try:
speed = int(user_speed)
if speed < 0 or speed > 100:
raise InputError
except:
print "enter an speed between 0% and 100%"
return None
match_value = speed * periodValue / 100
return match_value
roboveroConfig()
MCPWM_Init(LPC_MCPWM)
channelsetup = MCPWM_CHANNEL_CFG_Type()
channelsetup.channelType = MCPWM_CHANNEL_EDGE_MODE
channelsetup.channelPolarity = MCPWM_CHANNEL_PASSIVE_HI
channelsetup.channelDeadtimeEnable = DISABLE
channelsetup.channelDeadtimeValue = 0
channelsetup.channelUpdateEnable = ENABLE
channelsetup.channelTimercounterValue = 0
channelsetup.channelPeriodValue = periodValue
channelsetup.channelPulsewidthValue = 0
MCPWM_ConfigChannel(LPC_MCPWM, 0, channelsetup.ptr)
# Disable DC Mode
MCPWM_DCMode(LPC_MCPWM, DISABLE, ENABLE, (0))
