From 0c53882910cd82492b6a9c4ab0aa1523c3c031e6 Mon Sep 17 00:00:00 2001 From: Sadeep Madurange Date: Sun, 9 Mar 2025 14:59:04 +0800 Subject: SPI;2uworking. --- main.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) (limited to 'main.c') diff --git a/main.c b/main.c index 082d9d5..604da00 100644 --- a/main.c +++ b/main.c @@ -1,3 +1,4 @@ +#include #include #include #include @@ -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; -- cgit v1.2.3