From fcbdab4ab27e83acf0ed721583db4ddbf6222341 Mon Sep 17 00:00:00 2001
From: jaseg <git-bigdata-wsl-arch@jaseg.de>
Date: Wed, 26 Feb 2020 13:40:37 +0100
Subject: demo: SPI Flash interface working
---
controller/fw/Makefile | 2 +-
controller/fw/main.c | 24 ++++++++++-
controller/fw/spi_flash.c | 103 ++++++++++++++++++++++++----------------------
controller/fw/spi_flash.h | 12 +++++-
4 files changed, 88 insertions(+), 53 deletions(-)
(limited to 'controller')
diff --git a/controller/fw/Makefile b/controller/fw/Makefile
index 5672f8a..52951b1 100644
--- a/controller/fw/Makefile
+++ b/controller/fw/Makefile
@@ -24,7 +24,7 @@ GDB := $(PREFIX)gdb
CFLAGS += -I$(OPENCM3_DIR)/include -Imspdebug/util -Imspdebug/drivers
-CFLAGS += -Os -std=c11 -g -DSTM32F4
+CFLAGS += -Os -std=gnu11 -g -DSTM32F4
# Note: libopencm3 requires some standard libc definitions from stdint.h and stdbool.h, so we don't pass -nostdinc here.
CFLAGS += -nostdlib -ffreestanding
CFLAGS += -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -g
diff --git a/controller/fw/main.c b/controller/fw/main.c
index 846aa8c..3131df1 100644
--- a/controller/fw/main.c
+++ b/controller/fw/main.c
@@ -2,8 +2,11 @@
#include <stdbool.h>
#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/spi.h>
#include <libopencm3/stm32/gpio.h>
+#include "spi_flash.h"
+
static struct spi_flash_if spif;
static void clock_setup(void)
@@ -33,8 +36,27 @@ static void spi_flash_setup(void)
gpio_set_output_options(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO0 | GPIO3 | GPIO4 | GPIO5);
gpio_set_af(GPIOB, 5, GPIO3 | GPIO4 | GPIO5);
- spi_init(&spif, SPI1, &spi_flash_if_set_cs);
+ spif_init(&spif, 256, SPI1, &spi_flash_if_set_cs);
+}
+
+/*
+void spi_flash_test(void) {
+ spif_clear_mem(&spif);
+
+ uint32_t buf[1024];
+ for (size_t addr=0; addr<0x10000; addr += sizeof(buf)) {
+ for (size_t i=0; i<sizeof(buf); i+= sizeof(buf[0]))
+ buf[i/sizeof(buf[0])] = addr + i;
+
+ spif_write(&spif, addr, sizeof(buf), (char *)buf);
+ }
+
+ for (size_t i=0; i<sizeof(buf)/sizeof(buf[0]); i++)
+ buf[i] = 0;
+ spif_read(&spif, 0x1030, sizeof(buf), (char *)buf);
+ asm volatile ("bkpt");
}
+*/
int main(void)
{
diff --git a/controller/fw/spi_flash.c b/controller/fw/spi_flash.c
index 26ba774..98c773f 100644
--- a/controller/fw/spi_flash.c
+++ b/controller/fw/spi_flash.c
@@ -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));
+ 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);
- wait_for_write(spif);
+ spif_wait_for_write(spif);
}
-void spif_clear_mem(spi_flash_if *spif) {
+void spif_clear_mem(struct spi_flash_if *spif) {
spif_enable_write(spif);
spif->cs(0);
- spi_write(spif->spi_base, BULK_ERASE);
+ spi_xfer(spif->spi_base, BULK_ERASE);
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();
+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_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, 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 (int i = 0; i < len; i++) {
- spi_write(spif->spi_base, data[i]);
+ 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);
}
diff --git a/controller/fw/spi_flash.h b/controller/fw/spi_flash.h
index 933d8c9..e647c6a 100644
--- a/controller/fw/spi_flash.h
+++ b/controller/fw/spi_flash.h
@@ -2,7 +2,7 @@
#define __SPI_FLASH_H__
#include <stdbool.h>
-#include <stdint.h>
+#include <unistd.h>
struct spi_mem_id {
size_t size;
@@ -13,10 +13,18 @@ struct spi_mem_id {
struct spi_flash_if {
struct spi_mem_id id;
uint32_t spi_base;
+ size_t page_size;
void (*cs)(bool val);
};
-int spif_init(struct spi_mem_id *mem_data);
+void spif_init(struct spi_flash_if *spif, size_t page_size, uint32_t spi_base, void (*cs)(bool val));
+
+void spif_write(struct spi_flash_if *spif, size_t addr, size_t len, const char* data);
+void spif_read(struct spi_flash_if *spif, size_t addr, size_t len, char* data);
+
+void spif_clear_mem(struct spi_flash_if *spif);
+void spif_clear_sector(struct spi_flash_if *spif, size_t addr);
+
void spif_deep_power_down(struct spi_flash_if *spif);
void spif_wakeup(struct spi_flash_if *spif);
--
cgit