Hi All,
I have an LPXCpresso43S67 board which I finally have working with the LPCxpresso IDE. I want to simply drive one of the GPIOs that goes to the Arduino headers. Looking online I found this pic. below describing the pins. So for example if I wanted to drive P2_13, would the code be? I.e. what is the mapping of ports & pins to those Arduino headers?
Chip_GPIO_SetPinState(LPC_GPIO_PORT, 2, 13, true);
Hi Sean,
Just to make sure, have you download LPCOpen? It contains many code examples.
You said you have an LPCXpresso43S67 board, but the picture you attached is for LPCXpresso4337.
I don't know whether two boards are the same, and I assume you have the first one.
I see P2_13 is in the same position on my board.
You can find the official documents of MCU LPC43S67JET100 on the board at:
LPC43S67JET100|Arm® Cortex-M4/M0|32-bit MCU|NXP
In the data sheet, you can find pin description.
For example, the pin P2_13 is in p. 19. It can be configured as GPIO1[13] in FUNC0.
Therefore, you may try the following code:
Chip_SCU_PinMuxSet(0x2, 13, (SCU_MODE_INACT | SCU_MODE_FUNC0)); /* P2_13 => GPIO1[13] */
Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, 1, 13);
Chip_GPIO_SetPinState(LPC_GPIO_PORT, 1, 13, (bool) true);
Hope this helps.
Frank
Hi Frank,
1. Where does the information "/* P2_13 => GPIO1[13] */" come from?
I can't find it in UM1053 LPC User Manual or LPC4370 Data Sheet.
2. What settings are required for Port 3 Pin 3?
Thanks,
Simon.
Hi Simon,
I am not sure if I understand your problems correctly.
I guess you are trying to make Port 3 Pin 3 on LPC4370 a GPIO pin?
According to the data sheet I found at https://www.nxp.com/docs/en/data-sheet/LPC4370.pdf ,
p. 18 shows that P3_3 cannot be configured as a GPIO pin.
However, if you want to configure P3_4 to a GPIO pin, the above code becomes:
Chip_SCU_PinMuxSet(0x3, 4, (SCU_MODE_INACT | SCU_MODE_FUNC0)); /* P3_4 => GP IO1[14] */
P3_4 => GPIO1[14] comes from the first row of description of P3_4.
Got it?
Regards,
Frank
Thanks Frank.
I was reading things completely back-to-front.
All good now (although slightly embarrassed).
Hi Simon,
Don't be embarrassed, everyone learns like this. :smileyhappy: