esp8266的adc实现demo

/* * ESPRSSIF MIT License * * Copyright (c) 2016 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD> * * Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case, * it is free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the Software is furnished * to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include "ets_sys.h" #include "osapi.h" #include "driver/uart.h" #include "osapi.h" #include "driver/uart_register.h" #include "mem.h" #include "os_type.h" // UartDev is defined and initialized in rom code. extern UartDevice UartDev; LOCAL struct UartBuffer* pTxBuffer = NULL; LOCAL struct UartBuffer* pRxBuffer = NULL; /*uart demo with a system task, to output what uart receives*/ /*this is a example to process uart data from task,please change the priority to fit your application task if exists*/ /*it might conflict with your task, if so,please arrange the priority of different task, or combine it to a different event in the same task. */ #define uart_recvTaskPrio 0 #define uart_recvTaskQueueLen 10 os_event_t uart_recvTaskQueue[uart_recvTaskQueueLen]; #define DBG #define DBG1 uart1_sendStr_no_wait #define DBG2 os_printf LOCAL void uart0_rx_intr_handler(void *para); /****************************************************************************** * FunctionName : uart_config * Description : Internal used function * UART0 used for data TX/RX, RX buffer size is 0x100, interrupt enabled * UART1 just used for debug output * Parameters : uart_no, use UART0 or UART1 defined ahead * Returns : NONE *******************************************************************************/ LOCAL void ICACHE_FLASH_ATTR uart_config(uint8 uart_no) { if (uart_no == UART1){ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_U1TXD_BK); }else{ /* rcv_buff size if 0x100 */ ETS_UART_INTR_ATTACH(uart0_rx_intr_handler, &(UartDev.rcv_buff)); PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD); #if UART_HW_RTS PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_U0RTS); //HW FLOW CONTROL RTS PIN #endif #if UART_HW_CTS PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, FUNC_U0CTS); //HW FLOW CONTROL CTS PIN #endif } uart_div_modify(uart_no, UART_CLK_FREQ / (UartDev.baut_rate));//SET BAUDRATE WRITE_PERI_REG(UART_CONF0(uart_no), ((UartDev.exist_parity & UART_PARITY_EN_M) << UART_PARITY_EN_S) //SET BIT AND PARITY MODE | ((UartDev.parity & UART_PARITY_M) <<UART_PARITY_S ) | ((UartDev.stop_bits & UART_STOP_BIT_NUM) << UART_STOP_BIT_NUM_S) | ((UartDev.data_bits & UART_BIT_NUM) << UART_BIT_NUM_S)); //clear rx and tx fifo,not ready SET_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST | UART_TXFIFO_RST); //RESET FIFO CLEAR_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST | UART_TXFIFO_RST); if (uart_no == UART0){ //set rx fifo trigger WRITE_PERI_REG(UART_CONF1(uart_no), ((100 & UART_RXFIFO_FULL_THRHD) << UART_RXFIFO_FULL_THRHD_S) | #if UART_HW_RTS ((110 & UART_RX_FLOW_THRHD) << UART_RX_FLOW_THRHD_S) | UART_RX_FLOW_EN | //enbale rx flow control #endif (0x02 & UART_RX_TOUT_THRHD) << UART_RX_TOUT_THRHD_S | UART_RX_TOUT_EN| ((0x10 & UART_TXFIFO_EMPTY_THRHD)<<UART_TXFIFO_EMPTY_THRHD_S));//wjl #if UART_HW_CTS SET_PERI_REG_MASK( UART_CONF0(uart_no),UART_TX_FLOW_EN); //add this sentense to add a tx flow control via MTCK( CTS ) #endif SET_PERI_REG_MASK(UART_INT_ENA(uart_no), UART_RXFIFO_TOUT_INT_ENA |UART_FRM_ERR_INT_ENA); }else{ WRITE_PERI_REG(UART_CONF1(uart_no),((UartDev.rcv_buff.TrigLvl & UART_RXFIFO_FULL_THRHD) << UART_RXFIFO_FULL_THRHD_S));//TrigLvl default val == 1 } //clear all interrupt WRITE_PERI_REG(UART_INT_CLR(uart_no), 0xffff); //enable rx_interrupt SET_PERI_REG_MASK(UART_INT_ENA(uart_no), UART_RXFIFO_FULL_INT_ENA|UART_RXFIFO_OVF_INT_ENA); } /****************************************************************************** * FunctionName : uart1_tx_one_char * Description : Internal used function * Use uart1 interface to transfer one char * Parameters : uint8 TxChar - character to tx * Returns : OK *******************************************************************************/ STATUS uart_tx_one_char(uint8 uart, uint8 TxChar) { while (true){ uint32 fifo_cnt = READ_PERI_REG(UART_STATUS(uart)) & (UART_TXFIFO_CNT<<UART_TXFIFO_CNT_S); if ((fifo_cnt >> UART_TXFIFO_CNT_S & UART_TXFIFO_CNT) < 126) { break; } } WRITE_PERI_REG(UART_FIFO(uart) , TxChar); return OK; } /****************************************************************************** * FunctionName : uart1_write_char * Description : Internal used function * Do some special deal while tx char is '\r' or '\n' * Parameters : char c - character to tx * Returns : NONE *******************************************************************************/ LOCAL void ICACHE_FLASH_ATTR uart1_write_char(char c) { if (c == '\n'){ uart_tx_one_char(UART1, '\r'); uart_tx_one_char(UART1, '\n'); }else if (c == '\r'){ }else{ uart_tx_one_char(UART1, c); } } //os_printf output to fifo or to the tx buffer LOCAL void ICACHE_FLASH_ATTR uart0_write_char_no_wait(char c) { #if UART_BUFF_EN //send to uart0 fifo but do not wait uint8 chr; if (c == '\n'){ chr = '\r'; tx_buff_enq(&chr, 1); chr = '\n'; tx_buff_enq(&chr, 1); }else if (c == '\r'){ }else{ tx_buff_enq(&c,1); } #else //send to uart tx buffer if (c == '\n'){ uart_tx_one_char_no_wait(UART0, '\r'); uart_tx_one_char_no_wait(UART0, '\n'); }else if (c == '\r'){ } else{ uart_tx_one_char_no_wait(UART0, c); } #endif } /****************************************************************************** * FunctionName : uart0_tx_buffer * Description : use uart0 to transfer buffer * Parameters : uint8 *buf - point to send buffer * uint16 len - buffer len * Returns : *******************************************************************************/ void ICACHE_FLASH_ATTR uart0_tx_buffer(uint8 *buf, uint16 len) { uint16 i; for (i = 0; i < len; i++) { uart_tx_one_char(UART0, buf[i]); } } /****************************************************************************** * FunctionName : uart0_sendStr * Description : use uart0 to transfer buffer * Parameters : uint8 *buf - point to send buffer * uint16 len - buffer len * Returns : ***************************************************************************