From 8221cc260ef7707efbeea862c5a599371fa1cd9e Mon Sep 17 00:00:00 2001
From: Mariano Alvira <mar@devl.org>
Date: Wed, 1 Apr 2009 17:57:02 -0400
Subject: [PATCH] starting a rftest rx test. This will put it in the continuous
 receive mode and send the bytes received to the uart.

---
 tests/rftest-rx.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 tests/rftest-rx.c

diff --git a/tests/rftest-rx.c b/tests/rftest-rx.c
new file mode 100644
index 000000000..eeb0b3d9c
--- /dev/null
+++ b/tests/rftest-rx.c
@@ -0,0 +1,49 @@
+#define GPIO_FUNC_SEL0  0x80000018 /* GPIO 15 - 0;  2 bit blocks */
+
+#define BASE_UART1      0x80005000
+#define UART1_CON       0x80005000
+#define UART1_STAT      0x80005004
+#define UART1_DATA      0x80005008
+#define UR1CON          0x8000500c
+#define UT1CON          0x80005010
+#define UART1_CTS       0x80005014
+#define UART1_BR        0x80005018
+
+#define MACA_RESET      0x80004004
+#define MACA_CONTROL    0x8000400c
+#define MACA_STATUS     0x80004010
+#define MACA_DMARX      0x80004080
+#define MACA_DMATX      0x80004084
+#define MACA_GETRXLVL   0x80004098
+#define MACA_PREAMBLE   0x8000411c
+
+#include "embedded_types.h"
+
+void main(void) {
+	/* Restore UART regs. to default */
+	/* in case there is still bootloader state leftover */
+
+	*(volatile uint32_t *)UART1_CON = 0x0000c800; /* mask interrupts, 16 bit sample --- helps explain the baud rate */
+
+	/* INC = 767; MOD = 9999 works: 115200 @ 24 MHz 16 bit sample */
+	#define INC 767
+	#define MOD 9999
+	*(volatile uint32_t *)UART1_BR = INC<<16 | MOD; 
+
+	/* see Section 11.5.1.2 Alternate Modes */
+	/* you must enable the peripheral first BEFORE setting the function in GPIO_FUNC_SEL */
+	/* From the datasheet: "The peripheral function will control operation of the pad IF */
+	/* THE PERIPHERAL IS ENABLED. */
+	*(volatile uint32_t *)UART1_CON = 0x00000003; /* enable receive and transmit */
+	*(volatile uint32_t *)GPIO_FUNC_SEL0 = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
+
+	uint8_t c;
+	while(1) {
+		if(*(volatile uint32_t*)UR1CON > 0) {
+			/* Receive buffer isn't empty */
+			/* read a byte and write it to the transmit buffer */
+			c = *(volatile uint32_t *)UART1_DATA;
+			*(volatile uint32_t *)UART1_DATA = c;
+		}
+	};
+}