mbed_controller / Mbed 2 deprecated CC1101_Transceiver_STM32F4

This is modified program from original CC1101_Transceiver. CC1101 Test succeeded STM32-F407 platform. Feature are improved little bit.

Dependencies:   mbed

TI CC1101 chip is embedded along with STM32-F407 MCU. /media/uploads/hillkim7/cc1101-test.png

main.cpp@2:54c832c68208, 2015-03-31 (annotated)

Committer:
hillkim7
Date:
Tue Mar 31 08:48:00 2015 +0000
Revision:
2:54c832c68208
Parent:
1:e96096a7b90b 
Fix misspelled word.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hillkim7 1:e96096a7b90b 1 /**
hillkim7 1:e96096a7b90b 2 * This program prints input text to serial port of each other side.
hillkim7 1:e96096a7b90b 3 * Test result: TX, RX work well with 433MHz on STM32-F407 platform.
hillkim7 1:e96096a7b90b 4 * Two features are improved from the original source code.
hillkim7 1:e96096a7b90b 5 * - Synchronous implementation of CC1101::SendPacket()
hillkim7 2:54c832c68208 6 * For subsequent packet transmission, now this function returns after packet transmission.
hillkim7 1:e96096a7b90b 7 * - FIFO checking routine changed.
hillkim7 2:54c832c68208 8 * Original code uses timer to check FIFO, it may cause resource corruption by timer interrupt.
hillkim7 1:e96096a7b90b 9 */
tmav123 0:9df942ea84f4 10 #include "mbed.h"
tmav123 0:9df942ea84f4 11 #include "CC1101.h"
tmav123 0:9df942ea84f4 12 #include "RingBuffer.h"
hillkim7 1:e96096a7b90b 13
hillkim7 1:e96096a7b90b 14 #if 0
hillkim7 1:e96096a7b90b 15 #define PRINTF pc.printf
hillkim7 1:e96096a7b90b 16 #else
hillkim7 1:e96096a7b90b 17 #define PRINTF(...)
hillkim7 1:e96096a7b90b 18 #endif
hillkim7 1:e96096a7b90b 19
hillkim7 1:e96096a7b90b 20 #define FIFO_CHECK_INTERVAL_US 500000
hillkim7 1:e96096a7b90b 21
tmav123 0:9df942ea84f4 22 ///////////////////////////////////////////////////
hillkim7 1:e96096a7b90b 23 const PinName mosi = PB_5;
hillkim7 1:e96096a7b90b 24 const PinName miso = PB_4;
hillkim7 1:e96096a7b90b 25 const PinName clk = PB_3;
hillkim7 1:e96096a7b90b 26 const PinName csn = PA_15;
hillkim7 1:e96096a7b90b 27 // RDmiso --> pin to detect MISO low.
hillkim7 1:e96096a7b90b 28 const PinName RDmiso = PD_7;
tmav123 0:9df942ea84f4 29
hillkim7 1:e96096a7b90b 30 // pin connected to GDO0 pin of CC1101 for checking that received a new packet
hillkim7 1:e96096a7b90b 31 // It related with CC1101 IOCFG0 register.
hillkim7 1:e96096a7b90b 32 const PinName gdo0 = PE_0;
hillkim7 1:e96096a7b90b 33
hillkim7 1:e96096a7b90b 34 // pin for checking that sent a packet
hillkim7 2:54c832c68208 35 // It related with CC1101 IOCFG02register.
hillkim7 2:54c832c68208 36 const PinName gdo2 = PE_1;
hillkim7 2:54c832c68208 37
hillkim7 2:54c832c68208 38 CC1101 cc1101(mosi, miso, clk, csn, RDmiso, gdo0, gdo2);
hillkim7 1:e96096a7b90b 39
hillkim7 2:54c832c68208 40 #if 1
hillkim7 2:54c832c68208 41 Serial pc(PD_8, PD_9); // tx, rx
hillkim7 2:54c832c68208 42 DigitalOut led1(PD_12); // FIFO led
hillkim7 2:54c832c68208 43 DigitalOut led2(PD_13); // RX led
hillkim7 2:54c832c68208 44 DigitalOut led3(PD_14); // TX led
hillkim7 2:54c832c68208 45 #else
hillkim7 1:e96096a7b90b 46 Serial pc(USBTX, USBRX);
hillkim7 1:e96096a7b90b 47 DigitalOut led1(LED1); // FIFO led
tmav123 0:9df942ea84f4 48 DigitalOut led2(LED2); // RX led
tmav123 0:9df942ea84f4 49 DigitalOut led3(LED3); // TX led
hillkim7 2:54c832c68208 50 #endif
tmav123 0:9df942ea84f4 51 RingBuffer pcRX(512); // ring buffer for the pc RX data
tmav123 0:9df942ea84f4 52 RingBuffer pcTX(512); // ring buffer for the pc TX data
tmav123 0:9df942ea84f4 53 Timeout pcRXtimeout;
tmav123 0:9df942ea84f4 54 Timeout led2timeout;
tmav123 0:9df942ea84f4 55 Timeout led3timeout;
hillkim7 1:e96096a7b90b 56 unsigned char buffer[64];
hillkim7 1:e96096a7b90b 57
hillkim7 1:e96096a7b90b 58 ///////////////////////////////////////////////////
hillkim7 1:e96096a7b90b 59 static uint32_t compute_elapse_us(uint32_t prev_tick, uint32_t cur_tick)
hillkim7 1:e96096a7b90b 60 {
hillkim7 1:e96096a7b90b 61 if (prev_tick <= cur_tick)
hillkim7 1:e96096a7b90b 62 return cur_tick - prev_tick;
hillkim7 1:e96096a7b90b 63
hillkim7 1:e96096a7b90b 64 // tick wrap around happens, it assumes tick start from 0.
hillkim7 1:e96096a7b90b 65 return cur_tick;
hillkim7 1:e96096a7b90b 66 }
tmav123 0:9df942ea84f4 67 ///////////////////////////////////////////////////
tmav123 0:9df942ea84f4 68 void led2timeout_func()
tmav123 0:9df942ea84f4 69 {
tmav123 0:9df942ea84f4 70 led2 = 0;
tmav123 0:9df942ea84f4 71 led2timeout.detach();
tmav123 0:9df942ea84f4 72 }
tmav123 0:9df942ea84f4 73 ///////////////////////////////////////////////////
tmav123 0:9df942ea84f4 74 void led3timeout_func()
tmav123 0:9df942ea84f4 75 {
tmav123 0:9df942ea84f4 76 led3 = 0;
tmav123 0:9df942ea84f4 77 led3timeout.detach();
tmav123 0:9df942ea84f4 78 }
tmav123 0:9df942ea84f4 79 ///////////////////////////////////////////////////
tmav123 0:9df942ea84f4 80 void pcRXtimeout_func() // function for transmiting the RF packets - empty the pcRX ring buffer
tmav123 0:9df942ea84f4 81 {
tmav123 0:9df942ea84f4 82 unsigned char txlength;
hillkim7 1:e96096a7b90b 83
tmav123 0:9df942ea84f4 84 txlength = 0;
hillkim7 1:e96096a7b90b 85 while(pcRX.use() > 0) {
hillkim7 1:e96096a7b90b 86 led2 = 1;
hillkim7 1:e96096a7b90b 87 buffer[txlength] = pcRX.getc();
hillkim7 1:e96096a7b90b 88 txlength++;
hillkim7 1:e96096a7b90b 89 led2timeout.attach(&led2timeout_func, 0.050); // for switch off the led
tmav123 0:9df942ea84f4 90 }
hillkim7 1:e96096a7b90b 91 if (txlength) {
hillkim7 1:e96096a7b90b 92 cc1101.SendPacket(buffer, txlength); // tx packet
hillkim7 1:e96096a7b90b 93 }
hillkim7 1:e96096a7b90b 94
tmav123 0:9df942ea84f4 95 pcRXtimeout.detach();
tmav123 0:9df942ea84f4 96 }
tmav123 0:9df942ea84f4 97 ///////////////////////////////////////////////////
hillkim7 1:e96096a7b90b 98 void check_FIFO() // check the status of the CC1101 to see FIFO error
hillkim7 1:e96096a7b90b 99 {
tmav123 0:9df942ea84f4 100 unsigned char chip_status_rx, chip_status_tx;
hillkim7 1:e96096a7b90b 101
tmav123 0:9df942ea84f4 102 led1 = !led1;
hillkim7 1:e96096a7b90b 103 chip_status_rx = cc1101.ReadChipStatusRX(); // check the rx status
hillkim7 1:e96096a7b90b 104 if ((chip_status_rx & CHIP_STATE_MASK) == CHIP_STATE_RXFIFO_OVERFLOW) { // if rx overflow flush the rx fifo
hillkim7 1:e96096a7b90b 105 PRINTF("*RXFIFO_OVERFLOW->Flush\r\n");
hillkim7 1:e96096a7b90b 106 cc1101.FlushRX();
hillkim7 1:e96096a7b90b 107 }
hillkim7 1:e96096a7b90b 108 if ((chip_status_rx & CHIP_STATE_MASK) == CHIP_STATE_IDLE) { // if state is idle go to rx state again
hillkim7 1:e96096a7b90b 109 // Basically we don't need to set RXMode here because RXOFF_MODE and TXOFF_MODE of CC1101 are RX mode.
hillkim7 1:e96096a7b90b 110 // But we still need to check IDLE because it can be IDEL by flushing FIFO.
hillkim7 1:e96096a7b90b 111 PRINTF("*RX MODE\r\n");
hillkim7 1:e96096a7b90b 112 cc1101.RXMode();
hillkim7 1:e96096a7b90b 113 }
hillkim7 1:e96096a7b90b 114 chip_status_tx = cc1101.ReadChipStatusTX(); // check the tx status
hillkim7 1:e96096a7b90b 115 if ((chip_status_tx & CHIP_STATE_MASK) == CHIP_STATE_TXFIFO_UNDERFLOW) { // if tx underflow flush the tx fifo
hillkim7 1:e96096a7b90b 116 PRINTF("*XFIFO_UNDERFLOW->Flush\r\n");
hillkim7 1:e96096a7b90b 117 cc1101.FlushTX();
hillkim7 1:e96096a7b90b 118 }
hillkim7 1:e96096a7b90b 119 PRINTF("[%8u]Chip RX=%02x TX=%02x\r\n", us_ticker_read()/1000, chip_status_rx, chip_status_tx);
tmav123 0:9df942ea84f4 120 }
tmav123 0:9df942ea84f4 121 ///////////////////////////////////////////////////
hillkim7 1:e96096a7b90b 122 int main()
tmav123 0:9df942ea84f4 123 {
tmav123 0:9df942ea84f4 124 unsigned char rxlength, i;
hillkim7 1:e96096a7b90b 125 uint32_t saved_tick = 0, cur_tick;
hillkim7 1:e96096a7b90b 126
hillkim7 1:e96096a7b90b 127 pc.baud(115200);
hillkim7 1:e96096a7b90b 128 printf("build at " __TIME__ "\r\n");
tmav123 0:9df942ea84f4 129 pcRX.clear();
tmav123 0:9df942ea84f4 130 pcTX.clear();
tmav123 0:9df942ea84f4 131 cc1101.init();
hillkim7 1:e96096a7b90b 132 while(1) {
hillkim7 1:e96096a7b90b 133 cur_tick = us_ticker_read();
hillkim7 1:e96096a7b90b 134 if (compute_elapse_us(saved_tick, cur_tick) > FIFO_CHECK_INTERVAL_US) {
hillkim7 1:e96096a7b90b 135 check_FIFO();
hillkim7 1:e96096a7b90b 136 saved_tick = cur_tick;
hillkim7 1:e96096a7b90b 137 }
hillkim7 1:e96096a7b90b 138
hillkim7 1:e96096a7b90b 139 if(cc1101.GetGDO0()) { // rx finished and CRC OK read the new packet
tmav123 0:9df942ea84f4 140 rxlength = sizeof(buffer);
hillkim7 1:e96096a7b90b 141 if (cc1101.ReceivePacket(buffer, &rxlength) == 1) { // read the rx packet
tmav123 0:9df942ea84f4 142 led3 = 1;
tmav123 0:9df942ea84f4 143 for (i = 0; i < rxlength; i++)
hillkim7 1:e96096a7b90b 144 pcTX.putc(buffer[i]); // store the packet to the pcTX ring buffer
tmav123 0:9df942ea84f4 145 led3timeout.attach(&led3timeout_func, 0.050); // for switch off the led
tmav123 0:9df942ea84f4 146 }
tmav123 0:9df942ea84f4 147 }
tmav123 0:9df942ea84f4 148 if (pcTX.use() > 0) // check if we have data to transmit to pc
tmav123 0:9df942ea84f4 149 pc.putc(pcTX.getc()); // get the data from the ring buffer and transmit it to the pc
hillkim7 1:e96096a7b90b 150 if (pc.readable()) { // check if we received new data from the pc
tmav123 0:9df942ea84f4 151 pcRX.putc(pc.getc()); // put the data to the pcRX buffer and wait until 20ms passed till the last byte before tx the packet in RF
hillkim7 1:e96096a7b90b 152 if (pcRX.use() > 20) // if more than 20 bytes received then tx the packet in RF
hillkim7 1:e96096a7b90b 153 pcRXtimeout_func();
hillkim7 1:e96096a7b90b 154 else
hillkim7 1:e96096a7b90b 155 pcRXtimeout.attach(&pcRXtimeout_func, 0.020);
tmav123 0:9df942ea84f4 156 }
hillkim7 1:e96096a7b90b 157 }
tmav123 0:9df942ea84f4 158 }
tmav123 0:9df942ea84f4 159 ///////////////////////////////////////////////////
hillkim7 1:e96096a7b90b 160