topic Re: LPC84x GPIO registers in LPC Microcontrollers

LPC84x GPIO registers

tomato — Wed, 21 Dec 2022 13:49:39 GMT

Hi,

I would like to learn how to toggle a GPIO in the LPC845-brk without high-level sw.

Can you tell me how to know where each pin is mapped in this port register?

For instance which bit i have to set to 1 to put the PIO1_0 pin high?

Thanks in advance

PK_1114 — Thu, 22 Dec 2022 07:54:17 GMT

GPIO Toggle

1. Initialize the Switch matrix CLK. (SYSCON->SYSAHBCLKCTRL0 |= (0x01 << 7);)

2. Initialize the GPIO Direction (GPIO->DIR[0] |=(1<<1);)

3. DE initialize the Switch matrix CLK. (SYSCON->SYSAHBCLKCTRL0 &=~ (0x01 << 7);)

3. in While (1)

{

delay(500) // Some delay of 500ms

GPIO->PIN[0] ^=(1<<1);

}

Thank You,

B PAVAN KUMAR

tomato — Thu, 22 Dec 2022 11:57:10 GMT

Hi Pavan,

Thanks for your reply.

Can you tell me also how to modify a single bit of a register while debugging in MCUxpresso?

PK_1114 — Fri, 23 Dec 2022 13:46:21 GMT

Please Click on the View Menu and Select the Routing Details in that drop down. In that you can select the GPIO state mauvely.

Thank You,

B Pavan Kumar