initial release

Library for accessing the configuration FLASH on Papilio Pro boards

Author: thefloe1

libraries/PFlash/PFlash.cpp

@@ -0,0 +1,120 @@
+/*
+ * PFlash.cpp - library for SPI Flash memory on Papilio Pro
+ * 
+ * by theFloe <thefloe@ptmx.org>
+*/
+
+#include <SPI.h>
+#include "PFlash.h"
+
+
+SPIClass FLASH(1);
+
+
+PFLASH::PFLASH() {
+
+}
+
+
+
+void PFLASH::begin() {
+	pinMode(SPI_FLASH_SEL_PIN, OUTPUT);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+
+	FLASH.begin(WishboneSlot(4));
+	FLASH.setDataMode(SPI_MODE2);  
+}
+
+
+
+uint16_t PFLASH::rdid()
+{
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_RDID);  // RDID
+	unsigned int ret = FLASH.transfer16(0x0000);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+	return ret;
+}
+
+uint8_t PFLASH::read(uint16_t addr)
+{
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_READ);  // READ
+	FLASH.transfer24(FLASHSTART+addr);  
+	byte ret =  FLASH.transfer(0x00);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+	return ret;  
+}
+
+void PFLASH::readBlock(uint16_t addr, uint8_t *data, uint16_t size)
+{
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_READ);  // READ
+	FLASH.transfer24(FLASHSTART+addr);  
+	for (uint16_t i=0; i<size; i++)
+		*data++ =  FLASH.transfer(0x00);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+}
+
+
+uint8_t PFLASH::status()
+{
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_RDSR);  // Status
+	byte  ret =  FLASH.transfer(0x00);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+	return ret;    
+}
+
+void PFLASH::write(uint16_t addr, uint8_t data)
+{
+	if (addr > FLASHSIZE)
+		return;
+
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_WREN);  // WRREN
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_WRITE);  // WRITE
+	FLASH.transfer24(FLASHSTART+addr);  
+	FLASH.transfer(data);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+
+	while (status() & 0x01)
+		delay(1);  
+}
+
+void PFLASH::writeBlock(uint16_t addr, uint8_t *data, uint8_t size)
+{
+	if (addr+size > FLASHSIZE)
+		return;
+
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_WREN);  // WRREN
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_WRITE);  // WRITE
+	FLASH.transfer24(FLASHSTART+addr);  
+	for (uint8_t i=0; i<size; i++)
+		FLASH.transfer(data[i]);
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+
+	while (status() & 0x01)
+		delay(1);  
+}
+
+
+void PFLASH::erase()
+{
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_WREN);  // WRREN
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+
+	digitalWrite(SPI_FLASH_SEL_PIN, LOW);
+	FLASH.transfer(FLASH_SERASE);
+	FLASH.transfer24(FLASHSTART);  
+	digitalWrite(SPI_FLASH_SEL_PIN, HIGH);
+
+	while (status() & 0x01)
+		delay(1);    
+}

libraries/PFlash/PFlash.h

@@ -0,0 +1,45 @@
+/*
+ * PFlash.h - library for SPI Flash memory on Papilio Pro
+ * 
+ * by theFloe <thefloe@ptmx.org>
+*/
+
+#ifndef PFLASH_H
+#define PFLASH_H
+
+#include <SPI.h> // relies on arduino SPI library
+
+
+
+#define FLASHSTART  0x7FF000
+#define FLASHSIZE   0x000FFF
+#define FLASHSECTOR 0x7FF
+
+#define FLASH_RDID    0x9F
+#define FLASH_READ    0x03
+#define FLASH_RDSR    0x05
+#define FLASH_WREN    0x06
+#define FLASH_WRITE   0x02
+#define FLASH_SERASE  0x20
+
+class PFLASH
+{
+  private:
+	
+
+  public:
+	PFLASH(); // default to type 0
+
+						
+	void begin();
+	uint16_t rdid();
+	uint8_t read(uint16_t addr);
+	void readBlock(uint16_t addr, uint8_t *data, uint16_t size);
+	uint8_t status();
+	void write(uint16_t addr, uint8_t data);
+	void writeBlock(uint16_t addr, uint8_t *data, uint8_t size);
+	void erase();
+	
+};
+
+#endif // PFLASH_H