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https://github.com/cesanta/mongoose.git
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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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#include "main.h"
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int uart_close(int no) {
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return uart_driver_delete(no);
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}
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int uart_open(int no, int rx, int tx, int cts, int rts, int baud) {
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uart_config_t uart_config = {
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.baud_rate = baud,
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.data_bits = UART_DATA_8_BITS,
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.parity = UART_PARITY_DISABLE,
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.stop_bits = UART_STOP_BITS_1,
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.flow_ctrl = cts > 0 && rts > 0 ? UART_HW_FLOWCTRL_CTS_RTS
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: cts > 0 ? UART_HW_FLOWCTRL_CTS
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: rts > 0 ? UART_HW_FLOWCTRL_RTS
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: UART_HW_FLOWCTRL_DISABLE,
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};
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int e1 = uart_param_config(no, &uart_config);
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int e2 = uart_set_pin(no, tx, rx, rts, cts);
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int e3 =
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uart_driver_install(no, UART_FIFO_LEN * 2, UART_FIFO_LEN * 2, 0, NULL, 0);
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MG_INFO(("%d: %d/%d/%d, %d %d %d", no, rx, tx, baud, e1, e2, e3));
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if (e1 != ESP_OK || e2 != ESP_OK || e3 != ESP_OK) return -1;
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return no;
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}
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void uart_init(int tx, int rx, int baud) {
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uart_open(UART_NO, rx, tx, -1, -1, baud);
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}
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int uart_read(void *buf, size_t len) {
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size_t x = 0;
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int no = UART_NO;
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if (uart_get_buffered_data_len(no, &x) != ESP_OK || x == 0) return 0;
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int n = uart_read_bytes(no, buf, len, 10 / portTICK_PERIOD_MS);
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MG_DEBUG(("%d bytes: [%.*s]", n, n, (char *) buf));
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return n;
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}
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int uart_write(const void *buf, int len) {
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int no = UART_NO;
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MG_DEBUG(("%d bytes: [%.*s]", len, len, (char *) buf));
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return uart_write_bytes(no, (const char *) buf, len);
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}
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