diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 61 |
1 files changed, 50 insertions, 11 deletions
@@ -12,11 +12,16 @@ #define SPI_DDR DDRB #define SPI_PORT PORTB +#define NRF_IRQ PD7 #define NRF_CE PB1 #define NRF_CE_DDR DDRB #define NRF_CE_PORT PORTB -#define NRF_IRQ PD7 +#define NRF_NOP 0xFF +#define NRF_R_REGISTER 0x1F +#define NRF_W_REGISTER 0x20 + +#define LEN(a) (sizeof(a) / sizeof(a[0])) const char *bittab[16] = { [ 0] = "0000", [ 1] = "0001", [ 2] = "0010", [ 3] = "0011", @@ -28,10 +33,10 @@ const char *bittab[16] = { static inline uint8_t read_reg(uint8_t reg) { SPI_PORT &= ~(1 << SPI_SS); - SPDR = reg & 0x1F; + SPDR = reg & NRF_R_REGISTER; while (!(SPSR & (1 << SPIF))) ; - SPDR = 0xFF; + SPDR = NRF_NOP; while (!(SPSR & (1 << SPIF))) ; SPI_PORT |= (1 << SPI_SS); @@ -41,7 +46,7 @@ static inline uint8_t read_reg(uint8_t reg) static inline void write_reg(uint8_t reg, uint8_t val) { SPI_PORT &= ~(1 << SPI_SS); - SPDR = (reg & 0x1F) | 0x20; + SPDR = (reg & 0x1F) | NRF_W_REGISTER; while (!(SPSR & (1 << SPIF))) ; SPDR = val; @@ -50,28 +55,60 @@ static inline void write_reg(uint8_t reg, uint8_t val) SPI_PORT |= (1 << SPI_SS); } +static inline void read_reg_bulk(uint8_t reg, uint8_t *data, uint8_t n) +{ + uint8_t i; + + SPI_PORT &= ~(1 << SPI_SS); + SPDR = reg & NRF_R_REGISTER; + while (!(SPSR & (1 << SPIF))) + ; + for (i = 0; i < n; i++) { + SPDR = NRF_NOP; + while (!(SPSR & (1 << SPIF))) + ; + data[i] = SPDR; + } + SPI_PORT |= (1 << SPI_SS); +} + +static inline void write_reg_bulk(uint8_t reg, uint8_t *data, uint8_t n) +{ + uint8_t i; + + SPI_PORT &= ~(1 << SPI_SS); + SPDR = (reg & 0x1F) | NRF_W_REGISTER; + while (!(SPSR & (1 << SPIF))) + ; + for (i = 0; i < n; i++) { + SPDR = data[i]; + while (!(SPSR & (1 << SPIF))) + ; + } + SPI_PORT |= (1 << SPI_SS); +} + static inline void print_config(void) { char s[22]; uint8_t i, rv; - uint8_t regs[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 }; - uint8_t reglen = sizeof(regs) / sizeof(regs[0]); uart_write_line("NRF24L01 configuration:"); - for (i = 0; i < reglen; i++) { + for (i = 0; i < LEN(regs); i++) { rv = read_reg(i); - snprintf(s, (sizeof(s) / sizeof(s[0])), - "\t0x%02X: 0x%02X %s%s", regs[i], rv, - bittab[rv >> 4], bittab[rv & 0x0F]); + snprintf(s, LEN(s), "\t0x%02X: 0x%02X %s%s", + regs[i], rv, bittab[rv >> 4], bittab[rv & 0x0F]); uart_write_line(s); } + + //snprintf(s, (sizeof())) } -void radio_init(void) +void radio_init() { SPI_DDR |= (1 << SPI_SS) | (1 << SPI_SCK) | (1 << SPI_MOSI); SPI_PORT |= (1 << SPI_SS); @@ -90,6 +127,8 @@ void radio_init(void) write_reg(0x05, 0b01110011); /* use 2.515GHz channel */ write_reg(0x06, 0b00001110); /* set data rate to 1Mbps */ write_reg(0x07, 0b01110000); /* clear rx, tx, max_rt interrupts */ + + //write_reg_bulk(0x0A, rxaddr, LEN(rxaddr)); } int main(void) |