So last night, I wanted to see if I could create three TX’s out of the Wemos D1. I was able to accomplish this using the TX/RX swapped to D7/D8, Pin D4 for UART1_TX_BK and USB-COM using TX (After swap is RTS / GPIO1). and Voila! Done. Something to note, With this change I then made my Runtime UART baud at 57600, Anything higher requires the chip to be accurate to a split of a MicroSecond which is difficult when as tiny as you can get us os_delay_us(1) which is a full MicroSecond thus jacking up the timing, at 57600 each bit is sent around 17.3US so being .3 off isn’t too bad compared to being off by .3 when only have 8US sleep time between bits, The error adds up at the end of the 8 bits that can really jack with your result.
Softuart.h
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#ifndef SoftUART_APP_H #define SoftUART_APP_H static inline u8 chbit(u8 data, u8 bit) { if ((data & bit) != 0) { return 1; } else { return 0; } } void sendUART(int GPIO, int command[], int sizeofcmd, long baud) //Did not work { int i=0; int ii=0; system_soft_wdt_feed(); for (i=0; i<sizeofcmd; i++) { gpio_output_set(0, (1 << 2), (1 << 2), 0); os_delay_us(7); for(ii = 0; ii < 8; ii ++ ) { if (chbit(command[i],1<<ii)) { gpio_output_set((1 << 2), 0, (1 << 2), 0); //GPIO_OUTPUT_SET((1 << GPIO), chbit('T',1<<i)); //os_printf("on"); } else { gpio_output_set(0, (1 << 2), (1 << 2), 0); //GPIO_OUTPUT_SET((1 << GPIO), chbit('T',1<<i)); //os_printf("off"); } os_delay_us(7); } gpio_output_set((1 << 2), 0, (1 << 2), 0); //os_delay_us(4); //system_soft_wdt_feed(); } //os_printf("\r\nSignal sent\r\n"); } static int soft_uart_putchar_c(int GPIO, unsigned bit_time, char data) { unsigned i; unsigned start_time = 0x7FFFFFFF & system_get_time(); //Start Bit gpio_output_set(0, (1 << GPIO), 0, 0); //LOW for(i = 0; i <= 8; i ++ ) { while ((0x7FFFFFFF & system_get_time()) < (start_time + (bit_time*(i+1)))) { //If system timer overflow, escape from while loop if ((0x7FFFFFFF & system_get_time()) < start_time){break;} } GPIO_OUTPUT_SET(GPIO_ID_PIN(GPIO), chbit(data,1<<i)); //if GPIO_OUTPUT_SET is all capped it's calling the Macro, if not it's calling a different api } // Stop bit while ((0x7FFFFFFF & system_get_time()) < (start_time + (bit_time*9))) { //If system timer overflow, escape from while loop if ((0x7FFFFFFF & system_get_time()) < start_time){break;} } gpio_output_set((1 << GPIO), 0, 0, 0); // Delay after byte, for new sync os_delay_us(bit_time*6); return 1; } void convert2hex(char buffer[], int length) { int i=0; char itoabuffer[4]; int s=0; for(; s < length; ++s ) { if ((buffer[s] < 32) || (buffer[s] > 126)) { os_printf("\\x"); os_sprintf(itoabuffer, "%X", buffer[s]); for(i=0; i < strlen(itoabuffer); ++i ) { os_printf("%c", itoabuffer[i]); } } else { os_printf("%c", buffer[s]); } } } //You can call this with the following line to redirect PrintF after a UART Swap //os_install_putc1((void *)USBRTS_BAUD57600_write_char); //Redirect OS_PRINTF to UART1, our debug port LOCAL void ICACHE_FLASH_ATTR USBRTS_BAUD57600_write_char(char c) { const unsigned bit_time = (1000000 / 57600); if (c == '\n') { soft_uart_putchar_c(1, bit_time, '\r'); soft_uart_putchar_c(1, bit_time, '\n'); } else if (c == '\r') { } else { soft_uart_putchar_c(1, bit_time, c); } } LOCAL void ICACHE_FLASH_ATTR USBRTS_BAUD57600_write_charToHex(char c) { int i=0; char itoabuffer[4]; if (((c < 32) || (c > 126)) && ((c != 10) && (c != 13))) { //os_printf("\\x"); USBRTS_BAUD57600_write_char('\\'); USBRTS_BAUD57600_write_char('x'); os_sprintf(itoabuffer, "%X", c); for(i=0; i < strlen(itoabuffer); ++i ) { //os_printf("%c", itoabuffer[i]); USBRTS_BAUD57600_write_char(itoabuffer[i]); } } else { //os_printf("%c", c); USBRTS_BAUD57600_write_char(c); } } int softuart_write(int GPIO, const char* data, unsigned len, long baudrate ) { //const unsigned baudrate = 57600; //Highest I've been able to go is 57600 Baud, 115200 misses some but 74880 misses alot const unsigned bit_time = (1000000 / baudrate); gpio_output_set((1 << GPIO), 0, 0, 0); //High os_delay_us(bit_time*8); int s=0; for(; s < len; ++s ) { soft_uart_putchar_c(GPIO, bit_time, data[ s ]); } return 0; } #endif |
main.c
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//https://www.mikrocontroller.net/attachment/263828/The-ESP8266-Book-August-2015.pdf #include "ets_sys.h" #include "osapi.h" #include "gpio.h" #include "os_type.h" #include "ip_addr.h" #include "mem.h" #include "user_interface.h" #include "lwip/stats.h" #include "espconn.h" #include "c_types.h" ////ONE WIRE #include "../library/uart.h" //Copy these from your Driver Lib to your local folder #include "../library/gpio16.h" //Copy these from your Driver Lib to your local folder #include "../library/softuart.h" #include "../library/common.h" /////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////// #define user_procTaskPrio 0 #define user_procTaskQueueLen 1 os_event_t user_procTaskQueue[user_procTaskQueueLen]; void uart0_tx_buffer(uint8 *buf, uint16 len); char rxbuff[31]; char rxindex = 0; void UartReceive(char ByteReceived) { os_printf("[%s] Got UART Callback!\r\n", __func__); os_printf("Byte Recevied: %c\r\n", ByteReceived); rxbuff[rxindex++] = ByteReceived; if (rxindex == sizeof(rxbuff)) { rxindex = 0; } else { os_printf("%d != %d\r\n", rxindex, sizeof(rxbuff)); } os_printf("Buffer: %s\r\n", rxbuff); hex_printf(rxbuff,rxindex); return; } void ICACHE_FLASH_ATTR sdk_init_done_cb(void) { os_printf("[%s] initializing ESP8266!\n", __func__); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1); //Set GPIO1(TX) as a manual GPIO Pin gpio_output_set((1 << 1), 0, (1 << 1), 0); //Set Pin as an OUT and Set it High while(true) { os_printf("test"); uart0_tx_buffer("page 1\xff\xff\xff", 9); //This is our Prod Port uart1_tx_buffer("page 2\xff\xff\xff", 9); //This is our Debug Port softuart_write(1, "This is a test\r\n", 17, 57600); //This is our USB-COM Port delay_second(); delay_second(); } } void ICACHE_FLASH_ATTR SetupUART(void) { //Careful when the callback is triggered that it does not kick off any premature events like sending network packets before the network is connected, thus crashing your app uart_init(BIT_RATE_57600, BIT_RATE_57600, &UartReceive); //This only seems to be kicked off via the COM-USB onboard, Not the TX/RX port system_set_os_print(1); //Turns os_PrintF Log Printing On or Off //We use UART swap because the RXpin is always High from external outputs causing issues when loading new firmware. //Keep in mind uart swap only swaps the RTS and CTS of the same UART to the RX and TX of the same UART, NOT UART1 to UART0 //"UART0 swap. Use MTCK as UART0 Rx, MTDO as UART0 Tx, so ROM log will not output from this new UART0. MTDO (U0RTS) and MTCK (U0CTS) also need to be used as UART0 in hardware system_uart_swap(); //http://smallbits.marshall-tribe.net/blog/2016/11/13/esp8266-quiet-uart - Makes D7 RX (MTCK) and D8 TX (MTDO) //Pick here where you want PrintF to output //os_install_putc1((void *)uart1_write_char); //Redirect OS_PRINTF to UART1 (D4) //os_install_putc1((void *)USBRTS_BAUD57600_write_char); //Redirect OS_PRINTF to USBCOMM, our debug port os_install_putc1((void *)USBRTS_BAUD57600_write_charToHex); //Redirect OS_PRINTF to USBCOMM, our debug port Plus converting nonreadable to hex } void ICACHE_FLASH_ATTR user_init() { SetupUART(); system_init_done_cb(sdk_init_done_cb); wifi_set_opmode(0); wifi_set_sleep_type( NONE_SLEEP_T ); ETS_GPIO_INTR_DISABLE();// Disable gpio interrupts gpio_init(); SetAllGPIOPinsAsOutput(); /* Need to fix this to display value */ uint32 VDDADCByte[4] = {0}; spi_flash_read(0x3fc06b, (uint32 *)&VDDADCByte, 1); //Read pads the other 3 bytes with FF os_printf("\r\n\r\nStarting ESP8266 OTA!\r\nSDK version:%s\r\nLoaded from: %02x\r\nVdd33_Const: %02x\r\n", system_get_sdk_version(), system_get_userbin_addr(), (VDDADCByte[0] & 0xff)); //Turn off LED, We cannot touch this pin as this is our debug pin D4/GPIO2 //PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2); //gpio_output_set((1 << 2), 0, 0, 0); //Start os task system_init_done_cb(sdk_init_done_cb); //system_os_task(loop, user_procTaskPrio, user_procTaskQueue, user_procTaskQueueLen); //Task to Signal for later } |
uart.h
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/* * 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. * */ #ifndef UART_APP_H #define UART_APP_H #include "uart_register.h" #include "eagle_soc.h" //~/esp-open-sdk/xtensa-lx106-elf/sysroot/usr/include <-- pulled from here #include "c_types.h" #include "pin_mux_register.h" //#include "task.h" #define recvTaskPrio 0 #define recvTaskQueueLen 64 #define UART_BUFF_EN 0 //use uart buffer , FOR UART0 #define UART_SELFTEST 0 //set 1:enable the loop test demo for uart buffer, FOR UART0 #define UART_HW_RTS 0 //set 1: enable uart hw flow control RTS, PIN MTDO, FOR UART0 #define UART_HW_CTS 0 //set1: enable uart hw flow contrl CTS , PIN MTCK, FOR UART0 #define UART0 0 #define UART1 1 //calc bit 0..5 for UART_CONF0 register #define CALC_UARTMODE(data_bits,parity,stop_bits) \ (((parity == NONE_BITS) ? 0x0 : (UART_PARITY_EN | (parity & UART_PARITY))) | \ ((stop_bits & UART_STOP_BIT_NUM) << UART_STOP_BIT_NUM_S) | \ ((data_bits & UART_BIT_NUM) << UART_BIT_NUM_S)) //get data_bits from UART_CONF0 register #define GETUART_DATABITS(uartmode) ((uartmode >> UART_BIT_NUM_S) & UART_BIT_NUM) //get stop_bits from UART_CONF0 register #define GETUART_STOPBITS(uartmode) ((uartmode >> UART_STOP_BIT_NUM_S) & UART_STOP_BIT_NUM) //get parity from UART_CONF0 register #define GETUART_PARITYMODE(uartmode) ((uartmode & UART_PARITY_EN) ? uartmode & UART_PARITY : NONE_BITS) typedef enum { FIVE_BITS = 0x0, SIX_BITS = 0x1, SEVEN_BITS = 0x2, EIGHT_BITS = 0x3 } UartBitsNum4Char; typedef enum { ONE_STOP_BIT = 0x1, ONE_HALF_STOP_BIT = 0x2, TWO_STOP_BIT = 0x3 } UartStopBitsNum; typedef enum { NONE_BITS = 0x2, ODD_BITS = 1, EVEN_BITS = 0 } UartParityMode; typedef enum { STICK_PARITY_DIS = 0, STICK_PARITY_EN = 1 } UartExistParity; typedef enum { UART_None_Inverse = 0x0, UART_Rxd_Inverse = UART_RXD_INV, UART_CTS_Inverse = UART_CTS_INV, UART_Txd_Inverse = UART_TXD_INV, UART_RTS_Inverse = UART_RTS_INV, } UART_LineLevelInverse; typedef enum { BIT_RATE_300 = 300, BIT_RATE_600 = 600, BIT_RATE_1200 = 1200, BIT_RATE_2400 = 2400, BIT_RATE_4800 = 4800, BIT_RATE_9600 = 9600, BIT_RATE_19200 = 19200, BIT_RATE_38400 = 38400, BIT_RATE_57600 = 57600, BIT_RATE_74880 = 74880, BIT_RATE_115200 = 115200, BIT_RATE_230400 = 230400, BIT_RATE_460800 = 460800, BIT_RATE_921600 = 921600, BIT_RATE_1843200 = 1843200, BIT_RATE_3686400 = 3686400, } UartBautRate; typedef enum { NONE_CTRL, HARDWARE_CTRL, XON_XOFF_CTRL } UartFlowCtrl; typedef enum { USART_HardwareFlowControl_None = 0x0, USART_HardwareFlowControl_RTS = 0x1, USART_HardwareFlowControl_CTS = 0x2, USART_HardwareFlowControl_CTS_RTS = 0x3 } UART_HwFlowCtrl; typedef enum { EMPTY, UNDER_WRITE, WRITE_OVER } RcvMsgBuffState; typedef struct { uint32 RcvBuffSize; uint8 *pRcvMsgBuff; uint8 *pWritePos; uint8 *pReadPos; uint8 TrigLvl; //JLU: may need to pad RcvMsgBuffState BuffState; } RcvMsgBuff; typedef struct { uint32 TrxBuffSize; uint8 *pTrxBuff; } TrxMsgBuff; typedef enum { BAUD_RATE_DET, WAIT_SYNC_FRM, SRCH_MSG_HEAD, RCV_MSG_BODY, RCV_ESC_CHAR, } RcvMsgState; typedef struct { UartBautRate baut_rate; UartBitsNum4Char data_bits; UartExistParity exist_parity; UartParityMode parity; UartStopBitsNum stop_bits; UartFlowCtrl flow_ctrl; RcvMsgBuff rcv_buff; TrxMsgBuff trx_buff; RcvMsgState rcv_state; int received; int buff_uart_no; //indicate which uart use tx/rx buffer } UartDevice; //void uart_init(UartBautRate uart0_br, UartBautRate uart1_br); void uart_init(UartBautRate uart0_br, UartBautRate uart1_br, void * callback); void uart0_sendStr(const char *str); /////////////////////////////////////// struct UartBuffer{ uint32 UartBuffSize; uint8 *pUartBuff; uint8 *pInPos; uint8 *pOutPos; STATUS BuffState; uint16 Space; //remanent space of the buffer uint8 TcpControl; struct UartBuffer * nextBuff; }; struct UartRxBuff{ uint32 UartRxBuffSize; uint8 *pUartRxBuff; uint8 *pWritePos; uint8 *pReadPos; STATUS RxBuffState; uint32 Space; //remanent space of the buffer } ; typedef enum { RUN = 0, BLOCK = 1, } TCPState; //void ICACHE_FLASH_ATTR uart_test_rx(); //STATUS uart_tx_one_char(uint8 uart, uint8 TxChar); STATUS uart_tx_one_char_no_wait(uint8 uart, uint8 TxChar); void uart1_sendStr_no_wait(const char *str); struct UartBuffer* Uart_Buf_Init(); #if UART_BUFF_EN LOCAL void Uart_Buf_Cpy(struct UartBuffer* pCur, char* pdata , uint16 data_len); void uart_buf_free(struct UartBuffer* pBuff); void tx_buff_enq(char* pdata, uint16 data_len ); LOCAL void tx_fifo_insert(struct UartBuffer* pTxBuff, uint8 data_len, uint8 uart_no); void tx_start_uart_buffer(uint8 uart_no); uint16 rx_buff_deq(char* pdata, uint16 data_len ); void Uart_rx_buff_enq(); #endif void uart_rx_intr_enable(uint8 uart_no); void uart_rx_intr_disable(uint8 uart_no); void uart0_tx_buffer(uint8 *buf, uint16 len); //============================================== #define FUNC_UART0_CTS 4 #define FUNC_U0CTS 4 #define FUNC_U1TXD_BK 2 #define UART_LINE_INV_MASK (0x3f<<19) void UART_SetWordLength(uint8 uart_no, UartBitsNum4Char len); void UART_SetStopBits(uint8 uart_no, UartStopBitsNum bit_num); void UART_SetLineInverse(uint8 uart_no, UART_LineLevelInverse inverse_mask); void UART_SetParity(uint8 uart_no, UartParityMode Parity_mode); void UART_SetBaudrate(uint8 uart_no,uint32 baud_rate); void UART_SetFlowCtrl(uint8 uart_no,UART_HwFlowCtrl flow_ctrl,uint8 rx_thresh); void UART_WaitTxFifoEmpty(uint8 uart_no , uint32 time_out_us); //do not use if tx flow control enabled void UART_ResetFifo(uint8 uart_no); void UART_ClearIntrStatus(uint8 uart_no,uint32 clr_mask); void UART_SetIntrEna(uint8 uart_no,uint32 ena_mask); void UART_SetPrintPort(uint8 uart_no); bool UART_CheckOutputFinished(uint8 uart_no, uint32 time_out_us); //============================================== #endif /* * File : uart.c * This file is part of Espressif's AT+ command set program. * Copyright (C) 2013 - 2016, Espressif Systems * * This program is free software: you can redistribute it and/or modify * it under the terms of version 3 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program. If not, see <http://www.gnu.org/licenses/>. */ /*#include "ets_sys.h" #include "osapi.h" #include "driver/uart.h" #include "osapi.h" #include "driver/uart_register.h" //#include "ssc.h" #include "task.h" */ // UartDev is defined and initialized in rom code. extern UartDevice UartDev; //extern os_event_t at_recvTaskQueue[at_recvTaskQueueLen]; 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, void * callback(uint8)) { os_printf("uart_config:%d", uart_no); if (uart_no == UART0) { /* UART0 */ ETS_UART_INTR_ATTACH(uart0_rx_intr_handler, callback); PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD); //Enable RxD pin PIN_PULLUP_EN(PERIPHS_IO_MUX_U0RXD_U); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD); //PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_U0RTS); //We don't use RTS } else { PIN_PULLUP_DIS(PERIPHS_IO_MUX_GPIO2_U); PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_U1TXD_BK); //D4 used for Debug out. PIN_PULLUP_EN(PERIPHS_IO_MUX_GPIO2_U); } uart_div_modify(uart_no, UART_CLK_FREQ / (UartDev.baut_rate)); WRITE_PERI_REG(UART_CONF0(uart_no), CALC_UARTMODE(EIGHT_BITS, NONE_BITS, ONE_STOP_BIT)); //clear rx and tx fifo,not ready SET_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST | UART_TXFIFO_RST); CLEAR_PERI_REG_MASK(UART_CONF0(uart_no), UART_RXFIFO_RST | UART_TXFIFO_RST); WRITE_PERI_REG(UART_CONF1(uart_no), ((UartDev.rcv_buff.TrigLvl & UART_RXFIFO_FULL_THRHD) << UART_RXFIFO_FULL_THRHD_S)); //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); } /****************************************************************************** * FunctionName : uart1_tx_one_char * Description : Internal used function * Use uart1 interface to transfer one char * Parameters : uint8 TxChar - character to tx * Returns : OK *******************************************************************************/ LOCAL 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); } } /****************************************************************************** * 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_tx_buffer * Description : use uart0 to transfer buffer * Parameters : uint8 *buf - point to send buffer * uint16 len - buffer len * Returns : *******************************************************************************/ void ICACHE_FLASH_ATTR uart1_tx_buffer(uint8 *buf, uint16 len) { uint16 i; for (i = 0; i < len; i++) { uart_tx_one_char(UART1, buf[i]); } } /****************************************************************************** * FunctionName : uart0_sendStr * Description : use uart0 to transfer buffer * Parameters : uint8 *buf - point to send buffer * uint16 len - buffer len * Returns : *******************************************************************************/ void ICACHE_FLASH_ATTR uart0_sendStr(const char *str) { while(*str) { uart_tx_one_char(UART0, *str++); } } /****************************************************************************** * FunctionName : uart0_rx_intr_handler * Description : Internal used function * UART0 interrupt handler, add self handle code inside * Parameters : void *para - point to ETS_UART_INTR_ATTACH's arg * Returns : NONE *******************************************************************************/ typedef void (*UARTFunctionCallback)(char ByteReceived); UARTFunctionCallback UARTCallback; LOCAL void uart0_rx_intr_handler(void * para) { char RcvChar[0]; //If I remove pRXbuff my program crashes, This may be due to not enough stackspace RcvMsgBuff *pRxBuff = (RcvMsgBuff *)para; //This is now a Callback pointer if (UART_RXFIFO_FULL_INT_ST != (READ_PERI_REG(UART_INT_ST(UART0)) & UART_RXFIFO_FULL_INT_ST)) { return; } WRITE_PERI_REG(UART_INT_CLR(UART0), UART_RXFIFO_FULL_INT_CLR); while (READ_PERI_REG(UART_STATUS(UART0)) & (UART_RXFIFO_CNT << UART_RXFIFO_CNT_S)) { ETS_UART_INTR_DISABLE(); RcvChar[0] = READ_PERI_REG(UART_FIFO(UART0)) & 0xFF; /* you can add your handle code below.*/ UARTCallback = para; UARTCallback(RcvChar[0]); /* gpio_output_set((1 << 2), 0, 0, 0); uart0_tx_buffer(RcvChar, 1); if (RcvChar[0] == '\n') { gpio_output_set(0, (1 << 2), 0, 0); uart0_sendStr("\r\nGot enter N\r\n"); } if (RcvChar[0] == '\r') { gpio_output_set(0, (1 << 2), 0, 0); uart0_sendStr("\r\nGot enter R\r\n"); } */ // Clear pending FIFO interrupts WRITE_PERI_REG(UART_INT_CLR(UART0), UART_RXFIFO_TOUT_INT_CLR | UART_RXFIFO_FULL_INT_ST); ETS_UART_INTR_ENABLE(); } } /****************************************************************************** * FunctionName : uart_init * Description : user interface for init uart * Parameters : UartBautRate uart0_br - uart0 bautrate * UartBautRate uart1_br - uart1 bautrate * Returns : NONE *******************************************************************************/ void ICACHE_FLASH_ATTR uart_init(UartBautRate uart0_br, UartBautRate uart1_br, void * callback) { // rom use 74880 baut_rate, here reinitialize UartDev.baut_rate = uart0_br; uart_config(UART0, callback); UartDev.baut_rate = uart1_br; uart_config(UART1, callback); ETS_UART_INTR_ENABLE(); // install uart1 putc callback //system_uart_swap(); //http://smallbits.marshall-tribe.net/blog/2016/11/13/esp8266-quiet-uart //PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_U1TXD_BK); //os_install_putc1((void *)uart1_write_char); } void ICACHE_FLASH_ATTR uart_reattach() { uart_init(BIT_RATE_74880, BIT_RATE_74880, NULL); // ETS_UART_INTR_ATTACH(uart_rx_intr_handler_ssc, &(UartDev.rcv_buff)); // ETS_UART_INTR_ENABLE(); } |