wip: config.

1 files changed, 10 insertions, 2 deletions

diff --git a/main.c b/main.c
index 0d4dd8d..a23bbfa 100644
--- a/main.c
+++ b/main.c
@@ -38,7 +38,7 @@ static inline uint8_t read_reg(uint8_t reg)
 	return SPDR;
 }
 
-static inline void write_reg(uint8_t reg, uint8_t val)
+static inline void spi_write(uint8_t reg, uint8_t val)
 {
 	SPI_PORT &= ~(1 << SPI_SS);
 	SPDR = (reg & 0x1F) | 0x20;
@@ -50,6 +50,14 @@ static inline void write_reg(uint8_t reg, uint8_t val)
 	SPI_PORT |= (1 << SPI_SS);
 }
 
+static inline void write_reg(uint8_t reg, uint8_t val)
+{
+	uint8_t i;
+
+	for (i = 0; read_reg(reg) != val && i < 10; i++)
+		spi_write(reg, val);
+}
+
 static inline void print_config(void)
 {
 	char s[22];
@@ -82,7 +90,7 @@ void radio_init(void)
 	write_reg(0x01, 0b00111111);  /* enable auto ack on all pipes */
 	write_reg(0x02, 0b00000001);  /* enable rx address on pipe 0 */
 	write_reg(0x03, 0b00000001);  /* set address width to 3 bytes */
-	write_reg(0x04, 0b00000000);  /* disable auto retransmission */
+	write_reg(0x04, 0b00101111);  /* 750uS retransmission delay, 15 tries */
 	write_reg(0x05, 0b01110011);  /* use 2.515GHz channel */
 	write_reg(0x06, 0b00000110);  /* set data rate to 1Mbps */
 }