Imxssi

SSI test tool, used for audio development purposes on APF9328 and APF27

Installation

$ make menuconfig

Package Selection for the target  --->
    Armadeus specific tools/utilities  --->
        [*] imxssi

Usage

• Requirements:

TSC210x mclk: 16MHZ
FS rate: 32KHz

• U-Boot: Enable i.MX register access from user space in U-Boot:

 BIOS> run unlock_regs

• Linux: Load tsc driver

 # modprobe tsc2102

• imxssi can generate an audio signal. Just use it that way:

 # imxssi [-t type] [-l level] [-s samples] [--loop]

• type can be 0: triangular signal or 1: sinusoïdal signal
• samples: period of the signal in number of samples per channel
• level: Signal level coefficient [0.0 .. 1.0]

For example to produce a 300Hz 5v(pk-pk) sinusoid:

 # imxssi -t 1 -s 50 -l 0.15

• next step: dma transfer

Dump SSI registers

imxregs SCR_1
imxregs SISR_1
imxregs SIER_1
imxregs STCR_1
imxregs SRCR_1
imxregs STCCR_1
imxregs SRCCR_1
imxregs SFCSR_1