32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
#include "resets.h"
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#include "gpio.h"
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#include "uart.h"
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#include "stdio.h"
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#define KEY_PIN (24)
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#define LED_PIN (25)
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int main(void)
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{
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reset_unreset_blocks_wait(RESETS_BLOCK_IO_BANK0 | RESETS_BLOCK_UART0);
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gpio_init(0, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* UART_TX pin */
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gpio_init(1, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* UART_RX pin */
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uart_init(uart0_hw, 6 * 1000 * 1000, UART_DATABITS_8 | UART_PARITY_NONE | UART_STOPBITS_1);
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printf("gpio_key example\r\n");
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gpio_init(LED_PIN, GPIO_FUNC_NULL | GPIO_OVER_OUT_HIGH | GPIO_OVER_OE_ENABLE | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* LED pin */
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gpio_init(KEY_PIN, GPIO_FUNC_NULL | GPIO_PULL_UP | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* KEY pin */
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while (1) {
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if (gpio_read(KEY_PIN)) {
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/* read pin status as 1: release key */
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gpio_clear(LED_PIN); /* low level for turn off LED */
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} else {
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/* read pin status as 0: press key */
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gpio_set(LED_PIN); /* high level for turn on LED */
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}
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}
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return 0;
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}
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