1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _USART_H_ 18 #define _USART_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 #include <gpio.h> 25 #include <stdint.h> 26 27 struct usart; 28 29 typedef uint8_t UsartPort; 30 31 typedef enum 32 { 33 USART_DATA_BITS_8, 34 USART_DATA_BITS_9, 35 } UsartDataBitsCfg; 36 37 typedef enum 38 { 39 USART_STOP_BITS_0_5, 40 USART_STOP_BITS_1_0, 41 USART_STOP_BITS_1_5, 42 USART_STOP_BITS_2_0, 43 } UsatStopBitsCfg; 44 45 typedef enum 46 { 47 USART_PARITY_NONE, 48 USART_PARITY_EVEN, 49 USART_PARITY_ODD, 50 } UsartParityCfg; 51 52 typedef enum 53 { 54 USART_FLOW_CONTROL_NONE, 55 USART_FLOW_CONTROL_RTS, 56 USART_FLOW_CONTROL_CTS, 57 USART_FLOW_CONTROL_RTS_CTS, 58 } UsartFlowControlCfg; 59 60 void usartOpen(struct usart* __restrict usart, UsartPort port, /* port number is 1-based!!!!! */ 61 uint32_t txGpioNum, uint32_t rxGpioNum, 62 uint32_t baud, UsartDataBitsCfg data_bits, 63 UsatStopBitsCfg stop_bits, UsartParityCfg parity, 64 UsartFlowControlCfg flow_control); 65 void usartClose(const struct usart* __restrict usart); 66 void usartPutchar(const struct usart* __restrict usart, char c); 67 68 #ifdef __cplusplus 69 } 70 #endif 71 72 #endif 73 74
