_SETTING_IC_1_ADDR, REG_SAMPLE_RATE_SETTING_IC_1_BYTE, R26_SAMPLE_RATE_SETTING_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_ROUTING_MATRIX_INPUTS_IC_1_ADDR, REG_ROUTING_MATRIX_INPUTS_IC_1_BYTE, R27_ROUTING_MATRIX_INPUTS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_ROUTING_MATRIX_OUTPUTS_IC_1_ADDR, REG_ROUTING_MATRIX_OUTPUTS_IC_1_BYTE, R28_ROUTING_MATRIX_OUTPUTS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SERIAL_DATAGPIO_PIN_CONFIG_IC_1_ADDR, REG_SERIAL_DATAGPIO_PIN_CONFIG_IC_1_BYTE, R29_SERIAL_DATAGPIO_PIN_CONFIG_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DSP_SLEW_MODES_IC_1_ADDR, REG_DSP_SLEW_MODES_IC_1_BYTE, R30_DSP_SLEW_MODES_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SERIAL_PORT_SAMPLE_RATE_SETTING_IC_1_ADDR, REG_SERIAL_PORT_SAMPLE_RATE_SETTING_IC_1_BYTE, R31_SERIAL_PORT_SAMPLE_RATE_SETTING_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_CLOCK_ENABLE_REG_0_IC_1_ADDR , R32_CLOCK_ENABLE_REGISTERS_IC_1_SIZE, R32_CLOCK_ENABLE_REGISTERS_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PROGRAM_ADDR_IC_1, PROGRAM_SIZE_IC_1, Program_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, PARAM_ADDR_IC_1, PARAM_SIZE_IC_1, Param_Data_IC_1 );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_SAMPLE_RATE_SETTING_IC_1_ADDR, REG_SAMPLE_RATE_SETTING_IC_1_BYTE, R35_SAMPLE_RATE_SETTING_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DSP_RUN_REGISTER_IC_1_ADDR, REG_DSP_RUN_REGISTER_IC_1_BYTE, R36_DSP_RUN_REGISTER_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DEJITTER_REGISTER_CONTROL_IC_1_ADDR, REG_DEJITTER_REGISTER_CONTROL_IC_1_BYTE, R37_DEJITTER_REGISTER_CONTROL_IC_1_Default );
SIGMA_WRITE_REGISTER_BLOCK( DEVICE_ADDR_IC_1, REG_DEJITTER_REGISTER_CONTROL_IC_1_ADDR, REG_DEJITTER_REGISTER_CONTROL_IC_1_BYTE, R38_DEJITTER_REGISTER_CONTROL_IC_1_Default );
}
hardware
adau176
Hello Ryf,
Gee, this is a strange one. Yes, slowing down the speed really should not make a difference.
Now, I think you are using the ADAU1761 correct? It seems like it is the correct register set and you listed the part as ADAU176.
I see you are waiting for the PLL to lock.
What values of pull ups are you using?
Could the other part be hanging onto the buss and holding one or both lines low or high?
Have you looked at the signals on a scope to get some clue as to what the issue might be?
Also check the address of course. But you said it works fine at higher speeds?
Well, one comment I could make is that if you do not use the address of this other part then the speed does not have to be held to the max speed of this other part. It is not addressed and is not trying to read or write! I think you can run the I2C up to the max of 400kHz if you like. I personally do not like pushing things but try it at the faster rate.
You will only need to slow it down when talking to this other part.
Dave T
I already had a long discussion about the other Device, increasing speed to 400k is not an option, I have to go down to 10k for the other device:
https://pimodules.com/community/ups-pico-hv4-0b/i2c-not-working-properly
My i2c-master is a Raspberry Pi 3 B and should have some pull-ups on board.
The Raspi can't change the baudrate while running, so I need to have the same speed for all my devices from the beginning.
The signals on the bus look quite good for me, also the other device is not holding the bus.
--> One important thing for me:
You said, it should work wirh 10k - right? That's one important statement for me to try some more...
Hello Ryf,
Ryf said:
My i2c-master is a Raspberry Pi 3 B and should have some pull-ups on board.
I would double check that but you may very well be correct. It would be good to know the value but this is not the issue for your problem. You have a good idea what is going on.
Ryf said:
The Raspi can't change the baudrate while running, so I need to have the same speed for all my devices from the beginning
Ah!!! That explains it!! I was going to repeat that if the part is not addressed then it is not active so the rate maters not but if you cannot change it on the host then that is a different story!!
I find that 10k is awfully slow!! 100Khz I would understand better.
I am scratching my head that it seems you are able to program the part fine at a higher rate correct? So I can safely make the assumptions that you are sending the correct chip address and register info etc., etc., etc. Waiting the correct time for PLL lock.
Have a look at the R-Pi datasheet to see if there is some detail that they do not wait long for an ACK? Are you getting any errors? You have not mentioned that you are.
OK, let's do some more troubleshooting. Are you setting the serial audio ports to be a clock master? Because you can check to see if the clock is turning on? Is it the correct frequency? This will tell you that at least the PLL it turning on, the register writes are OK up to the serial port registers.
Also, setup the DSP with an oscillator to send a tone out of the serial port. Then you can see if that is present on the serial port pins using your scope.
You can also send audio out of the analog outputs and see if there is something there?
Do you have GPIO? You get the idea. See what is working and what is not working. The basic theory for troubleshooting. (I teach this at a university)
Have you watched my troubleshooting video on YouTube?
Dave T
Please log in to reply.