Accelerometer sequencer state machine fix and improved response time #3
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The clock is 10MHz and the default div_coef is 10k. This sets the spi clock to 500Hz (1kHz/spi clk transition). The accelerometer spi read spec is 10MHz, so we have plenty of room to speed up the reads. Setting the div_coef to 200 sets the spi clock to 25kHz. It takes 25 iterations to get the new value, so the new response time is about 1ms.
the led assignment was made at the beginning of the spi read, therefore assigning the last result to the leds. the led wait state was added to the sequencer fsm to wait until the spi read is finished, and then it writes the result to the leds.
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For convenience, a compile script was added along with an SPI port definition fix in the testbench. The sequencer also now correctly assigns the LEDs once the SPI read is finished. The SPI read speed was also set to update the LEDs about every 1ms.
stp1.stp