demo: SPI Flash interface working
This commit is contained in:
jaseg
parent
2964bda23c
commit
fcbdab4ab2
4 changed files with 95 additions and 60 deletions
|
|
@ -1,5 +1,6 @@
|
|||
/* Library for SPI flash 25* devices.
|
||||
* Copyright (c) 2014 Multi-Tech Systems
|
||||
* Copyright (c) 2020 Jan Goette <ma@jaseg.de>
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
|
|
@ -20,6 +21,8 @@
|
|||
* SOFTWARE.
|
||||
*/
|
||||
|
||||
#include "spi_flash.h"
|
||||
#include <libopencm3/stm32/spi.h>
|
||||
|
||||
enum {
|
||||
WRITE_ENABLE = 0x06,
|
||||
|
|
@ -46,113 +49,115 @@ enum {
|
|||
};
|
||||
|
||||
|
||||
static void enable_write(struct spi_flash_if *spif);
|
||||
static void wait_for_write(struct spi_flash_if *spif);
|
||||
static void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const char* data);
|
||||
static uint8_t spif_read_status(struct spi_flash_if *spif);
|
||||
static void spif_enable_write(struct spi_flash_if *spif);
|
||||
static void spif_wait_for_write(struct spi_flash_if *spif);
|
||||
|
||||
#define low_byte(x) (x&0xff)
|
||||
#define mid_byte(x) ((x>>8)&0xff)
|
||||
#define high_byte(x) ((x>>16)&0xff)
|
||||
|
||||
|
||||
void spif_init(struct spi_flash_if *spif, uint32_t spi_base, void (*cs)(bool val)) {
|
||||
void spif_init(struct spi_flash_if *spif, size_t page_size, uint32_t spi_base, void (*cs)(bool val)) {
|
||||
|
||||
spif->spi_base = spi_base;
|
||||
spif->page_size = page_size;
|
||||
spif->cs = cs;
|
||||
spif->cs(1);
|
||||
|
||||
spi_reset(spif->spi_base);
|
||||
spi_init_master(spif->spi_base,
|
||||
SPI_CR1_BAUDRATE_FPCLK_DIV_1,
|
||||
SPI_CR1_BAUDRATE_FPCLK_DIV_2,
|
||||
SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE,
|
||||
CPI_CR1_CPHA_CLK_TRANSITION_2,
|
||||
SPI_CR1_CPHA_CLK_TRANSITION_2,
|
||||
SPI_CR1_DFF_8BIT,
|
||||
CPI_CR1_MSBFIRST);
|
||||
SPI_CR1_MSBFIRST);
|
||||
|
||||
spi_enable_software_slave_management(spif->spi_base);
|
||||
spi_set_nss_high(spif->spi_base);
|
||||
|
||||
spi_enable(spif->spi_base);
|
||||
|
||||
spif->cs(0)
|
||||
spif->cs(0);
|
||||
spi_send(spif->spi_base, READ_IDENTIFICATION);
|
||||
spif->id.mfg_id = spi_read(SPI1);
|
||||
spif->id.type = spi_read(SPI1);
|
||||
spif->id.size = 1<<spi_read(SPI1);
|
||||
spif->cs(1)
|
||||
spif->id.mfg_id = spi_xfer(spif->spi_base, 0);
|
||||
spif->id.type = spi_xfer(spif->spi_base, 0);
|
||||
spif->id.size = 1<<spi_xfer(spif->spi_base, 0);
|
||||
spif->cs(1);
|
||||
}
|
||||
|
||||
void spif_read(struct spi_flash_if *spif, int addr, int len, char* data) {
|
||||
void spif_read(struct spi_flash_if *spif, size_t addr, size_t len, char* data) {
|
||||
spif_enable_write(spif);
|
||||
|
||||
spif->cs(0)
|
||||
spi_write(spif->spi_base, READ_DATA);
|
||||
spi_write(spif->spi_base, high_byte(addr));
|
||||
spi_write(spif->spi_base, mid_byte(addr));
|
||||
spi_write(spif->spi_base, low_byte(addr));
|
||||
spif->cs(0);
|
||||
spi_xfer(spif->spi_base, READ_DATA);
|
||||
spi_xfer(spif->spi_base, high_byte(addr));
|
||||
spi_xfer(spif->spi_base, mid_byte(addr));
|
||||
spi_xfer(spif->spi_base, low_byte(addr));
|
||||
|
||||
for (size_t i = 0; i < len; i++)
|
||||
data[i] = spi_read(spif->spi_base);
|
||||
data[i] = spi_xfer(spif->spi_base, 0);
|
||||
|
||||
spif->cs(1);
|
||||
}
|
||||
|
||||
void spif_write(spi_flash_if *spif, size_t addr, size_t len, const char* data) {
|
||||
size_t written = 0;
|
||||
size_t write_size = 0;
|
||||
void spif_write(struct spi_flash_if *spif, size_t addr, size_t len, const char* data) {
|
||||
size_t written = 0, write_size = 0;
|
||||
|
||||
while (written < len) {
|
||||
write_size = _page_size - ((addr + written) % _page_size);
|
||||
if (written + write_size > len) {
|
||||
write_size = spif->page_size - ((addr + written) % spif->page_size);
|
||||
if (written + write_size > len)
|
||||
write_size = len - written;
|
||||
}
|
||||
|
||||
write_page(addr + written, write_size, data + written);
|
||||
spif_write_page(spif, addr + written, write_size, data + written);
|
||||
written += write_size;
|
||||
}
|
||||
}
|
||||
|
||||
uint8_t spif_read_status(spi_flash_if *spif) {
|
||||
static uint8_t spif_read_status(struct spi_flash_if *spif) {
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_base, READ_STATUS);
|
||||
uint8_t status = spi_read(spif->spi_base);
|
||||
spi_xfer(spif->spi_base, READ_STATUS);
|
||||
uint8_t status = spi_xfer(spif->spi_base, 0);
|
||||
spif->cs(1);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
void spif_clear_sector(spi_flash_if *spif, size_t addr) {
|
||||
void spif_clear_sector(struct spi_flash_if *spif, size_t addr) {
|
||||
spif_enable_write(spif);
|
||||
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_abse, SECTOR_ERASE);
|
||||
spi_write(spif->spi_abse, high_byte(addr));
|
||||
spi_write(spif->spi_abse, mid_byte(addr));
|
||||
spi_write(spif->spi_abse, low_byte(addr));
|
||||
spif->cs(1);
|
||||
|
||||
wait_for_write(spif);
|
||||
}
|
||||
|
||||
void spif_clear_mem(spi_flash_if *spif) {
|
||||
spif_enable_write(spif);
|
||||
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_base, BULK_ERASE);
|
||||
spi_xfer(spif->spi_base, SECTOR_ERASE);
|
||||
spi_xfer(spif->spi_base, high_byte(addr));
|
||||
spi_xfer(spif->spi_base, mid_byte(addr));
|
||||
spi_xfer(spif->spi_base, low_byte(addr));
|
||||
spif->cs(1);
|
||||
|
||||
spif_wait_for_write(spif);
|
||||
}
|
||||
|
||||
void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const char* data) {
|
||||
spif_enable_write();
|
||||
void spif_clear_mem(struct spi_flash_if *spif) {
|
||||
spif_enable_write(spif);
|
||||
|
||||
spif->cs(0);
|
||||
spi_write(spif->base, PAGE_PROGRAM);
|
||||
spi_write(spif->base, high_byte(addr));
|
||||
spi_write(spif->base, mid_byte(addr));
|
||||
spi_write(spif->base, low_byte(addr));
|
||||
spi_xfer(spif->spi_base, BULK_ERASE);
|
||||
spif->cs(1);
|
||||
|
||||
for (int i = 0; i < len; i++) {
|
||||
spi_write(spif->spi_base, data[i]);
|
||||
spif_wait_for_write(spif);
|
||||
}
|
||||
|
||||
static void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const char* data) {
|
||||
spif_enable_write(spif);
|
||||
|
||||
spif->cs(0);
|
||||
spi_xfer(spif->spi_base, PAGE_PROGRAM);
|
||||
spi_xfer(spif->spi_base, high_byte(addr));
|
||||
spi_xfer(spif->spi_base, mid_byte(addr));
|
||||
spi_xfer(spif->spi_base, low_byte(addr));
|
||||
|
||||
for (size_t i = 0; i < len; i++) {
|
||||
spi_xfer(spif->spi_base, data[i]);
|
||||
}
|
||||
|
||||
spif->cs(1);
|
||||
|
|
@ -161,7 +166,7 @@ void spif_write_page(struct spi_flash_if *spif, size_t addr, size_t len, const c
|
|||
|
||||
static void spif_enable_write(struct spi_flash_if *spif) {
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_base, WRITE_ENABLE);
|
||||
spi_xfer(spif->spi_base, WRITE_ENABLE);
|
||||
spif->cs(1);
|
||||
}
|
||||
|
||||
|
|
@ -173,12 +178,12 @@ static void spif_wait_for_write(struct spi_flash_if *spif) {
|
|||
|
||||
void spif_deep_power_down(struct spi_flash_if *spif) {
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_base, DEEP_POWER_DOWN);
|
||||
spif->cs(1)
|
||||
spi_xfer(spif->spi_base, DEEP_POWER_DOWN);
|
||||
spif->cs(1);
|
||||
}
|
||||
|
||||
void spif_wakeup(struct spi_flash_if *spif) {
|
||||
spif->cs(0);
|
||||
spi_write(spif->spi_base, DEEP_POWER_DOWN_RELEASE);
|
||||
spif->cs(1)
|
||||
spi_xfer(spif->spi_base, DEEP_POWER_DOWN_RELEASE);
|
||||
spif->cs(1);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue