From: Keith Packard <keithp@keithp.com>
Date: Sun, 19 Aug 2012 04:25:34 +0000 (-0700)
Subject: altos/cc1111: Document SPI bus pin options
X-Git-Tag: 1.1~67^2~30
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=8457ca81adc9d62a7ffe56a7c0c36f2fcadaa682

altos/cc1111: Document SPI bus pin options

Just a comment in the source code about which pins each option selects.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/cc1111/ao_spi.c b/src/cc1111/ao_spi.c
index 88cff9dd..52087fb4 100644
--- a/src/cc1111/ao_spi.c
+++ b/src/cc1111/ao_spi.c
@@ -118,13 +118,34 @@ ao_spi_recv_bus(void __xdata *block, uint16_t len) __reentrant
 }
 
 /*
- * Initialize USART0 for SPI using config alt 2
+ * USART0 SPI config alt 2	 (using this one)
  *
  * 	MO	P1_5
  * 	MI	P1_4
  * 	CLK	P1_3
  *	CSS	P1_2
  *
+ * USART0 SPI config alt 1
+ * 
+ *	MO	P0_3
+ *	MI	P0_2
+ *	CLK	P0_5
+ *	SS	P0_4
+ *
+ * USART1 SPI config alt 2
+ *
+ *	MO	P1_6
+ *	MI	P1_7
+ *	CLK	P1_5
+ *	SS	P1_4
+ *
+ * USART1 SPI config alt 1
+ *
+ *	MO	P0_4
+ *	MI	P0_5
+ *	CLK	P0_3
+ *	SS	P0_2
+ *
  * Chip select is the responsibility of the caller in master mode
  */