From b2df34e622ddee5d51beb1e9e93d4ecbb1745e55 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sun, 2 Jun 2013 18:25:46 +0200
Subject: Initial experiments with SPI.

---
 firmware/src/p2m.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 firmware/src/p2m.c

(limited to 'firmware/src/p2m.c')

diff --git a/firmware/src/p2m.c b/firmware/src/p2m.c
new file mode 100644
index 0000000..422cd34
--- /dev/null
+++ b/firmware/src/p2m.c
@@ -0,0 +1,126 @@
+/* THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
+ * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
+ * THE AUTHORS SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
+ * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. USE IT AT YOUR OWN RISK */
+
+#include <LPC17xx.h>
+
+#define SPI
+
+#ifdef DMA
+
+#include "dac.h"
+#include "sample.h"
+
+int main (void) 
+{
+	dac_init();
+
+	//	int i = 0;
+	while(1) {
+		//		fiprintf(stderr, "Play #%d: %d samples\n\r", i++, sizeof(samples) / sizeof(short));
+		dac_play_samples(samples, sizeof(samples) / sizeof(short));
+	}
+	return 0;
+}
+
+#endif
+volatile uint32_t temp;
+
+void _delay(uint32_t del);
+
+#ifdef BLINKY
+
+int main (void) 
+{
+    LPC_SC->PCONP |= ( 1 << 15 ); // power up GPIO
+    LPC_GPIO1->FIODIR |= 1 << 29; // puts P1.29 into output mode.
+    while(1)
+    {
+        LPC_GPIO1->FIOPIN |= 1 << 29; // make P1.29 high
+        _delay( 1 << 24 );
+        LPC_GPIO1->FIOPIN &= ~( 1 << 29 ); // make P1.29 low
+        _delay( 1 << 24 );
+    }
+    return 0;
+  
+}
+
+#endif
+
+#ifdef UART
+
+#include "LPC17xx.h"
+#include <stdint.h>
+#include "uart.h"
+
+int main (void)
+{ 
+	/* SystemClockUpdate() updates the SystemFrequency variable */
+	// SystemCoreClockUpdate();//SystemClockUpdate();
+  UARTInit(0, 115200);	/* baud rate setting */
+	//  UARTInit(1, 8000);	/* baud rate setting */
+
+	LPC_SC->PCONP |= ( 1 << 15 ); // power up GPIO
+	LPC_GPIO1->FIODIR |= 1 << 29; // puts P1.29 into output mode.
+
+  while (1) {
+		LPC_GPIO1->FIOPIN |= 1 << 29; // make P1.29 high
+
+		//LPC_UART0->IER = IER_THRE | IER_RLS;			// Disable RBR
+		UARTSend(0, (uint8_t *)"hello\n\r", 7);
+		//LPC_UART0->IER = IER_THRE | IER_RLS | IER_RBR;	// Re-enable RBR
+
+		_delay( 1 << 22 );
+
+		///
+
+		LPC_GPIO1->FIOPIN &= ~( 1 << 29 ); // make P1.29 low
+		/*
+		LPC_UART0->IER = IER_THRE | IER_RLS;			// Disable RBR
+		UARTSend( 0, (uint8_t *)"l", 1);
+		LPC_UART0->IER = IER_THRE | IER_RLS | IER_RBR;	// Re-enable RBR
+		*/
+		_delay( 1 << 22 );
+
+  }
+}
+
+#endif
+
+#ifdef SPI
+
+#include "LPC17xx.h"
+#include <stdint.h>
+#include "uart.h"
+
+int main (void)
+{ 
+  UARTInit(0, 115200);	/* baud rate setting */
+
+	UARTSend(0, (uint8_t *)"init\n\r", 6);
+
+	// PCONP register (Table 46), set bit PCSPI.
+	LPC_SC->PCONP |= 1 << 8;
+
+	// In the PCLKSEL0 register (Table 40), set bit PCLK_SPI. In master mode, the
+	// clock must be an even number greater than or equal to 8
+	LPC_SC->PCLKSEL0PCLK_SPI = 0;//(3 << 17);
+	// 1Mhz
+
+  while (1) {
+		UARTSend(0, (uint8_t *)"hello\n\r", 7);
+
+		_delay( 1 << 22 );
+  }
+}
+
+#endif
+
+void _delay(uint32_t del)
+{
+    uint32_t i;
+    for(i=0;i<del;i++)
+        temp = i;
+}
-- 
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