27 lines
728 B
C
27 lines
728 B
C
#include "gpio.h"
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#include "uart.h"
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#include "resets.h"
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#include "stdio.h"
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#define UART_ID uart0_hw
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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(UART_ID, 2 * 1000 * 1000, UART_DATABITS_8 | UART_PARITY_NONE | UART_STOPBITS_1);
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printf("uart_loopback example\r\n");
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while (1) {
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int c = uart_get_char(UART_ID);
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if (c < 0) {
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continue;
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}
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uart_put_char(UART_ID, (uint8_t)c);
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}
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return 0;
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}
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