493 lines
15 KiB
C
493 lines
15 KiB
C
// Haybin_Wu
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// Shenitech-RD
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// 2016.5
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// Built with IAR Embedded Workbench v6.2
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//******************************************************************************
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// Modify by Qian Xianghong
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// 2020.10
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// 修改日志：将无线模块做成串口和RF双向透传模式。
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//******************************************************************************
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#include <msp430FR2433.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "FR2433-RFSX.h"
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#include "RF_SX1276.h"
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// 射频配置参数
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lora_param_t Lora_Param;
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#define TRAN_BUF_SIZE (1024)
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// 用UA1串口做打印输出，方便调试
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char printBuf[200];
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void uart_print()
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{
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#if 0 // 打印串口的2个引脚用作MD0、MD1模式选择
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char *p = printBuf;
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while(*p)
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{
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if(*p == '\n') // 换行前添加回车
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{
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while(!(UCA1IFG & UCTXIFG));
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UCA1TXBUF = '\r';
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}
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while(!(UCA1IFG & UCTXIFG));
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UCA1TXBUF = *p++;
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}
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#endif
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}
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// 可变参数的宏定义
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#define PRINTF(format, ...) \
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{ \
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snprintf(printBuf, sizeof(printBuf), format, ##__VA_ARGS__); \
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uart_print(); \
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}
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// UA0接收上位机数据的buf
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uint8_t UA0_RxBuf[TRAN_BUF_SIZE] = {0};
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uint16_t UA0_RxBuf_Length = 0;
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uint16_t UA0_RxBuf_offset = 0;
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// UA0接收超时
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volatile uint8_t UA0_Rx_Timeout = 1;
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// RF接收数据的buf
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uint8_t RF_RxBuf[TRAN_BUF_SIZE] = {0};
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uint16_t RF_RxBuf_Length = 0;
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uint16_t RF_RxBuf_offset = 0;
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// RF接收超时标志
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volatile uint8_t RF_Rx_Timeout = 1;
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////////////////////////////////////////////////////////////////////////////////
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// 主串口初始化
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void UA0_Init(uint32_t baudrate)
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{
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// Configure UART
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UCA0CTLW0 |=(UCSSEL__SMCLK+UCSWRST);//UCPEN+UCPAR+
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// Baud Rate calculation
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if(baudrate == 115200)
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{
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UCA0BR0 = 4; // 8000000/16/115200//这位大于16 UCOS16位要置位
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UCA0BR1 = 0; // Fractional portion = 0.44444
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UCA0MCTLW = 0x5500 | UCOS16 | UCBRF_5;//微调Baud Rate
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}
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else if(baudrate == 38400)
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{
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UCA0BR0 = 13; // 8000000/16/38400 /这位大于16 UCOS16位要置位
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UCA0BR1 = 0; // Fractional portion = 0.33333
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UCA0MCTLW = 0x8400 | UCOS16 | UCBRF_0;//微调Baud Rate
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}
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else
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{
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UCA0BR0 = 52; // 8000000/16/9600 /这位大于16 UCOS16位要置位
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UCA0BR1 = 0; // Fractional portion = 0.33333
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UCA0MCTLW = 0x4900 | UCOS16 | UCBRF_1;//微调Baud Rate
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}
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UCA0CTLW0 &= ~UCSWRST; // Initialize eUSCI
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UCA0IE |= UCRXIE; // Enable USCI_A0 RX interrupt
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}
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// 主串口应答（配置命令）
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void UA0_Response(char *s)
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{
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while(*s)
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{
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while(!(UCA0IFG & UCTXIFG));
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UCA0TXBUF = *s++;
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}
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// 等待发送结束
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while(!(UCA0IFG & UCTXCPTIFG));
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DelayMs(2);
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}
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////////////////////////////////////////////////////////////////////////////////
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//主函数
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////////////////////////////////////////////////////////////////////////////////
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int main(void)
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{
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uint8_t sendCh;
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WDTCTL = (WDTPW | WDTHOLD); // Stop WDT
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// Port Configuration all un-used pins to output low
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P1DIR = 0xFF; P2DIR = 0xFF; P3DIR = 0xFF;
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P1OUT = 0x00; P2OUT = 0x00; P3OUT = 0x00;
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PM5CTL0 &= ~LOCKLPM5;//开引脚功能
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// Configure DCO Clock
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//外部时钟源启动
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P2SEL0 |= (BIT0 | BIT1); // set XT1 pin as second function
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do
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{
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CSCTL7 &= ~(XT1OFFG | DCOFFG); // Clear XT1 and DCO fault flag
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SFRIFG1 &= ~OFIFG;
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} while (SFRIFG1 & OFIFG); // Test oscillator fault flag
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//上面清除标志有助于降低功耗
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__bis_SR_register(SCG0); // disable FLL
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CSCTL3 |= SELREF__XT1CLK; // 外部 32768hz reference source
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CSCTL0 = 0; // clear DCO and MOD registers
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CSCTL1 &= ~(DCORSEL_7); // Clear DCO frequency select bits first
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CSCTL1 |= DCORSEL_3; //DCO=8Mhz
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CSCTL2 = FLLD_0 + 243; // DCODIV = 8MHz
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__delay_cycles(3);
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__bic_SR_register(SCG0); // enable FLL
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while(CSCTL7 & (FLLUNLOCK0 | FLLUNLOCK1)); // Poll until FLL is locked
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CSCTL4 = SELREF__XT1CLK + SELMS__DCOCLKDIV;// set XT1CLK(32768Hz) as ACLK source & MCLK/SMCLK=DCO
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//Timer0_A0 setup
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TA0CCTL0 = CCIE; // TACCR0 interrupt enabled
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TA0CCR0 = 32768 / 32; // 串口接收超时: 1000/32=31.25ms
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TA0CTL = MC__STOP | TACLR; // Stop mode, Clear counter
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//Timer1_A0 setup
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TA1CCTL0 = CCIE; // TACCR0 interrupt enabled
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TA1CCR0 = 32768 / 4; // RF接收超时: 1000/4=250ms
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TA1CTL = MC__STOP | TACLR; // Stop mode, Clear counter
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// 设置无线模块缺省参数
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Lora_Param.sof = 0xC2;
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Lora_Param.addr = 0xADF2; // 通信地址0xADF2
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Lora_Param.sf = 6; // sf=12
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Lora_Param.baud = 3; // 9600
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Lora_Param.cr = 0; // cr=4/5
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Lora_Param.ch = 9; // 479MHz
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Lora_Param.power = 1; // 17dBm
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Lora_Param.freqcast = 0; // freqcast off
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Lora_Param.bw = 9; // 500kHz
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Lora_Param.unicast = 0; // unicast off
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// Configure UART pins
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P1SEL1 &= ~(BIT4 | BIT5); // set 2-UART pin as second function
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P1SEL0 |= (BIT4 | BIT5); // set 2-UART pin as second function
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if(Lora_Param.baud == 7)
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UA0_Init(115200);
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else if(Lora_Param.baud == 5)
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UA0_Init(38400);
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else
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UA0_Init(9600);
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#if 0 // 配置打印串口
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// Configure UART pins
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P2SEL1 &= ~(BIT5 | BIT6); // set 2-UART pin as second function
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P2SEL0 |= (BIT5 | BIT6); // set 2-UART pin as second function
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// Configure UART
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UCA1CTLW0 |=(UCSSEL__SMCLK+UCSWRST);//UCPEN+UCPAR+
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// Baud Rate calculation
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UCA1BR0 = 4; // 8000000/16/115200//这位大于16 UCOS16位要置位
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UCA1BR1 = 0; // Fractional portion = 0.44444
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UCA1MCTLW = 0x5500 | UCOS16 | UCBRF_5;//微调Baud Rate
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UCA1CTLW0 &= ~UCSWRST; // Initialize eUSCI
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UCA1IE |= UCRXIE; // Enable USCI_A0 RX interrupt
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// 打印复位原因(电源引起，不包括看门狗)
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PRINTF("\nModule reseted: %04X\n", PMMIFG);
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#else // 配置MD0、MD1模式
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P2SEL1 &= ~(BIT3 | BIT5 | BIT6); // set 2-UART pin as GPIO
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P2SEL0 &= ~(BIT3 | BIT5 | BIT6); // set 2-UART pin as GPIO
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P2DIR &= ~(BIT5 | BIT6); // Input
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P2REN |= (BIT5 | BIT6); // enable pull
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P2OUT &= ~(BIT5 | BIT6); // pull-down
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P2DIR |= BIT3; // Output
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P2OUT |= BIT3; // Output high
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#endif
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_EINT();
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#if 0
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// 打印复位原因(电源引起，不包括看门狗)
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RF_RxBuf[0] = PMMIFG >> 8;
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RF_RxBuf[1] = PMMIFG & 0xFF;
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RF_RxBuf_Length = 2;
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RF_RxBuf_offset = 0;
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UCA0IE |= UCTXIE;
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while(UCA0IE & UCTXIE);
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#endif
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// 读寄存器，清除复位原因
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SYSRSTIV;
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//无线模块初始化
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uint8_t try_count = 3; //最多初始化3次
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while(try_count)
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{
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if(SX127x_initLora(&Lora_Param) == NORMAL)
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break;
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try_count--;
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}
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if(try_count == 0) //无线初始化失败处理
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{
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//P3OUT ^= 0xC0;
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LPM4;
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}
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// 初始处于接收模式
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LSD_RF_RXmode(RF_PAYLOAD_LEN);
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// 默认发送信道
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sendCh = Lora_Param.ch;
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// 开启看门狗: 超时时间为2^27/SMCLK，在8000000主频下约为16s
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WDTCTL = (WDTPW | WDTCNTCL | WDTIS_1);
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while(1)
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{
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#if 1
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// TODO: 喂狗
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WDTCTL = (WDTPW | WDTCNTCL | WDTIS_1);
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// 配置模式
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if((P2IN & (BIT5 | BIT6)) == (BIT5 | BIT6))
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{
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if(UA0_RxBuf_Length - UA0_RxBuf_offset >= sizeof(Lora_Param))
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{
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if(UA0_RxBuf[UA0_RxBuf_offset] == 0xC2)
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{
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// 保存参数
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memmove(&Lora_Param, UA0_RxBuf + UA0_RxBuf_offset, sizeof(Lora_Param));
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// 颠倒地址高低字节
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Lora_Param.addr = (Lora_Param.addr << 8) | (Lora_Param.addr >> 8);
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//无线模块初始化
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uint8_t try_count = 3; //最多初始化3次
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while(try_count)
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{
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// 其它参数有变化，无线模块初始化
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if(SX127x_initLora(&Lora_Param) == NORMAL)
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break;
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try_count--;
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}
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if(try_count == 0) //无线初始化失败处理
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{
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//P3OUT ^= 0xC0;
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LPM4;
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}
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// 默认处于接收模式
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LSD_RF_RXmode(RF_PAYLOAD_LEN);
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// 默认发送信道
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sendCh = Lora_Param.ch;
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// 应答配置命令
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UA0_Response("OK\r\n");
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// 改变串口波特率
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if(Lora_Param.baud == 7)
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UA0_Init(115200);
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else if(Lora_Param.baud == 5)
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UA0_Init(38400);
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else
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UA0_Init(9600);
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}
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UA0_RxBuf_offset = UA0_RxBuf_Length;
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}
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}
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// 透传模式
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else if((P2IN & (BIT5 | BIT6)) == 0)
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#endif
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{
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if(UA0_RxBuf_Length > UA0_RxBuf_offset)
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{
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// 定点传输，指定目标地址和信道发送
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if(Lora_Param.unicast) // 定点发送
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{
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if(UA0_RxBuf_offset == 0 && UA0_RxBuf_Length > 3)
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sendCh = UA0_RxBuf[2];
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}
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else if(Lora_Param.freqcast) // 指定信道发送
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{
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if(UA0_RxBuf_offset == 0 && UA0_RxBuf_Length > 1)
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{
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sendCh = UA0_RxBuf[0];
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Lora_Param.ch= UA0_RxBuf[1];
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UA0_RxBuf_offset = 2; // 不发送第1发个字节
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}
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}
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if(UA0_RxBuf_Length - UA0_RxBuf_offset >= RF_PAYLOAD_LEN)
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{
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LSD_RF_FreqSet(sendCh);
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LSD_RF_SendPacket(UA0_RxBuf + UA0_RxBuf_offset, RF_PAYLOAD_LEN);
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UA0_RxBuf_offset += RF_PAYLOAD_LEN;
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PRINTF("Send packet\n");
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// 切换到接收模式
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LSD_RF_FreqSet(Lora_Param.ch);
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LSD_RF_RXmode(RF_PAYLOAD_LEN);
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}
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else if(UA0_Rx_Timeout)
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{
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LSD_RF_FreqSet(sendCh);
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LSD_RF_SendPacket(UA0_RxBuf + UA0_RxBuf_offset, UA0_RxBuf_Length - UA0_RxBuf_offset);
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UA0_RxBuf_offset = UA0_RxBuf_Length;
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PRINTF("Send packet\n");
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// 切换到接收模式
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LSD_RF_FreqSet(Lora_Param.ch);
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LSD_RF_RXmode(RF_PAYLOAD_LEN);
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}
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}
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}
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if(UA0_Rx_Timeout && UA0_RxBuf_offset == UA0_RxBuf_Length)
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P2OUT |= BIT3; // Output high
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}
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}
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// Port 1 interrupt service routine
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#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
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#pragma vector=PORT1_VECTOR
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__interrupt void Port_1(void)
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#elif defined(__GNUC__)
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void __attribute__ ((interrupt(PORT1_VECTOR))) Port_1 (void)
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#else
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#error Compiler not supported!
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#endif
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{
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uint8_t offset = 0;
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uint8_t len[1] = {0};
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uint8_t buf[RF_PAYLOAD_LEN];
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if(DIO0_IFG&DIO0_BIT) //数据传输中断处理
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{
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// 清中断
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DIO0_IFG &= ~DIO0_BIT;
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// 读取RF数据
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LSD_RF_RxVariPacket(buf, len); //接收可变数据包，如果速率为大速率，只能用接收固定数据包长度
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if(len[0] == 0)
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return;
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TA1CTL = MC__STOP | TACLR; // 停止定时器，复位计数器
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TA1CTL = TASSEL__ACLK | MC__UP; // 重新开始计时
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offset = 0;
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if(RF_Rx_Timeout) // 新的一组数据到来
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{
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RF_Rx_Timeout = 0;
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// 复位缓冲区
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RF_RxBuf_Length = 0;
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RF_RxBuf_offset = 0;
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if(Lora_Param.unicast)
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{
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// 定点传输，地址和信道校验失败
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if(len[0] <= 3 || buf[2] != Lora_Param.ch || ((buf[0] << 8) | buf[1]) != Lora_Param.addr)
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return;
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// 前3个字符丢掉
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offset = 3;
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len[0] -= offset;
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}
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}
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PRINTF("Recv packet\n");
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// 透传模式
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if((P2IN & (BIT5 | BIT6)) == 0)
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{
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if(RF_RxBuf_Length + len[0] <= TRAN_BUF_SIZE)
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{
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memmove(RF_RxBuf + RF_RxBuf_Length, buf + offset, len[0]);
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// 中断方式向串口转发
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RF_RxBuf_Length += len[0];
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UCA0IE |= UCTXIE;
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}
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}
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}
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}
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// Timer0 A0 interrupt service routine
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#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
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#pragma vector = TIMER0_A0_VECTOR
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__interrupt void Timer0_A0_ISR(void)
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#elif defined(__GNUC__)
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void __attribute__ ((interrupt(TIMER0_A0_VECTOR))) Timer0_A0_ISR (void)
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#else
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#error Compiler not supported!
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#endif
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{
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// 停止定时器，复位计数器
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TA0CTL = MC__STOP | TACLR;
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// 串口接收超时
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UA0_Rx_Timeout = 1;
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}
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// Timer1 A0 interrupt service routine
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#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
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#pragma vector = TIMER1_A0_VECTOR
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__interrupt void Timer1_A0_ISR(void)
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#elif defined(__GNUC__)
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void __attribute__ ((interrupt(TIMER1_A0_VECTOR))) Timer1_A0_ISR (void)
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#else
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#error Compiler not supported!
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#endif
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{
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// 停止定时器，复位计数器
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TA1CTL = MC__STOP | TACLR;
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// RF接收超时
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RF_Rx_Timeout = 1;
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}
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// UAR0 interrupt service routine
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#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
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#pragma vector=USCI_A0_VECTOR
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__interrupt void USCI_A0_ISR(void)
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#elif defined(__GNUC__)
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void __attribute__ ((interrupt(USCI_A0_VECTOR))) USCI_A0_ISR (void)
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#else
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#error Compiler not supported!
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#endif
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{
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// 接收中断
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if((UCA0IE & UCRXIE) && (UCA0IFG & UCRXIFG))
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{
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uint8_t c = UCA0RXBUF;
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TA0CTL = MC__STOP | TACLR; // 停止定时器，复位计数器
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TA0CTL = TASSEL__ACLK | MC__UP; // 重新开始计时
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|
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if(UA0_Rx_Timeout) // 新的一组数据到来
|
||
{
|
||
UA0_Rx_Timeout = 0;
|
||
// 复位缓冲区
|
||
UA0_RxBuf_Length = 0;
|
||
UA0_RxBuf_offset = 0;
|
||
}
|
||
|
||
if(UA0_RxBuf_Length < TRAN_BUF_SIZE)
|
||
{
|
||
#if 1
|
||
// 配置模式
|
||
if((P2IN & (BIT5 | BIT6)) == (BIT5 | BIT6))
|
||
{
|
||
// 第1个字符必须为0xC2
|
||
if(UA0_RxBuf_Length > 0 || c == 0xC2)
|
||
UA0_RxBuf[UA0_RxBuf_Length++] = c;
|
||
}
|
||
// 透传模式
|
||
else if((P2IN & (BIT5 | BIT6)) == 0)
|
||
#endif
|
||
{
|
||
// 主函数透传
|
||
UA0_RxBuf[UA0_RxBuf_Length++] = c;
|
||
}
|
||
|
||
P2OUT &= ~BIT3; // Output low
|
||
}
|
||
}
|
||
|
||
// 发送中断
|
||
if((UCA0IE & UCTXIE) && (UCA0IFG & UCTXIFG))
|
||
{
|
||
UCA0TXBUF = RF_RxBuf[RF_RxBuf_offset++]; // 发送字符
|
||
if(RF_RxBuf_offset >= RF_RxBuf_Length) // 全部发送完
|
||
{
|
||
// 禁止中断
|
||
UCA0IE &= ~UCTXIE;
|
||
}
|
||
}
|
||
}
|