From 0c7bebea1bd05a95d2bb3e04ecb2e44792d6f174 Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@diac24.net>
Date: Wed, 20 Jun 2012 14:22:16 +0200
Subject: light: CAN RX

---
 can.c       | 24 ++++++++++++++++--------
 lightctrl.c | 26 ++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/can.c b/can.c
index 706fdb3..16b66a0 100644
--- a/can.c
+++ b/can.c
@@ -135,10 +135,15 @@ static void can_send(uint32_t daddr, uint8_t len, uint8_t *data)
 }
 
 #ifndef R0KET
+union {
+	uint8_t b[4];
+	uint32_t u;
+} can_rx_addr;
+uint8_t can_rx_dlc, can_rx_data[8];
+
 static void can_rxh(uint8_t buffer)
 {
-	uint8_t dlc, c, rtr;
-	uint32_t addr;
+	uint8_t c, byte;
 
 	if (buffer)
 		uart_puts("can: RX1IF\n");
@@ -146,17 +151,20 @@ static void can_rxh(uint8_t buffer)
 		uart_puts("can: RX0IF\n");
 	spi_ss(0);
 	spi_wrrd(0x90 + 0x04 * buffer);
-	addr = 0;
-#define rdaddr() c = spi_wrrd(0xff); uart_puthex(c); addr <<= 8; addr |= c
+	c = 0;
+#define rdaddr() byte = spi_wrrd(0xff); uart_puthex(byte); can_rx_addr.b[c++] = byte
 	rdaddr();
 	rdaddr();
 	rdaddr();
 	rdaddr();
-	dlc = spi_wrrd(0xff);
-	uart_puthex(dlc);
+	can_rx_dlc = spi_wrrd(0xff);
+	uart_puthex(can_rx_dlc);
 	uart_puts("\n");
-	for (c = 0; c < (dlc & 0x0f); c++)
-		uart_puthex(spi_wrrd(0xff));
+	for (c = 0; c < (can_rx_dlc & 0x0f); c++) {
+		byte = spi_wrrd(0xff);
+		can_rx_data[c] = byte;
+		uart_puthex(byte);
+	}
 	uart_puts("\n");
 	spi_ss(1);
 }
diff --git a/lightctrl.c b/lightctrl.c
index 464a0ae..404ca33 100644
--- a/lightctrl.c
+++ b/lightctrl.c
@@ -27,6 +27,27 @@ const uint8_t __signature[3] __attribute__((section (".signature"), used)) =
 #include "dim.c"
 #include "can.c"
 
+static void can_rx_exec(void)
+{
+	if (can_rx_addr.b[0] == 0xcc
+		&& (can_rx_addr.b[1] & 0xfb) == 0x08
+		&& can_rx_addr.b[2] == 0x04
+		&& can_rx_addr.b[3] == 0x7f
+		&& (can_rx_dlc & 0x4f) == 1) {
+		uart_puts("-- SET\n");
+
+		if (!can_rx_data[0]) {
+			dim_state = 0;
+			dali_send(DALI_ADDR | 0x100);
+		} else {
+			if (!dim_state && can_rx_data[0])
+				dali_send(DALI_ADDR | 0x108);
+			dim_state = can_rx_data[0];
+			dali_send(DALI_ADDR | dim_state);
+		}
+	}
+}
+
 int main(void)
 {
 	DDRD |= (1 << D_LED1) | (1 << D_LED2 ) | (1 << D_TXD) | (1 << D_DALIO);
@@ -51,6 +72,11 @@ int main(void)
 		if (canint) {
 			canint = false;
 			can_int();
+
+			if (can_rx_addr.b[0]) {
+				can_rx_exec();
+				can_rx_addr.u = 0;
+			}
 		}
 		_delay_ms(5);
 		do_tick();
-- 
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