Content originally posted in LPCWare by Thiapalm on Tue Nov 17 10:09:49 MST 2015
Hello,
In LPCOpen, there is no driver for MCPWM, therefore I have imported a LPC43xx CMSIS driver (lpc43xx_mcpwm.c and lpc43xx_mcpwm.h) into my code with proper adaptations.
Is there any example code using that driver (or without it) to enable the PWM for MCOA1?? I am trying to use it for LED control.
So far I am trying to:
1. Init the LPC_MCPWM -> MCPWM_Init(LPC_MCPWM);
2. PinMux -> Chip_SCU_PinMuxSet(0x9, 5, (SCU_MODE_INACT | SCU_MODE_FUNC1));
3. Set CLK_BASE_APB1 clock derived from CLKIN_MAINPLL
4. Mapping the periferal clock CLK_APB1_MOTOCON to CLK_BASE_APB1
5. Enabling CLK_APB1_MOTOCON
6. Config the channel:
channelType = MCPWM_CHANNEL_CENTER_MODE;
channelPolarity = MCPWM_CHANNEL_PASSIVE_HI;
channelDeadtimeEnable = DISABLE;
channelUpdateEnable = ENABLE;
channelTimercounterValue = 0;
channelPulsewidthValue = 100;
channelPeriodValue = 18000;
5. Starting it
However, after the Pinmux, the LED lights up and stays on, even if I change the PulseWidth value.
Can someone help?
Thx
