125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
// vim: set et:
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Raspberry Pi (Trading) Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <pico/binary_info.h>
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#include <pico/stdlib.h>
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#include <tusb.h>
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#include "m_default/bsp-feature.h"
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#include "m_default/pinout.h"
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#include "m_default/cdc.h"
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static uint8_t rx_buf[CFG_TUD_CDC_RX_BUFSIZE];
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static uint8_t tx_buf[CFG_TUD_CDC_TX_BUFSIZE];
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static bool hwflow = false;
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static int lc_brate = PINOUT_UART_BAUDRATE,
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lc_data = 8, lc_parity = 0, lc_stop = 1;
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void cdc_uart_init(void) {
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/*lc_brate = PINOUT_UART_BAUDRATE;
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lc_data = 8;
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lc_parity = 0;
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lc_stop = 1;
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hwflow = false;*/
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gpio_set_function(PINOUT_UART_TX, GPIO_FUNC_UART);
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gpio_set_function(PINOUT_UART_RX, GPIO_FUNC_UART);
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uart_init(PINOUT_UART_INTERFACE, lc_brate/*PINOUT_UART_BAUDRATE*/);
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uart_set_hw_flow(PINOUT_UART_INTERFACE, hwflow, hwflow);
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uart_set_format(PINOUT_UART_INTERFACE, lc_data, lc_stop, lc_parity);
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bi_decl(bi_2pins_with_func(PINOUT_UART_TX, PINOUT_UART_RX, GPIO_FUNC_UART));
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}
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void cdc_uart_deinit(void) {
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uart_deinit(PINOUT_UART_INTERFACE);
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gpio_set_function(PINOUT_UART_TX, GPIO_FUNC_NULL);
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gpio_set_function(PINOUT_UART_RX, GPIO_FUNC_NULL);
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}
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void cdc_uart_task(void) {
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if (cdc_uart_dap_override) return;
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// Consume uart fifo regardless even if not connected
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uint rx_len = 0;
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while (uart_is_readable(PINOUT_UART_INTERFACE) && (rx_len < sizeof(rx_buf))) {
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rx_buf[rx_len++] = uart_getc(PINOUT_UART_INTERFACE);
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}
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if (tud_cdc_n_connected(CDC_N_UART)) {
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// Do we have anything to display on the host's terminal?
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if (rx_len) {
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for (uint i = 0; i < rx_len; i++) { tud_cdc_n_write_char(CDC_N_UART, rx_buf[i]); }
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tud_cdc_n_write_flush(CDC_N_UART);
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}
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if (tud_cdc_n_available(CDC_N_UART)) {
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// Is there any data from the host for us to tx
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uint tx_len = tud_cdc_n_read(CDC_N_UART, tx_buf, sizeof(tx_buf));
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uart_write_blocking(PINOUT_UART_INTERFACE, tx_buf, tx_len);
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}
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}
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}
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bool cdc_uart_get_hwflow(void) {
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return hwflow;
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}
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bool cdc_uart_set_hwflow(bool enable) {
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hwflow = enable;
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//uart_set_hw_flow(PINOUT_UART_INTERFACE, enable, enable);
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return true;
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}
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uint32_t cdc_uart_set_coding(uint32_t brate,
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uint8_t stop, uint8_t parity, uint8_t data) {
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// tusb: parity: 0=none 1=odd 2=even 3=mark 4=space
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// pîco: parity: 0=none 1=even 2=odd
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int picopar = 0;
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switch (parity) {
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case 0: break;
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case 2: picopar = 1; break;
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case 1: picopar = 2; break;
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default: picopar = lc_parity; break;
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}
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// FIXME: this is broken fsr
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/*uart_set_format(PINOUT_UART_INTERFACE, data, stop, picopar);
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lc_data = data;
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lc_parity = picopar;
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lc_stop = stop;*/
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return (lc_brate = uart_set_baudrate(PINOUT_UART_INTERFACE, brate));
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}
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// idk where to put this otherwise
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bi_decl(bi_program_feature("Mode 1: UART"));
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bi_decl(bi_program_feature("Mode 1: CMSIS-DAP"));
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bi_decl(bi_program_feature("Mode 1: SPI"));
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bi_decl(bi_program_feature("Mode 1: I2C"));
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bi_decl(bi_program_feature("Mode 1: temperature sensor"));
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