SPI;2uworking.

1 files changed, 14 insertions, 6 deletions

diff --git a/main.c b/main.c
index 082d9d5..604da00 100644
--- a/main.c
+++ b/main.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <stdlib.h>
 #include <avr/io.h>
 #include <util/delay.h>
@@ -11,18 +12,18 @@
 #define SPI_DDR    DDRB
 #define SPI_PORT   PORTB
 
+#define NRF_CE     PB1  
+#define NRF_IRQ    PD7  
+
 static inline uint8_t read_reg(uint8_t reg)
 {
 	SPI_PORT &= ~(1 << SPI_SS);
-
 	SPDR = reg & 0x1F;
 	while (!(SPSR & (1 << SPIF)))
 		;
-
 	SPDR = 0xFF;
 	while (!(SPSR & (1 << SPIF)))
 		;
-
 	SPI_PORT |= (1 << SPI_SS);
 	return SPDR;
 }
@@ -32,20 +33,27 @@ void radio_init(void)
 	SPI_DDR |= (1 << SPI_SS) | (1 << SPI_SCK) | (1 << SPI_MOSI);
 	SPI_PORT |= (1 << SPI_SS);
 	SPCR |= (1 << SPE) | (1 << MSTR);
+
+	// CE=0 for standby-i mode
+	DDRB |= (1 << NRF_CE);
+	PORTB &= ~(1 << NRF_CE);
+
+	_delay_ms(500);
 }
 
 int main(void)
 {
+	char s[5];
+
 	uart_init();
 	radio_init();
 
 	for (int i = 0; i < 10; i++) {
 		uint8_t val = read_reg(0x00);
+		sprintf(s, "%x", val);
 
 		uart_write("CONFIG: ");
-		uart_write_char(val);
-		uart_write_char('\r');
-		uart_write_char('\n');
+		uart_write_line(s);
 	}
 
 	return 0;