mbed W25Q32BV reader

gistfile1.cpp

#include "mbed.h"
 
SPI spi(p5, p6, p7); // mosi, miso, sclk
DigitalOut cs(p8);
Serial pc(USBTX, USBRX);
DigitalOut led[]={LED1,LED2,LED3,LED4};

int main() {
	char *p, *op;
	int i, j, k;
	unsigned int address = 0;
	
	cs = 1; // disable
	
	pc.baud(115200);
	
	p = (char *)malloc(16384); // 16KB
	op = p;
	pc.printf("memory allocated.\r\n");
	spi.format(8,3);
	spi.frequency(1000000);
	pc.printf("spi mode changed.\r\n");
	
	cs = 0; // enable
	
	for (i = 0; i < 4; i++)
	{
		spi.write(0x90); // skip dummy
	}
	printf("manufacture id = 0x%X\r\n", spi.write(0x90));
	printf("device id = 0x%X\r\n\r\n", spi.write(0x90));
	
	cs = 1; // disable
	for (i = 0; i < 256; i++)
	{
		/*
		pc.printf("Block %d/256\r\n", i + 1);
		pc.printf("address: %X\r\n", address);
		pc.printf("A23-A16: %02X\r\n", (address >> 16) & 0xFF);
		pc.printf("A15-A8: %02X\r\n", (address >> 8) & 0xFF);
		pc.printf("A7-A0: %02X\r\n", address & 0xFF);
		wait(1); // debug
		*/
		cs = 0; // enable
		// Fast Read start
		spi.write(0x0B); // instruction id
		spi.write((address >> 16) & 0xFF); // 24bit address A23-A16
		spi.write((address >> 8) & 0xFF); // 24bit address A15-A8
		spi.write(address & 0xFF); // 24bit address A7-A0
		spi.write(0x00); // dummy
		for (j = 0; j < 16384; j++)
		{
			*p = spi.write(0x00); // dummy
			p++;
		}
		p = op; // seek
		for (j = 0; j < 16384; j++)
		{
			pc.printf("%02X ", *p); // output
			*p = 0; // clear buffer
			p++;
		}
		pc.printf("\r\n");
		p = op; // seek
		address += 16384;
		cs = 1; // disable
		led[i % 4] = !led[i % 4];
	}
	pc.printf("Done.\r\n");
	led[0] = 0;
	led[1] = 0;
	led[2] = 0;
	led[3] = 0;
	while(1)
	{
		led[0] = !led[0];
		led[1] = !led[1];
		led[2] = !led[2];
		led[3] = !led[3];
		wait(1);
	} //trap
}