96 lines
2.5 KiB
C
Executable file
96 lines
2.5 KiB
C
Executable file
/* A basic example that demonstrates how UART can be configured.
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Outputs some test data with 100baud, 1.5 stopbits, even parity bit to UART1
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(GPIO2; D4 for NodeMCU boards)
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This sample code is in the public domain.
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*/
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#include <espressif/esp_common.h>
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#include <FreeRTOS.h>
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#include <task.h>
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#include <queue.h>
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#include <esp/uart.h>
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#include <esp/uart_regs.h>
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void uart_send_data(void *pvParameters){
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/* Activate UART for GPIO2 */
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gpio_set_iomux_function(2, IOMUX_GPIO2_FUNC_UART1_TXD);
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/* Set baud rate of UART1 to 100 (so it's easier to measure) */
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uart_set_baud(1, 100);
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/* Set to 1.5 stopbits */
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uart_set_stopbits(1, UART_STOPBITS_1_5);
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/* Enable parity bit */
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uart_set_parity_enabled(1, true);
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/* Set parity bit to even */
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uart_set_parity(1, UART_PARITY_EVEN);
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/* Repeatedly send some example packets */
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for(;;)
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{
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uart_putc(1, 0B00000000);
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uart_putc(1, 0B00000001);
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uart_putc(1, 0B10101010);
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uart_flush_txfifo(1);
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}
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}
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void uart_print_config(void *pvParameters){
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for(;;)
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{
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/* Get data */
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int baud = uart_get_baud(1);
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UART_StopBits stopbits = uart_get_stopbits(1);
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bool parity_enabled = uart_get_parity_enabled(1);
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UART_Parity parity = uart_get_parity(1);
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/* Print to UART0 */
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printf("Baud: %d ", baud);
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switch(stopbits){
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case UART_STOPBITS_0:
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printf("Stopbits: 0 ");
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break;
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case UART_STOPBITS_1:
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printf("Stopbits: 1 ");
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break;
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case UART_STOPBITS_1_5:
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printf("Stopbits: 1.5 ");
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break;
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case UART_STOPBITS_2:
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printf("Stopbits: 2");
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break;
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default:
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printf("Stopbits: Error");
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}
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printf("Parity bit enabled: %d ", parity_enabled);
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switch(parity){
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case UART_PARITY_EVEN:
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printf("Parity: Even");
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break;
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case UART_PARITY_ODD:
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printf("Parity: Odd");
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break;
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default:
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printf("Parity: Error");
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}
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printf("\n");
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vTaskDelay(1000.0 / portTICK_PERIOD_MS);
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}
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}
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void user_init(void){
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uart_set_baud(0, 115200);
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printf("SDK version:%s\n", sdk_system_get_sdk_version());
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xTaskCreate(uart_send_data, "tsk1", 256, NULL, 2, NULL);
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xTaskCreate(uart_print_config, "tsk2", 256, NULL, 3, NULL);
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}
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