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| author | Sadeep Madurange <sadeep@asciimx.com> | 2024-11-23 15:14:01 +0800 |
|---|---|---|
| committer | Sadeep Madurange <sadeep@asciimx.com> | 2024-11-23 15:14:01 +0800 |
| commit | 96631bbf2575ad3fa28d3ecb7fcd970accd07615 (patch) | |
| tree | 8e3cb7e1221fbc0b43238764f420f90799ce4a17 /rf_test | |
| parent | 6b31b3f77b05286ca56590dde14717541f4cb5ba (diff) | |
| download | smart-home-96631bbf2575ad3fa28d3ecb7fcd970accd07615.tar.gz | |
Basic SPI functions for atmega328p.
Diffstat (limited to 'rf_test')
| -rw-r--r-- | rf_test/Recv.Makefile | 1 | ||||
| -rw-r--r-- | rf_test/Send.Makefile | 1 | ||||
| -rw-r--r-- | rf_test/send.c | 45 |
3 files changed, 17 insertions, 30 deletions
diff --git a/rf_test/Recv.Makefile b/rf_test/Recv.Makefile index cd5b4ff..535b2c0 100644 --- a/rf_test/Recv.Makefile +++ b/rf_test/Recv.Makefile @@ -9,7 +9,6 @@ CFLAGS = -std=gnu99 CFLAGS += -Os CFLAGS += -Wall CFLAGS += -mmcu=$(MCU) -CFLAGS += -DBAUD=2400 CFLAGS += -DF_CPU=16000000UL CFLAGS += -ffunction-sections -fdata-sections diff --git a/rf_test/Send.Makefile b/rf_test/Send.Makefile index 397a9db..a9aaeb0 100644 --- a/rf_test/Send.Makefile +++ b/rf_test/Send.Makefile @@ -9,7 +9,6 @@ CFLAGS = -std=gnu99 CFLAGS += -Os CFLAGS += -Wall CFLAGS += -mmcu=$(MCU) -CFLAGS += -DBAUD=2400 CFLAGS += -DF_CPU=16000000UL CFLAGS += -ffunction-sections -fdata-sections diff --git a/rf_test/send.c b/rf_test/send.c index 3ea0719..370a6f4 100644 --- a/rf_test/send.c +++ b/rf_test/send.c @@ -2,7 +2,6 @@ #include <avr/interrupt.h> #include <util/delay.h> -#define LOCK_LED PB5 #define LOCK_BTN PD6 #define UNLOCK_BTN PD7 @@ -10,36 +9,29 @@ #define LOCK 0xB5 #define UNLOCK 0xAE -#define SIGPIN PD2 -#define SIGLEN 500 - -static inline void send(unsigned char c) +static inline void spi_init(void) { - int n; - - for (n = 7; n >= 0; n--) { - PORTD = ((c >> n) & 1) == 1 - ? PORTD | (1 << SIGPIN) - : PORTD & ~(1 << SIGPIN); - - _delay_us(SIGLEN); - } + DDR_SPI = (1 << DD_MOSI) | (1 << DD_SCK); + SPCR = (1 << SPE) | (1 << MSTR) | (1 << SPR0); +} - PORTD &= ~(1 << SIGPIN); +static inline void spi_send(unsigned char data) +{ + SPRD = data; + while (!(SPSR & (1 << SPIF))) + ; } static inline void lock(void) { - send(SYN); - send(LOCK); - PORTB |= (1 << LOCK_LED); + spi_send(SYN); + spi_send(LOCK); } static inline void unlock(void) { - send(SYN); - send(UNLOCK); - PORTB &= ~(1 << LOCK_LED); + spi_send(SYN); + spi_send(UNLOCK); } static inline int is_btn_pressed(unsigned char btn) @@ -60,19 +52,16 @@ static inline void pcint2_init(void) int main(void) { - DDRB |= (1 << LOCK_LED); - DDRD &= ~((1 << LOCK_BTN) | (1 << UNLOCK_BTN)); PORTD |= (1 << LOCK_BTN) | (1 << UNLOCK_BTN); - DDRD |= (1 << SIGPIN); - PORTD &= ~(1 << SIGPIN); - + spi_init(); pcint2_init(); + sei(); - for (;;) { - } + for (;;) + ; return 0; } |