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program SPI flash with arbitrary data

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This commit is contained in:
Michael Ossmann
2013-02-13 22:12:32 -07:00
parent 614c45044e
commit 5a76816b54
3 changed files with 71 additions and 18 deletions
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73
firmware/common/w25q80bv.c
View File

@ -5,7 +5,6 @@
*/
#include <stdint.h>
#include <string.h>
#include "w25q80bv.h"
#include "hackrf_core.h"
#include <libopencm3/lpc43xx/ssp.h>
@ -68,13 +67,6 @@ void w25q80bv_wait_while_busy(void) {
while (w25q80bv_get_status() & W25Q80BV_STATUS_BUSY);
}
void w25q80bv_chip_erase(void) {
w25q80bv_wait_while_busy();
gpio_clear(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
ssp_transfer(SSP0_NUM, W25Q80BV_CHIP_ERASE);
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
}
void w25q80bv_write_enable(void) {
w25q80bv_wait_while_busy();
gpio_clear(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
@ -82,19 +74,70 @@ void w25q80bv_write_enable(void) {
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
}
/* write a 256 byte page */
void w25q80bv_page_program(void) {
void w25q80bv_chip_erase(void) {
w25q80bv_write_enable();
w25q80bv_wait_while_busy();
gpio_clear(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
ssp_transfer(SSP0_NUM, W25Q80BV_CHIP_ERASE);
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
}
/* write up a 256 byte page or partial page */
void w25q80bv_page_program(uint32_t addr, uint16_t len, uint8_t* data) {
int i;
/* do nothing if asked to write beyond a page boundary */
if (((addr & 0xFF) + len) > W25Q80BV_PAGE_LEN)
return;
/* do nothing if we would overflow the flash */
if (addr > (W25Q80BV_NUM_BYTES - len))
return;
w25q80bv_write_enable();
w25q80bv_wait_while_busy();
gpio_clear(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
ssp_transfer(SSP0_NUM, W25Q80BV_PAGE_PROGRAM);
ssp_transfer(SSP0_NUM, 0x00); //FIXME real address high byte
ssp_transfer(SSP0_NUM, 0x00); //FIXME real address middle byte
ssp_transfer(SSP0_NUM, 0x00); //FIXME real address low byte
for (i = 0; i < 256; i++)
ssp_transfer(SSP0_NUM, i); //FIXME real data
ssp_transfer(SSP0_NUM, (addr & 0xFF0000) >> 16);
ssp_transfer(SSP0_NUM, (addr & 0xFF00) >> 8);
ssp_transfer(SSP0_NUM, addr & 0xFF);
for (i = 0; i < len; i++)
ssp_transfer(SSP0_NUM, data[i]);
gpio_set(PORT_SSP0_SSEL, PIN_SSP0_SSEL);
}
/* write an arbitrary number of bytes */
void w25q80bv_program(uint32_t addr, uint32_t len, uint8_t* data)
{
uint16_t first_block_len;
/* do nothing if we would overflow the flash */
if ((len > W25Q80BV_NUM_BYTES) || (addr > W25Q80BV_NUM_BYTES)
|| ((addr + len) > W25Q80BV_NUM_BYTES))
return;
/* handle start not at page boundary */
first_block_len = W25Q80BV_PAGE_LEN - (addr % W25Q80BV_PAGE_LEN);
if (len < first_block_len)
first_block_len = len;
if (first_block_len) {
w25q80bv_page_program(addr, first_block_len, data);
addr += first_block_len;
data += first_block_len;
len -= first_block_len;
}
/* one page at a time on boundaries */
while (len >= W25Q80BV_PAGE_LEN) {
w25q80bv_page_program(addr, W25Q80BV_PAGE_LEN, data);
addr += W25Q80BV_PAGE_LEN;
data += W25Q80BV_PAGE_LEN;
len -= W25Q80BV_PAGE_LEN;
}
/* handle end not at page boundary */
if (len) {
w25q80bv_page_program(addr, len, data);
}
}

7
firmware/common/w25q80bv.h
View File

@ -1,3 +1,7 @@
#define W25Q80BV_PAGE_LEN 256U
#define W25Q80BV_NUM_PAGES 4096U
#define W25Q80BV_NUM_BYTES 1048576U
#define W25Q80BV_WRITE_ENABLE 0x06
#define W25Q80BV_CHIP_ERASE 0xC7
#define W25Q80BV_READ_STATUS1 0x05
@ -6,4 +10,5 @@
#define W25Q80BV_STATUS_BUSY 0x01
void w25q80bv_setup(void);
void w25q80bv_page_program(void);
void w25q80bv_chip_erase(void);
void w25q80bv_program(uint32_t addr, uint32_t len, uint8_t* data);

9
firmware/spiflash/spiflash.c
View File

@ -28,14 +28,19 @@
int main(void)
{
int i;
uint8_t buf[515];
pin_setup();
/* Set 1V8 */
gpio_set(PORT_EN1V8, PIN_EN1V8);
/* program a test page to SPI flash */
/* program test data to SPI flash */
for (i = 0; i < 515; i++)
buf[i] = (i * 3) & 0xFF;
w25q80bv_setup();
w25q80bv_page_program();
w25q80bv_chip_erase();
w25q80bv_program(790, 515, &buf[0]);
/* blink LED1 and LED3 */
while (1)