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Diffstat (limited to 'peripheral/libmraa/docs/galileorevh.md')
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diff --git a/peripheral/libmraa/docs/galileorevh.md b/peripheral/libmraa/docs/galileorevh.md deleted file mode 100644 index 4afe5fa..0000000 --- a/peripheral/libmraa/docs/galileorevh.md +++ /dev/null @@ -1,56 +0,0 @@ -Galileo Gen 2 - Rev H {#galileorevh} -===================== - -Galileo is a microcontroller board based on the Intel(R) Quark(TM) SoC X1000 -Application Processor, a 32-bit Intel Pentium-class system on a chip. - -The Gen 2 board has the following limitations in libmraa: - -- i2c is set at 400Khz speed cannot be changed without reloading kernel module, - the driver is intel_qrk_gip_i2c and the parameter is i2c_std_mode which must - be set to 1 in order to set the i2c bus speed to 100Khz -- i2c bus is shared with multiple devices in kernel space, scanning it usually - fails -- pwm period is set globally for all pwm channels, when changed this will halt - all pwm channels -- adc kernel module will return 12bit number but the ADC itself only has an - accuracy of 10bits. -- AIO pins are treated as 0-5 in mraa_aio_init() but as 14-19 for everything - else. Therefore use mraa_gpio_init(14) to use A0 as a Gpio - -Uart 1 on gen2 --------------- - -Uart 1 is connected to the FTDI header and the linux console. It's also -possible to use it from A2(Rx)/A3(Tx). However mraa does not support this -directly so you need to enable the muxing manually. Here is an example of how -this is done, this was tested using an FTDI 3.3V TTL cable: - -$ systemctl stop serial-getty@ttyS1.service - -$ python ->>> # Configure the Muxes for Uart1 on Aio2/3 ->>> import mraa as m ->>> p77 = m.Gpio(77, False, True) ->>> p76 = m.Gpio(76, False, True) ->>> p16 = m.Gpio(16, False, True) ->>> p17 = m.Gpio(17, False, True) ->>> p77.write(1) ->>> p76.write(1) ->>> p16.dir(m.DIR_OUT) ->>> p16.write(0) ->>> p17.dir(m.DIR_OUT) ->>> p17.write(1) - ->>> # For Rx to work correctly switch the level shifter ->>> p34 = m.Gpio(34, False, True) ->>> p34.dir(m.DIR_OUT) ->>> p34.write(1) - ->>> # Use the uart ->>> x = m.Uart(1) ->>> x.setBaudRate(115200) ->>> x.writeStr('hello') ->>> x.read(5) -bytearray(b'dsds\n') - |