Outils pour utilisateurs
raspberry_pi:controle_led_rgb
Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente | Dernière révision Les deux révisions suivantes | ||
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raspberry_pi:controle_led_rgb [22/02/2015 05:14] sky99 |
raspberry_pi:controle_led_rgb [22/02/2015 05:15] sky99 |
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|---|---|---|---|
| Ligne 109: | Ligne 109: | ||
| La différence c'est qu'ici, pour allumer une couleur, il faudra mettre le GPIO correspondant à 0. | La différence c'est qu'ici, pour allumer une couleur, il faudra mettre le GPIO correspondant à 0. | ||
| Si le GPIO est à 0, il est à 0V. Donc, le courant entre par l'anode a +3.3V, cela fait une tension de 3.3V au bornes de la DEL. En revanche, si on met le GPIO à 1, il sera à 3.3V. Ce qui fait qu'a chaque borne de la DEL, on a du +3.3V. du coup la tension aux bornes de celle ci est de 0V, et elle reste éteinte! | Si le GPIO est à 0, il est à 0V. Donc, le courant entre par l'anode a +3.3V, cela fait une tension de 3.3V au bornes de la DEL. En revanche, si on met le GPIO à 1, il sera à 3.3V. Ce qui fait qu'a chaque borne de la DEL, on a du +3.3V. du coup la tension aux bornes de celle ci est de 0V, et elle reste éteinte! | ||
| - | Le code est donc inversé, puisqu'il faut passer le GPIO à 0 pour allumer, et à 1 pour éteindre: | + | Le code est donc inversé, puisqu'il faut passer le GPIO à 0 pour allumer, et à 1 pour éteindre. |
| - | <file python colorChangeCC.py > | ||
| - | #!/usr/bin/python | ||
| - | from Adafruit_I2C import Adafruit_I2C | ||
| - | import smbus | ||
| - | import time | ||
| - | MCP23017_IODIRA = 0x00 | ||
| - | MCP23017_IODIRB = 0x01 | ||
| - | MCP23017_GPIOA = 0x12 | ||
| - | MCP23017_GPIOB = 0x13 | ||
| - | MCP23017_GPPUA = 0x0C | ||
| - | MCP23017_GPPUB = 0x0D | ||
| - | MCP23017_OLATA = 0x14 | ||
| - | MCP23017_OLATB = 0x15 | ||
| - | MCP23008_GPIOA = 0x09 | ||
| - | MCP23008_GPPUA = 0x06 | ||
| - | MCP23008_OLATA = 0x0A | ||
| - | class Adafruit_MCP230XX(object): | ||
| - | OUTPUT = 0 | ||
| - | INPUT = 1 | ||
| - | def __init__(self, address, num_gpios, busnum = 0): | ||
| - | assert num_gpios >= 0 and num_gpios <= 16, "Number of GPIOs must be between 0 and 16" | ||
| - | self.i2c = Adafruit_I2C(address=address, bus=smbus.SMBus(busnum)) | ||
| - | self.address = address | ||
| - | self.num_gpios = num_gpios | ||
| - | # set defaults | ||
| - | if num_gpios <= 8: | ||
| - | self.i2c.write8(MCP23017_IODIRA, 0xFF) # all inputs on port A | ||
| - | self.direction = self.i2c.readU8(MCP23017_IODIRA) | ||
| - | self.i2c.write8(MCP23008_GPPUA, 0x00) | ||
| - | elif num_gpios > 8 and num_gpios <= 16: | ||
| - | self.i2c.write8(MCP23017_IODIRA, 0xFF) # all inputs on port A | ||
| - | self.i2c.write8(MCP23017_IODIRB, 0xFF) # all inputs on port B | ||
| - | self.direction = self.i2c.readU8(MCP23017_IODIRA) | ||
| - | self.direction |= self.i2c.readU8(MCP23017_IODIRB) << 8 | ||
| - | self.i2c.write8(MCP23017_GPPUA, 0x00) | ||
| - | self.i2c.write8(MCP23017_GPPUB, 0x00) | ||
| - | | ||
| - | def _changebit(self, bitmap, bit, value): | ||
| - | assert value == 1 or value == 0, "Value is %s must be 1 or 0" % value | ||
| - | if value == 0: | ||
| - | return bitmap & ~(1 << bit) | ||
| - | elif value == 1: | ||
| - | return bitmap | (1 << bit) | ||
| - | def _readandchangepin(self, port, pin, value, currvalue = None): | ||
| - | assert pin >= 0 and pin < self.num_gpios, "Pin number %s is invalid, only 0-%s are valid" % (pin, self.num_gpios) | ||
| - | #assert self.direction & (1 << pin) == 0, "Pin %s not set to output" % pin | ||
| - | if not currvalue: | ||
| - | currvalue = self.i2c.readU8(port) | ||
| - | newvalue = self._changebit(currvalue, pin, value) | ||
| - | self.i2c.write8(port, newvalue) | ||
| - | return newvalue | ||
| - | |||
| - | def pullup(self, pin, value): | ||
| - | if self.num_gpios <= 8: | ||
| - | return self._readandchangepin(MCP23008_GPPUA, pin, value) | ||
| - | if self.num_gpios <= 16: | ||
| - | if (pin < <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/>: | ||
| - | return self._readandchangepin(MCP23017_GPPUA, pin, value) | ||
| - | else: | ||
| - | return self._readandchangepin(MCP23017_GPPUB, pin-8, value) | ||
| - | # Set pin to either input or output mode | ||
| - | def config(self, pin, mode): | ||
| - | if self.num_gpios <= 8: | ||
| - | self.direction = self._readandchangepin(MCP23017_IODIRA, pin, mode) | ||
| - | if self.num_gpios <= 16: | ||
| - | if (pin < <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/>: | ||
| - | self.direction = self._readandchangepin(MCP23017_IODIRA, pin, mode) | ||
| - | else: | ||
| - | self.direction = self._readandchangepin(MCP23017_IODIRB, pin-8, mode) | ||
| - | return self.direction | ||
| - | def output(self, pin, value): | ||
| - | # assert self.direction & (1 << pin) == 0, "Pin %s not set to output" % pin | ||
| - | if self.num_gpios <= 8: | ||
| - | self.outputvalue = self._readandchangepin(MCP23008_GPIOA, pin, value, self.i2c.readU8(MCP23008_OLATA)) | ||
| - | if self.num_gpios <= 16: | ||
| - | if (pin < <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/>: | ||
| - | self.outputvalue = self._readandchangepin(MCP23017_GPIOA, pin, value, self.i2c.readU8(MCP23017_OLATA)) | ||
| - | else: | ||
| - | self.outputvalue = self._readandchangepin(MCP23017_GPIOB, pin-8, value, self.i2c.readU8(MCP23017_OLATB)) | ||
| - | return self.outputvalue | ||
| - | |||
| - | self.outputvalue = self._readandchangepin(MCP23017_IODIRA, pin, value, self.outputvalue) | ||
| - | return self.outputvalue | ||
| - | | ||
| - | def input(self, pin): | ||
| - | assert pin >= 0 and pin < self.num_gpios, "Pin number %s is invalid, only 0-%s are valid" % (pin, self.num_gpios) | ||
| - | assert self.direction & (1 << pin) != 0, "Pin %s not set to input" % pin | ||
| - | if self.num_gpios <= 8: | ||
| - | value = self.i2c.readU8(MCP23008_GPIOA) | ||
| - | elif self.num_gpios > 8 and self.num_gpios <= 16: | ||
| - | value = self.i2c.readU16(MCP23017_GPIOA) | ||
| - | temp = value >> 8 | ||
| - | value <<= 8 | ||
| - | value |= temp | ||
| - | return value & (1 << pin) | ||
| - | def readU8(self): | ||
| - | result = self.i2c.readU8(MCP23008_OLATA) | ||
| - | return(result) | ||
| - | def readS8(self): | ||
| - | result = self.i2c.readU8(MCP23008_OLATA) | ||
| - | if (result > 127): result -= 256 | ||
| - | return result | ||
| - | def readU16(self): | ||
| - | assert self.num_gpios >= 16, "16bits required" | ||
| - | lo = self.i2c.readU8(MCP23017_OLATA) | ||
| - | hi = self.i2c.readU8(MCP23017_OLATB) | ||
| - | return((hi << <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/> | lo) | ||
| - | def readS16(self): | ||
| - | assert self.num_gpios >= 16, "16bits required" | ||
| - | lo = self.i2c.readU8(MCP23017_OLATA) | ||
| - | hi = self.i2c.readU8(MCP23017_OLATB) | ||
| - | if (hi > 127): hi -= 256 | ||
| - | return((hi << <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/> | lo) | ||
| - | def write8(self, value): | ||
| - | self.i2c.write8(MCP23008_OLATA, value) | ||
| - | def write16(self, value): | ||
| - | assert self.num_gpios >= 16, "16bits required" | ||
| - | self.i2c.write8(MCP23017_OLATA, value & 0xFF) | ||
| - | self.i2c.write8(MCP23017_OLATB, (value >> <img src='http://forum.pcinpact.com/public/style_emoticons/<#EMO_DIR#>/lunettes1.gif' class='bbc_emoticon' alt='8)' />/>/>/>/>/>/> & 0xFF) | ||
| - | # RPi.GPIO compatible interface for MCP23017 and MCP23008 | ||
| - | class MCP230XX_GPIO(object): | ||
| - | OUT = 0 | ||
| - | IN = 1 | ||
| - | BCM = 0 | ||
| - | BOARD = 0 | ||
| - | def __init__(self, busnum, address, num_gpios): | ||
| - | self.chip = Adafruit_MCP230XX(busnum, address, num_gpios) | ||
| - | def setmode(self, mode): | ||
| - | # do nothing | ||
| - | pass | ||
| - | def setup(self, pin, mode): | ||
| - | self.chip.config(pin, mode) | ||
| - | def input(self, pin): | ||
| - | return self.chip.input(pin) | ||
| - | def output(self, pin, value): | ||
| - | self.chip.output(pin, value) | ||
| - | def pullup(self, pin, value): | ||
| - | self.chip.pullup(pin, value) | ||
| - | | ||
| - | def lightRGBLed(rState,gState,bState,rPin,gPin,bPin): | ||
| - | mcp.output(rPin, rState) | ||
| - | mcp.output(gPin, gState) | ||
| - | mcp.output(bPin, bState) | ||
| - | |||
| - | def lightRGBLed2(color,rPin,gPin,bPin): | ||
| - | if color == 'red': | ||
| - | lightRGBLed(0,1,1,rPin,gPin,bPin) | ||
| - | elif color == 'green': | ||
| - | lightRGBLed(1,0,1,rPin,gPin,bPin) | ||
| - | elif color == 'blue': | ||
| - | lightRGBLed(1,1,0,rPin,gPin,bPin) | ||
| - | elif color == 'yellow': | ||
| - | lightRGBLed(0,0,1,rPin,gPin,bPin) | ||
| - | elif color == 'magenta': | ||
| - | lightRGBLed(0,1,0,rPin,gPin,bPin) | ||
| - | elif color == 'cyan': | ||
| - | lightRGBLed(1,0,0,rPin,gPin,bPin) | ||
| - | elif color == 'white': | ||
| - | lightRGBLed(0,0,0,rPin,gPin,bPin) | ||
| - | | ||
| - | if __name__ == '__main__': | ||
| - | mcp = Adafruit_MCP230XX(busnum = 1, address = 0x20, num_gpios = 16) | ||
| - | r1=10 | ||
| - | g1=8 | ||
| - | b1=9 | ||
| - | mcp.config(b1, mcp.OUTPUT) | ||
| - | mcp.config(g1, mcp.OUTPUT) | ||
| - | mcp.config(r1, mcp.OUTPUT) | ||
| - | while (True): | ||
| - | |||
| - | print "off" | ||
| - | lightRGBLed(1,1,1,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | | ||
| - | print "rouge" | ||
| - | lightRGBLed(0,1,1,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | | ||
| - | | ||
| - | print "vert" | ||
| - | lightRGBLed(1,0,1,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | |||
| - | print "bleu" | ||
| - | lightRGBLed(1,1,0,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | print "vert+bleu" | ||
| - | lightRGBLed(1,0,0,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | print "rouge+bleu" | ||
| - | lightRGBLed(0,1,0,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | print "rouge+vert" | ||
| - | lightRGBLed(0,0,1,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | print "rouge+vert+bleu" | ||
| - | lightRGBLed(0,0,0,r1,g1,b1) | ||
| - | time.sleep(1) | ||
| - | </file> | ||
raspberry_pi/controle_led_rgb.txt · Dernière modification: 22/02/2015 05:16 par sky99
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