Part Number: MSP430G2553
Tool/software: Code Composer Studio
Hi!
I'm using msp430g2553 with an nrf24l01 module and i'm trying to comunicate with another msp430g2553 and nrf24l01.
I used the sample code ike-uscia-tx/rx but when i start the program on CCS i have a problem in the code:
| #include <msp430.h> | |
| #include "msprf24.h" | |
| #include "nrf_userconfig.h" | |
| #include "stdint.h" | |
| volatile unsigned int user; | |
| int main() | |
| { | |
| uint8_t addr[5]; | |
| uint8_t buf[32]; | |
| WDTCTL = WDTHOLD | WDTPW; | |
| DCOCTL = CALDCO_16MHZ; | |
| BCSCTL1 = CALBC1_16MHZ; | |
| BCSCTL2 = DIVS_1; // SMCLK = DCOCLK/2 | |
| // SPI (USCI) uses SMCLK, prefer SMCLK < 10MHz (SPI speed limit for nRF24 = 10MHz) | |
| // Red LED will be our output | |
| P1DIR |= BIT0+BIT6; | |
| P1OUT &= ~(BIT0+BIT6); | |
| user = 0xFE; | |
| /* Initial values for nRF24L01+ library config variables */ | |
| rf_crc = RF24_EN_CRC | RF24_CRCO; // CRC enabled, 16-bit | |
| rf_addr_width = 5; | |
| rf_speed_power = RF24_SPEED_1MBPS | RF24_POWER_0DBM; | |
| rf_channel = 120; | |
| msprf24_init(); | |
| msprf24_set_pipe_packetsize(0, 32); | |
| msprf24_open_pipe(0, 1); // Open pipe#0 with Enhanced ShockBurst | |
| // Set our RX address | |
| addr[0] = 0xDE; addr[1] = 0xAD; addr[2] = 0xBE; addr[3] = 0xEF; addr[4] = 0x00; | |
| w_rx_addr(0, addr); | |
| // Receive mode | |
| if (!(RF24_QUEUE_RXEMPTY & msprf24_queue_state())) { | |
| flush_rx(); | |
| } | |
| msprf24_activate_rx(); | |
| LPM4; | |
| while (1) { | |
| if (rf_irq & RF24_IRQ_FLAGGED) { | |
| rf_irq &= ~RF24_IRQ_FLAGGED; | |
| msprf24_get_irq_reason(); | |
| } | |
| if (rf_irq & RF24_IRQ_RX || msprf24_rx_pending()) { | |
| r_rx_payload(32, buf); | |
| msprf24_irq_clear(RF24_IRQ_RX); | |
| user = buf[0]; | |
| if (buf[0] == '0') | |
| P1OUT &= ~BIT0; | |
| if (buf[0] == '1') | |
| P1OUT |= BIT0; | |
| if (buf[1] == '0') | |
| P1OUT &= ~BIT6; | |
| if (buf[1] == '1') | |
| P1OUT |= BIT6; | |
| } else { | |
| user = 0xFF; | |
| } | |
| LPM4; | |
| } | |
| return 0; | |
| } |
in this line:
| if (rf_irq & RF24_IRQ_FLAGGED) |
when i run my program it doesn't go through the if command and doesn't start to transmit or receive.
i selected USCI A and the links are the following:
| nrf24l01 Vcc - LP pin 1 VCC. | |
| nrf24l01 GND - LP pin 20 GND. | |
| nrf24l01 MI - LP pin 3 P1.1 USCI_A0 SPI mode: slave data out/master in. | |
| nrf24l01 MO - LP pin 4 P1.2 USCI_A0 SPI mode: slave data in/master out. | |
| nrf24l01 SCK - LP pin 6 P1.4 USCI_A0 clock input/output. | |
| nrf24l01 CE - LP pin 8 P2.0 General-purpose digital I/O pin. | |
| nrf24l01 CSN - LP pin 9 P2.1 General-purpose digital I/O pin. | |
|
nrf24l01 IRQ - LP pin 10 P2.2 General-purpose digital I/O pin. |
How can i do? Thanks for the attention.
Carlo
