![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
master to control sensor node
Dependencies: mbed
gateway.cpp
- Committer:
- mfrede
- Date:
- 2015-11-17
- Revision:
- 6:9daa56b8a027
- Parent:
- 5:85fea4ceaa1f
File content as of revision 6:9daa56b8a027:
#include "mbed.h" #include "MRF24J40.h" #include <string> #include "packet.h" #define NODE 1 //unsigned short TYPE = 4; // RF tranceiver to link with handheld. MRF24J40 mrf(p11, p12, p13, p14, p21); DigitalOut myled(LED1); // Serial port for showing RX data. Serial pc(USBTX, USBRX); // Used for sending and receiving char txBuffer[128]; char rxBuffer[128]; int rxLen; packet* sxBuffer; packet* gxBuffer; //***************** Do not change these methods (please) *****************// /** * Receive data from the MRF24J40. * * @param data A pointer to a char array to hold the data * @param maxLength The max amount of data to read. */ int rf_receive(char *data, uint8_t maxLength, uint8_t *rssi) { uint8_t len = mrf.Receive((uint8_t *)data, maxLength,rssi); uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; if(len > 10) { //Remove the header and footer of the message for(uint8_t i = 0; i < len-2; i++) { if(i<8) { //Make sure our header is valid first if(data[i] != header[i]) return 0; } else { data[i-8] = data[i]; } } //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10); } return ((int)len)-10; } /** * Send data to another MRF24J40. * * @param data The string to send * @param maxLength The length of the data to send. * If you are sending a null-terminated string you can pass strlen(data)+1 */ void rf_send(packet *data, uint8_t len) { uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00}; uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) ); for(uint8_t i = 0; i < len+8; i++) { //prepend the 8-byte header send_buf[i] = (i<8) ? header[i] : ((uint8_t *) data)[i-8]; } mrf.Send((uint8_t *) data, (len*4)+12); //free(send_buf); } int main() { mrf.SetChannel(15); int nodes = 6; // char buffer[128]; packet buffer(NODE,2,HELLO_TYPE,4.0,5.0); rf_send(&buffer, 2); pc.printf("sent\r\n"); /* while(1) { pc.printf("Select operation: \r\n"); pc.printf("1) get node list\r\n"); pc.printf("2) Update data rates\r\n"); pc.gets(buffer,1); switch (buffer[0]) { case '1': for(int i=0;i<nodes;i++) { pc.printf("Node %d Neighbors:\r\n"); for (int j=0;j<neighbors[i][0];j++) { pc.printf("Node %d: %d cycles\r\n",neighbors[i][j],cycles[i][j]); } } break; case '2': pc.printf("How many seconds between updates? "); pc.gets(buffer,2); int secs = atoi(buffer); //build data packet //broadcast type //send data packet break; default: pc.printf("unknown command\r\n"); break; } */ //} }