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| /*
________ _______
VDD | \/ | VSS
RA5 | PIC16F1459 | RA0
RA4 | | RA1
RA3 | | Vusb3v3
LED Red RC5 | | RC0
LED Gr RC4 | | RC1
SDI CSN RC3 | | RC2
SDI CE RC6 | | RB4 SPI Serial Data in
SPI SDO RC7 | | RB5
SDI IRQ RB7 |_________________| RB6 SPI SCL (white)
*/
#include <xc.h>
#include <stdbool.h>
#define _XTAL_FREQ 16000000
#define byte unsigned char
#define laag 0
#define hoog 1
#define CE RC6 // Chip Enable output
#define IRQ RB7 // Interrupt input
#define CSN RC3 // Chip Select Not output
#define SDO RC7 // Serial Data Out output
#define SDI RB4 // Serial Data In input
#define CLK RB6 // Clock output
// Config Register: CONFIG1
// Oscillator Selection: FOSC_ECH,FOSC_ECH,FOSC_ECL,FOSC_INTOSC,FOSC_EXTRC,FOSC_HS,FOSC_XT,FOSC_LP
// Watchdog Timer Enable: WDTE_ON,WDTE_NSLEEP,WDTE_SWDTEN,WDTE_OFF
// WDT enabled
// Power-up Timer PWRTE_OFF,PWRTE_ON
// MCLR Pin Function Select MCLRE_ON,MCLRE_OFF
// Flash Program Memory Code Protection CP_OFF,CP_ON
// Brown-out Reset Enable BOREN_ON,BOREN_NSLEEP,BOREN_SBODEN,BOREN_OFF
// Clock Out Enable CLKOUTEN_OFF,CLKOUTEN_ON
//
// Internal/External Switchover IESO_ON,IESO_OFF
// Fail-Safe Clock Monitor Enable FCMEN_ON,FCMEN_OFF
// Config Register:CONFIG2
// Flash Memory Self-Write Protection WRT_OFF,WRT_BOOT,WRT_HALF,WRT_ALL
// PLL PLLEN_ENABLE,PLLEN_DISABLE
// Stack Overflow/Underflow Reset Enable STVREN_ON,STVREN_OFF
// Brown-out Reset Voltage Selection BORV_LO,BORV_HI
// Low-Voltage Programming Enable LVP_ON,LVP_OFF
#pragma config FOSC=INTOSC, WDTE=OFF, PWRTE=OFF, MCLRE=ON, CP=OFF, BOREN=OFF, CLKOUTEN=OFF, IESO=OFF, FCMEN=OFF, WRT=OFF, PLLEN=DISABLED, STVREN=OFF, BORV=HI, LVP=OFF,
int knop1, knop2, j;
bool ack;
unsigned char dataR;
unsigned char dummydata;
unsigned char data1, data2, data3, data4;
unsigned char spi_send(unsigned char dataS)
{
SSP1IF = 0; // clear interrupt flag
SSP1BUF = dataS; // send dataS(end)
while (!SSP1IF); // wait till SSP interrupt flag is set
dataR = SSP1BUF; // read SSPBUF to dataR(ead)
return dataR;
}
void nrf_config() // NRF initialisation code RX mode
{
CE = laag; // chip standby, does not monitor the airdata
__delay_ms(10); // delay
CSN = hoog; // must be high when idle
__delay_ms(100); // delay
CSN = laag; // indicate data transmitting to NRF
spi_send(0x20); // write register(=001) 0 0000
spi_send(0x09); // (0000 1010) CRC enabled, interrupts on IRQ enabled, PRX (=transceiver), power up
CSN = hoog; // end data transmitting
__delay_us(1); // delay
CSN = laag;
spi_send(0x21); // write register(=001) 0 0001
spi_send(0x00); // turn off auto ACK
CSN = hoog;
__delay_us(1);
/* // register 0x22 is used only in RX mode
CSN = laag;
spi_send(0x22); // write register(=001) 0 0010
spi_send(0x03); // receive trough data pipe 0 & 1
CSN = hoog;
__delay_us(1); */
CSN = laag;
spi_send(0x23); // write register(=001) 0 0003
spi_send(0x01); // address width 3 bytes
CSN = hoog;
__delay_us(1);
/* CSN = laag; // enable in TX mode
spi_send(0x24); // write register(=001) 0 0004
spi_send(0x03); // retry transmitting when failed after 250 uS, try 3 times
CSN = hoog;
__delay_us(1); */
CSN = laag;
spi_send(0x25); // write register(=001) 0 0005
spi_send(0x05); // operating frequency set to 0000 0101
CSN = hoog;
__delay_us(1);
CSN = laag;
spi_send(0x26); // write register(=001) 0 0006
spi_send(0x04); // 1MB/s data rate, -6 dBm output power
CSN = hoog;
__delay_us(1);
// register 0x27 is status register
// register 0x28 is transmitter observer
// register 0x29 is received power detector
// triggered by power levels above -64dBm in slected channel
// register 0x2A - 2F = data pipe addresses
// register 0x30 is transmit address
int i;
CSN = laag;
spi_send(0x2A); // write register (=001) 1 0000 = transmit address
for (i=0; i<5; i++) // write addressbyte E7 3x for complete TX_ADDR (= E7E7E7)
{
spi_send(0xE7);
}
CSN = hoog;
__delay_us(1);
CSN = laag;
spi_send(0x31); // write register (=001) 1 0001
spi_send(0x04); // 4 byte payload in data pipe 0
CSN = hoog;
__delay_us(1);
CSN = laag; // indicate data transmitting to NRF
spi_send(0x20); // write register(=001) 0 0000
spi_send(0x0B); // (0000 1010) CRC enabled, interrupts on IRQ enabled, PRX (=transceiver), power up
CSN = hoog; // end data transmitting
__delay_us(1); // delay
CE = hoog; // CE high means receiver is listening to the air data
}
// send to NRF unit, 4 byte payload
// after sending data to NRF, empty FIFO by transmitting this data
unsigned char nrf_send(unsigned char data1, unsigned char data2, unsigned char data3, unsigned char data4)
{
CSN = laag;
spi_send(0xA0); // command to write TX FIFO
spi_send(data1); // send data1 to TX FIFO
spi_send(data2); // send data2 to TX FIFO
spi_send(data3); // send data3 to TX FIFO
spi_send(data4); // send data4 to TX FIFO
CSN = hoog;
__delay_us(1);
CE = hoog; // make CE high to initiate data transmitting
__delay_us(100); // keep CE high for at least 10 uS to transmit data
CE = laag; // make CE low again to stop transmitting
__delay_us(1);
return 0;
}
// read from NRF unit, 4 byte payload
// empty RX FIFO after transmission
void nrf_read()
{
CSN = laag;
spi_send(0x61); // command to read RX FIFO
spi_send(0x01); // read data, send 0x01
data1 = dataR; // read SSP1BUF to data1
spi_send(0x01); // read data, send 0x01
data2 = dataR; // read SSP1BUF to data2
spi_send(0x01); // read data, send 0x01
data3 = dataR; // read SSP1BUF to data3
spi_send(0x01); // read data, send 0x01
data4 = dataR; // read SSP1BUF to data4
CSN = hoog;
__delay_us(1);
CSN = laag;
spi_send(0xE2); // flush RX FIFO data, data not needed anymore
CSN = hoog;
__delay_us(1);
CSN = laag;
spi_send(0x27); // call status register
spi_send(0x4E); // clear interrupt, RX FIFO empty
CSN = hoog;
__delay_us(1);
}
void main(void) // main program
{
ANSELA = 0x00;
ANSELB = 0x00;
ANSELC = 0x00;
TRISA = 0x00;
TRISB = 0b10010000;
TRISB7 = 1;
TRISB4 = 1;
TRISC = 0b00000000;
OSCCON = 0b00111100; //internal clock 16 MHz no PLL
PORTB = 0x00;
PORTC = 0x00;
// [SPI mastermode]
INTCON = 0xD1;
PIE1 = 0b00001000;
PIE2 = 0x00;
PIR1 = 0b00;
PIR2 = 0x00;
SSP1ADD = 0x27; // 100 kHz, SSPAD 39. instellen Fosc zo langzaam mogelijk !!!
SSP1STAT = 0b11000000; // input sampled at end of output time, sending at clock from active to idle
SSP1CON1 = 0b00111010; // SSP high clock, baudrate calculated with SSPADD
SSP1CON3 = 0b00010000; // SSP overwrite data when buffer is not read in slave mode, no use in mastermode
// [/SPI mastermode]
nrf_config();
//mastercode start
while (1)
{
if (IRQ == 0)
{
LATC4 = 1;
}
else if (IRQ == 1)
{
LATC5 = 1;
}
__delay_ms(300);
LATC4 = LATC5 = 0;
__delay_ms(300);
/* LATC5 = 1;
__delay_ms(500);
nrf_read();
if (data1 == 0x12)
{
LATC4 = 1;
}
else
{
LATC5 = 0;
__delay_ms(100);
LATC5 = 1;
}
__delay_ms(500);
LATC5 = LATC4 = 0;
__delay_ms(500); */
}
}
//master stop |
Microcontroller/u/524336/crop57ffe766deaff_cropped.png?f=community)
:strip_exif()/u/18996/GoT_avatar.gif?f=community){kind=avatar}
.
ik dacht een heel topic over micro-C (OS laag voor multitasking op microcontrollers).
/u/203831/ts2.PNG?f=community)
Ik ben zelf 100% functioneel µC-programmeur, dus ik heb eigenlijk alleen ervaring met embedded C (op gcc). Zooi zoals RTOS raak ik zelden aan.:strip_icc():strip_exif()/u/52612/pompoentje.jpg?f=community)
:strip_exif()/u/69356/dood_klok.gif?f=community)
:strip_icc():strip_exif()/u/145751/check-in-minion-small2.jpg?f=community)
:strip_exif()/u/58402/resicon.gif?f=community)
:strip_icc():strip_exif()/u/212876/7800_70.jpg?f=community)
/u/63969/img.png?f=community)
:strip_icc():strip_exif()/u/68763/wielGoT.jpg?f=community)
:strip_icc():strip_exif()/u/109773/ziltoid_fetid_70px.jpg?f=community)
/u/92491/crop55e2f2e07537a_cropped.png?f=community)
:strip_icc():strip_exif()/u/597663/tux12.jpg?f=community)
/u/56781/crop5c7971ac5118e.png?f=community)
Zal wel weer ergens overheen kijken. 
/u/250125/avat.png?f=community)
:strip_icc():strip_exif()/u/225583/crop5db1b1fd1ec4a_cropped.jpeg?f=community)
). De compiler kan dat echter ook niet zien; dus kan je programma niet werken zoals je wil./u/193355/F5%2520small.png?f=community)
:strip_exif()/u/33682/darkside.gif?f=community)
/u/14698/odie.png?f=community)