From d162d1cfd2421509a8d6933cb93dd80ffeda9cf8 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Tue, 3 Dec 2024 18:00:14 +0800
Subject: Move the rfm code to separate file.

---
 rf_test/send.c | 137 ++-------------------------------------------------------
 1 file changed, 3 insertions(+), 134 deletions(-)

(limited to 'rf_test/send.c')

diff --git a/rf_test/send.c b/rf_test/send.c
index 71e764b..5dea8f3 100644
--- a/rf_test/send.c
+++ b/rf_test/send.c
@@ -5,135 +5,16 @@
 #include <avr/interrupt.h>
 #include <util/delay.h>
 
+#include "radio.h"
 #include "serial.h"
 
-#define SPI_SS         PB2
-#define SPI_SCK        PB5
-#define SPI_MISO       PB4
-#define SPI_MOSI       PB3
-#define SPI_DDR        DDRB
-#define SPI_PORT       PORTB
-
-#define RX_PIN         PB0
-#define RX_DDR         DDRB
-#define RX_PORT        PORTB
-#define RX_PCIE        PCIE0
-#define RX_PCINT       PCINT0
-#define RX_PCMSK       PCMSK0
-#define RX_PCINTVEC    PCINT0_vect
-
-#define PAYLOAD_LEN    32
-
-static inline uint8_t read_reg(uint8_t reg)
-{
-	SPI_PORT &= ~(1 << SPI_SS);
-	SPDR = reg & 0x7F;
-	while (!(SPSR & (1 << SPIF)))
-		;
-	SPDR = 0;
-	while (!(SPSR & (1 << SPIF)))
-		;
-	SPI_PORT |= (1 << SPI_SS);
-
-	return SPDR;
-}
-
-static inline void write_reg(uint8_t reg, uint8_t val)
-{
-	SPI_PORT &= ~(1 << SPI_SS);
-	SPDR = reg | 0x80;
-	while (!(SPSR & (1 << SPIF)))
-		;
-	SPDR = val;
-	while (!(SPSR & (1 << SPIF)))
-		;
-	SPI_PORT |= (1 << SPI_SS);
-}
-
-static inline void radio_send(const char *data, uint8_t n)
-{
-	uint8_t i;
-
-	// STDBY + ListenAbort mode
-	write_reg(0x01, 0x04);
-	while ((read_reg(0x27) >> 7) != 1)
-		;
-
-	SPI_PORT &= ~(1 << SPI_SS);
-	SPDR = 0x00 | 0x80;
-	while (!(SPSR & (1 << SPIF)))
-		;
-	for (i = 0; i < n; i++) {
-		SPDR = data[i];
-		while (!(SPSR & (1 << SPIF)))
-			;
-	}
-	SPI_PORT |= (1 << SPI_SS);
-
-	write_reg(0x01, 0x0C);
-	while (!read_reg(0x28))
-		;
-
-	write_reg(0x01, 0x04);
-	while ((read_reg(0x27) >> 7) != 1)
-		;
-
-	// enable ListenOn in STDBY mode
-	write_reg(0x01, (read_reg(0x01) | 0x40));
-}
-
-static inline uint8_t radio_recv(char *buf, uint8_t n)
-{
-	uint8_t i;
-
-	i = 0;
-
-	if ((read_reg(0x28) & 0x04))
-	{
-		write_reg(0x01, 0x04);
-		while ((read_reg(0x27) >> 7) != 1)
-			;
-
-		SPI_PORT &= ~(1 << SPI_SS);
-		SPDR = 0x00 | 0x7F;
-		while (!(SPSR & (1 << SPIF)))
-			;
-		while (i < n) {
-			SPDR = 0;		
-			while (!(SPSR & (1 << SPIF)))
-				;
-			buf[i++] = SPDR;
-		}	
-
-		SPI_PORT |= (1 << SPI_SS);
-	}
-	return i;
-}
-
-struct radio_cfg {
-	uint8_t payload_len;
-};
-
-static inline void radio_init(struct radio_cfg *cfg)
-{
-	SPI_DDR |= (1 << SPI_SS) | (1 << SPI_SCK) | (1 << SPI_MOSI);
-	SPI_PORT |= (1 << SPI_SS);
-	SPCR |= (1 << SPE) | (1 << MSTR);
-
-	if (cfg->payload_len > 0)
-		write_reg(0x38, cfg->payload_len);
-
-	RX_DDR &= ~(1 << RX_PIN);
-	PCICR |= (1 << RX_PCIE);
-	RX_PCMSK |= (1 << RX_PCINT);
-}
+#define PAYLOAD_LEN    13
 
 int main(void)
 {
 	struct radio_cfg cfg;
 
-	const char *s = "hello";
-
+	const char *s = "hello, world!";
 	cfg.payload_len = PAYLOAD_LEN;
 
 	serial_init();
@@ -150,15 +31,3 @@ int main(void)
 	return 0;
 }
 
-ISR(RX_PCINTVEC)
-{
-	uint8_t i, n;
-	char buf[PAYLOAD_LEN];
-	
-	n = radio_recv(buf, PAYLOAD_LEN);
-	
-	for (i = 0; i < n; i++)
-		serial_write(buf[i]);
-	serial_write('\r');
-	serial_write('\n');
-}
-- 
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