Alcor6L/eLua/pio

Overview This module contains functions for accessing the CPU's PIO (Programmable Input Output) pins. It contains two set of functions with identical names and behaviour. One set groups the functions used to access individual pins from ports, the other groups the functions used to access full ports. With the pio module, you specifiy names of ports as they appear in your eLua's CPU datasheet. For example, if your CPU's ports are named PA, PB and PC, you can refer to them using pio.PA, pio.PB and pio.PC, respectively. If your CPU uses P0, P1, P2 instead of PA, PB and PC, you can simply use pio.P0, pio.P1 and pio.P2 instead. You can also refer to individual pins instead of ports. With the same notation as above, pio.PA_0 refers to the first pin of port PA, pio.P0_15 refers to the 16th pin of port P0 and so on. Functions pio.pin.setdir Set pin(s) direction pio.pin.setdir( direction, pin1, pin2, ..., pinn ) pio.pin.setdir( direction, pin1, pin2, ..., pinn ) direction - the pin direction, can be either pio.INPUT or pio.OUTPUT pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: nothing. pio.pin.setpull Enable/disable pullups/pulldowns on the specified pin(s) pio.pin.setpull( type, pin1, pin2, ..., pinn ) type - 'pull' type, can be either pio.PULLUP to enable pullups, pio.PULLDOWN to enable pulldowns, or pio.NOPULL to disable both pullups and pulldowns pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: nothing. pio.pin.setval Set pin(s) value pio.pin.setval( value, pin1, pin2, ..., pinn ) value - pin value, can be either 0 or 1 pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: nothing. pio.pin.getval Get value of pin(s) val1, val2, ..., valn = pio.pin.getval( pin1, pin2, ..., pinn ) pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: The value(s) of the pin(s), either 0 or 1 pio.pin.sethigh Set pin(s) to 1 (high) pio.pin.sethigh( pin1, pin2, ..., pinn ) pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: nothing. pio.pin.setlow Set pin(s) to 0 (low) pio.pin.setlow( pin1, pin2, ..., pinn ) pin1 - the first pin pin2 (optional) - the second pin pinn (optional) - the n-th pin Returns: nothing. pio.port.setdir Set port(s) direction pio.port.setdir( direction, port1, port2, ..., portn ) direction - the port direction, can be either pio.INPUT or pio.OUTPUT port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: nothing. pio.port.setpull Enable/disable pullups/pulldowns on the specified port(s) pio.port.setpull( type, port1, port2, ..., portn ) type - 'pull' type, can be either pio.PULLUP to enable pullups, pio.PULLDOWN to enable pulldowns, or pio.NOPULL to disable both pullups and pulldowns port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: nothing. pio.port.setval Set port(s) value pio.port.setval( value, port1, port2, ..., portn ) value - port value port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: nothing. pio.port.getval Get value of port(s) val1, val2, ..., valn = pio.port.getval( port1, port2, ..., portn ) port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: The value(s) of the port(s) pio.port.sethigh Set port(s) to all 1 (high) pio.port.sethigh( port1, port2, ..., portn ) port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: nothing. pio.port.setlow Set port(s) to all 0 (low) pio.port.setlow( port1, port2, ..., portn ) port1 - the first port port2 (optional) - the second port portn (optional) - the n-th port Returns: nothing. pio.decode Convert a PIO resource number to the corresponding port and pin. This is most commonly used in GPIO edge interrupt routines to convert the Lua interrupt routine's argument to the port and pin that caused the interrupt but it can also be used on the values returned by the pin names pio.PA_0, pio.P2_15 and so on. port, pin = pio.decode( resnum ) resnum - the resource number of the pin Returns: port - the index of the port, starting from 0 (so port A is 0, port B is 1 and so on) pin - the pin number, usually from 0 to 31